Stabilization of lead and copper contaminated firing range soil using calcined oyster shells and fly ash
- Authors
- Moon, Deok Hyun; Park, Jae-Woo; Cheong, Kyung Hoon; Hyun, Seunghun; Koutsospyros, Agamemnon; Park, Jeong-Hun; Ok, Yong Sik
- Issue Date
- Dec-2013
- Publisher
- SPRINGER
- Keywords
- Lead; Copper; Stabilization; Oyster shell; Fly ash
- Citation
- ENVIRONMENTAL GEOCHEMISTRY AND HEALTH, v.35, no.6, pp.705 - 714
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
- Volume
- 35
- Number
- 6
- Start Page
- 705
- End Page
- 714
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/161280
- DOI
- 10.1007/s10653-013-9528-9
- ISSN
- 0269-4042
- Abstract
- A stabilization/solidification treatment scheme was devised to stabilize Pb and Cu contaminated soil from a firing range using renewable waste resources as additives, namely waste oyster shells (WOS) and fly ash (FA). The WOS, serving as the primary stabilizing agent, was pre-treated at a high temperature to activate quicklime from calcite. Class C FA was used as a secondary additive along with the calcined oyster shells (COS). The effectiveness of the treatment was evaluated by means of the toxicity characteristic leaching procedure (TCLP) and the 0.1 M HCl extraction tests following a curing period of 28 days. The combined treatment with 10 wt% COS and 5 wt% FA cause a significant reduction in Pb (> 98 %) and Cu (> 96 %) leachability which was indicated by the results from both extraction tests (TCLP and 0.1 M HCl). Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX) analyses are used to investigate the mechanism responsible for Pb and Cu stabilization. SEM-EDX results indicate that effective Pb and Cu immobilization using the combined COS-FA treatment is most probably associated with ettringite and pozzolanic reaction products. The treatment results suggest that the combined COS-FA treatment is a cost effective method for the stabilization of firing range soil.
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