Comprehensive Screening Study of Pesticide Degradation via Oxidation and Hydrolysis
This comprehensive study focused on the reactivity of a set of 62 pesticides via oxidization by free chlorine, monochloramine, chlorine dioxide, hydrogen peroxide, ozone, and permanganate; photodegradation with UV254; and hydrolysis at pH 2, 7, and 12. Samples were analyzed using direct injection liquid chromatography-mass spectrometry detection or gas chromatography-electron capture detection after liquid-liquid extraction. Many pesticides were reactive via hydrolysis and/or chlorination and ozonation mechanisms under typical drinking water treatment conditions, with less reactivity exhibited on average for chlorine dioxide, monochloramine, hydrogen peroxide, and UV254. The pyrazole and organophosphorous pesticides were most reactive in general, whereas carbamates and others were less reactive. The screening study provides guidance for the pesticide/oxidation systems that are most likely to lead to degradates in water treatment and the environment.
E. F. Chamberlain et al., "Comprehensive Screening Study of Pesticide Degradation via Oxidation and Hydrolysis," Journal of Agricultural and Food Chemistry, vol. 60, no. 1, pp. 354-363, American Chemical Society (ACS), Jan 2012.
The definitive version is available at http://dx.doi.org/10.1021/jf2033158
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Agricultural Chemicals; Chemistry; Chlorine; Chlorine Dioxides; Comprehensive Studies; Degradation; Direct Injection; Drinking Water; Free Chlorine; Gas Chromatography; Hydrogen; Hydrogen Peroxide; Hydrogen-Ion Concentration; Hydrolysis; Kinetics; Lead Removal (Water Treatment); Liquid Chromatography; Liquid-liquid Extraction; Liquids; Mass Spectrometry; Monochloramine; Organophosphorous Pesticides; Oxidation; Oxidation Reduction Reaction; Oxidization; Ozone; Ozone Water Treatment; Ozonization; Pesticide; Pesticide Degradation; PH; Photodegradation; Potable Water; Pyrazoles; Solvent Extraction; Water Pollution Control
International Standard Serial Number (ISSN)
Article - Journal
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