Abstract
Abstract : The chlorination of waters containing humic and other organic substances leads to the formation of trihalomethanes (THMS). These compounds are suspected carcinogens and pose a health hazard. Their formation and removal after chlorination is of interest to the Army because of the exclusive use of hypochlorite for disinfection. This paper describes studies on the removal of trihalomethanes from water using catalytic degradation. Of the several metals and metal oxides studied, Zn was found to be a superior catalyst. In the presence of Zn powder and .00075M H2 gas, four THMs (CHC13, CHC12Br, CHC1Br2, and CHBr3) all appear to dehalogenate in a relatively short period of time. The formation and degradation of reaction intermediates are discussed. Author keywords include: Catalytic degradation; Dehalogenation; Drinking water; Gas chromatography; Humic substances; Priority pollutants; Toxic substances; Trihalomethane; Water analysis; Water purification.
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