摘要
选取蒲河支流小南河中游段为研究对象,采集6个监测点位的河流水、河底泥、河岸土壤、周边植被作为样本,利用ICP-OES对重金属的含量进行检测。实验结果表明,小南河水样中主要重金属为Cd,Cr,Cu,Ni,Pb,Zn,其中,Cr,Zn含量大,并且Cr含量超出国家地表水质量三级标准限值,其污染最为严重;采用潜在生态风险指数法分析,Cd危害系数极强,上覆水、河岸土危害严重,含量大的Cr,Zn在水中迁移特性不同,使河岸土中Cr含量多,河底泥中Zn含量多;周边植被对Cd的吸收和传递能力最小,Ni最大。通过各种重金属含量及利用生态危害指数判断污染可能来源,为从源头上解决污染、保护蒲河流域生态环境提供了依据。
The middle reaches of Xiaonan River,a tributary of Puhe River,was selected as the research object,the river water,river bottom mud,riverbank soil and surrounding vegetation at six monitoring points was collected as samples,and the content of heavy metals was detected by ICP-OES.The experimental results showed that:the main heavy metals in the Xiaona River are Cd,Cr,Cu,Ni,Pb and Zn,and the content of Cr and Zn is high,the content of Cr exceeds the third-level standard limit,and the pollution is most serious.Using the potential ecological risk index method to analyze,the damage coefficient of Cd was very strong,and overlying water and the riparian soil were seriously harmed.The migration characteristics of Cr and Zn with larger contents were different in the water,the content of Cr in the riparian soil was high,and the content of Zn in the river bottom mud was high.The absorption and transfer capacity of surrounding plants to Cd is the least,while that of Ni is the largest.The possible sources of pollution are analyzed by judging the contents of each heavy metal and using ecological risk index,so as to provide a basis for solving pollution from the source and protecting the ecological environment of the Puhe River Basin.
出处
《环境保护与循环经济》
2021年第11期49-53,57,共6页
environmental protection and circular economy
基金
沈阳航空航天大学大学生创新创业项目(X202010143347)。
关键词
水体
沉积物
重金属
污染特征
小南河
water body
sediment
heavy metals
pollution characteristics
Xiaonan River
