| 摘要: |
| 为了解黄河尾闾及近岸沉积物中重金属的污染特征, 采用电感耦合等离子体质谱仪(ICP-MS)测定了黄河河道和河口48 个样品中Cr、Cu、Zn、Cd、Pb 和As 等6 种重金属的含量, 并对其分布和生态风险进行了评价。结果表明, 黄河尾闾及近岸重金属的总含量沿河道至河口方向呈现先增加后降低再增加的趋势, 至近岸B 断面, As、Pb、Cd 和Zn 含量呈明显增加趋势, Cu 和Cr 含量增加幅度较小; 黄河河口沉积物中重金属浓度明显高于河道沉积物中重金属的浓度。与我国其他流域相比, 研究区域重金属含量处于较低水平。潜在生态风险评价结果表明, 黄河尾闾及近岸沉积物6 种重金属潜在生态风险系数从高到低依次为: Cd>As>Pb>Zn>Cu>Cr, 黄河尾闾及近岸沉积物的潜在生态风险主要由Cd 和As 引起, 两者的贡献率分别为55.90%和29.54%, 研究区域生态风险低, 污染轻。研究结果将为黄河尾闾及近岸生态保护、环境管理和污染治理提供一定基础数据。 |
| 关键词: 黄河尾闾及近岸 沉积物 重金属 分布特征 生态风险评价 |
| DOI：10.11759/hykx20130827002 |
| 分类号: |
| 基金项目:中国科学院烟台海岸带研究所“一三五”规划项目(Y254021031) |
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| Concentration, distribution, and ecological risk assessment of heavy metals in sediments from the tail reaches of the Yellow River Estuary |
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ZHAO Ming-ming1,2, WANG Chuan-yuan1, SUN Zhi-gao1, SUN Wan-long1,2, LYU Ying-chun1, ZHAO Hao-Jie3, LU Yong4
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1.Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences;2.Universityof Chinese Academy of Sciences;3.Dalian University;4.Xuchang University
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| Abstract: |
| To understand the pollution characteristics of heavy metals in surface sediments from the tail reaches of the Yellow River Estuary, the concentrations of Cr, Cu, Zn, Cd, Pb, and As in 48 sediment samples were analyzed using inductively coupled plasma source mass spectrometry, and the potential ecological risks of each heavy metals were evaluated. The total content of metals from the tail reaches of the Yellow River Estuary showed a trend of decrease then a subsequent increase after the first increase, until section B of coastal, the contents of As, Pb, Cd and Zn increased obviously, and the contents of Cu and Cr increased by a lesser extent. The heavy metal concentrations in the sediments of the Huanghe Estuary were significantly higher than those within the Huanghe Channel; however, compared with other typical areas along the coast of China, the heavy metal concentrations are relatively low. In relation to potential ecological risk factors, it was determined that the potential ecological risk of six heavy metals in sediments were in the order of: Cd>As>Pb>Zn>Cu>Cr; Cd and As contributed the most to the total potential ecological risk accounting for 55.90% and 29.54%, respectively. All sampling sites posed low potential ecological risks for the sea reach of the Huanghe River. These results provide base data for studies in ecological protection, environment management, and pollution control within the tail reaches of the Yellow River Estuary. |
| Key words: tail reaches of the Yellow River Estuary sediment heavy metal distribution ecological risk |
