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首页> 外文期刊>Geochemistry: Exploration, Environment, Analysis >Environmental contamination and bioaccessibility of arsenic and metals around the Dongjeong Au-Ag-Cu mine, Korea
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Environmental contamination and bioaccessibility of arsenic and metals around the Dongjeong Au-Ag-Cu mine, Korea

机译：韩国东正金银铜矿附近的环境污染以及砷和金属的生物可及性

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摘要

The objectives of this study were to investigate the level of arsenic and metal contamination of soils, crop plants and waters around the Dongjeong Au–Ag–Cu mine, and to assess bioaccessibility of metals in soil and plant using the EHS (extraction of heavy metals in stomach and small intestine) test. The EHS test was used to simulate the conditions in the human stomach and small intestine. In tailings, the mean concentrations of elements from the mine area were As 4070 mg kg–1, Cd 6 mg kg–1, Cu 380 mg kg–1, Mn 7760 mg kg–1, Pb 19 150 mg kg–1, Zn 2590 mg kg–1 and Hg 2.8 mg kg–1. Mountain soils adjacent to the tailings and waste rock piles were significantly contaminated by these elements. Farmland soils contained higher concentrations of As, Cd, Hg, Mn, Pb and Zn than soils at the control area, especially As and Pb which were over permissible levels. Metals were accumulated in crop plants grown on farmland soil near the mine area. The concentrations of metals were higher in leafy plants than in grain plants such as rice grain and red pepper. The concentrations of SO42–, Mn and Zn were elevated in stream water and were influenced by effluents from the tailings and waste rock piles. The concentrations of Cd and Pb in groundwater were higher than the permissible levels for drinking water in Korea. The results of the EHS test showed c. 60% of Cd, 10% of As and 30–40% of Cu, Pb, Mn and Zn were present as a bioaccessible fraction in farmland soils. In crop plants, high percentages of total concentrations of metals except Pb were extracted as bioaccessible concentrations. Bioaccessible concentrations of metals may be valuable for providing the input data for risk assessment at sites subject to anthropogenic soil contamination.
机译：这项研究的目的是调查东正金银银铜矿周围土壤，农作物和水体中的 砷和金属污染水平，并评估<使用EHS（胃和小肠中重金属的提取 ）测试土壤和植物中金属的生物可及性。 EHS 测试用于模拟人胃 和小肠中的状况。在尾矿中，矿区 元素的平均浓度为As 4070 mg kg –1 ，Cd 6 mg kg –1 ，Cu 380 mg kg –1 ，Mn 7760 mg kg –1 ， Pb 19150 mg kg –1 ，锌2590 mg kg –1 和汞2.8 mg kg –1 。尾矿和废物 堆附近的山地土壤被这些元素严重污染。 农田土壤中As，Cd，Hg， 的浓度较高。锰，铅和锌比对照地区的土壤要高，尤其是As 和Pb超过允许的水平。在矿区附近农田土壤上种植的农作物中积累了金属 。叶植物中金属的 浓度要高于稻米和红辣椒等谷物植物中的 浓度。水中的SO 4 2-，Mn和Zn的浓度 升高，并且 受到来自废水的影响尾矿和废石 桩。地下水中Cd和Pb的浓度 高于韩国允许的饮用水水平。 EHS测试的 结果显示c。农田土壤中有60％的Cd，10％的As和30-40％的Cu，Pb，Mn和Zn 存在。在农作物中，除铅以外的所有金属中高百分比的总 浓度被提取为生物可及的 浓度。金属的生物可及浓度可能是 有价值的，以便为受人为土壤污染的 场所的风险评估提供输入数据。

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