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Reviw Article:Organic Compound Resulting from Drinking Water Chiorination

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Author(s): H Pourmoghaddas

Journal: Journal of School of Public Health and Institute of Public Health Research
ISSN 1735-7586

Volume: 1;
Issue: 2;
Start page: 75;
Date: 2003;
Original page

Keywords: Trihalos | Haloacetic Acid | Chlorination

ABSTRACT
Organic chlorination by-products of drinking water have been considered public health issue and drinking water treatment problem since the 1974 reportng of the formation of chloroform and three other trihalomethanes (THMs) during chlorination. Much work has been accomplished since then to understand the factors influencing this formation and the treatment techniques to reduce the formation of chlorination by - products. Humic materials occure in surface waters, these naturally occuring organic compounds can serve as percursors to possible carcinogencs when fresh water supplies are subjected to chlorination for disinfection purposes. Over 780 compounds were formed by the reaction of chlorine with humic acids, which a large percentage are halogenated. The most commonly formed groups of these by-products are thrihalomethanes (4 compounds), Haloacetic Acids (9 compounds) and Haloacetonitrile (4 compounds). Total organic halogen (TOX) is an - easy method to determine the organic Halogen in water. GC and GC/MS methods are used to detrmine the chlorination by - products in water. In this review article the main chlorination by - products in drinking water, the factors which influences on the formation, the techniques in water treatment plants to reduce the concentration of chlorination by - products and the methods of determinations are discussed.

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