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http://dx.doi.org/10.7846/JKOSMEE.2014.17.1.1

Application of Granulated Coal Ash for Remediation of Coastal Sediment  

Kim, Kyunghoi (Graduate School of Engineering, Hiroshima University)
Lee, In-Cheol (Department of Ocean Engineering, Pukyong National University)
Ryu, Sung-Hoon (Department of Ocean Engineering, Pukyong National University)
Saito, Tadashi (The Chugoku Electric Power Co., Inc.)
Hibino, Tadashi (Graduate School of Engineering, Hiroshima University)
Publication Information
Journal of the Korean Society for Marine Environment & Energy / v.17, no.1, 2014 , pp. 1-7 More about this Journal
Abstract
This paper aims to explain the safety assessment and remediation mechanism of Granulated Coal Ash (GCA) as a material for the remediation of coastal sediments and to evaluate the improvement of the sediment in Kaita Bay, where GCA was applied. The concentrations of heavy metal contained in GCA and the dissolved amounts of heavy metal from GCA satisfied the criteria for soil and water pollution in Japan. The mechanisms on the remediation of coastal sediments using GCA is summarized as follows; (1) removal of phosphate and hydrogen sulfide (2) neutralization of acidic sediment (3) oxidation of reductive sediment (4) increase of water permeability (5) increase of soil strength (6) material for a base of seagrass. From the results obtained from the field experiment carried out in Kaita Bay, it was clarified that GCA is a promizing material for remediation of coastal sediment. This remediation technology can contribute to promote waste reduction in society and to decrease cost of coastal sediment remediation by applying GCA in other polluted coastal areas.
Keywords
Granulated Coal Ash; Remediation of Coastal Sediment; Hydrogen Sulfide; Phosphate;
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