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- E-ISSN 2288-8985
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- P-ISSN1225-0163
- E-ISSN2288-8985
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A Study on Formation Pattern of DBPs by Disinfection of Drinkig Raw Water
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2003, v.16 no.3, pp.249-260
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(2003). A Study on Formation Pattern of DBPs by Disinfection of Drinkig Raw Water. Analytical Science and Technology, 16(3), 249-260.
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Abstract
The disinfection of drinking water to control microbial contaminants results in the formation of secondary chemical contaminants, DBPs (disinfection by-products). It was studied the formation pattern of DBPs in drinking raw water after hypochlorite, chlorine disinfectant, was added in this study. It was determined TOC (total organic carbon), residual chlorine, turbidity and DBPs in raw water from Han-river during 1～14 days. Total DBPs was 101.3 ng/㎖ (789.6 nM) after 7days and THMs (trihalomethanes) are the dominant portion of 69%. HAAs (haloacetic acids) and chloral hydrate were determined 19% and 10% respectively, and HANs (haloacetonitriles), HKs (haloketones) and chloropicrin were analyzed in trace level. Chloroform occupied about 89% in total THMs in concentration of 61.5 ng/㎖, 95% of HANs was DCAN (dichloroacetonitrile) in 0.72 ng/㎖, 50% of HAAs was TCAA (trichloroacetic acid). On the study of relationship in formation among the DBPs, HANs forms with THMs competitively to the point of the concentration of 40 ng/㎖ of THMs. For HAAs, it did not show the prominent tendency. But it was observed that the compounds of large oxidation state are formed at first, and becomes to the compounds of low oxidation states.
- keywords
- chlorinated disinfection byproducts, THMs, HAAs, HANs
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