벤토나이트에 의한 해양오염퇴적물 내 중금속 안정화 특성
Stabilization of Heavy Metals in Contaminated Marine Sediment using Bentonite
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초록
본 연구에서는 해양오염퇴적물 내 Ni, Cu, Pb 및 Zn 등 중금속에 대하여 벤토나이트를 이용한 안정화 처리를 수행하였다. 안정화 실험은 해양오염퇴적물에 벤토나이트 첨가 후 150일간 습윤 양생 하여 실시하였다. 중금속 연속추출 결과로부터, 미처리 오염퇴적물과 비교해서 Ni, Cu, Pb 및 Zn은 용이하게 용출가능한 존재형태(이온교환, 탄산염, 산화물 형태)가 벤토나이트에 의해 각각 8.5%, 5.6%, 19.2% 및 28.2% 감소하였다. 또한, 안정화제 의한 오염퇴적물의 용출저감 평가를 위해 TCLP(Toxicity Characteristic Leaching Procedure)를 수행한 결과, 미처리 오염퇴적물과 비교하여 안정화 처리 퇴적물인 경우 중금속의 용출량이 각각 Ni 95.7%, Cu 96.8%, Pb 99.2%, Zn 85.9%씩 크게 감소하는 것을 확인하였다. 이러한 결과로부터, 벤토나이트를 해양오염퇴적물의 피복소재로 사용할 경우 시험 대상 중금속의 안정화 효과가 확인되었다.
Abstract
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.
참고문헌 (29)
- Ahmaruzzaman, M., "Industrial wasts as low-cost potential adsorbents for the treatment of wastewater laden with heavy metals", Adv. Colloid Interface Sci., 166, pp.36~59 (2011)
- Bacon, J. R., "Is there a future for sequential chemical extraction?", Analyst, 133, pp.25~46 (2008)
- Batjaral, T., "Assessment of metals contamination of soils in Ulaanbaatar, Mongolia", J. Hazard. Mater, 184, pp.872~876 (2010)
- Benefield, L. D., "Chemical precipitation, Water Quality and Treatment" (1990), McGraw-Hill Inc.
- Bruell, R., "Evaluation of remedial alternatives of lead from shooting range soil", Environ. Engin. Sci., 16, pp.403~414 (1999)
- Chen, G. Z., "Cathodic refining in molten salts: Removal of oxygen, sulfur and selenium from static and flowing molten copper", J. Appl. Electrochem., 31, pp.155~164 (2001)
- Garcia, D., "Modeling of Pb(II) absorption by activated carbon", 석사, Dept of Civ. and Environ. Eng.,, pp.1995
- Goh, E. O., "Adsorption characteristics of copper ion onto a bentonite", J. Kor. Soc. Environ. Eng., 22, pp.83~89 (2000)
- Goudie, "Geomophological techniques" (1981), Allen and Unwin
- Grim, R. E., "Clay mineralogy", pp.79~195 (1976), Mcgraw-Hill Book Company
- Hatje, V., "Kinetics of trace element uptake and release by particles in estuarine waters: effects of pH, salinity, and particle loading", Environ. Inter., 29, pp.619~629 (2003)
- Jaynes, W. F., "Clay mineral type and organic compound sorption by hexadecyltrimethylammonium-exchanged clays", Soil. Sci. Soc. Am. J., 55, pp.43~48 (1991)
- 강한, "제올라이트와 벤토나이트를 이용한 중금속 흡착 특성", 한국광물학회지, 21(1), pp.45~56 (2008), 한국광물학회
- Katsioti, M., "The effect of bentonite", cement mortar for the stabilization, Cem. Concr. Composites, pp.2008, 30[DOI]
- 김정대, "토양세척공정에서 광미오염토양 입자크기에 따른 중금속 추출특성", 공업화학, 19(1), pp.98~104 (2008), 한국공업화학회
- "Korea Mineral Resources Information Service" (2014)[URL]
- Kumpiene, J., "Stabilization of As, Cr, Cu, Pb and Zn in soil using amendments – A review", Waste Manage., 28, pp.215~225 (2008)
- Levy, D. B., "Distribution and partitioning of trace metals in contaminated soils near leadville, Colorado", J. Environ. Qual., 21, pp.185~195 (1992)
- Misak, N. Z., "Adsorption of Co2+ and Zn2+ ions on hydrous Fe(III), Sn(IV), and Fe(III)", Sn(IV) oxides, 1996, pp.184, 31~43
- 박길옥, "석회 처리에 의한 오염 퇴적물 내 중금속의 형태 변화 및 용출 가능성", 생태와 환경, 41(2), pp.166~173 (2008), 한국하천호수학회
- Management of hazardous chemicals in port and harbor sediment, "Port and Airport Research Institute", Technical note of the Port and Airport Research Institute, ~, pp.No.1219 (2010)
- Qian, G., "In-situ stabilization of Pb, Zn, Cu, Cd and Ni in the multi-contaminated sediments with ferrihydrite and apatite composite additives", J. Hazard. Mater., 170, pp.1093~1100 (2009)
- 신우석, "벤토나이트에 의한 혼합 중금속(Zn2+, Ni2+, Cd2+, Cu2+ 및 Pb2+) 수용액상에서의 중금속 흡착 특성", 유기물자원화, 22(2), pp.17~26 (2014), 유기성자원학회
- Spuller, C., "Trace metal stabilisation in a shooting range soil: Mobility and phytotoxicity", J. Hazard. Mater., 141, pp.378~387 (2007)
- Tessier, A., "Sequential extraction procedure for the speciation of particulate trace metals", Anal. Chem., 51, pp.844~851 (1979)
- U.S. Environmental Protection Agency, "Toxicity characteristic leaching procedure (method 1311) in SW-846", Office of Solid Waste, ~ (1992)
- "Contaminated sediment remediation guidance for hazardous waste sites" (2005)[URL]
- Weng, C. H., "Treatment of metal industrial waste water by fly ash and cement fixation", J. Environ. Eng., 120, pp.1470~1487 (1994)
- Zhirong, L., "FT-IR and XRD analysis of natural Na-bentonite and Cu(II)-loaded Na-bentonite", Spectrochim. Acta, Part A, 79, pp.11013~11016 (2011)