Investigation and risk assessment modeling of As and other heavy metals contamination around five abandoned metal mines in Korea
Investigation and risk assessment modeling of As and other heavy metals contamination around five abandoned metal mines in Korea
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DOI：
10.1007/s10653-005-0127-2
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发表时间：
2005-04-01
影响因子：
4.2
通讯作者：
Lee, CH
中科院分区：
文献类型：
--
作者：
Kim, JY;Kim, KW;Lee, CH
尾矿、农业土壤、蔬菜和地下水样品是从韩国废弃金属矿（Duckum、Dongil、Dongjung、Myoungbong 和 Songchun 矿）采集的。通过分析砷 (As) 和重金属 (Cd、Cu、Pb 和 Zn) 的总浓度来调查污染水平。对尾矿进行了几种消化方法（毒性特征浸出程序（TCLP）、合成沉淀浸出程序（SPLP）、0.1 N/1 N HCl）和顺序萃取分析，以检查尾矿中砷和重金属的潜在浸出性。根据风险评估和修复目标，提出了研究矿山的紧急修复顺序。松春矿山尾矿受砷和重金属污染最为严重。尾矿中砷和铅的总浓度分别为 38,600-58,700 mg/kg（平均 47,400 mg/kg）和 11,800-16,800 mg/kg（平均 14,600 mg/kg）。所有矿山均发现农业土壤中砷浓度较高。所有矿区蔬菜中 Cd 的平均浓度均超过正常值，而 As 仅在 Dongjung、Myoungbong 和 Songchun 矿区超过正常值。 Dongil和Myoungbong矿各1个地下水样品以及Songchun矿4个地下水样品的As浓度均超过10μg/L。TCLP方法显示，Songchun尾矿中只有Pb（6.49mg/L）超出了监管水平（5mg/L）。采用1N HCl消解法，松春尾矿中砷浓度为4250毫克/千克，比韩国对策标准高出3000倍。尾矿中砷的连续提取结果表明，Myoungbong 和 Songchun 矿山尾矿中的易释放部分超过 30%，残留部分小于 40%。根据使用 As、Cd 和 Zn 的危害商和癌症风险显示的暴露健康风险结果，Dongil 矿山需要采取最紧迫的补救行动。土壤和地下水中砷的浓度折减系数（CRF）顺序为：松春>东中>东一>明峰>德金矿。
Tailings, agricultural soils, vegetables and groundwater samples were collected from abandoned metal mines (Duckum, Dongil, Dongjung, Myoungbong and Songchun mines) in Korea. Total concentrations of arsenic (As) and heavy metals (Cd, Cu, Pb and Zn) were analyzed to investigate the contamination level. Several digestion methods (Toxicity characteristics leaching procedure (TCLP), synthetic precipitation leaching procedure (SPLP), 0.1 N/1 N HCl) and sequential extraction analysis for mine tailings were conducted to examine the potential leachability of As and heavy metals from the tailings. The order of urgent remediation for the studied mines based on the risk assessment and remedial goals was suggested.The Songchun mine tailings were most severely contaminated by As and heavy metals. Total concentrations of As and Pb in the tailings were 38,600-58,700 mg/kg (av. 47,400 mg/kg) and 11,800-16,800 mg/kg (av. 14,600 mg/kg), respectively. Agricultural soils having high As concentrations were found at the all mines. Average concentrations of Cd in the vegetables exceeded the normal value at all mines areas, while As only at the Dongjung, Myoungbong, and Songchun mine area. One groundwater sample each from the Dongil and Myoungbong mines, and 4 groundwater samples from the Songchun mine had values above 10 mu g/L of As concentration.The TCLP method revealed that only Pb in the Songchun tailings, 6.49 mg/L, exceeded the regulatory level (5 mg/L). Employing the 1-N HCl digestion method, the concentration of As in the Songchun mine tailings, 4,250 mg/kg, was up to 3,000 times higher than its Korean countermeasure standard. Results from the sequential extraction of As in the tailings showed that the easily releasable fraction in the Myoungbong and Songchun mine tailings was more than 30% and the residual fraction was less than 40%.Based on results showing the exposure health risk employing the hazard quotient and cancer risk of As, Cd and Zn, the Dongil mine needs the most urgent remedial action. The concentration reduction factor (CRF) of As in both soil and groundwater follows the order: Songchun > Dongjung > Dongil > Myoungbong > Duckum mine.