| 中国主要湖泊表层沉积物重金属污染特征与评价分析 |
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| 引用本文： | 丁之勇,蒲佳,吉力力&#;阿不都外力.中国主要湖泊表层沉积物重金属污染特征与评价分析[J].环境工程,2017,35(6):136-141. |
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| 作者姓名： | 丁之勇 蒲佳 吉力力&#;阿不都外力 |
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| 作者单位： | 1. 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,乌鲁木齐830011;中国科学院大学,北京100049;中国科学院中亚生态与环境研究中心,乌鲁木齐830011;2. 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室,乌鲁木齐830011;中国科学院中亚生态与环境研究中心,乌鲁木齐830011 |
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| 基金项目： | 国家自然科学基金面上项目，国家自然科学基金 |
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| 摘 要： | 为了解我国主要湖泊沉积物中重金属的污染特征,通过搜集整理已公开发表的文献资料数据,分析了我国31个主要湖泊表层沉积物中As、Cd、Cr、Cu、Hg、Ni、Pb和Zn 8种重金属含量的平均值及其分布特征,并运用地累积指数法、潜在生态风险指数法对其污染程度进行评价。结果显示:我国31个湖泊的沉积物中As、Cd、Cr、Cu、Hg、Ni、Pb、Zn平均含量分别为16.39,0.497,6.29,36.89,0.076,35.37,99.52 mg/kg,大部分元素含量平均值的最大值分布区域较为分散。地累积指数评价结果表明:8种重金属的平均污染程度由高到低依次为Cd>Hg>Cu>Zn>As>Ni>Zn>Cr,Cd和Hg在多个湖泊沉积物中达中度到重污染。潜在生态风险指数评价结果表明:8种重金属的潜在生态风险系数从高到低依次为Cd>Hg>As>Cu>Pb>Ni>Cr>Zn。8种重金属的总地累积指数和综合潜在生态风险具有显著的地域差异(P0.05),表明我国主要湖泊具有各自不同的重金属污染特征。
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| 关 键 词： | 湖流沉积物 重金属污染 地累积指数 生态风险 |
HEAVY METAL CONTAMINATION CHARACTERISTICS AND ITS ASSESSMENT IN SURFACE SEDIMENTS OF MAJOR LAKES IN CHINA |
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| DING Zhi-yong,PU Jia,JILILI Abuduwaili.HEAVY METAL CONTAMINATION CHARACTERISTICS AND ITS ASSESSMENT IN SURFACE SEDIMENTS OF MAJOR LAKES IN CHINA[J].Environmental Engineering,2017,35(6):136-141. |
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| Authors: | DING Zhi-yong PU Jia JILILI Abuduwaili |
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| Abstract: | In order to understand the characteristics of heavy metal contamination in surface sediments of major lakes in China,the average concentration of 8 heavy metals including As、Cd、Cr、Cu、Hg、Ni、Pb and Zn in surface sediments from 31 major lakes in China were analyzed by the collected data of the published documents.And then,the geo-accumulation index (Igeo) and the potential ecological risk of each heavy metal was evaluated.The results showed that the average concentration of As 、Cd、Cr、Cu、Hg、Ni、Pb and Zn in surface sediments from those lakes was 16.39,0.497,6.29,36.89,0.076,35.37,99.52 mg/kg.The distribution of the maximum value of average concentration of most heavy metals were dispersion.The contamination extent of each heavy metal in sediments by geo-accumulation index followed the order:Cd ＞ Hg ＞ Cu ＞ Zn ＞ As ＞ Ni ＞ Zn ＞ Cr,and the contamination extend of Cd and Hg were at class 3 (moderately polluted) and 5 (heavily polluted) at many lakes.The potential ecological risk of 8 heavy metals in surface sediments by the potential ecological risk factors followed the order as Cd ＞ Hg ＞ As ＞ Cu ＞ Pb ＞ Ni ＞ Cr ＞ Zn.The total geo-accumulation index and total potential ecological risk of eastern and central region were different significantly from those lakes in western China (P ＜ 0.01),and the contamination extent of eastern and central regions lakes was more aggravate than western regions.But the contamination of single heavy metal in different region were not significant (P ＞ 0.05),indicating different characteristics of heavy metal contamination in China's major lakes. |
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| Keywords: | lakes sediment heavy metal contamination geo-accumulation index ecological risk |
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