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하천시설 정보관리 표준화 방안제시 및 활용에 관한 연구
김광기 ( Kim Kwang-ki ),제갈선동 ( Chegal Sun-dong ),권동식 ( Kwon Dong-sik ),김동현 ( Kim Dong-hyeon ),이승오 ( Lee Seung-o ) 한국구조물진단유지관리공학회 2021 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.25 No.2
국가 주요 기반시설을 생애주기 관점에서 관리하고 소요재원의 확보근거를 마련하고자「지속가능한 기반시설 관리 기본법」이 2020년 시행되고 있으며, 관련법에 의거하여 15종의 인프라 기반시설에 대한 인프라 총조사사업(국토안전관리원)이 수행중에 있다. 본 연구에서는 기반시설중 하천시설에 대한 특성, 데이터 구축의 한계를 조사후 정보관리 표준화 방법 및 구축된 데이터에 대한 활용방안을 제안하고자 한다.
건강위해성 평가에 의한 정수용 수처리제의 불순물 관리 기준 설정 방법에 관한 연구
정용 ( Yong Chung ),백영석 ( Young Seog Beck ),권동식 ( Dong Sik Kwon ),이기공 ( Ki Gong Lee ),강형석 ( Hyeong Seok Kang ) 한국물환경학회 2004 한국물환경학회지 Vol.20 No.5
The principle and methodology of risk assessment was applied to establish the quality standard of potential impurities of drinking water treatment chemicals. The impurities(arsenic, lead, cadmium, chromium, mercury, etc.) are regulated as the contained quantity of chemicals in Korea while they are regulated as the quality standard with the idea of 10% of the national safety drinking water standard in U.S.A(NSF) and Japan(JWWA). According to risk assessment of the current standard implemented in Korea, the excess cancer risk of arsenic and lead were determined in around 10^(-5) and the hazard quotient(HQ) of cadmium and chromium were below 10^(-2), respectively. And the standard concentration of the impurities are regulated as much as 2%~6% of the national drinking water quality standard. The values are more enforced rather than the standards in U.S.A(NSF) and Japan(JWWA) regulating the concentration of impurities the 10% of the national drinking water quality standard. We conclude that the impurities standard of drinking water treatment chemicals should be reconsidered comprehensively concerning the national safety drinking water quality standard and risk assessment.
백영석,송민형,정경훈,권동식,이기공 한국물환경학회 2004 한국물환경학회지 Vol.20 No.3
This study was performed to investigate the disinfection efficiency and the formation characteristics of disinfection by-products(DBPs) by chlorination in the sewage effluent. The effluent was sampled from the sewage treatment plants operated in the activated sludge process and the advanced sewage process. The type of DBPs investigated were Trihalomethanes(THMs), Dichloroacetonitrile(DCAN), Chloral hydrate(CH), Dichloroacetic acid(DCAA), Trichloroacetic acid(TCAA). Major findings are as follows. First, the optimum injection concentration for chlorination in sewage effluent were found to be in the range 0.5 ~ 1.0 ㎎ Cl₂/L. Also, It was found that the chlorine dosage in the effluent of activated sludge process was higher than in the effluent of advanced sewage process. Second, the maximum formation concentration of THMs were 12.7 μg/L. The THMs formation reaction was finished in a short time of several seconds and chloroform was mainly formed. Also, it was found that the concentration of ammonium nitrogen is higher, the concentration of THMs is lower. Third, it was found that DCAA and TCAA were mainly formed as DBPs by disinfection.