globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2015.05.025
Scopus记录号: 2-s2.0-84929465225
论文题名:
Analysis for sources of atmospheric α- and γ-HCH in gas and particle-associated phase in Dalian, China by multiple regression
作者: Li Q; , Li Y; , Wang X; , Zhang R; , Ma J; , Sun M; , Lv X; , Bao J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 114
起始页码: 32
结束页码: 38
语种: 英语
英文关键词: Gas phase ; Hexachlorocyclohexanes ; Multiple regression ; Particle-associated phase ; Sources
Scopus关键词: Elementary particle sources ; Isomers ; Regression analysis ; Wind ; Atmospheric concentration ; Gasphase ; Hexachlorocyclohexanes ; Increasing temperatures ; Meteorological condition ; Multiple regression analysis ; Multiple regressions ; Potential source regions ; Gases ; alpha hexachlorocyclohexane ; lindane ; air sampling ; ambient air ; gas phase reaction ; HCH ; pollutant source ; regression analysis ; spatiotemporal analysis ; air sampler ; ambient air ; Article ; atmosphere ; autumn ; gas ; isomerization ; priority journal ; seasonal variation ; spring ; summer ; temperature ; wind ; China ; Dalian ; Liaoning
Scopus学科分类: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
英文摘要: Atmospheric concentrations of α- and γ-hexachlorocyclohexanes were measured once a week in Dalian throughout 2008, using a high-volume air sampler, to estimate diurnal, monthly and seasonal variations. Multiple regression analysis was used to estimate the impact of selected meteorological conditions on atmospheric concentrations of hexachlorocyclohexanes and to identify the potential source regions. Overall, α- and γ-hexachlorocyclohexanes were mainly associated with the gas phase, with an annual mean gas-phase concentration of 36±30 and 10±9.8pgm-3 respectively. On the other hand, mean particle (PM10) associated concentrations throughout the year were 1.9±2.4 and 0.46±0.43pgm-3 respectively. Gas-phase concentration of α- and γ-hexachlorocyclohexanes peaked in the autumn season whereas highest concentrations in the particle phase were measured in spring. Ratio of α-/γ-isomer ranged from 3.7 to 7.4 in the gas phase which was close to the ratio in technical hexachlorocyclohexanes (5-7). In the particle-associated phase this ratio ranged from 1.2 to 3.8, with the exception of daytime samples in spring (up to 16) and summer seasons (up to 14) and this exception could be due to the isomerization from γ- to α- in ambient air, at least partly resulted from the impact of sunlight. Regression analysis showed that, at the sampling site, concentrations of α- and γ-hexachlorocyclohexanes in the gas phase were both elevated with increasing temperature and wind speed, whereas in the particle-associated phase their concentrations tended to remain stable. © 2015.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81676
Appears in Collections:气候变化事实与影响

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作者单位: College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China; National Research Centre for Environmental Toxicology, The University of Queensland, 39 Kessels Road, Coopers Plains, QLD, Australia; Shaanxi University of Science and Technology, Shaanxi, China; Key Laboratory of Western China's Environmental System, Ministry of Education, College of Earth and Environment Sciences, Lanzhou University, Lanzhou, China

Recommended Citation:
Li Q,, Li Y,, Wang X,et al. Analysis for sources of atmospheric α- and γ-HCH in gas and particle-associated phase in Dalian, China by multiple regression[J]. Atmospheric Environment,2015-01-01,114
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