岷江干流重金属空间分布特征及污染评价

乔飞; 时瑶; 秦延文; 马迎群; 刘志超; 杨晨晨

doi:10.3969/j.issn.1674-991X.2018.06.080

岷江干流重金属空间分布特征及污染评价

doi: 10.3969/j.issn.1674-991X.2018.06.080

中国环境科学研究院流域水环境综合管理研究室,北京 100012

详细信息

作者简介:
作者简介:乔飞(1977—),男,副研究员,博士,主要从事流域水资源、水环境模拟研究, qiaofei@craes.org.cn

通讯作者:
秦延文 E-mail: qinyw@craes.org.cn

中图分类号: X522;
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出版历程
- 收稿日期: 2018-07-21
- 刊出日期: 2018-11-20

Spatial distribution and pollution assessment of heavy metals in Minjiang River mainstream

Water Environment Management and Research Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

More Information

Corresponding author: 秦延文 E-mail: qinyw@craes.org.cn

摘要

摘要: 为了解岷江干流重金属污染水平,对其上覆水、悬浮颗粒物(SS)和表层沉积物中重金属As、Cd、Cr、Cu、Pb、Zn浓度及其空间分布特征进行了研究,并分别采用综合污染指数评价法和地累积指数评价法对上覆水和表层沉积物重金属污染程度进行评价。结果表明:岷江干流上覆水中重金属浓度均低于GB 3838—2002《地表水环境质量标准》Ⅰ类水质标准;SS中6种重金属浓度均超过全国水系沉积物平均值,Cr、As和Pb浓度沿程变化较为相似,均在中下游出现最高值;表层沉积物中Cd和Pb浓度均超过全国水系沉积物平均值,Cr和Cu浓度沿程变化较为相似,均在下游宜宾段出现最高值;SS及表层沉积物中Cd富集浓度均为最高,其平均值分别为2.99、39.94 mg/kg,分别为全国水系沉积物平均值的23.00倍、307.23倍;综合污染指数评价结果表明,岷江干流上覆水无重金属污染,地累积指数评价结果表明,岷江干流表层沉积物主要以Cd污染为主。
- 岷江干流 /
- 重金属 /
- 空间分布 /
- 污染评价
Abstract: In order to explore the pollution level of heavy metals in Minjiang River mainstream, the contents and spatial distribution of As, Cd, Cr, Cu, Pb and Zn in surface water, suspended solids and surface sediments were analyzed. The integrated pollution index and geoaccumulation index were used to evaluate the contamination degree of heavy metals in surface water and surface sediments respectively. The results indicated that the contents of the heavy metals in surface water were below Grade I standard of Environmental Quality Standards for Surface Water (GB 3838-2002). The contents of the 6 heavy metals in suspended solids exceeded the average contents of the stream sediments in China. Similar patterns of spatial distribution in suspended solids were observed for As, Cr and Pb, with the highest contents both at the middle and lower reaches. The contents of Cd and Pb in surface sediments exceeded the average contents of the stream sediments in China. Similar patterns of spatial distribution in surface sediments were observed for Cr and Cu, with the highest contents at the downstream in Yibin section. The contents of Cd in suspended solids and surface sediments were the highest, being 2.99 mg/kg and 39.94 mg/kg respectively, which were 23.00 and 307.23 times the average contents of the stream sediments in China. The integrated pollution index assessment showed that the water quality of surface water was good in Minjiang River mainstream, and the geoaccumulation index assessment showed that Cd was the major pollution element in surface sediments.
- Minjiang River mainstream /
- heavy metals /
- spatial distribution /
- pollution assessment

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