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철로 역사에서 발생 가능한 비점오염물질의 특성 및 관리방안
어성욱(Seong Wook Oa),김이형(Lee-Hyung Kim) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
Nonpoint pollutants were monitored on railway station land use. Lots of pollutant mass were washed-off in a first hour. The 95% confidence interval of pollutant concentrations ranges from 61.6 to 115.4 ㎎/L for TSS(mean= 88.50 ㎎/L), 103.8~244.1 ㎎/L for COD(mean= 174 ㎎/L) and 7.68~17.32 ㎎/L for Oil & Grease(mean= 12.5 ㎎/L). The various metals were also washed-off during storm runoff from railway station. The ranges of 95% confidence intervals were 39.2~84.0 ㎍/L for total Cu(mean= 61.6 ㎍/L), 14.0~25.8 ㎍/L for total Pb(mean= 19.9 ㎍/L) and 182.2~376.1 ㎍/L for total Zn(mean= 279.2 ㎍/L). As a result of this research, we concluded that up to 50% of the total pollutant mass can be removed when first 30% of the total flow are treating, and it can be a first flush criteria for best management practices.
폐 광산 지역 중금속 오염 토양의 석회안정화 적용 시 용출특성
어성욱 ( Seong Wook Oa ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.6
Pozzolanic-based stabilization/solidification (S/S) is an effective and economic remediation technology to immobilize heavy metals in contaminated soils. In this study, quick lime (CaO) was used to immobilize cadmium and zinc present in waste mine contaminated clayey sand soils. Addition of 5% quicklime to the contaminated soils effectively reduced heavy metal leachability after 2 bed volume operation below the drinking water regulatory limits. Lime addition was revealed to increase the immobilization for all heavy metals in tested pH ranges, so it could be an optimal choice for short-term remediation of heavy metal contaminated soil. The mass balances for these column tests show metal reduction of 92% for Cd and 87% for Zn of total resolved mass in case of 5% lime application.