第七届青年地学论坛

In order to investigate the health risks of typical benzene series and halocarbons (BSHs) near a chemical industry park, this study selected a crowded area near a large-scale chemical industry park as the research object. The samples of ambient air, indoor air and tap water in summer and winter were collected, and the concentration characteristics, sources and exposure risks of typical BSH species, including five benzene series (benzene, toluene, ethylbenzene, o-xylene, m,p-xylene) and five halocarbons (dichloromethane, trichloromethane, trichloroethylene, tetrachloromethane, and tetrachloroethylene), were analyzed. The total concentrations of BSHs were 53.32 μg m^-3, 36.29 μg m^-3, and 26.88 ng L^-1 in indoor air, ambient air, and tap water, respectively. Halocarbons dominated the total BSHs, and the concentration was relatively higher than many other industrial areas in the world. Industrial solvent use, industrial processes and vehicle exhaust emissions were the main sources of BSHs in the ambient air. The use of household products, such as detergents and pesticides, was the main source of indoor BSHs. Inhalation was the main exposure route for the people. Ingestion of drinking water was an important exposure route as well, but it had less impact compared to the inhalation. Both lifetime non-cancer risks of individual and cumulative BSHs were below the threshold (HQ=1), indicating that no obvious lifetime non-cancer risks existed in the study area. However, tetrachloromethane, benzene, trichloromethane, ethylbenzene, and trichloroethylene showed a potential lifetime cancer risk. In particular, the cumulative lifetime cancer risks exceeded the tolerable benchmark (1×10^-4), indicating that there existed lifetime cancer risk of BSHs to the people near the chemical industry park. This study can provide valuable information for the management of public health in chemical industrial parks.
 

Industry park; health risks; benzene series; halocarbons; exposure route