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- Title
Disposal of heavy metal-contaminated sediment from Ulsan Bay, South Korea: treatment processes and legal framework.
- Authors
Oh, Seok-Young; Cha, Soo-Won; Kim, Ick-Hyun; Lee, Hyun-Woo; Kang, Seung-Goo; Choi, Sol-Ji
- Abstract
The effectiveness of two different management schemes to dispose of heavy metal-contaminated sediments from Ulsan Bay, South Korea, soil washing and solidification/stabilization, were evaluated through a series of analyses. NaOH proved to be an effective washing reagent for As, extracting 75% of the As in sediment samples. EDTA was found to significantly enhance the extraction of Cu, Pb and Zn. However, complete removal of any metals was not achieved even after application of 100 mM concentrations of washing reagents. Therefore, a solidification/stabilization technique was applied to dredged sediment samples using ordinary Portland cement (1-40%) and fly ash (∼20%). Solidified sediments did not release meaningful amount of the metals via leaching tests. Our results suggest that solidification/stabilization is a better option for effective disposal of heavy metal-contaminated sediments than soil washing. A legal framework for the treatment of hazardous wastes and contaminated soils in Korea is discussed.
- Subjects
ULSAN Bay (Korea); SOUTH Korea; FLY ash; WASTE products; SOIL washing; SOLIDIFICATION; SOIL stabilization; HEAVY metals; SOIL composition
- Publication
Water & Environment Journal, 2011, Vol 25, Issue 4, p445
- ISSN
1747-6585
- Publication type
Article
- DOI
10.1111/j.1747-6593.2010.00231.x