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김영진 ( Kim Yeong Jin ),임용성 ( Im Yong Seong ),신판세 ( Sin Pan Se ),현길수 ( Hyeon Gil Su ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.1
N/A The formation of disinfection by-products(DBPs) is one of the major issue in drinking water quality control. A significant amount of Trihalomethanes (THMs) and Haloacetic acids (HAAs) are produced by chlorinating the raw water or organic compounds extracted from natural water. With an advances in the analysis of chlorination by-products and their health effects, numerous organic halides such as HAAs, THMs, haloacetonitriles. etc have been identified at low level. Animal studies have demonstrated that dichloroacetic acid(DCAA) causes a carcinogen. A five kinds of HAAs such as MCAA, DCAA, TCAA, MBAA and DBAA are regulated under the U.S Environmental Protection Agency`s proposed Disinfectant Disinfection By-Products Rule. The goal of this study was to control DBPs contained in the drinking water from HM, DS, MJ and PES water treatment plants(WTP). The results obtained from this study are as fallows : for HMWTP, DSWTP, and MJWTP, the THMs concentrations were 22∼29,%/L, 22∼28㎍/L, and 6∼8㎍/L, and the HAAs concentrations were 1∼22㎍/L, 1∼16㎍/L. and 0.4∼16㎍/L, respectively, which were very low value compared to USEPA rule of DBPs. The HAAs was seen to be decreased rapidly in the sand filter of the WTP. This was caused by the HAAs biodegraded in the sand filter. In addition, HAAs can be removed in the advanced treatment process although an adsoption of the THMs is gone.
김영진(Young Jin Kim),임용승(Yong Seung Im),김용순(Yong Soon Kim),권동민(Dong Min Kwon),신판세(Pan Se Sin) 한국수처리학회 2002 한국수처리학회지 Vol.10 No.2
N/A The formation of disinfection by-products(DBPs) is one of the major issue for drinking water quality control. Whenever raw water or organic compounds extracted from natural water are chlorinated, significant concentrations of Trihalomethanes (THMs) and Haloacetic acids (HAAs) are produced. With recent advances in the analysis of chlorination by-products and their health effects, numerous organic halides HAAs, THMs, haloacetonitriles, etc have been identified at low level. Animal studies have demonstrated that dichloroacetic acid(DCAA) causes carcinogen. Five of HAAs (MCAA, DCAA, TCAA, MBAA and DBAA) are regulated under the U.S Environmental Protection Agency`s proposed Disinfectant/Disinfection By-Products Rule. The goal of this study was to control HAAs contaimed in Pusan`s drinking water. The results obtained from this study are as fellow. 1) HAAs concentrations of H, D, M water treatment plants are 1∼22㎍/l (6.8), 1∼16㎍/l (8.4), 0.4∼16㎍/l (2.6) respectively. This results is very low value comparing to USEPA DBPs Rule of HAAs. 2) HAAs speciation in Pusan`s drinking water is generally in the order : DCAA(41∼51%) > TCAA (23∼38%) > DBAA(18∼30%) > MBAA(2∼5%) > MCAA(O%), which shows DCAA and TCAA were the dominant compounds. 3) HAAs was seen to be decreased rapidly in the sand filter of a water treatment plant. This was caused by the HAAs biodegraded in the sand filter. In addition, HAAs can be removed in the advanced treatment process althought an adsoption of the THMs is gone. 4) From the results of the batch experiment, HAAs was seen to be removed by the biodegradation by microorgarnism in the sand filter. 5) THMs and HAAs in distribution system were 1.3∼1.6. 1.4∼2.1 times higher than in final water in plant, respectively so it can be concluded that the longer distance from the plant, the more concentrations of them.
김상구 ( Kim Sang Gu ),손희종 ( Son Hui Jong ),노재순 ( No Jae Sun ),최동훈 ( Choe Dong Hun ),배석문 ( Bae Seog Mun ),권기원 ( Kwon Gi Won ),신판세 ( Sin Pan Se ),김원경 ( Kim Won Gyeong ) 한국수처리학회 2003 한국수처리학회지 Vol.11 No.3
N/A The performance of a novel magnetic ion exchange resin supplied by its manufacturer Orica Australia(M1EX? DOC Resin) in terms of the removal of dissolved organic carbon(DOC). reduction in disinfection by-product formation potential, and effects on the removal of turbidity has been investigated. Two water samples(Maeri and prepared raw waters) were first treated with MIEX? at various doses and contact times, followed by conventional coagulation. Measurements of DOC. UV-254. THMFP, HAAFP and turbidity were made at each stage. In addition, readings of anions, including Br- were also obtained. For comparison, conventional coagulation/sedimentation alone was carried out using fixed levels of coagulant of 60㎎/L for Maeri water, and 100 ㎎/l for prepared water respectively. The UV-254 and DOC removals by MIEX? treatment were shown to be superior to cuagulation, ie better by 11-40% and 20-26% for Maeri and prepared raw water respectively. Further coagulation of the 10 mL/L MIEX? treated waters to control turbidity increased the DOC removal by -16%. As MIEX? dose and contact time increased, the additional DOC removal by coagulation showed corresponding decreases. The DOC removal efficiencies by MIEX? treatment alone were 71% and 82% with Maeri and prepared raw waters respectively. while the corresponding figures achieved by coagulation alone were 48% and 49% respectively. The combination of MIEX? and coagulation(main1y to achieve treatment standard for turbidity) in series yielded DOC removal efficiencies of 83% and 88% for the two waters. The reduction in THMFP by MIEX? treatment was better than that achieved by coagulation by 20-49%. More significantly, MIEX? treatment delivered a reduction of HAAFP which was 50% better than that delivered by coagulation. However, the combination of MIEX? and coagulation, when compared with MIEX? treatment alone, showed only marginal improvements in THMFP and HAAFP. indicating that as a pre-treatment method, MIEX? was particularly effective in removing DBP precursors. MIEX? treatment significantly reduced the dose of coagulant which would be needed for turbidity control. In order to reduce the turbidity from 18(Maeri water) and 27 NTU(prepared raw water) to ( 2 NTU, MIEX? pre-treated water samples only required coagulant doses which were up to 80% less than those involved when coagulation alone was used. However. after MIEX? pre-treatment, low alkalinity waters(1ess than 20 ㎎/L) only showed a slight decrease in turbidity. Most anions in water decreased with MIEX? dose and contact time with Br- showing a reduction of up to 70% while Cl- showing a slight increase due to the effect of resin regeneration. This research showed that for Maeri water(5 ㎎/L DOC and 30 NTU), the pre-treatment with MIEX? dose of 10-16 mL/L and a contact time of 30 minutes yielded optimum results for DOC and DBP control. Coagulant dosage for turbidity control in this case decreased by as much as 20-30 ㎎/L(80%).