| 摘要: |
| 运用Tessier 连续提取法, 对烟台海岸带3 个典型生态敏感区表层沉积物重金属Cr、Cu、Cd、Pb、Zn、Ni 的形态分布和污染状况进行了分析研究。结果表明, 研究区域中河口区与排污口区重金属Cr、Cu、Cd、Zn 和Ni 的含量较高, 尤其是Cd 污染严重。养殖区基本符合海洋沉积物质量第1 类标准;重金属Cr、Cu、Pb、Zn 和Ni 主要以残渣态为主, Cu 和Pb 的酸溶态所占比例较高, 而Cd 的可提取态比例较高, 在河口区与排污口区高达90%, 生物有效性最高。 |
| 关键词: 烟台海岸带 生态敏感区 沉积物 重金属 形态分布 |
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| 基金项目:国家自然科学基金项目(40906045); 烟台科技计划基金项目(2008155) |
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| Distribution of heavy metals speciation and pollution in surface sediment from typical ecologically regions of Yantai coastal zone |
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| Abstract: |
| The distribution of heavy metal (Cr, Cu, Cd, Pb, Zn and Ni) speciations in surface sediments from the typical ecologically sensitive regions of Yantai coastal zone were analyzed by the Tessier sequential extration method. The results showed that the concentrations of heavy metals (Cr, Cu, Zn and Ni), especially Cd, were quite high in the estuary region and sewage outlet region. The concentrations of heavy metals in the mariculture region were basically consistent with the first class standard of Marine Sediment Quality of China. The heavy metals of Cr, Cu, Pb, Zn and Ni in research regions were mainly existing in residual fraction. However, the extractable phase proportion of Cd in the estuary region and sewage outlet region were up to 90% and the bioavailability of Cd was highest among these heavy metals. |
| Key words: Yantai coastal zone ecologically sensitive regions surface sediment heavy metal speciation |
