Camesano, Terri Anne
NF / Nancy, France
The goal of this project was to characterize the photocatalytic degradation of the pesticide thiamethoxam and the effects of the additives ammonium nitrate, humic acid, and river water on this degradation by measuring reaction kinetics, degree of mineralization, and toxicity. Experimental results were obtained for these methods via high performance liquid chromatography, total organic carbon (TOC) and total nitrogen (TN) analysis, and a lettuce test, respectively. Reaction rate coefficients were found to be approximately 0.0054 min-1. Nearly all samples decreased in TOC and increased in TN after degradation. Base thiamethoxam was shown to increase in toxicity after degradation. Overall, humic acid was found to be the most efficient additive for this reaction.
Worcester Polytechnic Institute
Major Qualifying Project
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