Climate change impacts on polychlorinated biphenyls (PCBs) deposition in a shallow lake, China

3rd International Conference on Energy Engineering and Environmental Protection

能源学;生态环境科学

Zhang, Hanxiao^1 ; Huo, Shouliang^1

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing

100012, China^1

关键词: Anthropogenic activity;    Climate change impact;    Contribution values;    Environment management;    Gross domestic products;    Increasing temperatures;    Influential factors;    Polychlorinated biphenyl (PCBs);   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/227/5/052074/pdf
DOI  :  10.1088/1755-1315/227/5/052074

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The deposition of PCBs in lake sediments was affected by climate change and anthropogenic activities. To better understand the mechanism, GAMs models were performed to investigate the relationship between sedimentary PCBs and the two influential factors. The results showed the average contribution value of the sum of temperature and evaporation to PCBs (7.1%) was larger than that of the sum of aquatic TP and GDP (17.9%), indicating human activity is a major factor compared to climate change. The increasing total phosphorus and Gross Domestic Product in Lake Chaohu with the development of urbanization and industrialization promoted the deposition of PCBs in Lake Chaohu sediments before the consideration of environment management. The fitted relationship between sedimentary PCBs concentrations and Temperature was linear for Lake Chaohu, suggesting that increasing temperature enhanced the volatilization from primary and secondary sources and reduced the fugacity capacity of PCBs in water and sediments. The sedimentary PCBs concentrations increased with decreasing evaporation. In consequence, the interactive effect of climate change and anthropogenic activities must be addressed from a scientific perspective for future regulatory actions.