| 韦绪好,孙庆业,程建华,窦智勇,王琛.焦岗湖流域农田土壤重金属污染及潜在生态风险评价[J].农业环境科学学报,2015,34(12):2304-2311. |
| 焦岗湖流域农田土壤重金属污染及潜在生态风险评价 |
| Pollution and Potential Ecological Risk Assessment of Heavy Metals in Farmland Soils in Jiaogang Lake Basin, China |
| 投稿时间：2015-07-14 |
| DOI：10.11654/jaes.2015.12.008 |
| 中文关键词: 农田土壤 重金属 地累积指数 潜在生态风险 焦岗湖流域 |
| 英文关键词: Tarmland soil heavy metal geo-accumulation index potential ecological risk Jiaogang Lake basin |
| 基金项目:国家科技重大专项(2012ZX07204-004) |
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| 中文摘要: |
| 以焦岗湖流域农田土壤为研究对象,分析流域内农田土壤中重金属As、Cd、Cr、Cu、Pb和Zn的含量及污染特征,并采用地累积指数法和潜在生态危害指数法评价了该区域农田土壤中重金属污染状况和潜在的生态风险。结果表明:研究区农田土壤中重金属As、Cd、Cr平均含量高于背景值,并表现出不同程度的积累,而Cu、Pb、Zn平均含量低于背景值;地累积指数评价结果表明该区域农田土壤重金属污染总体表现为无污染到中污染状态,主要污染物为Cd、As和Cr;潜在生态危害指数法评价结果表明研究区土壤潜在生态风险为中等,重金属的潜在生态危害依次为Cd >As >Cu> Pb >Cr >Zn;焦岗湖流域农田土壤重金属含量在空间分布上总体表现为流域西南部及东部区域较高、中部及北部区域较低。 |
| 英文摘要: |
| In this study, concentrations and pollution characteristics of As, Cd, Cr, Cu, Pb, and Zn in farmland soils from Jiangang Lake basin were investigated. The ecological risk of heavy metal pollution in the soils was assessed using the methods of geo-accumulation index and potential ecological risk index. Results indicated that the average concentrations of As, Cd, and Cr were higher than the local background values, showing their accumulation. However, the average concentrations of Cu, Pb, and Zn were still lower than the local background values. Geo-accumulation index showed that heavy metal pollution in these farmland soils studied was from no to moderate pollution, with Cd, As and Cr being major pollutants. The potential ecological risk of the studied farmland soils was at medium level, and the potential ecological hazard of heavy metals was in order of Cd >As >Cu >Pb >Cr >Zn. The concentrations of heavy metals were higher in soils from southwest and east areas than from central and north areas of Jiaogang Lake basin. |
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