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Jonathan K. Challis
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Microplastic contamination in lake Winnipeg, Canada
PJ Anderson, S Warrack, V Langen, JK Challis, ML Hanson, MD Rennie
Environmental pollution 225, 223-231, 2017
2912017
A critical assessment of the photodegradation of pharmaceuticals in aquatic environments: defining our current understanding and identifying knowledge gaps
JK Challis, ML Hanson, KJ Friesen, CS Wong
Environmental Science: Processes & Impacts 16 (4), 672-696, 2014
1542014
Development and calibration of an organic-diffusive gradients in thin films aquatic passive sampler for a diverse suite of polar organic contaminants
JK Challis, ML Hanson, CS Wong
Analytical chemistry 88 (21), 10583-10591, 2016
1242016
Quantum yields for direct photolysis of neonicotinoid insecticides in water: implications for exposure to nontarget aquatic organisms
Z Lu, JK Challis, CS Wong
Environmental Science & Technology Letters 2 (7), 188-192, 2015
952015
Performance of a constructed wetland in Grand Marais, Manitoba, Canada: Removal of nutrients, pharmaceuticals, and antibiotic resistance genes from municipal wastewater
JC Anderson, JC Carlson, JE Low, JK Challis, CS Wong, CW Knapp, ...
Chemistry Central Journal 7 (1), 1-15, 2013
942013
Presence and hazards of nutrients and emerging organic micropollutants from sewage lagoon discharges into Dead Horse Creek, Manitoba, Canada
JC Carlson, JC Anderson, JE Low, P Cardinal, SD MacKenzie, SA Beattie, ...
Science of the Total Environment 445, 64-78, 2013
882013
Macrophytes may not contribute significantly to removal of nutrients, pharmaceuticals, and antibiotic resistance in model surface constructed wetlands
P Cardinal, JC Anderson, JC Carlson, JE Low, JK Challis, SA Beattie, ...
Science of the Total Environment 482, 294-304, 2014
762014
Aquatic photochemistry of the sulfonamide antibiotic sulfapyridine
JK Challis, JC Carlson, KJ Friesen, ML Hanson, CS Wong
Journal of Photochemistry and Photobiology A: Chemistry 262, 14-21, 2013
572013
Stability of pharmaceuticals and other polar organic compounds stored on polar organic chemical integrative samplers and solid‐phase extraction cartridges
JC Carlson, JK Challis, ML Hanson, CS Wong
Environmental toxicology and chemistry 32 (2), 337-344, 2013
532013
Field evaluation and in situ stress testing of the organic-diffusive gradients in thin-films passive sampler
JK Challis, KM Stroski, KH Luong, ML Hanson, CS Wong
Environmental science & technology 52 (21), 12573-12582, 2018
462018
Wastewater sources of per-and polyfluorinated alkyl substances (PFAS) and pharmaceuticals in four Canadian Arctic communities
KM Stroski, KH Luong, JK Challis, LG Chaves-Barquero, ML Hanson, ...
Science of the Total Environment 708, 134494, 2020
362020
Inputs, source apportionment, and transboundary transport of pesticides and other polar organic contaminants along the lower Red River, Manitoba, Canada
JK Challis, LD Cuscito, S Joudan, KH Luong, CW Knapp, ML Hanson, ...
Science of the Total Environment 635, 803-816, 2018
342018
The influence of pH on sampler uptake for an improved configuration of the organic-diffusive gradients in thin films passive sampler
KM Stroski, JK Challis, CS Wong
Analytica chimica acta 1018, 45-53, 2018
312018
Pharmaceuticals and pesticides archived on polar passive sampling devices can be stable for up to 6 years
JK Challis, ML Hanson, CS Wong
Environmental toxicology and chemistry 37 (3), 762-767, 2018
212018
Occurrences of tire rubber-derived contaminants in cold-climate urban runoff
JK Challis, H Popick, S Prajapati, P Harder, JP Giesy, K McPhedran, ...
Environmental Science & Technology Letters 8 (11), 961-967, 2021
172021
Performance of the organic-diffusive gradients in thin-films passive sampler for measurement of target and suspect wastewater contaminants
JK Challis, XO Almirall, PA Helm, CS Wong
Environmental Pollution 261, 114092, 2020
172020
Microplastics flowing into Lake Winnipeg: densities, sources, flux, and fish exposures
S Warrack, JK Challis, ML Hanson, MD Rennie
Proceedings of Manitoba's Undergraduate Science and Engineering Research 3, 2017
162017
Selective serotonin reuptake inhibitors and β‐blocker transformation products may not pose a significant risk of toxicity to aquatic organisms in wastewater effluent‐dominated …
AK Brown, JK Challis, CS Wong, ML Hanson
Integrated Environmental Assessment and Management 11 (4), 618-639, 2015
132015
Calibration of organic-diffusive gradients in thin films (o-DGT) passive samplers for perfluorinated alkyl acids in water
P Wang, JK Challis, KH Luong, TC Vera, CS Wong
Chemosphere 263, 128325, 2021
122021
Ractopamine and other growth-promoting compounds in beef cattle operations: fate and transport in feedlot pens and adjacent environments
JK Challis, S Sura, J Cantin, AW Curtis, KM Shade, TA McAllister, ...
Environmental Science & Technology 55 (3), 1730-1739, 2021
102021
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