PERSISTENT ORGANIC POLLUTANTS IN THE ATMOSPHERE OF THE MOUNTAINS OF WESTERN SICHUAN, CHINA
The distribution of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in air along an altitudinal transect on Balang Mountain in western China was measured by deploying XAD-2 resin based passive air samplers (PAS) at seven sites with elevations ranging from 1242 to 3619 meters above sea level for two six-month periods ending in spring and autumn 2006. Concentrations were determined using gas chromatography-high resolution mass spectrometry (GC-HRMS). Concentrations of hexachlorobenzene were highest, followed by hexachlorocyclohexanes, DDT-related compounds and tri- and tetrachlorinated biphenyls. Except for hexachlorobenzene, there were clear seasonal variations for most compounds with concentration levels in summer being higher by a factor of 2 to 4. Overall, the presence of OCPs and PCBs in mountain air of Western Sichuan is primarily due to long-range atmospheric transport, with additional contributions from secondary local sources in summer, especially at higher elevations.
Liu W J Chen D Z Liu X D Westgate J N Wania F
Chinese Research Academy of Environmental Sciences,Beijing,100012,China Cold and Arid Regions Enviro Chinese Research Academy of Environmental Sciences,Beijing,100012,China National Research Center for Chinese Research Academy of Environmental Sciences,Beijing,100012,China Department of Chemistry and Department of Physical and Environmental Sciences,University of Toronto
国际会议
北京
英文
1-4
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）