废弃矿山重金属、砷、锑的地球化学污染评价及分布特征调查

IF 0.4 Q4 GEOLOGY

Economic and Environmental Geology Pub Date : 2022-12-31 DOI:10.9719/eeg.2022.55.6.717

Han-Gyum Kim, B. J. Kim, Myoung-Soo Ko

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引用次数: 0

摘要

本研究旨在评估废弃金矿土壤和水中As、Cd、Cu、Pb、Sb和Zn的地球化学污染程度。采用富集因子（EF）、地质累积指数（Igeo）和污染负荷指数（PLI）评价土壤样品的地球化学污染程度。测定了水样中硫酸盐和重金属浓度的变化，以确定与尾矿坝距离有关的地球化学分布。地球化学污染指数表明，尾矿坝附近土壤样品中As、Cd、Pb和Zn的污染程度较高，而Sb的污染程度相近。这些结果表明，As、Cd、Pb和Zn的扩散是通过采矿活动等人为来源发生的。就水样而言，在特定区域测定了As、Cd、Zn和SO42-的浓度异常，此外，元素浓度随着距离的增加而逐渐降低。这一结果表明，重金属在水中的分布是由尾矿和土壤中硫化物矿物的风化作用引起的。研究区过去曾进行过污染土壤的修复，但重金属的地球化学扩散被认为是由潜在的污染源引起的。因此，在修复完成后，有必要对土壤和水进行持续监测。

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Geochemical Contamination Assessment and Distribution Property Investigation of Heavy Metals, Arsenic, and Antimony Vicinity of Abandoned Mine

This study was conducted to assess the geochemical contamination degree of As, Cd, Cu, Pb, Sb, and Zn in the soil and water samples from an abandoned gold mine. Enrichment Factor (EF), Geoaccumulation Index (Igeo), and Pollution Load Index (PLI) were carried out to assess the geochemical contamination degree of the soil samples. Variations of sulfate and heavy metals concentration in water samples were determined to identify the geochemical distribution with respect to the distance from the mine tailing dam. Geochemical pollution indices indicated significant contaminated with As, Cd, Pb, and Zn in the soil samples that areas close to the mine tailing dam, while, Sb showed similar indices in all soil samples. These results indicated that the As, Cd, Pb, and Zn dispersion has occurred via anthropogenic sources, such as mining activities. In terms of water samples, anomalies in the concentrations of As, Cd, Zn, and SO 42- was determined at specific area, in addition, the concentrations of the elements gradually decreased with distance. This result implies the heavy metals distribution in water has carried out by the weathering of sulfide minerals in the mine tailing and soil. The study area has been conducted the remediation of contaminated soil in the past, however, the geochemical dispersion of heavy metals was supposed to be occurred from the potential contamination source. Therefore, continuous monitoring of the soil and water is necessary after the completion of remediation.

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来源期刊

Economic and Environmental Geology GEOLOGY-

CiteScore

0.70

自引率

33.30%

发文量

期刊介绍： The Economic and Environmental Geology (Econ. Environ. Geol.) is the official journal of the Korean Society of Economic and Environmental Geology. The prime focus of the journal will remain on high-impact original research and reviews in the fields of ore deposits, economic and environmental geology of the solid Earth at all scales. To better represent the changes we face today, Econ. Environ. Geol. particularly encourages submission of papers based on the integration of a multitude of geophysical, geological, geochemical, hydrogeological, mineralogical, and applied geological approaches. Within this space, we are particularly keen to advance roles of Econ. Environ. Geol. in delivering scientific solutions to the pressing issues of our time, namely in reducing our vulnerability to the ''solid-earth'' natural hazards and in resource development applications. With growing demand for access to Earth''s resources and urgent needs to seek new solutions for dealing with harmful waste, we have enormous benefits to be gained from better a understanding of the physics of this extraordinary dynamic planet.