| Abstract |
| Volatile organic compounds (VOCs) as a micropollutant has been gradually increased in river water using as a drinking water source. This phenomenon has required to reduce VOCs in treated water by advanced water treatment system. The objective of this study, therefore was to investigate the influence of filtration time of granular activated carbon (GAC) on VOCs removal from drinking water. Column tests (volume 150 mL) packed with about 40 mL of GAC were carried out with artificial water using real river water. Applied empty bed contact time (EBCT) of GAC bed was 15 min. Influent VOCs concentrations were in the range of 1,1-dichloroethylene (1,1-DCE) <210 ㎍/L, 1,1,1- trichloroethane(1,1,1-TCA) <430 ㎍/L, carbon tetrachloride (CT) <25 ㎍/L, trichloroethylene (TCE) <350 ㎍/L, and tetrachloroethylene (PCE) <85 ㎍/L, and xylene <810 ㎍/L. As a result, the adsorption of the GAC bed filtrated during 3 years at bed volume (BV) of 192 below achieved the high removal for VOCs with removal efficiencies of approximately 94-97% except 1,1-DCE, 1,1,1-TCA and CT with removal of 72-86%. Removal of an aged GAC bed decreased with increasing BV, while the removal of reactivation and virgin GAC beds increased with increasing BV. These results indicate that the reactivation and virgin GAC beds are able to remove VOCs more effectively compared with aged GAC bed. |
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| Key Words |
| VOCs, drinking water, GAC, filtration time, virgin, reactivation |
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