Use of Differential Spectroscopy to Probe Reactions between Natural Organic Matter and Chlorinated OxidantsEPA Grant Number: R826645
Title: Use of Differential Spectroscopy to Probe Reactions between Natural Organic Matter and Chlorinated Oxidants
Investigators: Benjamin, Mark M. , Korshin, Gregory V.
Institution: University of Washington - Seattle
EPA Project Officer: Lasat, Mitch
Project Period: August 1, 1998 through July 31, 2001 (Extended to February 28, 2002)
Project Amount: $374,401
RFA: Exploratory Research - Environmental Chemistry (1998) RFA Text | Recipients Lists
Research Category: Sustainability , Land and Waste Management , Air , Engineering and Environmental Chemistry
This project will use differential UV spectroscopy to investigate the kinetics and pathways by which disinfection by-products are formed when chlorinated oxidants (e.g., HOCl, ClO2, NH2Cl) are contacted with natural organic matter in drinking water disinfection processes.
The approach involves application of differential spectroscopy to monitor the progress of the chlorination/ oxidation reaction. This technique, which has recently been developed in our laboratory, can generate data on DBP formation at a rate that is orders of magnitude faster than conventional methods, and at a cost that is orders of magnitude lower. Chlorination of both natural organic matter and model compounds will be studied.
The results of the research will be a better understanding of the intermediates that form in the DBP reaction sequence and the factors that affect the reaction stoichiometry and kinetics. Ideally, new techniques for modeling and monitoring the formation of DBPs will be developed.