| 杨培峰,李卫平,于玲红,陈阿辉,杨文焕,韩佩江,任娟慧,焦丽燕.克鲁伦河滨岸带土壤重金属污染风险评估[J].农业环境科学学报,2015,34(11):2126-2132. |
| 克鲁伦河滨岸带土壤重金属污染风险评估 |
| Ecological Risk Assessment of Soil Heavy Metals in Riparian Zone of Kerulen River |
| 投稿时间：2015-05-06 |
| DOI：10.11654/jaes.2015.11.013 |
| 中文关键词: 重金属 滨岸带 克鲁伦河 风险评估 地积累指数法 潜在生态危害指数法 |
| 英文关键词: heavy metal riparian zone Kerulen River risk assessment index of geoaccumulation potential ecological risk index |
| 基金项目:国家自然科学基金(41263010);2015内蒙古科技计划项目 |
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| 中文摘要: |
| 为揭示克鲁伦河滨岸带重金属(As、Cd、Cr、Cu、Ni、Pb和Zn)污染生态风险状况,沿河采集10个采样点的土壤样品,采用地积累指数法和潜在生态危害指数法对克鲁伦河重金属的污染进行生态风险评估.结果表明:7种重金属As、Cd、Cr、Cu、Ni、Pb和Zn含量平均值分别为其背景值的117.71、266.7、0.64、2.07、2.12、5.38、55.95倍,大小排序为Cd> As> Zn>Pb> Ni> Cu> Cr,其中As、Cd和Zn三种重金属元素在土壤中积累情况较为严重.地积累指数法得出7种重金属污染程度排序为Cd> As> Zn>Pb> Cu> Ni> Cr,潜在生态风险指数表明污染程度由强到弱排序为Cd >As> Zn> Pb >Ni> Cu> Cr,由于毒性系数的影响,导致两种方法中Ni和Cu的污染程度大小顺序发生变化.结合综合污染系数及潜在生态风险系数的分析得知,10个采样点均处于极高污染风险等级,克尔伦苏木污染最为严重.由潜在生态风险贡献率得出Cd和As对土壤污染贡献率最高,初步判断Cd和As应该作为重金属污染治理和修复的优先控制对象. |
| 英文摘要: |
| The ecological risk of soil heavy metals(As、Cd、Cr、Cu、Ni、Pb and Zn) along the riparian zone of Kerulen River was assessed by using the index of geoaccumulation and the potential ecological risk index proposed by Hakanson. Results indicated that the average concentrations of seven heavy metals including As、Cd、Cr、Cu、Ni、Pb and Zn were 117.71、266.7、0.64、2.07、2.12、5.38 and 55.95 times of the background values, with an order of Cd >As >Zn >Pb >Ni >Cu >Cr, indicating high accumulation of As, Cd, and Zn in the soils. The index of geoaccumulation was Cd >As> Zn> Pb> Cu> Ni> Cr, and the potential ecological risk index was Cd >As >Zn >Pb >Ni >Cu >Cr. The combination of the comprehensive pollution coefficient and the potential ecological risk coefficient showed that the studies area was at a higher pollution risk level, with the most pollution at Keerlun Su. Both As and Cd were the priority pollutants in the studies area. |
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