Volatile organic compounds in Shihezi, China, during the heating season: pollution characteristics, source apportionment, and health risk assessment
Volatile organic compounds in Shihezi, China, during the heating season: pollution characteristics, source apportionment, and health risk assessment
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DOI：
10.1007/s11356-020-08132-5
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发表时间：
2020-03-02
影响因子：
5.8
通讯作者：
Chen, Jiadeng
中科院分区：
文献类型：
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作者：
Ding, Yanzhou;Lu, Jianjiang;Chen, Jiadeng
2018年11月至2019年3月，利用气相色谱-质谱联用技术对石河子市57种挥发性有机物（VOCs）的混合比进行了测定。结果表明，挥发性有机物的平均混合比为58.48 ppbv，其中烷烃的贡献最大（34.15 ppbv），其次是乙炔（20.16 ppbv）、烯烃（2.62 ppbv）和芳烃（1.55 ppbv）。基于正矩阵分解（PMF）模型的结果，燃煤（39.83%），交通相关的废气（26.87%），液化石油气/天然气（LPG/NG）的使用（17.32%），燃料蒸发和油漆的使用（9.02%），工业排放（6.96%）被区分。应用二次生成势来表征二次污染的可能性;结果表明，烷烃（27.30 ppbv）和烯烃21.42ppbv的臭氧生成潜势和烷烃的贡献占主导地位在高NOx条件下，二次有机气溶胶形成潜能（SOAFP）的浓度（1.05 μ g/m3）和芳烃（0.99 μ g/m3）几乎相等。然而，在低NOx条件下，芳烃（2.12 μ g/m3）占主导地位，烷烃（1.05 μ g/m3）的贡献较低。Monte Carlo模拟结果表明，1，3-丁二烯和苯暴露可能对当地居民产生潜在的致癌风险; PMF结果表明，减少交通和工业排放以及燃煤对控制致癌风险更为有效。该研究为决策者更有效地减少当地空气污染提供了重要的理论依据。
From November 2018 to March 2019, the mixing ratios of 57 types of volatile organic compounds (VOCs) were measured using gas chromatography-mass spectrometry in Shihezi. The results depicted that the average mixing ratios of VOCs were 58.48 ppbv and alkanes (34.15 ppbv) showed the largest contribution, followed by ethyne (20.16 ppbv), alkenes (2.62 ppbv), and aromatics (1.55 ppbv). Based on the positive matrix factorization (PMF) model result, coal burning (39.83%), traffic-related exhaust (26.87%), liquefied petroleum gas/natural gas usage (LPG/NG) (17.32%), fuel evaporation and paint usage (9.02%), and industrial emission (6.96%) were distinguished. Secondary formation potential was applied to demonstrate the probability of secondary pollution; the results indicated that alkanes (27.30 ppbv) and alkenes (21.42 ppbv) played leading roles in ozone formation potential (OFP) and the contributions of alkanes (1.05 mu g/m(3)) and aromatics (0.99 mu g/m(3)) were nearly equal for secondary organic aerosol formation potential (SOAFP) under high-NOx condition. However, under a low-NOx condition, aromatics (2.12 mu g/m(3)) dominated, and the contribution of alkanes (1.05 mu g/m(3)) was lower. Monte Carlo simulation results showed that exposure to 1,3-butadiene and benzene may contribute potential carcinogenic risks to local residents; PMF results showed that reducing traffic-related and industrial emissions as well as coal burning was more effective in controlling carcinogenic risks. This study provides a crucial theoretical basis for decision-makers to minimize local air pollution more effectively.