Guo Songjun, Yang Fumo, Tan Jihua, Duan Jingchun
Environ Eng Sci. 2012 Apr;29(4):262-269. doi: 10.1089/ees.2010.0421.
A first study of nonmethane hydrocarbons (NMHCs) on hazy and normal days was performed in Foshan for providing deep insight into the local deteriorating air quality. Ethane, propane, i-pentane, ethene, propene, ethyne, benzene, and toluene were eight most abundant compounds, accounting for 71%-85% of total NMHCs. Most hydrocarbons showed much higher levels on hazy days than normal days together with hydrocarbon/ethyne ratios and diurnal variations, indicating hazy days are more dominated by vehicular emission. Correlation coefficients (R(2)) of ethane, propane, ethane, propene, benzene, and total NMHCs with ethyne were 0.62-0.83, indicating these compounds are mainly related to vehicular emission. R(2) analysis indicated that solvent usage is responsible for toluene and other aromatic hydrocarbons (e.g., ethylbezene). Benzene/toluene (B/T) ratio was 0.44±0.23 during whole sampling periods, again indicating vehicular emission is the dominant source. Lower B/T ratio (0.30±0.14) on hazy days than that (0.58±0.21) on normal days suggested that solvent usage emitted toluene.
在佛山进行了首次关于雾霾天和正常天非甲烷碳氢化合物（NMHCs）的研究，以便深入了解当地空气质量恶化情况。乙烷、丙烷、异戊烷、乙烯、丙烯、乙炔、苯和甲苯是八种含量最高的化合物，占总NMHCs的71%-85%。大多数碳氢化合物在雾霾天的含量比正常天高得多，同时碳氢化合物/乙炔比率和日变化表明，雾霾天受机动车排放影响更大。乙烷、丙烷、乙烯、丙烯、苯和总NMHCs与乙炔的相关系数（R(2)）为0.62-0.83，表明这些化合物主要与机动车排放有关。R(2)分析表明，甲苯和其他芳烃（如乙苯）的来源是溶剂使用。整个采样期间苯/甲苯（B/T）比率为0.44±0.23，再次表明机动车排放是主要来源。雾霾天的B/T比率（0.30±0.14）低于正常天（0.58±0.21），这表明溶剂使用排放了甲苯。
