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우리나라 공공하수처리시설의 방류수 수질현황 분석을 통한 겨울철 방류수수질기준의 적정성 평가
엄철용 ( Chul Yong Um ),주경훈 ( Kyoung Hoon Chu ),윤주환 ( Zu Whan Yun ),최익훈 ( Ik Hoon Choi ),박재영 ( Jae Young Park ),이한샘 ( Han Saem Lee ),고광백 ( Kwang Baik Ko ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.4
In this study, from 2004 to 2008 influents and discharging effluents from 241 municipal public sewage treatment plants were surveyed. Statistics including average, Coefficient of Variation (CV) and Coefficient of Reliability (COR) for each season, time series analysis for removal efficiency and water quality of effluents, and a comparison of the effluent standards in Korea and other countries were presented. The average concentrations of TN and TP in influents. during winter season were 32.6 and 3.78 mg/L and during other season were 30.8 and 3.61 mg/L in 2008, respectively. The average TN concentration on the basis of the maximum monthly concentrations in the effluents during winter season ranged from 14.2~17.4 mg/L and during other season ranged from 12.2~14.8 mg/L. The TP concentration in the effluents depending on the each season was no big difference. TN removal efficiency decreased from Jan. to Feb. and TP removal efficiency decreased in Jan., Jun and July. Maximum COR during winter season were 0.61 but the COR for TN and TP during other season ranged from 0.96~1.48 and 1.09~1.81, respectively, due to big difference in the standard for TN and TP in effluents depending on the season. TN and TP standards for effluent of sewage treatment during winter season in Korea was much higher than those in other countries. Therefore the lower effluent standards during winter season is essential for the water quality improvement.
군사시설물 인근지역에서의 퍼클로레이트 오염수준 및 특성
최진수 ( Jin Su Choi ),엄철용 ( Chul Yong Um ),주경훈 ( Kyoung Hoon Chu ),함석현 ( Seok Heon Ham ),이종혁 ( Jong Hyeok Lee ),유성수 ( Sung Soo Yoo ),고광백 ( Kwang Baik Ko ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.3
Perchlorate is used in a number of applications as an oxidizer in solid propellants, munitions and fireworks and is one of the endocrine disrupting chemicals, which interferes with iodide uptake into the thyroid gland. The purpose of this study was to investigate perchlorate occurrence and distribution with a results of analysis of 94 samples collected from military facilities in Korea from October 11 to October 23, 2011. Overall, among all of the 94 samples analyzed, perchlorate was detected in 6.4% of the total number of samples above 4 μg/L (minimum reported limit) and the average concentration was 26.1 μg/L and the maximum concentration was 107.7 μg/L which was observed in surface water near manufacturing site of ammunition. By site classification, perchlorate was detected at one site in 4 manufacturing sites of ammunition and the maximum concentration was 107.7 μg/L which was six times higher than that in guideline for perchlorate in Nakdong River and resulted from point source discharge. Perchlorate was detected at 3 sites in 78 measurements for shooting area and the maximum concentration was 12.4 μg/L which was collected in dringking water and perchlorate in another sample was detected above MRL in shooting area was collected right away after shooting. These results showed that long term monitoring was needed considering weather conditions and shooting schedules.