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Chloramination of Organophosphorus Pesticides Found in Drinking Water Sources
Citation:
DUIRK, S. E., L. M. DeSetto, G. M. Davis, C. C. Lindell, AND C. T. Cornelison. Chloramination of Organophosphorus Pesticides Found in Drinking Water Sources. WATER RESEARCH. Elsevier Science Ltd, New York, NY, 44(3):761-768, (2010).
Impact/Purpose:
see description
Description:
The degradation of commonly detected organophosphorus (OP) pesticides, in drinking water sources, was investigated under simulated chloramination conditions. Due to monochloramine autodecomposition, it is difficult to observe the direct reaction of monochloramine with each OP pesticide. Therefore, a model was developed to examine the reaction of monochloramine (NH2Cl) and dichloramine (NHCl2) with chlorpyrifos (CP), diazinon (DZ), and malathion (MA). Above pH 8, alkaline hydrolysis or the direct reaction with monochloramine were the primary degradation pathways responsible for the transformation of OP pesticides. This demonstrates the ability of models to be used as tools to elucidate degradation pathways and parameterize critical reaction parameters when used with select yet comprehensive data sets.
