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Improving Soil Washing/flushing Process using a Mixture of Organic/inorganic Extractant for Remediation of Cadmium (Cd) and Copper (Cu) Contaminated Soil  

Lee, Hong-Kyun (Department of Chemical Engineering, Hanyang University)
Kim, Dong-Hyun (Department of Chemical Engineering, Hanyang University)
Jo, Young-Hoon (Department of Chemical Engineering, Hanyang University)
Do, Si-Hyun (Department of Chemical Engineering, Hanyang University)
Lee, Jong-Yeol (Department of Chemical Engineering, Hanyang University)
Kong, Sung-Ho (Department of Chemical Engineering, Hanyang University)
Publication Information
Journal of Soil and Groundwater Environment / v.14, no.2, 2009 , pp. 17-25 More about this Journal
Abstract
The applicability of soil washing/flushing to treat a contaminated soil with cadmium (Cd) and copper (Cu) using a mixture of organic/inorganic extractant was evaluated in laboratory-scale batch and column tests. Citric acid was the effective extractant to remove Cd and Cu from the soil among various organic acids except EDTA. Carbonic acid was chosen as inorganic extractant which was not only low toxicity to environment, but also increasing soil permeability. Moreover, the optimum ratio of organic and inorganic extractant to remove Cd and Cu was 10 : 1, and this ratio of organic and inorganic extractant achieved removal efficiencies of Cd (46%) and Cu (39%), respectively. The increasing flow rate of extractant could explain the phenomena of soil packing when carbonic acid was used with organic extractant (i.e. EDTA and citric acid). Therefore, a mixture of organic extractant with inorganic extractant, especially carbonic acid, could resolve a problem of soil packing when this extractant was applied to a field application to remove Cd and Cu using in-situ soil flushing process.
Keywords
Cadmium; copper; soil washing/flushing; citric Acid; Carbonic acid;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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