| 武汉市东西湖区主要湖泊表层沉积物重金属污染特征与生态风险评价 |
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| 引用本文： | 龚杰,孙紫童,冯璐,胡胜华,敖鸿毅,吴辰熙.武汉市东西湖区主要湖泊表层沉积物重金属污染特征与生态风险评价[J].地质科技通报,2021,40(3):204-210. |
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| 作者姓名： | 龚杰 孙紫童 冯璐 胡胜华 敖鸿毅 吴辰熙 |
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| 基金项目： | 淡水生态与生物技术国家主要实验室基金2019FBZ03 |
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| 摘 要： | 人类活动对水环境影响巨大，同时水环境影响着人类的生产生活。采用地质累积指数法及潜在生态危害指数法对武汉市东西湖区主要湖泊表层沉积物重金属情况展开评价发现东西湖主要湖泊表层沉积物平均污染程度处于相对较低水平。地累积指数法评价结果表明，东大湖和金湖中Cd元素处于中度污染水平累积，墨水湖和上金湖中Cd元素为偏中度污染累积水平，其他湖泊沉积物中重金属均处于轻度或无污染水平。潜在生态危害指数法评价结果表明金湖和东大湖沉积物中重金属的潜在风险处于重度生态风险水平，墨水湖、上金湖、下银湖处于中度风险水平，其余湖泊沉积物中重金属的潜在风险均处于低风险水平。主成分分析表明，Hg、Cr、Ni、Cu、Zn、Cd、Pb可能来自于工业和交通源的排放，而As可能与农药的使用有关。后期金湖、东大湖、墨水湖、上金湖和下银湖的内源污染治理过程中需考虑重金属的生态风险问题。
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| 关 键 词： | 重金属 城市湖泊 生态风险 污染治理 |
| 收稿时间： | 2020-11-20 |
Pollution characteristics and ecological risk assessment of heavy metals in surface sediments of main lakes in Dongxihu district,Wuhan |
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| Abstract: | In this work, heavy metals in surface sediments of main lakes in Dongxihu district of Wuhan City were investigated. The results showed that the average concentrations of Zn, Cr, Ni, Cu, Pb, As, Cd and Hg were 108, 103, 45.3, 39.5, 32.3, 15.1, 0.34 and 0.08 mg / kg, respectively. Among them, the pollution level of Jinhu Lake is the most serious. Compared with other lakes in China, the average pollution level of surface sediments in the main lakes of Dongxihu is relatively low. The results of geoaccumulation index method showed that Cd in Dongdahu Lake and Jinhu Lake was in moderate pollution level, while that in Ink Lake and Shangjin Lake was moderate pollution accumulation level. Heavy metals in sediments of other lakes were in light or no pollution level. The potential ecological risk index method showed that the potential risk of heavy metals in the sediments of Jinhu Lake and Dongdahu Lake was at the high ecological risk level, the Ink Lake, Shangjin Lake and Xiayin Lake were at the moderate risk level, and the potential risks of heavy metals in the sediments of other lakes were at the low risk level. Principal component analysis showed that Hg, Cr, Ni, Cu, Zn, CD and Pb might come from industrial and traffic sources, while as might be related to pesticide use.The ecological risk of heavy metals should be considered in the process of endogenous pollution control of Jinhu, Dongdahu, Yinhu, Shangjin and Xiayinhu Lakes. |
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