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Stabilization of Pb Contaminated Army Firing Range Soil using Calcined Waste Oyster Shells  

Moon, Deok-Hyun (Hae Chun ETS, Inc.)
Cheong, Kyung-Hoon (Department of Environmental Engineering and BK21 Team for Biohydrogen Production, Chosun University)
Kim, Tae-Sung (Hae Chun ETS, Inc.)
Khim, Jee-Hyeong (Department of Civil, Environmental and Architectural Engineering, Korea University)
Choi, Su-Bin (Hae Chun ETS, Inc.)
Ok, Yong-Sik (Department of Biological Environment, Kangwon National University)
Moon, Ok-Ran (Department of Environmental Engineering, Chosun University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.32, no.2, 2010 , pp. 185-192 More about this Journal
Abstract
The objective of this study was to investigate the effectiveness of stabilization for army firing range soil highly contaminated with Pb (total Pb: 29,000 mg/kg) using calcined waste oyster shells. The calcination was conducted to activate quicklime from calcite. In order to evaluate the effectiveness of calcination, both natural oyster shells (NOS) and calcined oyster shells (COS) were applied to the Pb contaminated soil. Stabilization was conducted by mixing the contaminated soil with oyster shell media at 5-20 wt% and cured for 28 days. Following 28 days of curing, Pb leachability was measured based on the Korean Standard Test method (0.1 N HCl extraction). The treatment results showed that the COS treatment outperformed the NOS treatment. All of the NOS treatments failed to meet the Korean warning standard of 100 mg/kg. However, the Pb concentrations were significantly reduced to 47 mg/kg and 3 mg/kg upon 15 wt% and 20 wt% COS treatments, respectively which passed the Korean warning standard. Moreover, -#20 mesh materials were more effective than the -#10 mesh materials in effectively reducing Pb leachability. The scanning electron microscopy (SEM)-energy dispersive X-ray spectroscopy (EDX) results indicated that Pb immobilization was strongly linked to Al and Si.
Keywords
Lead; Army; Firing range; Contaminated soil; Waste oyster shells; Stabilization;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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