Publications

Please email prof. Johnson for the most recent pdfs.

Ron C., William P. Johnson, 2020, Complementary Colloid and Collector Nanoscale Heterogeneity Explains Microparticle Retention Under Unfavorable Conditions, Environ. Sci. Nano, DOI: https://doi.org/10.1039/D0EN00815J.

Johnson William P., Pazmino E., Frederick L., Ron C., Chica A., 2020, Contaminant removal and precious metal recovery by lateral channel filtration in mining impacted alluvial floodplains, Frontiers in Water, 2:586698, https://doi.org/10.3389/frwa.2020.586698.

Wright Jacob, Shu Yang, William P. Johnson, Frank J. Black, James McVey, Austin Epler, Abigail F. Scott, Madelene P. Trentman, Alexandria R. Martin, Gaurav Pandey, Andrew M. Piskadlo, 2020, Temporal Correspondence of Selenium and Mercury Among Brine Shrimp and Water in Great Salt Lake, Utah, USA, Sci. Tot. Environ., 749, 141273, https://doi.org/10.1016/j.scitotenv.2020.141273.

Johnson W.P., 2020, Quantitative Linking of Nanoscale Interactions to Continuum-Scale Nanoparticle and Microplastic Transport in Environmental Granular Media, Environ. Sci. Technol. https://dx.doi.org/10.1021/acs.est.0c01172.

Johnson William P., Rasmuson Anna, Brock Erickson, Kurt VanNess, Cesar Ron, Diogo Bolster, Brett Peters, 2020, Anionic nanoparticle and microplastic non-exponential distributions from source scale with grain size in environmental granular media, Water Research, 116012, https://doi.org/10.1016/j.watres.2020.116012.

Ma H., Bolster C., Johnson, W.P., Li K., Pazmino E., Camacho K.M., Anselmo A.C., Mitragotri S., 2020, Coupled influences of particle shape, surface property and flow hydrodynamics on rod-shaped colloid transport in porous media, J. Colloid & Interface Science, Volume 577, 1 October 2020, Pages 471-480.

Rasmuson Anna , Brock Erickson, Mark Borchardt, Maureen Muldoon, William P. Johnson, 2019, Pathogen Prevalence in Fractured versus Granular Aquifers and the Role of Forward Flow Stagnation Zones on Pore Scale Delivery to Surfaces, Environ. Sci. & Technol., 54, 1, 137-145.

Yang Shu, William P. Johnson, Frank J. Black, Ryan Rowland, Christine Rumsey, Andrew Piskadlo, 2019, Response of density stratification, aquatic chemistry, and methylmercury to engineered and hydrologic forcings in an endorheic lake (Great Salt Lake, U.S.A.), Limnol. Oceanogr., 9999, 2019, 1-12.

Ron Cesar A., Mei Dong, Karen L. Wooley, William P. Johnson, 2019, Theory-Guided Targeted Delivery of Nano- and Micro-Particles in Advective Environmental Porous Media, Environ. Sci. Techol. Letters. 6, 10, 617-623, 10.1021/acs.estlett.9b00474.

VanNess Kurt, Anna Rasmuson, Cesar A. Ron, William P. Johnson, 2019, A Unified Theory for Colloid Transport: Predicting Attachment and Mobilization under Favorable and Unfavorable Conditions, Langmuir, 35 (27), 9061-9070, 10.1021/acs.langmuir.9b00911.

Ron Cesar, Kurt VanNess, Anna Rasmuson, William P. Johnson, 2019, How Nanoscale Surface Heterogeneity Impacts Transport of Nano- to Micro-Particles on Surfaces under Unfavorable Attachment Conditions, Environmental Science: Nano, 6, 1921 - 1931, 10.1039/C9EN00306A.

Frederick Logan, William P. Johnson, Thure Cerling, Diego Fernandez, James VanDerslice, 2019, Source Identification of Particulate Metals/Metalloids Deposited in the San Juan River Delta of Lake Powell, USA, 230, 128, Water, Air and Soil Pollution, https://doi.org/10.1007/s11270-019-4176-z.

Rasmuson Anna, Kurt VanNess, Cesar A. Ron, William P. Johnson, 2019, Hydrodynamic versus surface interaction impacts of roughness in closing the gap between favorable and unfavorable colloid transport conditions, Environ. Sci. Technol., 53 (5) 2450-2459, 10.1021/acs.est.8b06162

William Johnson, Huilian Ma, Anna Rasmuson, Kurt VanNess, Ke Li, Cesar Ron, Brock Erickson, 2018, Colloid Transport in Environmental Granular Porous Media: A Conceptual Description. Wiley Encyclopedia of Water: Science, Technology & Society.

William Johnson, Wayne Wurtsbaugh, Gary D. Belovsky, Bonnie K. Baxter, Frank Black, Cory Angeroth, Paul Jewell, Shu Yang, 2018, Geochemistry of Great Salt Lake, Wiley Encyclopedia of Water: Science, Technology & Society.

Johnson W.P, A. Rasmuson, M. Hilpert, and E. Pazmino, 2018, Why variant colloid transport behaviors emerge among identical individuals in porous media when colloid-surface repulsion exists. Environ. Sci. Technol., 52 (13), pp 7230-7239, DOI: 10.1021/acs.est.8b00811.

Frederick L., A. Brunelle, M. Morrison, P. Crespo, W.P. Johnson, 2017, Holocene Reconstruction of the Paleoclimate of the Ecuadorian Andean Páramo and assessment of the mid-Holocene warm/dry event in Tres Lagunas, Ecuador, in revision, Holocene.

Hilpert M.A. and W.P. Johnson, 2017, A binomial modeling approach for upscaling colloid transport under unfavorable attachment conditions: Emergent prediction of non-monotonic retention profiles, Water Resources Research, 54(1), https://doi.org./10.1002/2017WR021454.

Hilpert M., A. Rasmuson, W.P. Johnson, 2017, A Binomial Modeling Approach for Upscaling Colloid Transport under Unfavorable Conditions: Organic Prediction of Extended Tailing, Water Resources Research, 53 (7), 5626-5644. 10.1002/2016WR020123.

Valdes C., F.J. Black, B. Stringham, J.N. Collins, J.R. Goodman, H.J. Saxton, C.R. Mansfield, J.N. Schmidt, and W.P. Johnson, 2017, Total Mercury and Methylmercury Response in Water Sediment, and Biota to Destratification of the Great Salt Lake, Utah, USA, http://dx.doi.org/10.1021/acs.est.6b05790.

Rasmuson A., E. Pazmino, Assemi S., W.P. Johnson, 2017, The Contribution of Nanoscale Roughness to Heterogeneity: Closing the Gap between Unfavorable and Favorable Colloid Attachment Conditions, Environmental Science & Technology, 51 (4), pp 2151–2160, DOI 10.1021/acs.est.6b05911.

Hunt Randall J. and W.P. Johnson, 2016, Pathogen Transport in Groundwater Systems-Contrasts with Traditional Hydrogeological Approaches.  Hydrogeology Journal 46(40), 551-560, DOI 10.1007/s10040-016-1502-z.

Frederick, L., J. VanDerslice, M. Taddie, K. Malecki, J. Gregg, N. Faust, P Johnson, 2016, Determination of Regional and National Mechanisms for Arsenic MCL Exceedance across the United States using CART, Water Research, 91, 295-304.

Tasci T. O., Johnson W.P., Fernandez D.P., Manangon E., Gale* B.K., 2015, Particle Based Modeling of Electrical Field Flow Fractionation Systems, Chromatography, 2, 594-610; doi:10.3390/chromatography2040594.

Trauscht J., E. Pazmino, and W.P. Johnson, 2015, Prediction of Nanoparticle and Colloid Attachment on Unfavorable Mineral Surfaces Using Representative Discrete Heterogeneity, Langmuir, 31 (34), 9366–9378, DOI: 10.1021/acs.langmuir.5b02369.

Molnar Ian L., William P. Johnson, Jason I. Gerhard, and Denis M. O’Carroll, 2015, Predicting colloid transport through porous media: A critical review, Water Resources Research, 50^th anniversary special issue DOI: 10.1002/2015WR017318.

Johnson W.P., L.E. Frederick, M.R. Millington, D. Vala, B.K. Reese, D.R. Freedman, C.J. Stenten, J.S. Trauscht, C.E. Tingey, D.K. Solomon, D.P. Fernandez, G.J. Bowen, 2015, Potential impacts to perennial springs from tar sand mining, processing, and disposal on the Tavaputs Plateau, Utah, USA, Science of the Total Environment, 532, 20-30, DOI: 10.1016/j.scitotenv.2015.05.127.

Johnson W.P., Swanson Neil P., Brooks Black, Abigail Rudd, Greg Carling, Diego P. Fernandez, John Luft, Jim Van Leeuwen, Mark Marvin-DiPasquale, 2015, Total- and methyl-mercury concentrations and methylation rates across the freshwater to hypersaline continuum of the Great Salt Lake, Utah, Science of the Total Environment, 511, 489-500, DOI: 10.1016/j.scitotenv.2014.12.092/.

Tasci T.O., P. Johnson, D.P. Fernandez, E. Manangon, B.K. Gale, 2014, Circuit Modification of Electrical Field Flow Fractionation Systems for High Resolution Separations of Nanoparticles, J. Chromatography A, 1365, 164-172, DOI: 10.1016/j.chroma.2014.08.097.

Petersen, K. E., Manangon, E., Hood, J. L., Wickline, S. A., Fernandez, D. P., Johnson, W. P., & Gale, B. K. , 2014, A review of exosome separation techniques and characterization of B16-F10 mouse melanoma exosomes with AF4-UV-MALS-DLS-TEM. Analytical and Bioanalytical Chemistry. (IR #18879) DOI: 10.1007/s00216-014-8040-0

Pazmino E., Jacob Trauscht, and Johnson W.P., 2014, Release of Colloids from Primary Minimum Contact Under Unfavorable Conditions by Perturbations in Ionic Strength and Flow Rate, Environ. Sci. Technol., 48(16), 9227–9235, DOI: http://dx.doi.org/10.1021/es502503y.

Pazmino E.,Jacob Trauscht, Brittany Dame, and Johnson W.P., 2014, "Power-law size-distributed heterogeneity explains colloid retention on soda-lime glass in the presence of energy barriers,” Langmuir, 30(19), 5412�5421, http://dx.doi.org/10.1021/la501006p.

Tasci T. O.,W. P. Johnson, E. Manangon, D. P. Fernandez, B. K. Gale*,2013 "Biased Cyclical Electrical Field Flow Fractionation for Separation of Sub 50 nm Particles, Analytical Chemistry, 85, 11225-11232”.

W. P. Johnson, Mallory Millington, Logan Frederick, Kip Solomon, Diego Fernandez, Jacob Trauscht, 2013 "Hydrochemical Data from Perennial Springs in the PR Spring Area of the Southern Uinta Basin,”, PDF.

Tasci T. O., E. Manangon, D. P. Fernandez, W. P. Johnson, B. K. Gale, "Utilization of High Duty Cycle Voltage Waveforms for  High Resolution Electrical Field Flow Fractionation”, (in preparation).

*Johnson W.P, & Markus Hilpert, 2013, Upscaling Colloid Transport & Retention under Unfavorable Conditions, in revision Water Resources Research. PDF

Ma H., Hradisky M., & *Johnson W.P., 2013, Extending Applicability of Correlation Equations to Predict Colloidal Retention in Porous Media at Low Fluid Velocity, Environ. Sci. Technol., 47, 2272−2278. PDF, Supporting Information

Carling G.T., Diaz X, Ponce M., Perez L., Nasimba L, Pazmino E, Rudd A, Fernandez DP, Merugu S, Gale BK, & *Johnson W.P., 2013, Trace element concentrations & loads in three southern Ecuador rivers impacted by artisanal gold mining, Water, Air, & Soil Pollution, Volume 224(2). PDF

Tasci T.O, Manangon E., Fernandez D.P., Johnson W.P., Gale B.K., 2013, Separation of Magnetic Nanoparticles by Cyclical Electrical Field Flow Fractionation,  IEEE Transactions on Magnetics, v 49, n 1, p 331-335, DOI: 10.1109/TMAG.2012.2223753. PDF

Carling G.T, Richards D.C., Hoven H.M., Miller T., Fernandez D.P., Rudd A.,  Pazmino E., *Johnson W.P., 2012, Relationships of surface water, pore water, & sediment chemistry in wetlands adjacent to Great Salt Lake, Utah, & potential impacts on plant community health, Science of the Total Environment, 443, 798-811. PDF

Dimkpa C. O., McLean J.E., Britt D.W., Johnson W.P., Arey B., Lea A.S, Anderson A.J., 2012, Nanospecific Inhibition of Pyoverdine Siderophore Production in Pseudomonas chlororaphis O6 by CuO Nanoparticles, Chemical Research in Toxicology, 25(5), 1066-1074. PDF

Tasci T. O., Johnson W.P., Gale B.K., 2012. “Cyclical Magnetic Field Flow Fractionation”. J. Appl. Phys: Proceedings of the 56th annual conference on magnetism & magnetic materials, vol. 111, p. 07D128.PDF

Dimkpa  CO, McLean JE, Latta DE, Manangón E, Britt DW, Johnson WP, Boyanov MI, Anderson AJ, 2012, CuO & ZnO nanoparticles: phytotoxicity, metal speciation & induction of oxidative stress in sand-grown wheat, J. Nanopart. Res., DOI: 10.1007/s11051-012-1125-9. PDF

Carling G.T., Fernandez D.P., & Johnson W.P., 2012, Dust-mediated loading of trace & major elements to Wasatch Mountain snowpack, Sci. Tot. Env., 432, 65-77, doi:10.1016/j.scitotenv.2012.05.077. PDF

Ma H., Pazmino E.F, Johnson W.P., 2011, Surface Heterogeneity on Hemispheres-in-Cell Model Yields All Experimentally-Observed Non-Straining Colloid Retention Mechanisms in Porous Media in the Presence of Energy Barriers, Langmuir, 27 (24), 14982–14994, http://dx.doi.org/10.1021/la203587j. PDF, Supporting Information

Pazmino E.F., Ma H., Johnson W.P., 2011, Applicability of colloid filtration theory in size-distributed, reduced porosity, granular media in the absence of energy barriers, Environ. Sci. Technol., 45, 10401-10407, doi:10.1021/es202203m. PDF

Ma H., Pazmino E.F., Johnson W.P., 2011, Gravitational Settling Effects on Unit Cell Predictions of Colloidal Retention in Porous Media in the Absence of Energy Barriers, Environ. Sci. Technol., 45(19), 8306-8312. PDF Supporting Information

Johnson W.P., Ma H., Pazmino E., 2011, Straining Credibility:  A general comment regarding common arguments used to infer straining as the mechanism of colloid retention in porous media, Environ. Sci. Technol., 45(9):3831-2. PDF

David C. Deubner, Philip Sabey, Wenjie Huang, Diego Fernandez, Abigail Rudd, David C Deubner, Philip Sabey, Wenjie Huang, Diego Fernandez, Abigail Rudd, W. P. Johnson, Jason Storrs, Rod Larson, 2011, Solubility & Chemistry of Materials Encountered by Beryllium Mine & Ore Extraction Workers: Relation to Risk 53(10), 1187. PDF

Isunju J.B., Schwartz K., Schouten M.A., Johnson W.P., van Dijk M.P., 2011, Socio-economic aspects of improved sanitation in slums: a review, Public Health, 125(6), 368-76. DOI: 10.1016/j.puhe.2011.03.008. PDF

Carling G.T., Fernandez D.P., Huang W., Rudd A., Pazmino E., *Johnson W.P., 2011, Trace element particulate pulse & diel variations in perimeter freshwater wetlands of Great Salt Lake, Utah, Chemical Geology, doi:10.1016/j.chemgeo.2011.01.001. PDF

Dimkpa CO, Calder A, Gajjar P, Merugu S, Huang W, Britt DW, McLean JE, Johnson W.P., Anderson AJ., 2011, Interaction of silver nanoparticles with an environmentally beneficial bacterium, Pseudomonas chlororaphis, J Hazard Mater., 188(1-3):428-35. PDF

Huang W., D. Fernandez, A. Rudd, W. P. Johnson, D. Deubner, P. Sabey, J. Storrs, R. Larsen, 2010, Dissolution & nanoparticle generation behavior of Be-associated materials in synthetic lung fluid using inductively coupled plasma mass spectroscopy & flow field-flow fractionation , J. of Chromatography A, http://dx.doi.org/10.1016/j.chroma.2010.11.070, PDF, Supporting Information

Dicataldo G, D.F. Hayes, W.P. Johnson , W.O. Moellmer , T. Miller, 2010, Effect of dissolved oxygen, pH, & water temperature on diel changes of dissolved selenium & other trace metals in a Great Salt Lake wetland, Applied Geochem., 26, 28-36, doi:10.1016/j.apgeochem.2010.10.011. PDF, Supporting Information

Johnson W.P., Pazmino E., Ma H., “Direct Observations of Colloid Retention in Granular Media in the Presence of Energy Barriers & Pitfalls of Inferring Mechanisms from Indirect Observations”, 2010, Water Research, 4 4 (4), 1158 – 1169, doi:10.1016/j.watres.2009.12.014. PDF, Supporting Information

Ma H., W. P. Johnson, “Colloid Retention in Porous Media of Various Porosities: Predictions by the Hemispheres-in-Cell Model”, 2010, Langmuir, 16 (3), 26(3), 1680-1687, doi: 10.1021/la902657v. PDF

Ma H., Julien Pedel, Paul Fife, & W.P. Johnson, 2009, A New Platform to Predict Colloid Deposition in Porous Media, Environ. Sci. Technol., 43(22), 8573-8579, doi:10.1021/es9012421b. PDF

Gajjar P, B. Pettee, D. W. Britt, W. Huang, W. P. Johnson, A. J. Anderson, 2009, Antimicrobial activities of commercial nanoparticles against an environmental soil microbe, Pseudomonas putida KT2440, J. Biological Engineering, 3:9 doi:10.1186/1754-1611-3-9 PDF

Johnson, W. P., X. Li, M. Tong, & H. Ma, 2009, Comment on “Transport & fate of bacteria in porous media: Coupled effects of chemical conditions & pore space geometry” by Saeed Torkzaban et al., Water Resour. Res., 45, W09603, doi:10.1029/2008WR007389. PDF

Beisner K., W.P. Johnson, D.L. Naftz, 2009, Selenium & trace element mobility affected by periodic interruption of meromixis in the Great Salt Lake, Utah, Science of the Total Environment, 407, 5263-5273. PDF

Diaz X, D. Fernandez, D.L. Naftz, W.P. Johnson, 2009, Size & Elemental Distributions of Nano- to Micro- Particulates in the Geochemically-stratified Great Salt Lake, App. Geochem., doi:10.1016/j.apgeochem.2009.04.031. PDF, Supporting Information

Oliver W., W.P. Johnson, C.C Fuller, D.L. Naftz, 2009, Permanent selenium sedimentation flux from the Great Salt Lake, Utah, App. Geochem, 24 , 936-949. PDF

Diaz X., D.L. Naftz, W.P. Johnson, 2009, Selenium Mass Balance in the Great Salt Lake, Utah, Sci. Tot. Env. 407, 2333-2341. PDF

Diaz X., W.A. Oliver, D.L. Naftz, W.P. Johnson, 2009, Volatile Selenium Flux from the Great Salt Lake, Utah, Environ. Sci. Technol., 43 (1), pp 53–59, DOI: 10.1021/es801638w. PDF

Naftz, D.L., Johnson, W.P., Freeman, M.L., Beisner, K., Diaz, X., & Cross, V.A., 2009, Estimation of selenium loads entering the south arm of Great Salt Lake, Utah, from May 2006 through March 2008: U.S. Geological Survey Scientific Investigations Report 2008–5069, 40 p. PDF

Tong M., H. Ma, W.P. Johnson, 2008, Funneling of Flow into Grain-to-grain Contacts Drives Colloid-Colloid Aggregation in the Presence of an Energy Barrier, Environ. Sci. Technol. 42(8), 2826-2832, doi: 10.1021/es071888v. PDF

Johnson, W. P., M. Tong, & X. Li , 2007, On colloid retention in saturated porous media in the presence of energy barriers: The failure of α, & opportunities to predict η, Water Resour. Res., 43, W12S13, doi:10.1029/2006WR005770. PDF

Johnson W.P., Xiqing Li, & Gozde Yal, 2007, Colloid Retention in Porous Media: Mechanistic Confirmation of Wedging & Retention in Zones of Flow Stagnation, Environ. Sci. Technol., 41,1279-1287, DOI: 10.1021/es061301x. PDF

Tong M., & W.P. Johnson, 2006, Colloid Population Heterogeneity Drives Hyper-Exponential Deviation from Classic Filtration Theory, Environ. Sci. Technol., 2007, 41(2), 493-499, DOI: 10.1021/es061202j. PDF

Johnson W.P., X. li, & S. Assemi, 2006, Deposition & Re-entrainment Dynamics of Microbes & Non-Biological Colloids during Non-Perturbed Transport in Porous Media in the Presence of an Energy Barrier to Deposition, Advances in Water Resources, 30 (6-7), 1432-1454, doi:10.1016/j.advwatres.2006.05.020 PDF

Tong M., & W.P. Johnson, 2006, Excess colloid retention in porous media as a function of colloid size, fluid velocity, & grain angularity, Environ. Sci. Technol., 40(24), 7725-7731, DOI: 10.1021/es061201r PDF 1  PDF 2

Johnson W.P., 2006, Comment on Pang et al. (2005) Filtration & transport of Bacillus subtilis spores & the F-RNA phage MS2 in a coarse alluvial aquifer: Implications in the estimation of setback distances, J. Cont. Hyd., 86, 160-161. PDF

Johnson W.P. & M. Tong, 2006, Observed & simulated fluid drag effects on colloid deposition in the presence of an energy barrier in an impinging jet system, Environ. Sci. Technol. 40(16), 5015-5021, DOI: 10.1021/es060450c. PDF

Assemi S., Jakub Nalaskowski, J.D. Miller, & W.P. Johnson, 2006, The Isoelectric Point of Fluorite by Direct Force Measurements Using Atomic Force Microscopy, Langmuir, 22(4); 1403-1405. PDF

Assemi S., J. Nalaskowski, & W.P. Johnson, 2006, Direct force measurements between latex microspheres & glass surface using Atomic Force Microscopy, Colloids & Surfaces A: Physicochemical & Engineering Aspects, 286 (1-3), 70-77. PDF

Li X., C.L. Lin, J. D. Miller, W.P. Johnson, 2006, Pore-scale Observation of Microsphere Deposition at Grain-Grain Contacts over Assemblage-scale Porous Media Domains Using X-ray Microtomography, Environ. Sci. Technol., 40 (12), 3762-3768. PDF 1  PDF 2

Li X., C.L. Lin, J. D. Miller, W.P. Johnson, 2006, Role of grain to grain contacts on profiles of retained colloids in porous media in the presence of an energy barrier to deposition, Environ. Sci. Technol.. 40 (12), 3769-3774. PDF

Johnson W.P., M. Tong, & X. Li, 2005, Colloid Deposition in Environmental Porous Media: Deviation from Existing Theory is the Norm; Not the Exception, EOS 86(18), 179-180. (PDF unavailable)

Johnson W.P., & X. Li, 2005, Comment on: Tufenkji & Elimelech (2005) Breakdown of colloid filtration theory: role of the secondary energy minimum & surface charge heterogeneities, Langmuir, 21, 841-852, Langmuir, 21, 10895-10895. PDF

Tong M., T.A. Camesano, & Johnson W.P., 2005, Spatial Variation in Deposition Rate Coefficients of an Adhesion-Deficient Bacterial Strain in Quartz Sand, Environmental Science & Technology, 39(10), 3679-3687. PDF

Li X., P. Zhang, C.L. Lin, & W.P. Johnson, 2005, Role of Hydrodynamic Drag on Microsphere Deposition & Re-entrainment in Porous Media under Unfavorable Conditions, Environmental Science & Technology, 39(11), 4012-4020. PDF

Li X., & W.P. Johnson, 2005, Non-Monotonic Variations in Removal Rate Coefficients of Microspheres in Porous Media under Unfavorable Deposition Conditions, Environmental Science & Technology, 39, 1658-1665. PDF

Tong M., X. Li, C. Brow, & W.P. Johnson, 2005, Detachment-Influenced Transport of an Adhesion-Deficient Bacterial Strain in Water-Reactive Porous Media, Environmental Science & Technology, 39(8), 2500-2508. PDF

Dong, H., T. D. Scheibe, W. P. Johnson, C. M. Monkman, & M. E. Fuller, 2005, Direct Determination of Change of Bacterial Collision Efficiency with Transport Distance in Field Scale Bacterial Transport Experiments, Groundwater, 449(3), 415–429.

Brow C., M. Tong, & W.P. Johnson, & J. Ricka, 2005, Comparison of Microsphere Deposition in Porous Media Versus Simple Shear Systems, Colloids & Surfaces A: Physicochemical & Engineering Aspects, 253, 125-136. PDF

Drake L.A., Meyer A.E, Forsberg R.L., Baier R.E., Doblin M.A., Heinemann S., Johnson W.P., Koch M., Rublee P.A. & Dobbs F.C., 2005, Potential Invasion of Microorganisms & Pathogens via ‘Interior Hull Fouling’: Biofilms inside Ballast-Water Tanks, Biological Invasions, 7(6), 969 – 982. PDF

Li X., T.D. Scheibe, & W.P. Johnson, 2004, Apparent Decreases in Colloid Removal Rate Coefficients with Distance of Transport under Unfavorable Deposition Conditions: A General Phenomenon, Environmental Science & Technology, 38(21): 5616-5625, 2004. PDF

Fuller, M.E.; Mailloux, B.J.; Streger, S.; Hall, J.; Zhang, P.; Vainberg, S.; Johnson, W.P.; Onstott, T.C.; DeFlaun, 2004, Application of a vital fluorescent staining method for simultaneous, near real time concentration monitoring of two bacterial strains in an Atlantic Coastal Plain Aquifer in Oyster, VA, Applied & Evironmental Microbiology, 70(3), 1680-1687. PDF

W.P. Johnson & W. O. McIntosh, 2003, Field investigation of enhanced detachment of attached bacterial cells by hydrodynamic collision with injected bacteria, J. Microb. Meth, 1789, 1-12. PDF

W.P. Johnson, G. Bao, W.W. John, 2002, Specific UV Absorbance of Aldrich Humic Acid: Changes During Transport in Aquifer Sediment, Environ. Sci. & Technol., 36(4), 608-616. PDF

W.P. Johnson, P. Zhang, P.M. Gardner, M.E. Fuller, & M.F. DeFlaun, 2001, Monitoring the Response of Indigenous Bacteria to the Arrival of Injected Bacteria using Ferrographic Capture, Applied & Environmental Microbiology, 67(10), 4908-4913. PDF

Zhang, P., Johnson, W.P., Scheibe, T.D., Choi, K., & Dobbs, F.G., 2001, Extended Tailing of Bacterial Concentrations at the Narrow Channel Site, Oyster, VA, Water Resources Research, 37(11), 2687-2698. PDF

DeFlaun, M.F.; Fuller, M.E.; Johnson, W.P.; Zhang, P.; Mailloux, B.J.; Onstott, T.C.; Holben W.; Balkwill, D.; & White, D., 2001, Comparison of Innovative Methods for Monitoring Bacterial Transport, J. Microbial Methods, 47, 219-231. PDF

Zhang, P.F., Johnson, W.P., Piana, M.J., Fuller, C.C., & Naftz, D.L., 2001, Differential Breakthrough of Microspheres & Bromide in a Zero-Valent Iron Permeable Reactive Barrier, Groundwater, 39(6), 831-840. PDF

Fuller, M.E.; Mailloux, B.J.; Zhang, P.; Streger, S.; Hall, J.; Vainberg, S.; Beavis, S.; Johnson, W.P.; Onstott, T.C.; DeFlaun, 2001, M.F. Field-scale evaluation of CFDA/SE staining coupled with multiple detection methods for assessing the transport of bacteria in situ. FEMS Microbiology Ecology 37(1), p. 55-66. PDF

Schmitz, P., Duyvesteyn, S., & Johnson W.P., 2001, Adsorption of Aurocyanide Complexes onto Carbonaceous Matter from Preg-Robbing Goldstrike Ore, Hydrometallurgy, 61, 121-135. PDF

Johnson, W.P., Zhang, P., Fuller, M.E., Scheibe, T.D., Mailloux, B.J., Onstott, T.C., DeFlaun, M.F., Hubbard, S.S., Radtke, J., Kovacik, W.P., & Holben,W., 2001, Ferrographic Tracking of Bacterial Transport in the Field at the Narrow Channel Focus Area, Oyster, VA, Environmental Science & Technology. 35(1), 182-191. PDF

Stenebraten, J.F., & Johnson, W.P., 2000, Characterization of Goldstrike Ore Carbonaceous Material: 2. Physical Characteristics, Minerals & Metallurgical Processing, 17(1), 1-9. PDF

John, W.W., Bao B., & Johnson, W.P., & Stauffer, T.B., 2000, Mixed Sorption of Nonionic Surfactant Oligomers to Low foc Aquifer Sediment & PCE DNAPL, & the Resulting Effect on Kd,PCE, Environmental Science & Technology, 34(4), 672-279. PDF

Schmitz, P., Johnson W.P., & Duyvesteyn, S., 2000, Gold Leaching from Goldstrike Ore Carbonaceous Matter & its Relationship to Preg-Robbing, Hydrometallurgy, 60, 25-40. PDF 1  PDF 2

Bao B., John, W.W., & Johnson, W.P., 2000, Chromatographic Alteration of a Nonionic Surfactant Mixture During Transport in DNAPL-Contaminated Sediment, Environmental Science & Technology, 34(4), 680-685. PDF

Johnson, W.P., 1999, Sediment Control of Facilitated Transport & Enhanced Desorption, ASCE, Journal of Environmental Engineering, 126(1), 47-56. PDF

Zhang, P., & Johnson, W.P., 1999, Bacterial Tracking Using Ferrographic Separation, Environ. Sci. Technol., 33(14) 2456-2460. PDF

Zhang, P., & Johnson, W.P., 1999, Rapid Selective Ferrographic Enumeration of Bacteria, J. of Magnet. & Mag. Mat., 194, 267-274. PDF

Stenebraten, J.F., & Johnson, W.P., 1999, Characterization of Goldstrike Ore Carbonaceous Material: 1. Chemical Characteristics, Minerals & Metallurgical Processing, 16(3), 37-44. PDF

Johnson, W.P., & John, W.W., 1999, A Comparison of Humic Substances & Surfactants as Remediation Agents: PCE Solubilization & Mobilization by Commercial Humic Acid, J. of Cont. Hyd., 35, 343-362. PDF

Johnson, W.P., Cabral, K., Lion L.W., & Corapcioglu, Y.M., 1998, Reconciliation of Expressions for the Modified Retardation Factor & Incorporation of Non-linear Effects, J. Cont. Hydr.32, 247-266. PDF

Johnson, W.P., Martin, M.J., Gross, M.J., & Logan, B.E., 1996, Facilitation of Bacterial Transport Through Porous Media by Changes in Solution & Surface Properties, Colloids & Surfaces A: Physicochemical & Engineering Aspects 107, 263-271. PDF

Martin, M.J., Logan, B.E., Johnson, W.P., Jewett, D.J., & Arnold, R.G., 1996, Scaling Bacterial Filtration Rates in Different Sized Porous Media, ASCE, Journal of Environmental Engineering 122(5), 407-415. PDF

Johnson, W.P., & Logan, B.E., 1996, Enhanced Transport of Bacteria in Porous Media by Sediment-Phase & Aqueous-Phase Natural Organic Matter, Water Research 30(4), 923-931. PDF

Johnson, W.P., Blue, K.A., Logan, B.E., Arnold, R.G., 1995, Modeling Bacterial Detachment During Transport Through Porous Media as a Residence-Time-Dependent Process: Water Resources Research, 31(11), 2649-2658. PDF

Johnson, W.P., & Amy, G.L., 1995, Facilitated Transport & Enhanced Desorption of Polycyclic Aromatic Hydrocarbons (PAH) by Natural Organic Matter (NOM) in Aquifer Sediments: Environmental Science & Technology, 29, 807-817. PDF

Johnson, W.P., Amy, G.L., & Chapra, S.C., 1995, Model Simulation of Facilitated Transport & Enhanced Desorption of Polynuclear Aromatic Hydrocarbons (PAH) by Natural Organic Matter (NOM): ASCE, Journal of Environmental Engineering 121(6), 438-446. PDF

Harte, P.T., & Johnson, W.P., 1993, Geohydrology & Water Quality of Stratified-drift Aquifers in the Contoocook River Basin, New Hampshire: USGS Water Resources Investigation 92-4154, 120p. PDF

Cronin, V.S., Johnson, W.P., Johnson, Noye S., & Johnson, Gary D., 1989, Chronostratigraphy of the Upper Cenozoic Bunthang Sequence & Possible Mechanisms Controlling Base-level in the Skardu Inter-montane Basin, Karakorum Himalaya, Pakistan: Geological Society of America, Special Paper 232, Tectonics of the Western Himalayas, pp. 295-309. PDF

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