| 渭河陕西段表层沉积物重金属污染特征及潜在风险 |
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| 引用本文： | 杨学福,姚志鹏,王蕾,张宇,关建玲.渭河陕西段表层沉积物重金属污染特征及潜在风险[J].中国环境监测,2017,33(2):61-67. |
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| 作者姓名： | 杨学福 姚志鹏 王蕾 张宇 关建玲 |
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| 作者单位： | 西安工业大学建筑工程学院, 陕西 西安 710021;西安建筑科技大学环境与市政工程学院, 陕西 西安 710055,中国环境监测总站, 国家环境保护环境监测质量控制重点实验室, 北京 100012,陕西省环境监测中心站, 陕西 西安 710054,陕西省环境监测中心站, 陕西 西安 710054,陕西省环境监测中心站, 陕西 西安 710054 |
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| 基金项目： | 陕西省社会发展科技攻关项目（2015SF282） |
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| 摘 要： | 为了解渭河陕西段表层沉积物重金属的污染特征，采用ICP-MS分析了13个采样断面表层沉积物中As、Cd、Cr、Cu、Mn、Ni、Pb和Zn 8种重金属的含量，并对其来源和生态风险进行了评价。结果表明：渭河陕西段8种重金属的平均含量顺序依次为Mn > Zn > Cr > Cu > Ni > Pb > As > Cd；除Ni外的其余7种重金属的平均含量均超过陕西省A层土壤背景值。各断面表层沉积物重金属的潜在生态风险指数（RI）介于111.4~7 043.7，其中23.1%的断面有极强生态风险，46.2%的断面为中等生态风险，其余为轻微生态风险。Cd污染最为严重，对各断面的潜在生态风险介于较强生态风险与极强生态风险之间，对RI的贡献平均为85.2%；其余7种重金属在所有断面均属于轻微生态危害。渭河陕西段表层沉积物As、Cd、Cu和Zn主要为工业与农业来源；Cr和Ni主要为自然来源；Pb和Mn与城市污水和交通污染来源有关。
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| 关 键 词： | 渭河陕西段 表层沉积物 重金属 生态风险 |
| 收稿时间： | 2015/11/19 0:00:00 |
| 修稿时间： | 2016/2/16 0:00:00 |
Heavy Metal Pollution Characteristics and Potential Ecological Risk in Surface Sediment of Shaanxi Segment of the Weihe River |
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| YANG Xuefu,YAO Zhipeng,WANG Lei,ZHANG Yu and GUAN Jianling.Heavy Metal Pollution Characteristics and Potential Ecological Risk in Surface Sediment of Shaanxi Segment of the Weihe River[J].Environmental Monitoring in China,2017,33(2):61-67. |
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| Authors: | YANG Xuefu YAO Zhipeng WANG Lei ZHANG Yu and GUAN Jianling |
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| Institution: | School of Civil and Architecture Engineering, Xi''an Technological University, Xi''an 710021, China;School of Environmental and Municipal Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China,State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring, China National Environmental Monitoring Centre, Beijing 100012, China,Shaanxi Environmental Monitoring Centre, Xi''an 710054, China,Shaanxi Environmental Monitoring Centre, Xi''an 710054, China and Shaanxi Environmental Monitoring Centre, Xi''an 710054, China |
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| Abstract: | In order to understand the pollution characteristics of heavy metals in surface sediments of Shaanxi segment of the Weihe River, the concentrations of 8 heavy metals including As,Cd,Cr,Cu,Mn,Ni,Pb and Zn in surface sediments of 13 sampling section were analyzed by inductively coupled plasma mass spectrometry (ICP-MS) and their potential ecological risks were evaluated. The results indicated that the average concentration level of heavy metals in sediments followed the order:Mn > Zn > Cr > Cu > Ni > Pb > As > Cd. The concentrations of 8 heavy metals, except Ni, were above the corresponding soil background values for Shaanxi. The potential ecological risk indexes (RI) of 8 heavy metals at all sampling sites were between 111.4 and 7 043.7, including 23.1% sampling sites posed serious potential ecological risk, 46.2% sampling sites posed moderate potential ecological risk, and the rest sampling sites posed low potential ecological risk for the River. Cd, which potential ecological risk was from higher potential ecological risk to serious potential ecological risk and contributed 85.2% of the total potential ecological risk, was found as the most polluted heavy metal in the River. The rest of 7 heavy metals all posed a low potential ecological risk at all sampling sites of the River. Source analysis suggested that, As,Cd,Cu and Zn are derived from the industrial and agricultural sources, Cr and Ni are derived from the Natural sources, Pb and Mn are derived from urban sewage and vehicle pollution sources. |
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| Keywords: | Shaanxi segment of the Weihe River surface sediment heavy metals ecological risk |
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