生态环境学报Issue(9)：1438-1444,7.
郑州市环境空气中VOCs的污染特征及健康风险评价
Pollution condition and health risk assessment of VOCs in ambient air in Zhengzhou
摘要
Abstract
Volatile organic compounds (VOCs) could cause not only environmental problems such as haze and photochemical smog, but also some threats to human health in a certain concentration. To study the VOCs concentration and the risk of health effects from VOCs , the temporal and spatial distribution of VOCs were determined by GC/MS with Canister sampling during the period of 2012─2013 in Zhengzhou.The four-step evaluation model of health risk assessment (HRA) which was recognized internationally was adopted to preliminarily assess the health risks caused by VOCs. The results showed that alkanes and aromatic hydrocarbons were the main compositions of VOCs in ambient air in Zhengzhou and the proportion were 23.8% and 19.5%respectively. The annual average concentration of aromatic hydrocarbons was 131 μg·m-3, the annual average concentration of alkanes was 118 μg·m-3, and the annual average concentration of ketones was 84.3 μg·m-3. The highest annual concentration compounds were acetone (66.2μg·m-3), alcohol (27.5μg·m-3), undecane (24.4μg·m-3) and toluene (17.2μg·m-3). The pollution was middle level in China. The concentration of VOCs in summer was higher than in winter. But the difference of the concentrations of various types of compounds between two seasons was large. The highest daily concentrations of alkanes and aromatic hydrocarbons appeared at am 10:00 which was correlated with traffic flow. The results of HRA indicated that non-carcinogenic risk indexes of VOCs were higher than 1. Volatile pollutants would cause non-carcinogenic health hazard to exposed population.The cancer risk index exposed to benzene, carbon tetrachloride, 1,2-dichloroethane, 1,1,2-trichloroethane and hexachlorobutadiene was higher than the suggested value of USEPA which was not higher than OSHA. It indicated that the exposure might cause potential harm to human health.关键词
挥发性有机物/污染特征/健康风险评价Key words
volatile organic compounds/pollution characteristic/health risk assessment分类
资源环境引用本文复制引用
南淑清,张霖琳,张丹,梁晶,多可辛,张军,王玲玲..郑州市环境空气中VOCs的污染特征及健康风险评价[J].生态环境学报,2014,(9):1438-1444,7.基金项目
河南省科技厅重点科技攻关项目 （）
