Chemical kinetics and quantitative chemical analysis of some environmentally relevant systems
Abstract
Work on several environmentally important chemical systems is reported here. First, HOI disproportionation kinetics were studied in acidic solution; acetate inhibits the rate, but sulfate has no effect. Second, the reaction between methanal (formaldehyde) and chloramine was studied in a variety of buffer systems. The reaction proceeds as follows: NH2Cl + CH 2O → CH(OH)(NHCl) → CH2=NCl → ClCN; some steps experience general base assistance. Third, a new distribution-mixing-observation cell has been designed for pulsed-accelerated flow spectrophotometry. The new design reduces the number of connections. Fourth, several methods were adapted for the measurement of various chlorination byproducts (halohydrocarbons, halocarboxylates), ozonation byproducts (aldehydes) and perchlorate and then applied to real systems. Fifth, perchlorate is a relatively new contaminant and is found throughout the southwestern U.S. in natural water supplies. The development of a complexation electrospray ionization mass spectrometric method is discussed and applied to the analysis of water, plant tissue, and fertilizer, as a complementary approach to ion chromatography.
Degree
Ph.D.
Advisors
Margerum, Purdue University.
Subject Area
Chemistry|Analytical chemistry
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