| 벤토나이트에 의한 해양오염퇴적물 내 중금속 안정화 특성 |
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신우석, 나규리, 김영기 |
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| Stabilization of Heavy Metals in Contaminated Marine Sediment using Bentonite |
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Woo Seok Shin, Kyu Ri Na, Young Kee Kim |
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| Abstract |
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In this study, stabilization treatment of heavy metals such as Ni, Cu, Pb, and Zn in contaminated marine sediment was achieved using bentonite. Stabilization experiment was accomplished by wet-curing with bentonite for 150 days. From the sequential extraction results of heavy metals, it was observed that the easily extractable fraction (exchangeable, carbonate, and oxides forms) of Ni, Cu, Pb, and Zn in a treated sediment decreased to 8.5%, 5.6%, 19.2%, and 28.2%, respectively, compared with untreated sediment. Moreover, the TCLP(Toxicity Characteristic Leaching Procedure) results evaluating efficiency of extraction reduction of heavy metals showed that extraction of heavy metals reduced drastically to 95.7%, 96.8%, 99.2%, 85.9% for Ni, Cu, Pb, and Zn by stabilization when compared to untreated sediment. From these results, we can confirm that bentonite as a capping material exhibits good stabilization of heavy metals in contaminated marine sediment. |
| Key Words:
Bentonite;Stabilization;Capping Material;Marine Contaminated Sediment;Heavy Metals |
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