Abstract
To study the formation potential of trihalomethanes (THMs) due to anthropogenic sources and effect of various precursors on potential of THM formation, surface treated water samples were collected from Ganga Barrage Water Treatment Plant, Kanpur (26 0 26 ' N, 80 0 20 ' E, 142 m altitude from mean sea level), India from January to June 2009. In May and June, all the THMs were identified. Trihalomethane formation potential (THMFP) values in May and June were found to be three times higher than those in January. The concentration of THM species was found to increase with chlorine dosages. The higher the reaction time leads to higher chloroform concentrations which is very prominent for higher chlorine dosages. DCBM (dichlorobromomethane) , BF (bromoform ) and DBCM (dibromochloromethane ) concentrations were nearly independent of the reaction time for more than 24 h for each considered chlorine dosage. With increase in chlorine dosages, the values of THMFP increased as the TOC (total organic carbon ) increased except February.
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