Analysis on Heavy Metal Distribution in Overlying Deposit and Pollution Characteristics in Drainage Basin of Xiaojiang River in Dongchuan District, China

World Multidisciplinary Earth Sciences Symposium 2017

Huang, Qianrui^1 ; Cheng, Xianfeng^1 ; Xu, Jun^1 ; Qi, Wufu^1 ; Yang, Shuran^1 ; Dong, Tao^2 ; Zhang, Xiangqun^1

Yunnan Land and Resources Vocational College, Kunming Yunnan

652501, China^1

Ministry of Land and Resources Kunming Mineral Resource Supervision Inspecting Center, Kunming Yunnan

650218, China^2

关键词: Distribution characteristics;    Effect of pH;    Heavy metal pollution;    Metal distributions;    Potential ecological risk;    River systems;    Secondary pollution;    Standard values;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/95/2/022052/pdf
DOI  :  10.1088/1755-1315/95/2/022052

来源: IOP

【 摘 要 】

The distribution characteristics of heavy metal (Cu, Zn, As, Pb and Cd) content in overlying deposit in Xiaojiang River is analyzed in this thesis, and potential ecological risk index is adopted to evaluate the potential ecological risk of heavy metal pollution in the overlying deposit. Results indicate that the heavy metal (Cu, Zn, As, Pb and Cd) content in overlying deposit in Xiaojiang River all has exceeded standard, especially the content near diggings which is much higher than the national first standard value. And this will affect the bottom mud and river system of Jinsha River to some extent. Cu and Cd are the key pollutants and should be taken as the key object of study. It can be seen from comparison between samples in wet season and that in dry season that pollutants in bottom mud will be released due to the effect of pH value, and secondary pollution of the river will be caused.