Atmospheric polycyclic aromatic hydrocarbons in north China: a winter-time study.

Atmospheric polycyclic aromatic hydrocarbons in north China: a winter-time study. Research Abstract Details 

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Atmospheric polycyclic aromatic hydrocarbons in north China: a winter-time study. Abstract Text:

Shuzhen Liu,Shu Tao,Wenxin Liu,Yanan Liu,Han Dou,Jingyu Zhao,Luguang Wang,Jingfei Wang,Zaifeng Tian,Yuan Gao,

The contamination and outflow of atmospheric polycyclic aromatic hydrocarbons (PAHs) in the Chinese Northern Plain, a region with a total area of 300 000 km2 and a high PAH emission density, were investigated. Polyurethane foam (PUF) and PM10 samples were collected at 46 sites located in urban, rural (towns or villages), and control (remote mountain) areas in the winter from November 2005 to February 2006. The observed concentrations of atmospheric PAHs were generally higher than those reported for developed countries and southern Chinese cities. It was found that there was no significant difference in air PAH concentrations between the urban and the rural areas (514 +/- 563 ng/m3 and 610 +/- 645 ng/ m3, respectively), while the PAH concentrations at the control sites (57.1 +/- 12.6 ng/m3) were 1 order of magnitude lower than those at the other sites. The primary reason for the similarity in PAH concentrations between urban and rural areas was the fact that the predominant sources of biomass and domestic coal combustion were widely spread over the study area. The partition constants (K(PM10)) of PAHs were significantly correlated to the corresponding values of subcooled liquid-vapor pressure (pL0). However, the regression slopes of log K(PM10) versus log pL0 were much steeper than -1, indicating adsorption dominated over absorption. Three distinct patterns of outflow from the study area were identified by forward trajectory and cluster analysis.

Atmospheric polycyclic aromatic hydrocarbons in north China: a winter-time study. Publishing Authors By Initials

S Liu,S Tao,W Liu,Y Liu,H Dou,J Zhao,L Wang,J Wang,Z Tian,Y Gao,

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Atmospheric polycyclic aromatic hydrocarbons in north China: a winter-time study. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Environmental science & technology

VOLUME: 41

Page Numbers: 8256-61

Journal Abbreviation: Environ. Sci. Technol.

ISSN: 0013-936X

DAY: 15

MONTH: Dec

YEAR: 2007

Atmospheric polycyclic aromatic hydrocarbons in north China: a winter-time study. Information

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LANGUAGE: eng

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AFFILIATION: Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.

Country: United States

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MEDLINETA: Environ Sci Technol

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