| 渤海西部表层沉积物中重金属的环境地球化学特征 |
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| 引用本文： | 蓝先洪,顾兆峰,密蓓蓓,秦亚超,黄龙,徐扬.渤海西部表层沉积物中重金属的环境地球化学特征[J].现代地质,2017,31(2):367. |
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| 作者姓名： | 蓝先洪 顾兆峰 密蓓蓓 秦亚超 黄龙 徐扬 |
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| 作者单位： | 1国土资源部海洋油气资源与环境地质重点实验室，青岛海洋地质研究所，山东 青岛266071； 2青岛海洋国家实验室海洋矿产资源评价与探测技术功能实验室，山东 青岛266071 |
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| 基金项目： | 国家自然科学基金项目（41330964，41406077);国土资源部海洋区域地质调查项目（1212011220113，GZH201400205，GZH201400201，GZH201500201，DD20160137） |
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| 摘 要： | 为探讨渤海西部在多重环境因素变化下沉积物中重金属的环境地球化学行为，分析了渤海西部44个站位表层沉积物样品中8种重金属元素含量，研究了重金属元素的分布特征、环境影响因素及其生态风险。结果表明，渤海西部表层沉积物中As、Cu、Cd、Cr、Hg、Ni、Pb、Zn的平均含量分别为117 mg/kg、255 mg/kg、014 mg/kg、689 mg/kg、0037 mg/kg、303 mg/kg、223 mg/kg、757 mg/kg；Cu、Cr、Ni、Zn含量与有机碳含量、小于63 μm细粒沉积物呈显著正相关，其在表层沉积物中的分布明显受到有机质含量和沉积物粒径的控制，而As、Hg分布没有明显受到有机质含量的影响。富集系数显示，Cr、Ni、Pb和Zn为无富集，Cu、As为轻度富集，Cd和Hg为中度富集。与多种背景值和一致性沉积物质量基准相比较，渤海西部表层沉积物Pb、Cd的含量超出背景值，而Cu、Zn、Ni、Cr、As、Hg含量也存在一定的异常，但其含量水平引发有害生物效应的可能性不大，尽管重金属元素含量偏高，但生态风险较小。
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| 关 键 词： | 表层沉积物 重金属 背景值 沉积物质量基准 渤海西部 |
Environmental Geochemical Characteristics of Heavy Metals in Surface Sediments from the Western Bohai Sea |
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| LAN Xianhong,GU Zhaofeng,MI Beibei,QIN Yachao,HUNAG Long,XU Yang.Environmental Geochemical Characteristics of Heavy Metals in Surface Sediments from the Western Bohai Sea[J].Geoscience——Journal of Graduate School,China University of Geosciences,2017,31(2):367. |
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| Authors: | LAN Xianhong GU Zhaofeng MI Beibei QIN Yachao HUNAG Long XU Yang |
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| Institution: | 1Key Laboratory of Marine Hydrocarbon Resource and Environmental Geology, Ministry of Land and Resources, Qingdao Institute of Marine Geology, Qingdao, Shandong266071, China; 2Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong266071, China |
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| Abstract: | The contents of As，Cu，Cd，Cr，Hg，Ni，Pb and Zn in surface sediments from 44 sampling sites in the western Bohai Sea were measured to investigate environmental geochemical characteristics of heavy metals related to multiple factors. The average concentrations of heavy metals of As，Cu，Cd，Cr，Hg，Ni，Pb and Zn were 117 mg/kg，255 mg/kg，014 mg/kg，689 mg/kg，0037 mg/kg，303 mg/kg，223 mg/kg and 757 mg/kg, respectively. The contents of heavy metals of Cu，Cr，Ni and Zn showed significantly positive correlation with the organic carbon content and the amount of fine grained sediments (<63 μm), and their distributions in surface sediments were controlled obviously by the content of organic matter and the grain size of sediments while the distributions of As and Hg was not significantly affected by organic matter content. Enrichment factors (EF) were calculated to weigh whether the observed concentrations were higher than background levels. Three groups of elements were sorted: (1) Cr，Ni，Pb and Zn were at background concentrations; (2) Cu and As were slightly enriched; and (3) Cd and Hg were moderately enriched. Compared with variety of background values and the internationally used consensus based sediment quality guidelines (CBSQGs) for salt water ecosystem，heavy metals in surface sediments from the western Bohai Sea implied a low probability of toxic effect，despite a sharp contamination trend pertaining to Cd and Pb. |
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| Keywords: | surface sediment heavy metal background value sediment quality guidelines (SQGs) western Bohai Sea |
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