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http://dx.doi.org/10.5394/KINPR.2015.39.4.345

Effect of the Applied Biostimulant Depth on the Bioremediation of Contaminated Coastal Sediment  

Woo, Jung-Hui (Nuclear Power Equipment Research Center, Korea Maritime and Oean University)
Subha, Bakthavachallam (Department of Environmental Engineering, Korea Maritime and Oean University)
Song, Young-Chae (Department of Environmental Engineering, Korea Maritime and Oean University)
Publication Information
Journal of Navigation and Port Research / v.39, no.4, 2015 , pp. 345-351 More about this Journal
Abstract
This study investigated the optimum depth for the application of bioremediation in contaminated coastal sediment using a lab scale column experiment. The biostimulants were placed in the top surface of the sediment facing seawater, 3cm, 6cm and 10cm of the depth from the surface, respectibely. During the experiment, the changes of organic pollutants and heavy metal fractions in the sediment were monitored in 1 month and 3month time intervals. The organic pollutants found during various analysis such as chemical oxygen demand, total solids and volatile solids, significantly reduced when the depth of the biostimulant was 3cm or less. In contrast, at a depth of over 6cm, the reduction of organic pollutants decreased, and the results were similar to the control. Heavy metals fractions in the sediment also changed with the depth of the biostimulants. The exchangeable fraction of the metals was quite reduced at the sediment surface in the column, but the organic bound and residual fractions considerably increased at a depth of 3cm. Based on this study, the optimum biostimulants depth for in-situ bioremediation of contaminant coastal sediment is 3cm from the sediment surface.
Keywords
Contaminated coastal sediment; bioremediation; Biostimulat; Applied depth; Heavy metal; Organic pollutants;
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Times Cited By KSCI : 2  (Citation Analysis)
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