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KMID : 1024520120210091031
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Journal of the Environmental Sciences
2012 Volume.21 No. 9 p.1031 ~ p.1041
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Characteristics of Disinfection By-Products Formation in Chlorination of Principal Raw Waters for Drinking Water of Jeju Island, Korea
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Oh Sun-Mi
Park Tae-Hyun
Lee Min-Gyu
Kam Sang-Kyu
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Abstract
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This study was carried out to investigate the characteristics of disinfection by-products (DBPs-trihalomethanes (THMs),
haloacetic acids (HAAs) and haloacetonitriles (HANs) formation in chlorination of principal raw waters used for drinking
water on Jeju Island, Korea. The domestic water supply of other area and humic acid solution (HA) were used as a reference point. The effects of chlorine contact time, solution temperature and pH on DBPs formation potential (DBPFP) were investigated for raw waters. In addition, the effect of Br-was studied for HA. The DBPFP (THMFP, HAAFP and HANFP)
were increased with increasing chlorine contact time. Comparing the individual DBPFPs for raw waters, they decreased in
the order of HAAFP > THMFP ≥ HANFP. As the solution temperature was increased, the THMFP, HAAFP and HANFP
increased. With increasing the solution pH, the THMFP was increased, but HAAFP and HANFP were decreased. With the
addition of 0.3 mg/L Br- for HA, the DBPFP was increased and the major chemical species changed: from trichloromethane to dibromochloromethane and tribromomethane for THMs; from dichloroacetic acid and trichloroacetic acid to tribromoacetic acid for HAAs; and from dichloroacetonitrile to dibromoacetonitrile for HANs.
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KEYWORD
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Disinfection by-products, Trihalomethanes, Haloacetic acids, Haloacetonitriles, Chlorination of raw waters, Jeju Island
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