黄河尾闾及近岸沉积物中重金属的含量分布及生态风险评价

发布时间：2018-05-16 13:15

本文选题：黄河尾闾及近岸 + 沉积物　；参考：《海洋科学》2016年01期

【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:CdAsPbZnCuCr,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。
[Abstract]:In order to understand the pollution characteristics of heavy metals in sediments from the end of the Yellow River and the coastal sediments, the contents of six heavy metals, such as Cr-CuCuZZn-Zn-CdPb and as, in 48 samples of the Yellow River and estuary were determined by inductively coupled plasma mass spectrometer (ICP-MS). The distribution and ecological risk were evaluated. The results show that the total contents of heavy metals in the end of the Yellow River and in the coastal area of the Yellow River show a tendency of increasing first and then decreasing and then increasing in the direction from the river channel to the estuary, and the contents of CD and Zn in the B section of the Yellow River increase obviously with a small increase in Cu and Cr contents. The concentration of heavy metals in the sediment of the Yellow River estuary is obviously higher than that in the river sediment. Compared with other basins in China, the content of heavy metals in the study area is at a lower level. The results of potential ecological risk assessment showed that the potential ecological risk coefficients of six heavy metals were: 1 / CdAsPbZnCuCr from high to low, and CD and as was the main cause of potential ecological risk in the end and inshore sediments of the Yellow River. Their contribution rates were 55.90% and 29.54 respectively. The ecological risk and pollution were low and light. The results will provide some basic data for ecological protection, environmental management and pollution control of the Yellow River.
【作者单位】：中国科学院烟台海岸带研究所;中国科学院大学;大连大学;许昌学院;
【基金】：中国科学院烟台海岸带研究所“一三五”规划项目(Y254021031)~~
【分类号】：X55;X826

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