Volatile organic compounds (VOCs) are involved in the formation of ozone formation, which plays a significant role in regional air contamination and poses a great threat to human health. The VOCs were collected from the urban area of Hefei city via an off-line sampling method (SUMMA canister) and determined by gas chromatography-mass spectrometer. The average concentrations of VOCs were 17.65 ± 28.36 ppbv, which were mainly contributed by aromatics (10.02 ± 13.37 ppbv), haloalkane (5.37 ± 8.90 ppbv), ally halide (1.25 ± 3.36 ppbv), and aryl halid (1.02 ± 2.73 ppbv). According to the principal component analysis, three major sources were identified, including solvent use, vehicle exhaust, and industrial release, accounting for 70.6% of the total variance of the data. Health risk assessment was utilized to evaluate the potential adverse health effects of the individual VOC. The total hazard ratio in the selected area was higher than 1, where could pose health threat to exposed population. The cancer risk for benzene, carbon tetrachloride, trichloromethane, and 1, 2-dichloroethane were 4.8 × 10-5, 4.5 × 10-5, 3.3 × 10-5, and 2.5 × 10-5, respectively, indicating definite health risks.

中文翻译：

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合肥市挥发性有机物的分布，来源和健康风险评估。

挥发性有机化合物（VOC）参与臭氧层的形成，这在区域空气污染中起着重要作用，对人类健康构成了巨大威胁。通过离线采样方法（SUMMA罐）从合肥市市区收集挥发性有机化合物，并用气相色谱-质谱仪测定。VOC的平均浓度为17.65±28.36 ppbv，主要由芳族化合物（10.02±13.37 ppbv），卤代烷烃（5.37±8.90 ppbv），烯丙基卤（1.25±3.36 ppbv）和芳基卤化物（1.02±2.73 ppbv）贡献。根据主成分分析，确定了三个主要来源，包括溶剂使用，汽车尾气和工业释放，占数据总方差的70.6％。健康风险评估用于评估单个VOC的潜在不良健康影响。所选区域的总危险比高于1，可能对裸露的人群造成健康威胁。苯，四氯化碳，三氯甲烷和1，2-二氯乙烷的致癌风险分别为4.8×10-5、4.5×10-5、3.3×10-5和2.5×10-5，表明存在一定的健康风险。