title: [Source apportionment of VOCs in the northern suburb of Nanjing in summer].
abstract: Hourly concentrations of ambient volatile organic compounds (VOCs) were sampled in August 2012 in the northern suburb of Nanjing. Emissions of VOCs were analyzed by using PMF (positive matrix factorization) and CPF (conditional probability function). The hourly average mixing ratio of the TVOCs in summer was (33.84 +/- 27.77) x 10(-9), with a bimodal diurnal variation trend. 49.3% of the TVOCs were alkanes, 24.4% were alkenes, 18.5% were aromatics and 7.81% were acetylene. Five sources were identified as summer major contributors to ambient VOCs concentrations by PMF. 33.1% of the total VOCs was attributed to vehicle related emissions, 25.8% to fuel evaporation, 23.2% to industrial emissions, 8.1% to solvent evaporation and 9.7% to plant emissions. For alkanes, vehicle emissions, industrial emissions, fuel and solvent evaporation accounted for 23.7%, 35.3%, 31.3% and 2%, respectively. For alkenes, fuel evaporation accounted for 41.1% , industrial emissions for 18.4%, and vehicle emission for 24.3%. Vehicle emission was the major contributor to aromatics, accounting for 49.2%, followed by solvent evaporation, which accounted for 30.8%.
authors.forename: Hui
authors.initials: H
authors.lastname: Yang
authors.forename: Bin
authors.initials: B
authors.lastname: Zhu
authors.forename: Jin-Hui
authors.initials: JH
authors.lastname: Gao
authors.forename: Yong-Yu
authors.initials: YY
authors.lastname: Li
authors.forename: Li
authors.initials: L
authors.lastname: Xia
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000473:Alkanes / Q000032:analysis; D000475:Alkenes / Q000032:analysis; D002681:China; D002947:Cities; D004784:Environmental Monitoring; D012621:Seasons; D012997:Solvents / Q000032:analysis; D001335:Vehicle Emissions; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D000473:Alkanes; D000475:Alkenes; D012997:Solvents; D001335:Vehicle Emissions; D055549:Volatile Organic Compounds