Passive air sampling of organochlorine pesticides, polychlorinated biphenyls, and polybrominated diphenyl ethers across the Tibetan plateau

Wang, Xiao Ping and Gong, Ping and Yao, Tan Dong and Jones, Kevin C. (2010) Passive air sampling of organochlorine pesticides, polychlorinated biphenyls, and polybrominated diphenyl ethers across the Tibetan plateau. Environmental Science and Technology, 44 (8). pp. 2988-2993. ISSN 0013-936X

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Abstract

So far there are limited data on persistent organic pollutants (POPs) in the atmosphere of the Tibetan Plateau. XAD 2-resin based passive air samplers were therefore deployed for 1 year (between July 2007-June 2008) at 16 locations across the Tibetan Plateau. Based on previously reported sampling rates (R) derived in the north and south America, and their correlations with atmospheric temperature and pressure, R values in the present study were in the range of 2.2?3.3 m3 d1 (average = 2.7 ± 0.3). Derived air concentrations (pg/m3) ranged as follows: DDTs, 5?75; HCHs, 0.1?36; α-endosulfan, 0.1?10; HCB, 2.8?80; sum of 15 PCBs, 1.8?8.2; and sum of 9 PBDEs, 0.1?8.3. The highest DDTs occurred at Qamdo, where the sampling site is near to farm land, indicating the spatial distribution of DDTs across the plateau may be influenced by scattered local usage of DDT. Higher levels of HCHs were observed at sites with high elevation (>4000 m) and close to the China-India border, indicating possible long-range atmospheric transport. The highest levels of HCB, PCBs, and PBDEs were found at a site impacted by forest fire during the sampling campaign.

Item Type:
Journal Article
Journal or Publication Title:
Environmental Science and Technology
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2304
Subjects:
ID Code:
137797
Deposited By:
Deposited On:
14 Oct 2019 15:05
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Nov 2020 08:00