Long-Term Halocarbon Observations in an Urban Area of the YRD Region, China: Characteristic, Sources Apportionment and Health Risk Assessment
Yuchun Jiang,
Anqi Zhang,
Qiaoli Zou,
Lu Zhang,
Hanfei Zuo,
Jinmei Ding,
Zhanshan Wang,
Zhigang Li,
Lingling Jin,
Da Xu,
Xin Sun,
Wenlong Zhao,
Bingye Xu,
Xiaoqian Li
Affiliations
Yuchun Jiang
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Anqi Zhang
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Qiaoli Zou
Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
Lu Zhang
Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
Hanfei Zuo
College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, China
Jinmei Ding
Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
Zhanshan Wang
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Zhigang Li
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Lingling Jin
Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
Da Xu
Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
Xin Sun
Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
Wenlong Zhao
Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
Bingye Xu
Zhejiang Ecological and Environmental Monitoring Center, Hangzhou 310012, China
Xiaoqian Li
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
To observe the long-term variations in halocarbons in the Yangtze River Delta (YRD) region, this study analyzes halocarbon concentrations and composition characteristics in Shanxi from 2018 to 2020, exploring their origins and the health effects. The total concentration of halocarbons has shown an overall increasing trend, which is driven by both regulated substances (CFC-11 and CFC-113) and unregulated substances, such as dichloromethane, chloromethane and chloroform. The results of the study also reveal that dichloromethane (1.194 ± 1.003 to 1.424 ± 1.004 ppbv) and chloromethane (0.205 ± 0.185 to 0.666 ± 0.323 ppbv) are the predominant halocarbons in Shanxi, influenced by local and northwestern emissions. Next, this study identifies that neighboring cities in Zhejiang Province and other YRD areas are potentially affected by backward trajectory models. Notably, chloroform and 1,2-dichloroethane have consistently surpassed acceptable thresholds, indicating a significant carcinogenic risk associated with solvent usage. This research sheds light on the evolution of halocarbons in the YRD region, offering valuable data for the control and reduction in halocarbon emissions.
