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Chlorpyrifos degradation via photoreactive TiO2 nanoparticles: Assessing the impact of a multi-component degradation scenario.

Publication ,  Journal Article
Farner Budarz, J; Cooper, EM; Gardner, C; Hodzic, E; Ferguson, PL; Gunsch, CK; Wiesner, MR
Published in: Journal of hazardous materials
June 2019

High concentrations of pesticides enter surface waters following agricultural application, raising environmental and human health concerns. The use of photoreactive nanoparticles has shown promise for contaminant degradation and surface water remediation. However, it remains uncertain how the complexity of natural waters will impact the photodegradation process. Here, we investigate the photoreactivity of titanium dioxide nanoparticles, the capability to degrade the pesticide chlorpyrifos, and the effect of and impact on bacteria during the photodegradation process. Loss of chlorpyrifos in solution resulted solely from photocatalytic oxidation, with 80% degradation observed after 24 h in our reactor, either in the presence or absence of bacteria. Degradation of chlorpyrifos to chlorpyrifos oxon and 3,5,6-trichloro-2-pyridinol was observed via LC/MS-MS and effectively modeled for the given reactor conditions. Bacterial inactivation occurred over 60 min and was not impacted by the presence of chlorpyrifos. The relative affinity of bacteria and chlorpyrifos for the nanoparticle surface decreased the amount of Reactive Oxygen Species (ROS) detected in the bulk by up to 94%, suggesting that ROS measurements in simplified systems may overestimate the reactivity of photoreactive nanoparticles in complex environments.

Duke Scholars

Published In

Journal of hazardous materials

DOI

EISSN

1873-3336

ISSN

0304-3894

Publication Date

June 2019

Volume

372

Start / End Page

61 / 68

Related Subject Headings

  • Strategic, Defence & Security Studies
  • 41 Environmental sciences
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 05 Environmental Sciences
  • 03 Chemical Sciences
 

Citation

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ICMJE
MLA
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Farner Budarz, J., Cooper, E. M., Gardner, C., Hodzic, E., Ferguson, P. L., Gunsch, C. K., & Wiesner, M. R. (2019). Chlorpyrifos degradation via photoreactive TiO2 nanoparticles: Assessing the impact of a multi-component degradation scenario. Journal of Hazardous Materials, 372, 61–68. https://doi.org/10.1016/j.jhazmat.2017.12.028
Farner Budarz, Jeffrey, Ellen M. Cooper, Courtney Gardner, Emina Hodzic, P Lee Ferguson, Claudia K. Gunsch, and Mark R. Wiesner. “Chlorpyrifos degradation via photoreactive TiO2 nanoparticles: Assessing the impact of a multi-component degradation scenario.Journal of Hazardous Materials 372 (June 2019): 61–68. https://doi.org/10.1016/j.jhazmat.2017.12.028.
Farner Budarz J, Cooper EM, Gardner C, Hodzic E, Ferguson PL, Gunsch CK, et al. Chlorpyrifos degradation via photoreactive TiO2 nanoparticles: Assessing the impact of a multi-component degradation scenario. Journal of hazardous materials. 2019 Jun;372:61–8.
Farner Budarz, Jeffrey, et al. “Chlorpyrifos degradation via photoreactive TiO2 nanoparticles: Assessing the impact of a multi-component degradation scenario.Journal of Hazardous Materials, vol. 372, June 2019, pp. 61–68. Epmc, doi:10.1016/j.jhazmat.2017.12.028.
Farner Budarz J, Cooper EM, Gardner C, Hodzic E, Ferguson PL, Gunsch CK, Wiesner MR. Chlorpyrifos degradation via photoreactive TiO2 nanoparticles: Assessing the impact of a multi-component degradation scenario. Journal of hazardous materials. 2019 Jun;372:61–68.
Journal cover image

Published In

Journal of hazardous materials

DOI

EISSN

1873-3336

ISSN

0304-3894

Publication Date

June 2019

Volume

372

Start / End Page

61 / 68

Related Subject Headings

  • Strategic, Defence & Security Studies
  • 41 Environmental sciences
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 05 Environmental Sciences
  • 03 Chemical Sciences