Distribution characteristics of heavy metal pollution in the middle reaches of Xiaonan River in Shenyang
Vol 3, Issue 2, 2022
VIEWS - 29 (Abstract)
Abstract
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.
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