Johann P. Engelbrecht

Research Professor Emeritus
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Aerosols sampling and analysis, Airborne mineral dust, Dust re-suspensions, X-ray diffraction, Receptor modeling, Dust characterization

Professional Interests

Dr. Johann Engelbrecht, Research Professor Emeritus in the Division of Atmospheric Sciences (DAS) at the Desert Research Institute (DRI), has more than 25 years’ experience in air quality studies in South Africa, U.S.A, and elsewhere, and more than 40 years’ experience in Geology, Geochemistry, and Mineralogy. His qualifications in the Earth Sciences (Mineralogy, Geochemistry, Geology, Chemistry, Physics, Mathematics and Statistics) and experience in Program Management allows him to participate in a variety of multidisciplinary air quality and other environmental projects.

He was the project leader and principal investigator for several government supported air quality studies in the industrialized regions of South Africa, including the Vaal Triangle Aerosol Monitoring and Source Apportionment Study, and the Qalabotjha Low-Smoke Fuels Macro-Scale Experiment.  Dr. Engelbrecht pioneered the implementation of PM10 and PM2.5 monitoring and analysis as well as CMB receptor modeling in South Africa.  He was instrumental in setting up a facility at Mintek (Council for Minerals Technology), Johannesburg, for the analysis of aerosol filter samples.

At the same time Dr Engelbrecht helped develop an on-stream X-ray diffraction system for process control in the industrial minerals industry.   He has extensive experience in the areas of X-ray fluorescence spectrometry (XRF), X-ray diffraction (XRD), Electron Probe Micro-analysis (EPMA), and Scanning Electron Microscopy (SEM) of minerals and other materials. He also specializes in multivariate data analysis, including Principal Components Analysis (PCA) and Multiple Linear Regression Analysis and several types of Receptor Modeling.
 
Since joining the DRI in Reno Nevada,  Dr. Engelbrecht has been principal or co-principal investigator on a variety of air quality studies, including the MARAMA receptor modeling study, the VISTAS organic tracers and CMB study, the DOE’s Yucca Mountain air quality monitoring study, the DOD’s Middle East, Enhanced Particulate Matter Surveillance Program, the Lake Tahoe Source Attribution study, the NASA Characterization of Wavelength Dependent Mineral Dust and Biomass Burning Aerosol Single Scattering Albedo for GLORY program, and the Mobile Aerosol Monitoring System for the U.S. Department of Defense.  He established the DRI’s XRD laboratory (http://www.dri.edu/atmospheric-sciences/atms-laboratories/1770-x-ray-diffraction-analysis-of-mineral-dusts-in-aerosols) and mineral dust re-suspension facility (http://www.dri.edu/atmospheric-sciences/atms-laboratories/4185-dust-entrainment-and-characterization-facility).

Dr. Engelbrecht is the author or co-author of more than 50 peer reviewed publications, of 53 reports, and has made more than 60 presentations at international conferences and workshops.

His latest research interest includes characterizing windblown mineral dusts, from the Middle East and the Sahara, with emphasis on their potential health effects, and global climate. He was invited to spend two months in 2009, as visiting Professor at the University of Las Palmas in Gran Canaria, Spain, furthering his research on the health impact of Saharan dust. For the past three years he had been collaborating closely with researchers at King Abdullah University of Science and Technology (KAUST) in Saudi Arabia, on the measurement of Arabian dust and its impact on the Red Sea.  Early in 2016 the Geological Survey of Iran invited Dr Engelbrecht to participate in the International Geosciences Conference in Tehran, followed by the First International Conference on Dust at the Shahid Chamran University of Ahvaz, in Ahvaz

Laboratory Information

Education

DegreeYearInstitutionArea
Ph.D. 1987 University of Pretoria, South Africa Geology
M.Sc. 1973 University of Pretoria, South Africa Geology
B.Sc. (Hons) 1970 University of Pretoria, South Africa Geology
B.Sc. 1963 University of Pretoria, South Africa Chemistry, Physics

Professional Experience

DatesTitle/Experience
2016 - present Research Professor Emeritus, Desert Research Institute, Division of Atmospheric Sciences, Nevada, Reno, NV
2010-2016 Research Professor, Desert Research Institute, Division of Atmospheric Sciences, Nevada, Reno, NV
2001-2010 Associate Research Professor, Desert Research Institute, Division of Atmospheric Sciences, Nevada, Reno, NV
1989-2001 Specialist Scientist, Environmental & On-Line Analysis, Mintek, Mineralogy Division, South Africa
2001-2001 Associate Professor, Geology Department, Rand Afrikaans University, Johannesburg, South Africa
1985-1989 Senior Research Scientist, Geology Department, University of Potchefstroom for Christian Higher Education, South Africa
1975-1985 Senior Lecturer, Geology Department, University of Pretoria, South Africa
1973-1975 Lecturer, Geology Department, University of Port Elizabeth, South Africa
1972 Lecturer (temporary), Geology Department, University of Pretoria, South Africa
1967-1971 Lecturer, Department of Physical Sciences, Pretoria Technicon, South Africa
1966-1964 Laboratory Assistant, Chemistry Department, University of Pretoria, South Africa
1964 Industrial Chemist, Consolidated Glass Works, Pretoria, South Africa

Professional Activities

Associations:
  • Geological Society of America (GSA)
  • American Geophysical Union (AGU)
  • Geochemical Society
  • International Medical Geology Association (IMGA)

Publications & Presentations

2018

Engelbrecht, J. P. (2018). Aerosol sampling and analysis for pollution source identification and apportionment, 2nd International Conference on Dust: Ilam, Iran, April 25, 2018-April 27, 2018

2017

Chung, C.E., Hoffer, A., Beres, N. D., Moosmüller, H., Liu, C., Green, M. C., Kim, S., Engelbrecht, J. P., Gelencsér, A. (2017). Near-Infrared Light Absorption by Brown Carbon in the Ambient Atmosphere, 2017 Fall Meeting of the American Geophysical Union: New Orleans, LA, December 11, 2017-December 15, 2017
Engelbrecht, J. P., Moosmüller, H., Jayanty, R.K.M., Casuccio, G. (2017). Optical Properties of Suspended Mineral Dusts from Desert Source Regions, Fourth Santa Fe Climate Conference: Santa Fe, NM, February 5, 2017-February 10, 2017
Engelbrecht, J. P., Stenchikov, G., Prakash, P. J., Lersch, T., Anisimov, A., Shevchenko, I. (2017). Physical and chemical properties of deposited airborne particulates over the Arabian Red Sea coastal plain, Atmos. Chem. Phys., 17, 11467-11490, doi: 10.5194/acp-17-11467-2017
Engelbrecht, J. P., Stenchikov, G., Jish Prakash, P., Anisimov, A., Shevchenko, I. (2017). Physical and chemical properties of deposited airborne particulates over the Arabian Red Sea coastal plain, Goldschmidt 2017: Paris, August 13, 2017-August 18, 2017
Menéndez, I., Derbyshire, E., Carrillo, T., Caballero, E., Engelbrecht, J. P., Romero, L. E., Mayer, P. L., de Castro, F. R., Mangas, J. (2017). Saharan dust and the impact on adult and elderly allergic patients: the effect of threshold values in the northern sector of Gran Canaria, Spain, International Journal of Environmental Health Research, 27, (2), 144-160, doi: 10.1080/09603123.2017.1292496
Menéndez, I., Derbyshire, E., Carrillo, T., Caballero, E., Engelbrecht, J. P., Romero, L. E., Mayer, P. L., Rodríguez de Castro, F., Mangas, J. (2017). Saharan Dust and the Impact on Adult and Elderly Allergic Patients: The Effect of Threshold Values in the Northern Sector of Gran Canaria, Spain, International Journal of Environmental Health Research, 27, (2), 144-160, doi: 10.1080/09603123.2017.1292496

2016

Engelbrecht, J. P. (2016). Sampling and Analysis of Airborne Mineral Dust from Arid Regions of the Middle East, The 34th National and the 2nd International Geosciences Congress: Tehran, Iran, February 22, 2016
Engelbrecht, J. P. (2016). Characterizing Dust to Identify Dust Sources in the Middle East, The First International Conference on Dust [invited talk]: Shahid Chamran University of Ahvaz, Ahvaz, Iran, March 2, 2016
Engelbrecht, J. P. (2016). Quantifying Dust Sources in Countries of the Middle East, DUST 2016, 2nd International Conference on Atmospheric Dust: Castellaneta Marina, Italy, June 13, 2016
Engelbrecht, J. P., Moosmüller, H., Jayanty, R., Casuccio, G. (2016). Optical Properties of Suspended Mineral Dusts from Desert Source Regions, Atmospheric Optics: Aerosols, Visibility, and the Radiative Balance, A&WMA Visibility Specialty Conference: Snow King Hotel, Jackson Hole, WY, September 27, 2016-September 30, 2016
Engelbrecht, J. P., Moosmüller, H., Pincock, S. L., Jayanty, R. M., Casuccio, G. (2016). Mineralogical and Physical Interrelationships of Airborne Mineral Dusts Controlling Their Optical Properties, DUST 2016, 2nd International Conference on Atmospheric Dust: Castellaneta Marina, Italy, June 17, 2016
Engelbrecht, J. P., Moosmüller, H., Pincock, S. L., Jayanty, R., Lersch, T., Casuccio, G. (2016). Technical Note: Mineralogical, Chemical, Morphological, and Optical Interrelationships of Mineral Dust Re-suspensions, Atmos. Chem. Phys., 16, 10809-10830, doi: 10.5194/acp-16-10809-2016
Jish Prakash, P., Stenchikov, G., Tao, W., Yapici, T., Warsama, B., Engelbrecht, J. P. (2016). Arabian Red Sea Coastal Soils as Potential Mineral Dust Sources, Atmos. Chem. Physics, 16, (18), 11991-12004, doi: 10.5194/acp-16-11991-2016

2015

Engelbrecht, J. P. (2015). Enhanced Particulate Matter Surveillance Program - Phase II - Data Mining II, Contract No. W91ZLK-15-P-0129, Modification No. P00002, U.S. Army Institute of Public Health (AIPH): Aberdeen Proving Ground, MD, September 30, 2015
Engelbrecht, J. P., Kavouras, I. G., Shafer, D. S., Campbell, D. E., Campbell, S. A., McCurdy, G. D., Kohl, S. D., Nikolich, G., Sheetz, L. H., Gertler, A. W. (2015). Chemical Variability of PM10 and PM2.5 in Southwestern Rural Nevada, USA, Water Air Soil Pollut., 226:217, 1-13, doi: 10.1007/s11270-015-2481-8
Engelbrecht, J. P., Moosmüller, H., Pincock, S. L., Campbell, D. E., Jayanty, R., Casuccio, G. (2015). Optical Properties of Suspended Mineral Dusts from Desert Source Regions, 34th Annual Conference of the American Association for Aerosol Research: Minneapolis, MN, October 12, 2015
Engelbrecht, J. P., Moosmüller, H., Pincock, S. L., Campbell, D. E., Jayanty, R., Casuccio, G. (2015). Optical Properties of Suspended Mineral Dusts from Desert Source Regions, 15th Electromagnetic and Light Scattering (ELS) Conference: Leipzig, Germany, June 21, 2015
Engelbrecht, J. P., Moosmüller, H., Pincock, S. L., R.K.M. Jayanty, Casuccio, G. (2015). Relating Optical Properties of Dusts to Their Mineralogical and Physical Interrelationships, 2015 AGU Fall Meeting: San Francisco, CA, December 14, 2015-December 18, 2015
Etyemezian, V. R., Engelbrecht, J. P., Gillies, J. A., Kavouras, I. G., DuBois, D. W. (2015). Overview of Mineral Dust as an Air Pollutant , 25th Annual Meeting of the International Society of Exposure Science: Henderson, Nevada, USA, October 18, 2015-January 22, 2016
Gillies, J. A., Etyemezian, V. R., Zhu, D., Nikolich, G., Engelbrecht, J. P., Shaw, W., Berg, L., Chapman, E., Clapton, S., Pekour, M., Rishell, J., Lutz, F. (2015). Characterizing and quantifying emissions and transport of fugitive dust emissions due to Department of Defense Activities, Final Report prepared for SERDP: Alexandria, VA. January 2015
Zhang, Y., Mahowald, N., Scanza, R. A., Journet, E., Desboeufs, K., Albani, S., Kok, J. F., Zhuang, G., Chen, Y., Cohen, D. D., Paytan, A., Patey, M. D., Achterberg, E. P., Engelbrecht, J. P., Fomba, K. W. (2015). Modeling the Global Emission, Transport and Deposition of Trace Elements Associated with Mineral Dust, Biogeosciences, 12, 5771-5792

2014

Engelbrecht, J. P., Casuccio, G., Lersch, T. (2014). Particle Analysis of Ambient and Re-suspended Dusts from Global Dust Sources, Presented at the DUST2014, International Conference on Dust, Presented at the DUST2014, International Conference on Dust: Castellaneta Marina, Taranto, Italy, June 1, 2014
Engelbrecht, J. P., Menéndez, I., Derbyshire, E. (2014). Sources of PM2.5 Impacting on Gran Canaria, Spain, Catena, 117, 119-132
Engelbrecht, J. P., Moosmüller, H., Pincock, S. L., Campbell, D. E., Chakrabarty, R. K., Jayanty, R., Casuccio, G. (2014). Optical Properties of Suspended Mineral Dusts from Desert Source Region, 33nd Annual Conference of the American Association for Aerosol Research: Orlando, FL, October 20, 2014
Engelbrecht, J. P., Moosmüller, H., Pincock, S. L., Jayanty, R., Casuccio, G. (2014). Mineralogical, Chemical, and Optical Interrelationships of Re-suspended Mineral Dusts from Global Source Regions, Poster presented at the DUST2014, International Conference on Dust: Castellaneta Marina, Taranto, Italy, June 1, 2014
Engelbrecht, J. P., Moosmüller, H., Pincock, S. L., Jayanty, R., Casuccio, G. (2014). Mineralogical, Chemical, and Optical Interrelationships of Re-suspended Mineral Dusts from Global Source Regions, Poster, 2014 AGU Fall Meeting: San Francisco, CA, December 15, 2014
Menéndez, I., Engelbrecht, J. P., Pérez-Chacón, E., Mangas, J., Tauler, E., Derbyshire, E., Cana, L., Alonso, I. (2014). Dust deposits on La Graciosa Island (Canary Islands, Spain): Texture, mineralogy and a case study of recent dust plume transport, Catena, 117, 133-144
Puthan Purakkal, J., Stenchikov, G., Engelbrecht, J. P. (2014). Characterizing Mineral Dust from the Arabian coast of the Red Sea, 2014 AGU Fall Meeting: San Francisco, CA, December 15, 2014
Samburova, V., Murray, A., Hallar, A. G., Yang, X., Zielinska, B. K., Siegel, B., Beres, N. D., Engelbrecht, J. P., Moosmüller, H. (2014). Analysis of Atmospheric Biological Particles with High Resolution Microscopy Techniques, Abstract 7BA.5 presented at the American Association for Aerosol Research (AAAR) 33st Annual Conference: Orlando, FL, October 20, 2014
Siegel, B., Beres, N. D., Engelbrecht, J. P., Moosmüller, H. (2014). Light Extinction Caused by Dust Deposition on Photovoltaic Cells, Desert Research Institute, NSHE Bright Stars Undergraduate Presentations: Reno, NV, September 10, 2014
Siegel, B., Beres, N. D., Engelbrecht, J. P., Moosmüller, H. (2014). Light Extinction Caused by Dust Deposition on Photovoltaic Cells, Poster Session at University of NV, Reno: Reno, NV, August 13, 2014
Zhang, Y., Mahowald, N., Scanza, R., Journet, E., Desboeufs, K., Albani, S., Kok, J., Zhuang, G., Chen, Y., Cohen, D. D., Paytan, A., Patey, M. D., Achterberg, E. P., Engelbrecht, J. P., Fomba, K. W. (2014). Modeling the global emission, transport and deposition of trace elements associated with mineral dust, Biogeosciences Discussion, 11, 17491-17541, doi: 10.5194/bgd-11-17491-201

2013

Engelbrecht, J. P. (2013). Analysis and properties of individual airborne mineral dust particles, 5th International Conference on Medical Geology (MEDGEO 2013): Arlington, VA, August 25, 2013-August 29, 2013
Engelbrecht, J. P., Etyemezian, V. R. (2013). Workshop on Dust Measurement & Characterization, King Abdullah University of Science and Technology (KAUST): Saudi Arabia, November 11, 2013-November 15, 2013
Engelbrecht, J. P., Jayanty, R. K. (2013). Assessing sources of airborne mineral dust and other aerosols, in Iraq, Aeolian Res., 9, 153-160
Engelbrecht, J. P., Jayanty, R. (2013). Assessing sources of airborne mineral dusts and other aerosols, in Iraq, 5th International Conference on Medical Geology (MEDGEO 2013): Arlington, VA, August 25, 2013-August 29, 2013
Engelbrecht, J. P., Moosmüller, H., Pincock, S. L., Jayanty, R., Casuccio, G. (2013). Mineralogical, chemical, and optical interrelationships of mineral dusts from desert source regions, AGU Fall Meeting: San Francisco, CA, December 8, 2013-December 13, 2013
Moosmüller, H., Engelbrecht, J. P. (2013). Dust Direct Radiative Forcing and the Complex Refractive Index of Hematite, Goldschmidt2013: Florence, Italy, August 25, 2013
Moosmüller, H., Engelbrecht, J. P. (2013). Complex Refractive Index of Hematite in the Visible and Near Visible: A Review, 32nd Annual Conference of the American Association for Aerosol Research: Portland, OR, September 30, 2013-October 4, 2013

2012

Engelbrecht, J. P. (2012). Characterizing Mineral Dust for Surveillance Purposes, Weather Impacts Decision Aids (WIDA) Workshop: Reno, NV, March 13, 2012-March 15, 2012
Engelbrecht, J. P., Gillies, J. A., Etyemezian, V. R., Kuhns, H. D., Baker, S. E., Zhu, D., Nikolich, G., Kohl, S. D. (2012). Controls on mineral dust emissions at four arid locations in the western USA, Aeolian Res., 6, 41-54
Engelbrecht, J. P., Jayanty, R. (2012). Assessing sources of airborne mineral dusts and other aerosols, from Iraq, Presentation, 34th International Geological Congress: Brisbane, Australia, August 5, 2012
Engelbrecht, J. P., Jayanty, R., Casuccio, G. (2012). A multidisciplinary analytical approach to understanding airborne mineral dusts, Poster presentation, Ed@80, International Conference on Loess Research, Tribute to Edward Derbyshire: Novi Sad, Serbia, September 27, 2012
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Jayanty, R., Casuccio, G., Gertler, A. W. (2012). Understanding mineral dusts from the Middle East, Paper presented: American Geophysical Union Fall Meeting: San Francisco, CA, December 3, 2012
Engelbrecht, J. P., Menendez, I., Derbyshire, E. (2012). Characterizing aerosols from PM2.5 filters collected on Gran Canaria, Spain, Poster presentation, Ed@80, International Conference on Loess Research, Tribute to Edward Derbyshire: Novi Sad, Serbia, September 27, 2012
Moosmüller, H., Aiken, A., Dubey, M. K., Frey, G., Garro, B., Engelbrecht, J. P. (2012). Optical Properties of Hematite and Fine Desert Dust Aerosols, 31th Annual Conference of the American Association for Aerosol Research: Minneapolis, MN, October 8, 2012
Moosmüller, H., Aiken, A., Dubey, M. K., Frey, G., Garro, B., Engelbrecht, J. P. (2012). Laboratory Measurement of the Optical Properties of Hematite and Desert Dust Aerosols to Assess Their Climate Forcing, AGU Fall Meeting: San Francisco, CA, December 3, 2012
Moosmüller, H., Engelbrecht, J. P., Skiba, M., Frey, G., Chakrabarty, R. K., Arnott, W. P. (2012). Single Scattering Albedo of Fine Mineral Dust Aerosols Controlled by Iron Concentration, Aerosol and Atmospheric Optics: Visibility and Air Pollution, Air & Waste Management Association: Whitefish, MT, September 24, 2012
Moosmüller, H., Skiba, M., Frey, G., Chakrabarty, R. K., Arnott, W. P., Engelbrecht, J. P. (2012). Single Scattering Albedo of Fine Mineral Dust Aerosols Controlled by Iron Concentration, J. Geophys. Res., 117, (D11210), Online, doi: 10.1029//2011JD016909

2011

Engelbrecht, J. P. (2011). Enhanced Particulate Matter Surveillance Program Phase II - Data Mining. Data Analysis, To Assess Air Pollutant Sources in Iraq, Final report prepared for US Army Public Health Command (USAPHC), Aberdeen Proving Ground, Maryland, September, 2010.
Engelbrecht, J. P., Jayanty, J. (2011). Assessing Dust Sources by Positive Matrix Factorization (PMF) of Chemical Results [poster presentation], First International Workshop on the Long-Range Transport and Impacts of African Dust on the Americas: San Juan, Puerto Rico, October 6, 2011-October 9, 2011
Engelbrecht, J. P., Jayanty, J., Casuccio, G. (2011). A Multidisciplinary Analytical Approach to Understanding Airborne Mineral Dusts [poster presentation], First International Workshop on the Long-Range Transport and Impacts of African Dust on the Americas: San Juan, Puerto Rico, October 6, 2011-October 9, 2011
Engelbrecht, J. P., R.K.M. Jayanty (2011). Characterizing Sources of Airborne Mineral Dust in Iraq, Goldschmidt 2011: Prague, Czech Republic, August 14, 2011-August 19, 2011
Engelbrecht, J. P., Kavouras, I. G., Shafer, D. S., Campbell, D. E., Campbell, S. A., McCurdy, G. D., Kohl, S. D., Nikolich, G., Sheetz, L. H., Gertler, A. W. (2011). Twelve Months of Air Quality Monitoring at Ash Meadows National Wildlife Refuge, Southwestern Rural Nevada, and U.S.A., Final report submitted to Nevada Site Office, National Nuclear Security Administration, U.S. Department of Energy, Las Vegas, NV. August, 2011.
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Gertler, A. W., R.K.M. Jayanty, Casuccio, G. (2011). A Multidisciplinary Approach to Understanding Mineral Dusts from the Middle East, 9th International Conference on Military Geosciences: Las Vegas, NV, June 20, 2011-June 24, 2011
Engelbrecht, J. P., Menéndez, I., Derbyshire, E. (2011). Charactering Aerosols from PM2.5 Filters Collected on Gran Canaria, Spain [poster presentation], First International Workshop on the Long-Range Transport and Impacts of African Dust on the Americas: San Juan, Puerto Rico, October 6, 2011-October 9, 2011
Gillies, J. A., Etyemezian, V. R., Kuhns, H. D., Engelbrecht, J. P., Moosmüller, H., Zhu, D., Nikolich, G., Shaw, W., Berg, L., Pekour, M., Clapton, S., Chapman, E. (2011). Characterizing and Quantifying Emissions and Transport of Fugitive Dust Emissions Due to Department of Defense Activities [poster presentation], Partners in Environmental Technology Technical Symposium and Workshop: Washington, DC, November 29, 2011-December 1, 2011
Moosmüller, H., Engelbrecht, J. P., Arnott, W. P., Frey, G., Chakrabarty, R. K., Skiba, M. (2011). Single Scattering Albedo of Fine Mineral Dust Aerosols Controlled by Iron Concentration, First International Workshop on the Long-Range Transport and Impacts of African Dust on the Americas: San Juan, Puerto Rico, October 6, 2011-October 7, 2011
Moosmüller, H., Engelbrecht, J. P., Chakrabarty, R. K., Arnott, W. P. (2011). Laboratory Aerosol Characterization and More, NASA GLORY Mission Science Team Meeting: NASA Goddard Institute for Space Studies (GISS), New York, NY, August 10, 2011-August 12, 2011

2010

Engelbrecht, J. P. (2010). Assessing Dust Sources by Positive Matrix Factorization (PMF), 13th Annual Force Health Protection Conference: Phoenix, AZ, August 7, 2010-August 13, 2010
Engelbrecht, J. P. (2010). Identifying Dust Sources by Positive Matrix Factorization (PMF), European Geosciences Union (EGU): Vienna, Austria, May 2, 2010-May 7, 2010
Engelbrecht, J. P., Derbyshire, E. (2010). Airborne Mineral Dust, Elements, 6, (4), 241-246
Gillies, J. A., Etyemezian, V. R., Kuhns, H. D., McAlpine, J. D., King, J., Uppapalli, S., Nikolich, G., Engelbrecht, J. P. (2010). Dust Emissions Created by Low-Level Rotary-Winged Aircraft Flight over Desert Surfaces, Atmospheric Environment, 44, (8), 1043-1053
Kuhns, H. D., Gillies, J. A., Etyemezian, V. R., Nikolich, G., King, J., Zhu, D., Uppapalli, S., Engelbrecht, J. P., Kohl, S. D. (2010). Effect of Soil Type and Momentum on Unpaved Road Particulate Matter Emissions from Wheeled and Tracked Vehicles, Aerosol Science and Technology, 44, 193-202

2009

Engelbrecht, J. P. (2009). Application of Analytical Techniques for Environmental and Geochemical Studies, GEOANALYSIS 2009: Champagne Sports Resort, South Africa, September 7, 2009-September 11, 2009
Engelbrecht, J. P., Gertler, A. W., Van Curen, R. (2009). Lake Tahoe Source Attribution Study (LTSAS): Receptor Modeling Study to Determine the Sources of Observed Ambient Particulate Matter in the Lake Tahoe Basin, Final report submitted, Jonathan Long, (Tahoe Research Program Manager, USDA Forest Service), December, 2009.
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Gertler, A. W., Casuccio, G., Jayanty, J. (2009). A Multidisciplinary Approach to Understanding Mineral Dusts from the Middle East, and Their Potential Impact on Human Health, 7th International Conference on Air Quality Science and Application: Istanbul, Turkey, March 24, 2009-March 27, 2009
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Jayanty, R. K., Casuccio, M., Gertler, A. W. (2009). Characterizing Mineral Dusts and Other Aerosols from the Middle East - Part 2: Grab Samples and Re-suspensions, Inhalation Toxicology, 21, (4), 327-336
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Jayanty, R. K., Casuccio, M., Gertler, A. W. (2009). Characterizing Mineral Dusts and Other Aerosols from the Middle East - Part 1: Ambient Aerosols, Inhalation Toxicology, 21, (4), 297-326
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Jayanty, R. K., Casuccio, G. S., Gertler, A. W. (2009). Characterizing Mineral Dusts and Other Aerosols from the Middle East-Part 1: Ambient Sampling, Inhal Toxicol, 21, (4), 297-326
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Jayanty, R. K., Casuccio, G. S., Gertler, A. W. (2009). Characterizing Mineral Dusts and Other Aerosols from the Middle East-Part 2: Grab Samples and Re-Suspensions, Inhal Toxicol, 21, (4), 327-336
Menéndez, I., Derbyshire, E., Engelbrecht, J. P., Von Suchodoletz, H., Zöller, L., Dorta, P., Carrillo, T., Rodriguez de Castro, F. (2009). Saharan Dust and Aerosols on the Canary Islands: Past and Present, Eds. Cheng, M., Liu, W., In Airborne Particulates, 39-80, NOVA Publishers Inc.: New York, NY
Menendez, I., Derbyshire, E., Engelbrecht, J. P., Von Suchodoletz, L., Zoller, P., Dorta Carrillo, T., Rodriguez de Castro, F. (2009). Saharan dust and aerosols on the Canary Islands: past and present, Eds. Cheng, M., Liu, W., In Airborne Particulates, 39-80, NOVA Publishers Inc.: New York

2008

Banta, J. R., McConnell, J. R., Edwards, R., Engelbrecht, J. P. (2008). Delineation of Carbonate Dust, Aluminous Dust, and Sea Salt Deposition in a Greenland Glaciochemical Array Using Positive Matrix Factorization, Geochem. Geophys. Geosyst., 9, (7), Q07013, doi: 10.1029/2007GC001908
Engelbrecht, J. P., Kavouras, I. G., Campbell, D. E., Campbell, S. A., Kohl, S. D., Shafer, D. S. (2008). Yucca Mountain Environmental Monitoring Systems Initiative, Air Quality Scoping Study for Caliente, Lincoln County, Nevada, Letter report submitted to Nevada site office, National Nuclear Security Administration, U.S. Department of Energy, August, 2008.
Engelbrecht, J. P., Kavouras, I. G., Campbell, D. E., Campbell, S. A., Kohl, S. D., Shafer, D. S. (2008). Yucca Mountain Environmental Monitoring Systems Initiative, Air Quality Scoping Study for Pahranagat National Wildlife Refuge, Lincoln County, Nevada, Letter report submitted to Nevada site office, National Nuclear Security Administration, U.S. Department of Energy, August, 2008.
Engelbrecht, J. P., Kavouras, I. G., Campbell, D. E., Campbell, S. A., Kohl, S. D., Shafer, D. S. (2008). Yucca Mountain Environmental Monitoring Systems Initiative, Air Quality Scoping Study for Crater Flat, Nye County, Nevada, Letter report submitted to Nevada site office, National Nuclear Security Administration, U.S. Department of Energy, August, 2008.
Engelbrecht, J. P., Kavouras, I. G., Campbell, D. E., Campbell, S. A., Kohl, S. D., Shafer, D. S. (2008). Yucca Mountain Environmental Monitoring Systems Initiative, Air Quality Scoping Study for Tonopah Airport, Nye County, Nevada, Letter report submitted to Nevada site office, National Nuclear Security Administration, U.S. Department of Energy, August, 2008.
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Gertler, A. W. (2008). Enhanced Particulate Matter Surveillance Program: A Multidisciplinary Approach To Understanding Mineral Dusts from the Middle East. Goldschmidt Conference Abstracts 2008, Geochimica et Cosmochimica Acta, 72, A243
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Gertler, A. W. (2008). Department of Defense Enhanced Particulate Matter Surveillance Program (EPMSP), Final report prepared for Enhanced Particulate Matter Surveillance Sub-Group, Particulate Matter Working Group, Deputy Assistant Secretary of Defense for Force Health Promotion and Readiness
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Gertler, A. W. (2008). Chemistry and Individual Particle Characteristics of Aerosols from the Middle East, 33rd International Geological Congress: Oslo, Norway, August 6, 2008-August 14, 2008
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Gertler, A. W. (2008). Enhanced Particulate Matter Surveillance Program: A Multidisciplinary Approach To Understanding Mineral Dusts from the Middle East. Goldschmidt Conference Abstracts 2008, Goldschmidt 2008: Vancouver, Canada, July 13, 2008-July 18, 2008
Fujita, E. M., Campbell, D. E., Engelbrecht, J. P., Zielinska, B. K. (2008). Characterization of Fine Particle Mass Using Particle-Phase Organic Compounds as Tracer, Draft final report prepared for Pat Brewer (VISTAS Technical Coordinator) and John Hornback (SESARM Executive Director), July, 2008.
Gillies, J. A., McDonald, E. V., Engelbrecht, J. P., Gertler, A. W. (2008). Chemistry and Individual Particle Characteristics of Aerosols from the Middle East, 11th Annual Force Health Protection Conference: Albuquerque, NM, August 9, 2008-August 15, 2008

2007

Engelbrecht, J. P., Kavouras, I. G., Campbell, D. E., Campbell, S. A., Kohl, S. D., Shafer, D. S. (2007). Yucca Mountain Environmental Monitoring Systems Initiative, Air Quality Scoping Study for Rachel, Nevada, Letter report submitted to Nevada site office, National Nuclear Security Administration, U.S. Department of Energy, April, 2007.
Engelbrecht, J. P., Kavouras, I. G., Campbell, D. E., Campbell, S. A., Kohl, S. D., Shafer, D. S. (2007). Yucca Mountain Environmental Monitoring Systems Initiative, Air Quality Scoping Study for Ash Meadows National Wildlife Refuge, Nevada, Letter report submitted to Nevada site office, National Nuclear Security Administration, U.S. Department of Energy, April, 2007.
Engelbrecht, J. P., Kavouras, I. G., Campbell, D. E., Campbell, S. A., Kohl, S. D., Shafer, D. S. (2007). Yucca Mountain Environmental Monitoring Systems Initiative, Air Quality Scoping Study for Sarcobatus Flat, Nevada, Letter report submitted to Nevada site office, National Nuclear Security Administration, U.S. Department of Energy, April, 2007.
Engelbrecht, J. P., Kavouras, I. G., Campbell, D. E., Campbell, S. A., Kohl, S. D., Shafer, D. S. (2007). Yucca Mountain Environmental Monitoring Systems Initiative, Air Quality Scoping Study for Beatty, Nevada, Letter report submitted to Nevada site office, National Nuclear Security Administration, U.S. Department of Energy, April, 2007.
Engelbrecht, J. P., McDonald, E. V., Gillies, J. A., Gertler, A. W., Skiba, M. (2007). Enhanced Particulate Matter Surveillance Program, 10th Annual Force Health Protection Conference: Louisville, KY, August 5, 2007-August 10, 2007
Engelbrecht, J. P., Moosmüller, H., Arnott, W. P., Gillies, J. A., Skiba, M. (2007). Mineralogy and Optical Properties of Re-suspended Desert Dust, International Union of Geodesy and Geophysics (IUGG XXIV) Conference: Perugia, Italy, July 2, 2007-July 13, 2007
Gillies, J. A., Etyemezian, V. R., Kuhns, H. D., Engelbrecht, J. P., Uppapalli, S., Nikolich, G. (2007). Dust emissions caused by backblast from Department of Defense artillery testing, J. Air & Waste Manage. Assoc., 57, 551-560, doi: 10.3155/1047-3289.57.5.551
Gillies, J. A., Kuhns, H. D., Engelbrecht, J. P., Uppapalli, S., Etyemezian, V. R., Nikolich, G. (2007). Particulate Emissions from U.S. Department of Defense Artillery Backblast Testing, J. Air & Waste Manage. Assoc., 57, (5), 551-560

2005

Engelbrecht, J. P., Brown, T. J., Gertler, A. W. (2005). Fort Ord Review of and Comments on Air Quality Documentation, Report prepared for Denise Duffy and Associates, 20 pp., June, 2005.
Engelbrecht, J. P., Coulombe, W. (2005). Hualapai Department of Natural Resources, PM10 and PM2.5 Gravimetric and PM2.5 Speciation Results from the Hualapai Indian Reservation, Air Quality Monitoring Program, 39 pp. including Appendices, October, 2005.
Engelbrecht, J. P., Gertler, A. W., Brown, T. J. (2005). Fort Ord Review of and Comments on Air Quality Documentation, Report prepared for Denise Duffy and Associates, 21 pp. Monterey, CA, May 2005.
Engelbrecht, J. P., Kuhns, H. D., Green, M. C., Tropp, R. J., Watson, J. G. (2005). MANE-VU, Source Apportionment Analysis of Air Quality Monitoring Data: Phase II. Final Report, 71 pp., plus Appendices, March, 2005.
Engelbrecht, J. P., Pilliere, H. (2005). Quantitative Mineralogical Analysis of Re-suspended Dusts in Aerosol Samples by X-ray Diffraction, International Association of Meteorology and Atmospheric Sciences (IAMAS 2005): Beijing, China, August 2, 2005-August 11, 2005
Engelbrecht, J. P., Tropp, R. J., Kuhns, H. D., Green, M. C., Watson, J. G. (2005). Positive Matrix Factorization (PMF) and Chemical Mass Balance (CMB) Receptor Modeling Applied to IMPROVE Data Sets from the Northeastern USA, American Association for Aerosol Research (AAAR) International Specialty Conference: Atlanta, GA, February 8, 2005
Shafer, D. S., Martin, C., Pohlmann, K. F., Russell, C. E., Ye, M., Engelbrecht, J. P., Minor, T. B., Bishop, L. (2005). Establishing baseline environmental conditions for the proposed Yucca mountain repository, Nevada, U.S.A.

2004

Chow, J. C., Watson, J. G., Kuhns, H. D., Etyemezian, V. R., Lowenthal, D. H., Crow, D., Kohl, S. D., Engelbrecht, J. P., Green, M. C. (2004). Source Profiles for Industrial, Mobile, and Area Sources in the Big Bend Regional Aerosol Visibility and Observational (BRAVO) Study, Chemosphere, 54, (2), 185-208
Engelbrecht, J. P. (2004). Reno-Sparks Indian Colony (RSIC) Quality Assurance Project Plan (QAPP) for Met One BAM-1020, PM10 Monitor, October 22, 2004
Engelbrecht, J. P., Gertler, A. W. (2004). Developing Chemical Source Profiles for Greater Cairo, Using Positive Matrix Factorization (PMF) Receptor Modeling, International Union of Air Pollution Prevention and Environmental Protection Associations (IUAPPA), 13th Clean Air and Environmental Protection Congress and Exhibition: London, UK, August 22, 2004-August 27, 2004
Engelbrecht, J. P., Gertler, A. W. (2004). Sources of Ambient PM in the Greater Cairo Area: Application of Positive Matrix Factorization Receptor Modeling, Air and Waste Management Association (A&WMA) Meeting 2004: Indianapolis, IN, June 22, 2004-June 25, 2004
Engelbrecht, J. P., Kohl, S. D. (2004). Pinal County Source Apportionment Study, Report prepared for Pinal County Air Quality Control District (PCAQCD), May 27, 2004.
Engelbrecht, J. P., Tropp, R. J. (2004). A PCA and PMF Study on Speciation Data from Big Bend National Park, Air and Waste Management Association (A&WMA) Symposium on Air Quality Measurement Methods and Technology: Research Triangle Park, NC, April 22, 2004
Engelbrecht, J. P., Tropp, R. J., Kuhns, H. D., Green, M. C., Watson, J. G. (2004). Source Apportionment Analysis of Air Quality Monitoring Data: Phase II, Final Report to Mid-Atlantic/Northeast Visibility Union and Midwest Regional Planning Organization, April 2004.
Engelbrecht, J. P., Tropp, R. J., Kuhns, H. D., Watson, J. G. (2004). Principal Components Analysis (PCA) of Chemical Data from Four IMPROVE Sites in the Northeastern USA, Air and Waste Management Association (A&WMA) Meeting: Indianapolis, IN, June 22, 2004-June 25, 2004
Labban, R., Veranth, J. M., Chow, J. C., Engelbrecht, J. P., Watson, J. G. (2004). Size and Geographical Variation in PM1.0, PM2.5, and PM10: Source Profiles from Soils in the Western United States, Water Air and Soil Pollution, 157, (1-4), 13-31
Tropp, R. J., Engelbrecht, J. P., Kohl, S. D., Lowenthal, D. H., DuBois, D. W., Chow, J. C., Watson, J. G., Countess, R. J., Countess, S. J., Michel, E. L. (2004). Assessment of PM2.5 Chemical Speciation Results for Texas, Air and Waste Management Association (A&WMA) Symposium on Air Quality Measurement Methods and Technology: Research Triangle Park, NC, April 22, 2004
Veranth, J. M., Perry, K., Pardyjak, E., Labban, R., Yin, F., Veranth, M., Watson, J. G., Chow, J. C., Etyemezian, V. R., Kohl, S. D., Engelbrecht, J. P. (2004). Characterization of PM2.5 Dust Emissions from Training/Testing Range Operations-CP1190, Annual Report - December 2004. Prepared for DoD/DoE/EPA Strategic Environmental Research and Development Program, Arlington, VA, by University of Utah, Salt Lake City, UT

2003

Engelbrecht, J. P. (2003). "Wallula PM10 Non-attainment Area Source Apportionment Study", Review of report to the Washington State Department of Ecology, February 14, 2003.
Engelbrecht, J. P., Kuhns, H. D., Tropp, R. J. (2003). Source Apportionment Analysis of Air Quality Monitoring Data: Phase II, Report prepared for the Mid-Atlantic/Northeast Visibility Union and Midwest Regional Planning Organization, December 2003.
Engelbrecht, J. P., Swanepoel, L. (2003). Ambient Particulate Concentration Trends Measured in Randburg, South Africa, Air and Waste Management Association (A&WMA) Meeting: San Diego, CA, June 22, 2003-June 26, 2003
Engelbrecht, J. P., Tropp, R. J., Kuhns, H. D., Green, M. C. (2003). Marama/MANE-VU Phase II Data Analysis, Marama/MANE-VU Data Analysis Workshop: Windsor Locks, CT, June 18, 2003-June 19, 2003
Engelbrecht, J. P., Tropp, R. J., Kuhns, H. D., Green, M. C. (2003). Source Apportionment Analysis of Air Quality Monitoring Data: Phase II, Marama/MANE-VU Science Meeting: Baltimore, MD, January 22, 2003

2002

Chow, J. C., Engelbrecht, J. P., Freeman, N. C., Hashim, J. H., Jantunen, M., Michaud, J. P., Saenz de Tajeda, S., Watson, J. G., Wei, F., Wilson, W. E., Yasuno, M., Zhu, T. (2002). Exposure measurements, Chemosphere, 49, (9), 873-901
Chow, J. C., Engelbrecht, J. P., Freeman, N., Hashim, J., Jantunen, M., Michaud, J., de Tejada, S., Watson, J. G., Wei, F., Wilson, W., Yasuno, M., Zhu, T. (2002). Chapter one: exposure measurements, Chemosphere, 49, (9), 873-901
Chow, J. C., Engelbrecht, J. P., Watson, J. G., Wilson, W. E., Frank, N. H., Zhu, T. (2002). Designing monitoring networks to represent outdoor human exposure, Chemosphere, 49, 961-978
Chow, J. C., Engelbrecht, J. P., Watson, J. G., Wilson, W., Frank, N., Zhu, T. (2002). Designing monitoring networks to represent outdoor human exposure, Chemosphere, 49, (9), 961-978
Chow, J. C., Watson, J. G., Crow, D., Kohl, S. D., Kuhns, H. D., Etyemezian, V. R., Engelbrecht, J. P. (2002). Source Profiles for the Big Bend Regional Aerosol Visibility and Observational (BRAVO) Source Characterization Study, Draft Report
Chow, J. C., Watson, J. G., Crow, D., Kohl, S. D., Kuhns, H. D., Etyemezian, V. R., Engelbrecht, J. P. (2002). Source Apportionment for the Big Bend Regional Aerosol Visibility and Observational (BRAVO) Source Characterization Study, Prepared for the Cooperative Institute for Atmospheric Sciences and Terrestrial Applications (CIASTA) Program c/o NOAA, Las Vegas, NV, by Desert Research Institute, February, 2002
Chow, J. C., Watson, J. G., Engelbrecht, J. P., Kohl, S. D. (2002). Review of Activities in the DRI's Environmental Analysis Facility, California Desert Air Working Group (CDAWG) Meeting: Reno, NV, March 13, 2002-March 15, 2002
Coulombe, W., Freeman, D., Engelbrecht, J. P., Havatone, C. (2002). Air Quality Monitoring for the Hualapai, 10th Annual Region IX Tribal EPA Conference: Sparks, NV
Engelbrecht, J. P., Kuhns, H. D., Tropp, R. J. (2002). Source Apportionment Analysis of Air Quality Monitoring Data: Phase II, Report prepared for the Mid-Atlantic/Northeast Vises Union and Midwest Regional Planning Organization. December 2002.
Engelbrecht, J. P., Swanepoel, L., Chow, J. C., Watson, J. G., Egami, R. T. (2002). The comparison of source contributions from residential coal and low-smoke fuels, using CMB modeling, in South Africa, Environ. Science and Policy, 5, (2), 157-167
Engelbrecht, J. P., Swanepoel, L., Chow, J. C., Watson, J. G., Egami, R. T. (2002). The comparison of source contributions from residential coal and low-smoke fuels, using CMB modeling, in South Africa, Environmental Science & Policy, 5, (2), 157-167
Veranth, J., Seshadri, G., Satya, S., Watson, J. G., Chow, J. C., Etyemezian, V. R., Engelbrecht, J. P., Kohl, S. D. (2002). Characterization of PM2.5 Dust Emissions from Training/Testing Range Operations - Project CP1190. Annual Report - December 2001, Prepared for DoD/DoE/EPA Strategic Environmental Research and Development Program, Arlington, VA, by University of Utah, Salt Lake City, UT, and Desert Research Institute, Reno, NV, February 2002
Watson, J. G., Zhu, T., Chow, J. C., Engelbrecht, J. P., Fujita, E. M., Wilson, W. E. (2002). Receptor Modeling Application Framework for Particle Source Apportionment, Chemosphere, 49, (9), 1093-1136
Wilson, W. E., Chow, J. C., Claiborn, C., Fusheng, W., Engelbrecht, J. P., Watson, J. G. (2002). Monitoring of Particulate Matter Outdoors, Chemosphere, 49, (9), 1009-1043

2001

Engelbrecht, J. P., Swanepoel, L., Chow, J. C., Watson, J. G., Egami, R. T. (2001). PM2.5 and PM10 Concentrations from the Qalabotjha Low-Smoke Fuels Macro-Scale Experiment in South Africa, Environmental Monitoring and Assessment, 61, 1-15

2000

Engelbrecht, J. P. (2000). On-stream XRD Analysis for Process Control in the Industrial Minerals Industry, Eds. Rammlmair, D., Mederer, J., Oberthür, T., Heimann, R. B., Pentinghaus, H., In Applied Mineralogy in Research, Economy, Technology, Ecology and Culture, 285-288, A.A. Balkema: Rotterdam, The Netherlands
Engelbrecht, J. P. (2000). Visits to CF Industries, IMC Agrico, Florida Institute of Phosphate Research and the Desert Research Institute As Well As the Attendance of the SGOMSEC Workshop in Hawaii., Mintek Technical Memorandum No. 14684, 7 pp.
Engelbrecht, J. P. (2000). Four Consecutive Years of TSP, PM10 and PM2.5 Integrated Aerosol Monitoring at Mintek in Randburg, National Association for Clean Air, Annual Conference 2000: Mount Amanzi, Hartebeespoort, South Africa, September 14, 2000-September 15, 2000
Engelbrecht, J. P. (2000). On-stream XRD Analysis for Process Control in the Industrial Minerals Industry, 7th International Congress on Applied Mineralogy (ICAM2000): Gttingen, Germany
Engelbrecht, J. P., Swanepoel, L. (2000). Ambient Air Quality Trends from Mintek's Minpolmon Aerosol Monitoring Sites, for 1996-99 - A Review, Mintek Technical Memorandum No. 14690, 21 pp.
Engelbrecht, J. P., Swanepoel, L., Zunckel, M., Chow, J. C., Watson, J. G., Egami, R. T. (2000). Modelling PM10 Aerosol Data from the Qalabotjha Low-Smoke Fuels Macro-Scale Experiment in South Africa, Ecological Modelling, 127, (2-3), 235-244

1999

Engelbrecht, J. P. (1999). The Quantification of Air Pollution Contributions by Industrial and Other Sources, Energy & Environment Development Conference: Port Elizabeth, South Africa
Engelbrecht, J. P., Clark, W. (1999). The Midfox Analyses of Fifteen Beneficiation Plant Products from Fertinal's San Juan de la Costa Phosphate Rock Mining Operations Near La Paz, Mexico, Mintek Technical Memorandum No. 14672, 168 pp.
Engelbrecht, J. P., Van den Heever, P. C., De Bruyn, S. W. (1999). The On-stream X-ray Diffractometric Analysis of Phosphate-rock-bearing Slurries for Process Control on a Beneficiation Plant, Eds. Zhang, P., El-Shall, H., Wiegel, R., In Beneficiation of Phosphates: Advances in Research and Practice, 237-246, Society for Mining, Metallurgy, and Exploration, Inc.: Littleton, CO

1998

Engelbrecht, J. P. (1998). The Attendance of the "91st Annual Meeting of the Air and Waste Management Association" in San Diego As Well As a Visit to Fertinal's Phosphate Mining Operations near La Paz, Mexico, Mintek Technical Memorandum No. 14661, 11 pp.
Engelbrecht, J. P. (1998). On-stream X-ray Diffraction Analysis of Phosphate Rock-Bearing Slurries in Florida: A Case Study Towards Process Control, Beneficiation of Phosphates II, United Engineering Foundation (UEF) Conference: Palm Coast, FL, December 6, 1998-December 11, 1998
Engelbrecht, J. P., Swanepoel, L. (1998). Source Apportionment of Domestic Coal and Low-Smoke Fuel Combustion in Qalabotjha, South Africa, Air and Waste Management Association (A&WMA) Meeting: San Diego, CA, June 14, 1998-June 18, 1998
Engelbrecht, J. P., Swanepoel, L. (1998). Modelling PM10 Gravimetric Data from the Qalabotjha Low-Smoke Fuels Macro-Scale Experiment in South Africa, International Union of Air Pollution Prevention and Environmental Protection Associations (IUAPPA), 11th World Clean Air and Environment Congress: Durban, South Africa, September 13, 1998-September 18, 1998
Engelbrecht, J. P., Swanepoel, L. (1998). Source Apportionment of Domestic Coal and Low-Smoke Fuel Combustion in Qalabotjha, South Africa, International Union of Air Pollution Prevention and Environmental Protection Associations (IUAPPA), 11th World Clean Air and Environment Congress: Durban, South Africa, September 13, 1998-September 18, 1998
Engelbrecht, J. P., Van den Heever, P. C., De Bruyn, S. W. (1998). On-stream X-ray Diffraction Analysis of Phosphate Rock-Bearing Slurries in Florida: A Case Study Towards Process Control, Process Control and Quality, 11, (1), 59-70

1997

Engelbrecht, J. P. (1997). The Attendance of "Analysing Risk" and "Benefit-cost Analysis" Courses, As Well As Visits to Various Clients in the USA and Mexico, Mintek Technical Memorandum No. 14642, 11 pp.
Engelbrecht, J. P., Reddy, V. S. (1997). The On-stream X-ray Diffraction Analyses of Halite and Schoenite in Saturated Brine Suspensions, Mintek Technical Memorandum No. 14640, 24 pp.
Engelbrecht, J. P., Swanepoel, L. (1997). Aerosol Monitoring and Source Apportionment in Qalabotjha, Free State, South Africa, Mintek Confidential Communication No. C2670M, 331 pp. (declassified)

1996

Engelbrecht, J. P. (1996). South Africa: Air Quality Measurements in the Vaal Triangle, Mining and Environmental Research Network (MERN), Bulletin No. 9, p. 46.
Engelbrecht, J. P., Reddy, V. S., Swanepoel, L., Mostert, J. C. (1996). Airborne Particulate Matter Monitoring and Source Apportionment in Olifantsfontein, Mintek Confidential Communication No. C2391M, 18 pp. (declassified)
Engelbrecht, J. P., Reddy, V. S., Swanepoel, L., Mostert, J. C. (1996). Airborne Particulate Matter Monitoring and Source Apportionment in the Vaal Triangle, Mintek Confidential Communication No. C2390M, 135 pp. (declassified Mintek Special Publication no. 17, 1998)
Engelbrecht, J. P., Reddy, V. S., Swanepoel, L., Mostert, J. C. (1996). Results of a Source Apportionment Study at Valencia Park and Khler Industries, in Nelspruit, Mintek Confidential Communication No. C2367M, 21 pp. (declassified)
Engelbrecht, J. P., Wells, R. B. (1996). Source Apportionment, Eds. Gore, B. J., Surridge, A. D., Tosen, G. R., Turner, C. R., Walmsley, R. D., In Air Pollution and its Impacts on the South African Highveld, 16-17, Environmental Scientific Association: Cleveland, South Africa

1995

Engelbrecht, J. P. (1995). Report to the Florida Institute of Phosphate Research, the Visit to Dexco, As Well As Visits to the Phosphate Rock Producers in the USA, Jordan and Israel, Mintek Technical Memorandum No. 14616, 15 pp.
Engelbrecht, J. P. (1995). The Contribution of Coal Combustion Processes to the Poor Air Quality in the Vaal Triangle, Council of Mining and Metallurgical Institutions Colloquium, Coal Processing, Utilization and Control of Emissions: Mintek, Randburg, South Africa, September 21, 1995-September 22, 1995
Engelbrecht, J. P. (1995). The On-Stream Analysis of Phosphate Rock by X-Ray Diffraction, AIME/AIChE/AIPG/FIPR Tenth Annual Regional Phosphate Conference: Lakeland, FL
Engelbrecht, J. P., De Bruyn, S. W., Van den Heever, P. C. (1995). The On-stream X-ray Diffraction Analyses of Phosphate Rock Slurries at the IMC-Agrico Four Corners Plant, Florida Institute of Phosphate Research: Bartow, FL, FIPR Rept. 04-051-122, 67 pp.
Engelbrecht, J. P., De Bruyn, S. W., Van den Heever, P. C. (1995). Midfox - The On-stream X-ray Diffraction Analyses of Phosphate Rock Slurries at the IMC Agrico Four Corners Plant, Mintek Confidential Communication No. C2292M, 59 pp.
Engelbrecht, J. P., Reddy, V. S., Swanepoel, L., Mostert, J. C. (1995). Results on the CMB7 Receptor Modelling in the Vaal Triangle, Proceedings of the National Association for Clean Air (NACA) Annual Conference: Durban, South Africa, November 22, 1995-November 24, 1995
Engelbrecht, J. P., Van den Heever, P. C. (1995). The Attendance of the Tenth Annual Regional Phosphate Conference and the Demonstration of the Midfox Analyser in Florida, Mintek Technical Memorandum No. 14620, 10 pp.

1994

Engelbrecht, J. P. (1994). The On-Stream X-Ray Diffraction Analysis of Phosphate Rock Slurries, Council of Mining and Metallurgical Institutions (CMMI) XVth Congress Southern Africa: Pilanesberg, South Africa
Engelbrecht, J. P., de Bruyn, S. W. (1994). The On-Stream X-Ray Diffraction Analyses of Slurried Rock-Phosphate Samples from the IMC/Agrico Kingsford Plant, Florida, USA, 13 pp., Mintek Technical Memorandum No. 14561
Engelbrecht, J. P., de Bruyn, S. W. (1994). The On-Stream X-Ray Diffraction Analyses of Slurried Rock-Phosphate Samples from the Jordan Phosphate Mines, Shidiyah Deposit, 13 pp., Mintek Technical Memorandum No. 14562

1993

Engelbrecht, J. P. (1993). Chemical Source Profiles from the Vaal Triangle and Source Apportionment, National Association for Clean Air (NACA) Conference: Dikhololo Game Lodge, Brits, South Africa, November 11, 1993-November 12, 1993

1992

Engelbrecht, J. P. (1992). An Automated On-Stream XRD Analyzer for Process Control in the Phosphate Industry, 41st Annual Denver X-ray Conference: Colorado Springs, CO
Engelbrecht, J. P., Reddy, V. S. (1992). A Sampling System for Stack, Re-Suspended and Ambient Aerosol Samples, Proceedings of the National Association for Clean Air (NACA) Annual Conference: Vereeniging, South Africa, November 8, 1992-November 10, 1992

1991

Engelbrecht, J. P. (1991). The On-Stream X-Ray Analysis of Slurries for Process Control, Pacific International Congress on X-ray Analytical Methods (PICXAM): Honolulu, HI
Engelbrecht, J. P. (1991). The On-Stream X-Ray Analysis of Slurries for Process Control, International Committee on Applied Mineralogy (ICAM) Conference: Pretoria, South Africa

1990

Engelbrecht, J. P. (1990). Scanning-Electron-Microscope Analysis of Individual Particles in a Source-Apportionment Study of Atmospheric Pollution in the Vaal Triangle, International Union of Air Pollution Prevention Associations (IUAPPA) 1st Regional Conference: Pretoria, South Africa, October 24, 1990-October 26, 1990

1988

Engelbrecht, J. P. (1988). The Marico Hypabyssal Suite, and the Marginal Zone of the Bushveld Complex in the Marico District, Western Transvaal, South Africa, 16 pp., Inst. Geol. Res. Bushveld Complex: Pretoria, South Africa, Res. Rpt. 75
Engelbrecht, J. P. (1988). The Tectonic Setting of the Bushveld Complex in the Marico District, Western Transvaal, South Africa, 14 p., Inst. Geol. Res. Bushveld Complex: Pretoria, South Africa, Res. Rept. 74
Engelbrecht, J. P. (1988). The Metamorphic Aureole of the Bushveld Complex in the Marico District, Western Transvaal, South Africa, 22 p., Inst. Geol. Res. Bushveld Complex: Pretoria, South Africa, Res. Rept. 77
Engelbrecht, J. P. (1988). The Metamorphic Aureole of the Bushveld Complex in the Marico District, Western Transvaal, Geocongress: Durban, South Africa

1987

Engelbrecht, J. P. (1987). The Geology Along the River Section in the Vredefort Dome Area, Symposium on Crypto-explosions and Catastrophes in the Geological Record: Parys, South Africa
Engelbrecht, J. P. (1987). The Structural Setting of the Bushveld Complex in the Marico District, Indaba on the Tectonic Setting of Layered Intrusions: Pretoria, South Africa

1986

Engelbrecht, J. P. (1986). The Marico Hypabyssal Suite and the Marginal Zone of the Bushveld Complex, Geocongress: Johannesburg, South Africa

1984

Engelbrecht, J. P. (1984). The Chromites of the Bushveld Complex in the Nietverdiend Area, 30 p., Inst. Geol. Res. Bushveld Complex: Pretoria, South Africa, Res. Rept. 48

1983

Engelbrecht, J. P. (1983). The Chromites of the Bushveld Complex in the Nietverdiend Area, Bushveld Symposium: Pretoria, South Africa
Sharpe, M. R., Brits, R., Engelbrecht, J. P. (1983). Rare Earth and Trace Element Evidence Pertaining to the Petrogenesis of 2.3 GA Old Continental Andesite and Other Volcanic Rocks from the Transvaal Sequence, South Africa, 63 p., Inst. Geol. Res. Bushveld Complex: Pretoria, South Africa, Res. Rept. 40

Authors

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