There has been a great negative impact on human life and economy with the outbreak of COVID-19,while the ecological environment has been improved.In order to explore the impact of COVID-19 control on heavy metal pollution and aquatic ecological in Tai Lake concretely,the difference of water quality and aquatic ecological risk of heavy metal between 2021.6-2021.7 and 2019.9-2020.1 were compared and analyzed.PCA-APCS-MLR model was further used to analyze the quantitative source of heavy metals.It clearly showed that the pollution and the ecological risks to aquatic organisms of heavy metals in Tai Lake were significantly reduced by 39.9％-92.8％and 0.19％-87.66％during the epidemic period,respectively.The proportion of excellent water quality increased by 33.65％.Copper and chromium were the most affected elements,and the contribution rates of industrial sources to copper and chromium were 79.75％and 84.26％,respectively,as the reduction of industrial activities was the main reason for the reduction of heavy metal pollution and ecological risk in Tai Lake.To better control heavy metal pollution and protect aquatic organisms,The discharge of copper and chromium from electroplating,smelting and chemical enterprises around Tai lake should be managed first.
关键词
太湖/内梅罗指数法/联合概率法/定量源解析/PCA-APCS-MLR模型
Key words
Tai Lake/Nemero index method/joint probability curve method/quantitative source analysis/PCA-APCS-MLR model
维普
万方数据