Monitoring,Analysis and Research on Heavy Metal Pollution in Water Bodies of a Certain River Basin
A river basin belongs to one of the key water systems of the the Pearl River basin,which is rich in a large number of mineral resources,which leads to the phenomenon that the heavy metals in the water body of the basin will exceed the standard.This article takes the upstream and downstream of the watershed as sampling points to monitor heavy metal pollution in the water body,analyze the basic water quality of the water body,and focus on the spatial and temporal distribution of heavy metals,as well as the water period variation characteristics of heavy metals.The results showed that there were significant seasonal fluctuations in water temperature,pH,conductivity,and dissolved oxygen,which were mainly related to precipitation,while dissolved oxygen varied with changes in water temperature.The spatial distribution of heavy metals shows zinc>copper>lead>cadmium,with consistent upstream and downstream distribution,while the concentrations of the four heavy metals vary with time and changes in water vapor.The concentration of heavy metals in this watershed has reached the Class II limit specified in GB 3838-2002 Environmental Quality Standards for Surface Water,which complies with the W orld Health Organization's Guidelines for Drinking Water Quality and can be used as a supplementary water source for drinking water in the region.
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