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중금속 오염 철도 토양의 세척에 의한 정화 타당성 연구
백기태(Kitae Baek),신민철(Min-Chul Shin),현충호(Chung-Ho Hyun),이재영(Jae-Young Lee),강해숙(Hae-Sook Kang) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
The feasibility of soil washing was investigated in the laboratory to treat heavy metals-contaminated railway soil. Various organic acids including ethylene diamine tetraacetic acid (EDTA) and citric acid as well as inorganic acids such as hydrochloric acid (HCl) and phosphoric acid were tested to evaluate washing efficiency. Generally, inorganic acid showed higher removal efficiency compared to organic acids. Specially, EDTA, which are well known as most effective washing agent to remove heavy metals from soil, was not efficient to remove heavy metals in this study. Among washing agents tested in this study, HCl was most effective. The removal of Cd, Cu, and Pb was high, however, that for Zn and Ni was less than 30% with 0.5 M HCl. This difference comes from analytical methods (Korean Standard Test Method for Soil). Aqua regia was used to extract Zn and Ni, however 0.1 N HCl was used for other metals. As a result, simple washing technology is not effective, to treat railway contaminated soil with heavy metals.
백기태(Kitae Baek),신민철(Min-Chul Shin),박성우(Sung-Woo Park),류병곤(Byung-Gon Ryu),이재영(Jae-Young Lee) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
Railway-contaminated soil is categorized by total petroleum hydrocarbon(TPH)-related contamination and heavy-metal contamination. The sources of TPH are diesel and lubricant. In this study, the feasibility of soil washing, chemical oxidation and ultra-sonication were investigated to treat lubricant-contaminated railway soil. tergitol, a non-ionic surfactant, was investigated as a washing agent. However, it is not effective to remove lubricant from soil even though tergitol is most effective washing agent for diesel-contaminated soil. Addition of alcohols with surfactant enhanced slightly washing efficiency of the lubricant-contaminated soil. To remediate railway-contaminated soil, source of pollution should be considered.
위해성 기반 오염부지관리를 위한 정책 및 기술개발 방향
조명현,김도형,백기태,Cho, Myung-Hyun,Kim, Do-Hyung,Baek, Kitae 한국지하수토양환경학회 2017 지하수토양환경 Vol.22 No.5
Korea and other countries have made various efforts to preserve soil. During the past several decades, Korea has implemented various policies on soil conservation practices; however, those policies have often lacked consideration of human and ecosystem risk management. while other countries have practiced various policies closely related to risk-based management for contaminated sites. Therefore, there is a great need for a paradigm shift of policy to better manage contaminated sites in risk-based strategies, while applying different management plans for soil and groundwater. In addition, the new policies should be administered with provision to improve soil health and related functions in ecosystem. This study has reviewed the trend in relevant policies in Korea and foreign countries to suggest the future policy directions for contaminated site management in Korea. For better management of contaminated sites, coherent policy that could complement the law, system, and relevant technology is required.
전기동력학적 정화기술 적용을 위한 최적의 전해질 선택 및 전극간의 거리 평가
박근용,김우승,김도형,양중석,백기태,Park, Geun-Yong,Kim, Woo-Seung,Kim, Do-Hyung,Yang, Jung-Seok,Baek, Kitae 한국지하수토양환경학회 2013 지하수토양환경 Vol.18 No.1
The influence of processing fluids and electrode spacing on the electrokinetic process was evaluated to remediate As-, Cu-, Pb-contaminated soil. Single and mixture of sodium citrate, EDTA and NaOH was used to investigate the metal extraction. EDTA for washing reagent showed the highest removal efficiency. Based on the extraction result, the electrode spacing (20, 40, 60 cm) on the electrokinetic process was investigated to remove the multi-metals from soil. The highest removal was observed at the experiment with 60 cm of electrode spacing, however, the correlation between electrode spacing and removal of metals was not clear. The electrode spacing influenced the amount of accumulated electro-osmotic flow. BCR sequential extraction showed that electrokinetic process removed the fractionation of metals bound to Fe-Mn oxyhydroxide.