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박선구,류재근 ( Sun Ku Park,Jae Keun Ryu ) 한국물환경학회 1998 한국물환경학회지 Vol.14 No.2
This study was performed to change Mn method of Korea at present into Cr method comparing testing methods in each country for the measurement of COD. Office testing method for water quality contamination was newly proposed that advantages were considered by comparing, assessing and evaluating the JIS of Japan, standard method(closed reflux, open reflux) and EPA of U.S.A., Experiments for the KHP standards, lake water and effluent water drained from wastes treatment plant were carried out several times successively to certain reproducibility of each testing method, in result, standard deviation of experiment by proposed method has shown good results more than other ones. The COD of lake and stream water for Han river, Nakdong river, Kum river, and Yungsan river was measured by Mn and Cr method, the concentration of COD was different in each sampling site. In case of lake water with class I∼II, the ratio of COD resulted from two methods was 2∼3times and concentration of COD by Cr method was about 10ppm. The concentration of COD by Cr method was 35ppm at the site contaminated with polluants considerably. Raw wastewater and effluent water of 15 discharge sources for 6 industries were measured for the COD by Mn and Cr method to compare the difference of two methods. The ratio of COD between Mn and Cr method for raw wastewater and effluent water was 2∼4times except industrial chemistry, leather and fur industry. The experiment was also performed to compare oxidation percent for six organic compounds including benzene, Cr method(above 95%) was higher than Mn method(60∼65%).
박선구(Sun Ku Park),류재근(Jae Kyun Ryu) 한국물환경학회 1999 한국물환경학회지 Vol.15 No.4
Twenty organic chemical substances (Table 2) were isolated from untreated wastewater, as well as treated wastewater, collected at 76 companys of 9 industry group located in the basin of Youngsan River. Those organic compounds were analyzed by Gas Chromatography/Mass Spectrometry(GC/MS) and confirmed through comparison with each standard reagents. Phenol, which was not detected in the raw wastewater, was identified in the effluent of treatment facility, indicating that phenol is generated in the course of industrial wastewater treatment in chemistry company.
이동석,민병섭,박선구,김정화,류재근,Rhee, Dong-Seok,Min, Byoung-Seob,Park, Sun-Ku,Kim, Joung-Hwa,Rhyu, Jae-Keun 한국물환경학회 2004 한국물환경학회지 Vol.32 No.2
This study was carried out to investigate the formation of DBPs(Disinfection By-products) such as trihalomethane(THMs) and haloacetic acid(HAAs) by chlorination in raw water and finished water of Water Treatment Plant(WTP). The formation of THMs was increased with the increase of pH and reaction time. HAAs was found as a high formation at a pH 7 and low formation at pH 9. THMFP(Trihalomethane Formation Potential) was the highest formation potential in raw water of Pu-1 and the lowest in raw water of Pa-1. In case of HAAFP(Haloacetic acid formation potential), So-1 showed the highest value, while Pa-1 showed the lowest value. It was investigated the relationship between HAAs and organic matters which were described as DOC(dissolved organic carbon) and $UV_{254}$. In both DOC and $UV_{254}$ versus HAAFP, Pu-1 showed the good correlation coefficients($r^2$) with 0.95 and 0.84, respectively. For three WTP investigated, DBPs(THMs + HAAs) was shown over the range of $42.00{\sim}49.36{\mu}g/L$. This result might be due to the different characteristic of organic matters in raw water and the difference of chlorine dosage for a water treatment.