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Feasibility Study on the Remediation of Zn-contaminated Railroad Soil using Various Washing Agents  

Park, Sung-Woo (Department of Environmental Engineering, Kumoh National Institute of Technology)
Lee, Jae-Young (Korea Railroad Research Institute)
Kwon, Tae-Soon (Korea Railroad Research Institute)
Kim, Kyung-Jo (Department of Environmental Engineering, Kumoh National Institute of Technology)
Chung, Keun-Yook (Chungbuk National University)
Baek, Ki-Tae (Department of Environmental Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of Soil and Groundwater Environment / v.14, no.1, 2009 , pp. 78-82 More about this Journal
Abstract
In this study, the feasibility of soil washing and soil flushing was investigated to treat Zn-contaminated railroad 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. Particularly, EDTA, well known as the most effective washing agent for removal of heavy metals from soil, was not efficient to remove zinc in this study. Among washing agents tested in this study, HCl was the most effective. However, it is not effective to use HCl solution over 0.1 M concentration. Sequential process using HCl was effective to enhance the removal efficiency of zinc. In column test, the removal efficiency of Zn was 27%. Accordingly, it is feasible to treat Zn-contaminated railroad soil using soil washing or flushing with HCI.
Keywords
Railroad-contaminated soil; Zinc; Soil washing; Soil flushing;
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Times Cited By KSCI : 9  (Citation Analysis)
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