TY - JOUR

T1 - Passive air sampling of organochlorine pesticides, polychlorinated biphenyls, and polybrominated diphenyl ethers across the Tibetan plateau

AU - Wang, Xiao Ping

AU - Gong, Ping

AU - Yao, Tan Dong

AU - Jones, Kevin C.

PY - 2010/4/15

Y1 - 2010/4/15

N2 - 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.

AB - 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.

U2 - 10.1021/es9033759

DO - 10.1021/es9033759

M3 - Journal article

C2 - 20235613

AN - SCOPUS:77950933701

VL - 44

SP - 2988

EP - 2993

JO - Environmental Science and Technology

JF - Environmental Science and Technology

SN - 0013-936X

IS - 8

ER -