title: Evolution of chemical composition of fogwater in winter in Chengdu, China.
abstract: Two sampling sites representing the urban and suburban area of Chengdu, China were sampled and analyzed for selected chemicals to characterize the evolution of the chemical composition of fogwater. A trend of total organic carbon (TOC) > total nitrogen (TN) > total inorganic carbon (TIC) was observed for both sites. Variation of inorganic ions indicated that inorganic pollutants were not accumulated in the fog. Concentrations of n-alkanes (C11-C37) at the urban site ranged from 7.58 to 27.75 ng/mL while at the suburban site concentrations were 2.57-21.55 ng/mL. The highest concentration of n-alkanes was observed in the mature period of fog (393.12 ng/mL) which was more than ten times that in the fog formation period (27.83 ng/mL) and the fog dissipation period (14.87 ng/mL). Concentrations of Sigma15PAHs were in the range of 7.27-38.52 ng/mL at the urban site and 2.59-22.69 ng/mL at the suburban site. Contents of PAHs in the mature period of fog (27.15 ng/mL) > fog dissipation period (11.59 ng/mL) > fog formation period (6.42 ng/mL). Concentrations of dicarboxylic acids (C5-C9) ranged from 10.92 to 40.78 ng/mL, with glutaric acid (C5) as the dominant dicarboxylic acid. These data provide strong indications of the accumulation of certain organic chemicals of environmental concern in fog and fog water, and provide additional insights about processes in urban and suburban air acting on organic chemicals with similar physical chemical properties.
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China. belling15@126.com
authors: Hongling
authors: H
authors: Yin
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China.
authors: Zhixiang
authors: Z
authors: Ye
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China.
authors: Yingchun
authors: Y
authors: Yang
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China.
authors: Wei
authors: W
authors: Yuan
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China.
authors: Changyan
authors: C
authors: Qiu
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China.
authors: Huawei
authors: H
authors: Yuan
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China.
authors: Min
authors: M
authors: Wang
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China.
authors: Shiping
authors: S
authors: Li
authors: College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China.
authors: Changwu
authors: C
authors: Zou
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D002681:China; D003998:Dicarboxylic Acids / Q000032:analysis; D004784:Environmental Monitoring; D006863:Hydrogen-Ion Concentration; D007287:Inorganic Chemicals / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis; D012621:Seasons; D014887:Weather
chemical_list: D000393:Air Pollutants; D003998:Dicarboxylic Acids; D007287:Inorganic Chemicals; D009930:Organic Chemicals; D011084:Polycyclic Aromatic Hydrocarbons