贵州典型城市河流表层沉积物汞生态风险研究

王青峰; 樊磊磊; 王丹; 彭惠惠; 李仲根

doi:10.13205/j.hjgc.202008041

贵州典型城市河流表层沉积物汞生态风险研究

doi: 10.13205/j.hjgc.202008041

王青峰^1,2, ,,
樊磊磊¹,
王丹¹,
彭惠惠¹,
李仲根^1,2

1. 遵义师范学院资源与环境学院, 贵州遵义 563008;
2. 中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550002

基金项目:

贵州省科技厅基础研究计划项目（[2017]1200）；贵州省教育厅青年科技人才成长项目（黔教合KY字[2016]252）；贵州省教育厅贵州省黔北土壤资源与环境特色重点实验室项目（黔教合KY字[2017]010）。

详细信息

作者简介:
王青峰(1988-),男,博士,主要研究方向为重金属污染控制。457892463@qq.com

通讯作者:
王青峰(1988-),男,博士,主要研究方向为重金属污染控制。457892463@qq.com

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出版历程
- 收稿日期: 2019-06-23

ECOLOGICAL RISK OF MERCURY IN SURFACE SEDIMENTS OF TYPICAL URBAN STREAM IN GUIZHOU PROVINCE

1. Department of Resources and Environment, Zunyi Normal University, Zunyi 563008, China;
2. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

摘要

摘要: 遵义湘江河是流经遵义市主城区的典型城市河流，为评价遵义湘江河的汞污染状况，系统采集河流表层底泥并进行分析。结果表明：沉积物汞含量为0.131~3.132 mg/kg，平均汞含量为1.049 mg/kg，河水和沉积物汞含量上游低于下游，汞含量与流经市区距离呈显著正相关。沉积物的甲基汞含量为2.1~31.4 ng/g，占总汞的比例为1.11%~1.87%，略高于其他地区。汞的BCR形态分析表明，沉积物中的汞主要以残渣态为主。生态风险分析表明，湘江河属于轻度污染但存在较大的潜在生态风险。
- 遵义湘江河 /
- 沉积物 /
- 汞含量 /
- 污染评价
Abstract: Xiangjiang River is a typical urban stream flowing through the main urban area of Zunyi. To evaluate the pollution characteristics and ecological risk of mercury of Zunyi Xiangjiang River, the surface sediments system were collected and analyzed. The results showed that the mercury content of surface sediments was ranged in 0.131~3.132 ng/g and the mercury content in downstream of both river water and sediments was much higher than upstream, and was positively correlated with the distance passed though urban areas. The methyl mercury concentration of surface sediments was ranged in 2.1~31.4 ng/g and accounted for 1.11%~1.87% of the total mercury. Furthermore, the results of BCR three-step sequential extraction procedure showed that the mercury in the sediment was mainly in the form of residue. The risk assessment indicated that the Xiangjiang River was mildly polluted while it had considerable potential ecological risk.
- Xiangjiang River in Zunyi /
- sediments /
- mercury content /
- pollution assessment

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