Photochemical fate of quinone outside inhibitor fungicides

Winkels, Ronan

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https://hdl.handle.net/2142/109913 Copy

Description

Title

Photochemical fate of quinone outside inhibitor fungicides

Author(s)

Winkels, Ronan

Issue Date

2021-04-27

Keyword(s)

• fungicide
• agriculture

Abstract

Presented by: Ronan Winkels – student at University of St. Thomas, wink8063@stthomas.edu Co-authors: David M. Cwiertny, Kristine H. Wammer Abstract: Quinone Outside Inhibitor (QOI) fungicides are heavily used throughout the US in quantities of up to 16,000 kg per county. However, little is known about their environmental fate or potential for transformation via various environmentally-relevant processes. QOI are suspected to have neurodegenerative effects, making their potential appearance in agriculturally impacted drinking water supplies a serious threat. The goal of this study was to investigate the potential for direct and indirect phototransformation of four QOIs: dimoxystrobin, fluoxastrobin, kresoxim-methyl, and fluoxastrobin. Photolysis experiments were performed using a solar simulator in both aqueous solutions and bound to surfaces. In aqueous solutions these compounds were shown to undergo photolysis directly; photolysis rates were enhanced in the presence of nitrate and nitrite indicating indirect photolysis may also be important. Direct photolysis was also observed when on a solid surface. Additionally, the photoproducts in each of these conditions are more hydrophilic, potentially allowing them to more easily travel into a drinking water supply than the parent QOI. Biography: Senior undergraduate chemistry major at the University of St. Thomas

Series/Report Name or Number

2021 Emerging Contaminants in the Environment Conference (ECEC21)

Type of Resource

• text
• still image

Language

en

Permalink

• http://hdl.handle.net/2142/109913
• https://youtu.be/ugCCPBkXLdM

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