| Title |
HAAs Formation by Chlorine Dose and Reaction Time and The Removal Effect of Precursors by The Advanced Oxidation Processes |
| Authors |
김경숙 ( Kim Gyeong Sug ) ; 오병수 ( O Byeong Su ) ; 주설 ( Ju Seol ) ; 강준원 ( Kang Jun Won ) |
| Keywords |
Haloacetic Acids; Speciation; Ozone; UV; Ozone/UV |
| Abstract |
This study investigated the effect of chlorine dose and chlorine reaction time for the formation of haloacetic acids (HAAs). According to the results, HAA formation was highly affected by chlorine dose and chlorine reaction time. HAA formation reached a plateau value at 30 ㎎/L of chlorine dose and 24 hr of chlorine reaction time. For the speciation of formed HAAs in the test water, the concentration of brominated-HAAs was significantly lower than that of chlorinated-HAAs because of low level of bromide ion concentration in the test water. It also investigated the removal efficiency of HAA precursors by several unit processes, such as ozone alone, UV alone, and combined ozone/UV system. Of them, ozone/UV system was proved as the best process to control the HAAs formation. The increase of the brominated-HAAs was observed during ozonation with and without UV irradiation showing the slight increase of total HAA concentrations. |