| .夹皮沟金矿开采区土壤重金属污染潜在生态风险评价[J].农业环境科学学报,2013,32(3):. |
| 夹皮沟金矿开采区土壤重金属污染潜在生态风险评价 |
| Assessment of Potential Ecological Risk of Heavy Metals in Soils from Jia-Pi-Gou Gold Mine Area, China |
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| DOI：10.11654/jaes.2013.03.027 |
| 中文关键词: 金矿区 土壤 重金属污染 潜在生态风险评价 |
| 英文关键词: gold mine area soil heavy metal pollution assessment of potential risk |
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| 中文摘要: |
| 以松花江上游夹皮沟金矿开采区为研究对象，采用Hakanson潜在生态风险指数法（The Potential Ecological Risk Index）对金矿开采区土壤中Hg、Cu、Zn、Pb、Cd、Cr、Ni等7种重金属元素进行单因子和复合生态风险评价。结果表明，研究区域内的土壤重金属含量明显高于当地土壤背景值，其中28个采样点的Hg平均潜在生态危害系数为464.6，达到极度生态危害程度，Cd平均潜在生态危害系数为140.8，达强度生态危害程度，其余元素均未达到轻度生态危害的上限标准，7种重金属平均潜在生态危害系数依次为Hg>Cd>Pb>Cu>Ni>Cr>Zn。同时，28个采样点平均潜在生态风险指数为637.6，属于很强生态危害，为最高级别，其中，7个采样点的潜在生态风险指数大于600，属于很强生态危害，8个采样点的潜在生态风险指数介于300和600之间，属于强度生态危害，其余为中度和轻度生态危害级别。在7种重金属元素中，Hg元素对区域生态风险的贡献率最高，是构成潜在生态风险的最主要因子。这与金矿开采以及长达190年的混汞提金工艺所带来的环境污染有关。 |
| 英文摘要: |
| The ecological risks of seven different soil heavy metals, including Hg, Cu, Zn, Pb, Cd, Cr and Ni, in the Jia-pi-gou gold mine area, which located in the upstream area of Songhua River were discussed using single and compound factor potential ecological risk index. The results showed that the concentration of soils were higher than the local reference values and the soils had serious ecological risks of Hg and Cd with the single ecological risk index of seven elements in sample points of gold mine area, the risk index being 464.6 and 140.8, respectively, and slight risks of Cu, Zn, Pb, Cr and Ni with the index were less than Hg and Cd. The risk order of heavy metals was Hg>Cd>Pb>Cu>Ni>Cr>Zn. Meanwhile, the average ecological risk index of soil heavy metals of the twenty-eight sample points was 637.6. Seven of them were more than 600, which indicated that the soil ecological risk of the area was serious, and eight of them were between 300 and 600, which indicated that the soil ecological risk of the area was less serious and other points were moderate or slight serious. Among seven metals, Hg contributed most to the regional ecological risk, and was the main risk factor of the ecological risk in the gold mine area. This phenomenon was related to the environment pollution owing to use of amalgamation process to extract gold for more than 190 years. |
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