Jonathan K. Challis, Ph. D.

Image Jonathan Challis
Chercheur scientifique, chimie des pesticides et écotoxicologie

Le groupe Chimie des pesticides d’AAC met à profit les outils de chimie analytique et environnementale et de toxicologie pour accroître notre compréhension du devenir et des effets des produits agrochimiques dans l’environnement. Le groupe utilise des outils d’échantillonnage passif et de spectroscopie de masse pour caractériser les produits agrochimiques dans l'air, dans l’eau, dans les sédiments et dans les sols.

Énoncés de recherches/projets

Projets de recherche en cours

  • Dynamique comparative de pesticides d’usage courant dans trois bassins prioritaires du Canada
  • Outils et stratégiques d'atténuation des effets des pesticides sur les milieux humides pour améliorer la production agricole durable
  • Science, adoption et adaptation des bio-épurateurs pour les eaux de rinçage des pesticides pour soutenir la résilience des agroécosystèmes canadiens et protéger les ressources en eau
  • Qualité de l’eau dans les districts d’irrigation de l’Alberta
  • Mise au point d’un dosage immunologique RT-PCR et d’un biocapteur pour la détection rapide de spores fongiques aéroportées dans les cultures céréalières

Principales publications

  • Challis, J.K., Popick, H., Prajapati, S., Harder, P., Giesy, J.P., McPhedran, K., Brinkmann, M. (2021). Occurrences of tire rubber derived contaminants in cold-climate urban runoff. Environmental Science and Technology Letters; 55, 13122.
  • Challis, J.K., Sura, S., Cantin, J., Curtis, A.W., Shade, K.M., McAllister, T.A., Jones, P.D., Giesy, J.P., Larney, F.J., (2021). Ractopamine and Other Growth-Promoting Compounds in Beef Cattle Operations: Fate and Transport in Feedlot Pens and Adjacent Environments. Environmental Science & Technology; 55, 1739.
  • Wang, P., Challis, J. K., Luong, K. H., Vera, T. C., Wong, C. S. (2021). Calibration of Organic-Diffusive Gradients in Thin Films (o-DGT) Passive Samplers for Perfluorinated Alkyl Acids in Water. Chemosphere; 263, 128325.
  • Challis, J.K., Parajas, A., Anderson, J., Asiedu, E., Martin, J.W., Wong, C.S., Ross, M.S. (2020). Photodegradation of Bitumen-Derived Organics in Oil Sands Process-Affected Water. Environmental Science: Processes and Impacts; 22, 1243.
  • Challis, J.K., Almirall, X.O., Helm, P.A., Wong, C.S. (2020). Performance of the Organic Diffusive Gradients in Thin-Films Passive Sampler for Measurement of Target and Suspect Wastewater Contaminants. Environmental Pollution; 261, 114092.
  • Challis, J.K., Stroski, K.M., Luong, K.H., Hanson, M.L., Wong, C.S. (2018). Field evaluation and in-situ stress-testing of the organic-diffusive gradients in thin-films passive sampler. Environmental Science & Technology; 52, 12582.
  • Challis, J.K., Cuscito, L.D., Joudan, S., Luong, K.H., Knapp, C.W., Hanson, M.L., Wong, C.S. (2018) Inputs, source apportionment, and transboundary transport of pesticides and other polar organic contaminants along the lower Red River, Manitoba, Canada. Science of the Total Environment; 635, 803.
  • Stroski, K.M., Challis, J.K., Wong, C.S. (2018) The influence of pH on sampler uptake for an improved configuration of the organic-diffusive gradients in thin films passive sampler. Analytica Chimica Acta; 1018, 45.
  • Challis, J.K., Hanson, M.L., Wong, C.S. (2018) Pharmaceuticals and pesticides archived on polar passive sampling devices can be stable for up to 6 years. Environmental Toxicology and Chemistry; 37, 762.
  • Anderson, P., Warrack, S., Langen, V., Challis, J.K., Hanson, M.L., Rennie, M. (2017) Microplastic contamination in Lake Winnipeg, Canada. Environmental Pollution; 225, 223.
  • Challis, J.K., Hanson, M.L., Wong, C.S. (2016) Development and Calibration of an Organic-Diffusive Gradients in Thin Films Aquatic Passive Sampler for a Diverse Suite of Polar Organic Contaminants. Analytical chemistry; 88, 10583.
  • Lu, Z., Challis, J.K., Wong, C.S. (2015) Quantum Yields for Direct Photolysis of Neonicotinoid Insecticides in Water: Implications for Exposure to Non-target Aquatic Organisms. Environmental Science & Technology Letters; 2, 188.
  • Challis, J.K., Hanson, M.L., Friesen, K.J., Wong, C.S. (2014) A critical assessment of the photodegradation of pharmaceuticals in aquatic environments: defining our current understanding and identifying knowledge gaps. Environmental Science-Processes & Impacts; 16, 672.

Activités professionnelles / intérêts

Comité de rédaction, Environmental Toxicology & Chemistry (de 2020 à 2023)

Vice-président, Prairie Northern Chapter of SETAC (de 2020 à aujourd’hui)

Président, Groupe d’intérêt sur la chimie de SETAC (2021-2022)

Prix et études

  • Boursier posdoctoral Banting, Centre de toxicologie, Université de la Saskatchewan
  • Doctorat, boursier Vanier, Chimie environnementale et analytique, Université du Manitoba
  • B Baccalauréat ès sciences avec spécialisation en chimie, Université de Winnipeg

Principales publications

  • Challis, J.K., Popick, H., Prajapati, S., Harder, P., Giesy, J.P., McPhedran, K., Brinkmann, M. (2021). Occurrences of tire rubber derived contaminants in cold-climate urban runoff. Environmental Science and Technology Letters; 55, 13122.

  • Challis, J.K., Sura, S., Cantin, J., Curtis, A.W., Shade, K.M., McAllister, T.A., Jones, P.D., Giesy, J.P., Larney, F.J., (2021). Ractopamine and Other Growth-Promoting Compounds in Beef Cattle Operations: Fate and Transport in Feedlot Pens and Adjacent Environments. Environmental Science & Technology; 55, 1739.

  • Wang, P., Challis, J. K., Luong, K. H., Vera, T. C., Wong, C. S. (2021). Calibration of Organic-Diffusive Gradients in Thin Films (o-DGT) Passive Samplers for Perfluorinated Alkyl Acids in Water. Chemosphere; 263, 128325.

  • Challis, J.K., Parajas, A., Anderson, J., Asiedu, E., Martin, J.W., Wong, C.S., Ross, M.S. (2020). Photodegradation of Bitumen-Derived Organics in Oil Sands Process-Affected Water. Environmental Science: Processes and Impacts; 22, 1243.

  • Challis, J.K., Almirall, X.O., Helm, P.A., Wong, C.S. (2020). Performance of the Organic Diffusive Gradients in Thin-Films Passive Sampler for Measurement of Target and Suspect Wastewater Contaminants. Environmental Pollution; 261, 114092.

  • Challis, J.K., Stroski, K.M., Luong, K.H., Hanson, M.L., Wong, C.S. (2018). Field evaluation and in-situ stress-testing of the organic-diffusive gradients in thin-films passive sampler. Environmental Science & Technology; 52, 12582.

  • Challis, J.K., Cuscito, L.D., Joudan, S., Luong, K.H., Knapp, C.W., Hanson, M.L., Wong, C.S. (2018) Inputs, source apportionment, and transboundary transport of pesticides and other polar organic contaminants along the lower Red River, Manitoba, Canada. Science of the Total Environment; 635, 803.

  • Stroski, K.M., Challis, J.K., Wong, C.S. (2018) The influence of pH on sampler uptake for an improved configuration of the organic-diffusive gradients in thin films passive sampler. Analytica Chimica Acta; 1018, 45.

  • Challis, J.K., Hanson, M.L., Wong, C.S. (2018) Pharmaceuticals and pesticides archived on polar passive sampling devices can be stable for up to 6 years. Environmental Toxicology and Chemistry; 37, 762.

  • Anderson, P., Warrack, S., Langen, V., Challis, J.K., Hanson, M.L., Rennie, M. (2017) Microplastic contamination in Lake Winnipeg, Canada. Environmental Pollution; 225, 223.

  • Challis, J.K., Hanson, M.L., Wong, C.S. (2016) Development and Calibration of an Organic-Diffusive Gradients in Thin Films Aquatic Passive Sampler for a Diverse Suite of Polar Organic Contaminants. Analytical chemistry; 88, 10583.

  • Lu, Z., Challis, J.K., Wong, C.S. (2015) Quantum Yields for Direct Photolysis of Neonicotinoid Insecticides in Water: Implications for Exposure to Non-target Aquatic Organisms. Environmental Science & Technology Letters; 2, 188.

  • Challis, J.K., Hanson, M.L., Friesen, K.J., Wong, C.S. (2014) A critical assessment of the photodegradation of pharmaceuticals in aquatic environments: defining our current understanding and identifying knowledge gaps. Environmental Science-Processes & Impacts; 16, 672.