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Use of Differential Spectroscopy to Probe Reactions between Natural Organic Matter and Chlorinated Oxidants

EPA 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: Krishnan, Bala S.
Project Period: August 1, 1998 through July 31, 2001 (Extended to February 28, 2002)
Project Amount: $374,401
RFA: Exploratory Research - Environmental Chemistry (1998)
Research Category: Engineering and Environmental Chemistry

Description:

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.

Approach:

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.

Expected Results:

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.

Publications and Presentations:

Publications have been submitted on this project: View all 11 publications for this project

Journal Articles:

Journal Articles have been submitted on this project: View all 2 journal articles for this project

Supplemental Keywords:

drinking water, disinfection, chloroform, haloacetic acids, trihalomethanes, disinfection by-products, , Toxics, Water, Air, Scientific Discipline, RFA, Electron Microscopy, Engineering, Chemistry, & Physics, Drinking Water, Microbiology, Ecological Risk Assessment, Chemistry, Environmental Chemistry, National Recommended Water Quality, drinking water system, drinking water contaminants, treatment, water quality, haloacetic acids, chlorinated oxidants, drinking water distribution system, stochiometry, chlorinated DBPs, chlorination, DBP risk management, monitoring, oxidation, trihalomethane, chemical kinetics, disinfection byproducts (DBP), disinfection byproducts (DPBs), natural organic matter, chlorinated by products, public water systems, drinking water treatment, water treatment, kinetics, spectroscopic studies, community water system, haloacetonitriles, UV treatment

Progress and Final Reports:
1999 Progress Report
Final Report

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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.

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