| Title |
Characteristics of Aqueous Organic Matter and Disinfection By-products(DBPs) Formation Potentials in Guem River |
| Authors |
유순주 ( Yu Sun Ju ) ; 하성룡 ( Ha Seong Lyong ) ; 황종연 ( Hwang Jong Yeon ) ; 김창수 ( Kim Chang Su ) |
| Keywords |
NOM; SUVA; Apparent molecular weight cutoff; DBPs; THMFP; HAAFP |
| Abstract |
This study aims to identify the relationship between characteristics of aqueous organic matter and chlorination by-products formation potential according to spatial and temporal effect in Daecheong reservoir as well as Guem river. To evaluate distribution and characteristics of dissolved organics as precursor of disinfection by-products, specific ultraviolet absorbance (SUVA) and apparent molecular weight cutoff were investigated at raw water and treated unit water in water treatment facilities. Disinfection by-products formation potentials, trihalomethanes (THMs) and haloacetic acid (dichloroacetic acid, trichloroacetic acid), were measured at 7days incubation time. The findings are as follows. SUVA, which represents the portion of humic substance was found to be ranged with 1.41-5.55(average 2.60) and 1.52-4.77(average 2.45) in reservoir and river, respectively. The molecular weight less than 1,000 which includes the molecular weight of hydrophilic organic matter was occupied with 66.4% and 64.1% in river and reservoir, respectively. While the molecular weight of 100,000-1,000 including humic substances was ranged with 14.7% and 17.6% in reservoir and river, respectively. Trihalomethane formation potential (THMFP) showed good correlation with ultraviolet absorbance (UV245) and SUVA in reservoir. In river, however, it showed good relationship between DOC and UV254. It was understood that THMFP was strongly related to the contents of hydrophobic organic matter among natural organic matter (NOM). On the other hand, haloacetic acid formation potential(HAAFP) showed quite good consistency with organic matter of 1,000Mw as well as low molecular weight among humic substances. |