Assessment of polychlorinated biphenyls and polybrominated diphenyl ethers in Tibetan butter

Chemosphere
Yawei WangGuibin Jiang

Abstract

The Tibetan plateau is considered a potential cold trap for persistent organic pollutants (POPs) and plays an important role in the global long-range transport of these compounds. This present work surveyed the concentrations of polychlorinated biphenyl (PCBs) and polybrominated diphenyl ethers (PBDEs) in Tibetan butter samples collected from different prefectures in Tibet autonomous region (TAR). summation operator(25)PCB concentrations ranged from 137 to 2518 pg g(-1) with a mean value 519 pg g(-1), which were far lower than those in the butter from other regions in the world. The highest level was found in butter from Sichuan province, which is located to the east of the Tibetan plateau and the lowest value was in samples from southeast TAR. The average concentration of summation Sigma(12)PBDE was 125 pg g(-1). The sample with highest and lowest summation Sigma(12)PBDE concentration (955 and 18.0 pg g(-1)) was from the south and southeast part of the plateau, respectively. Back trajectory model implied that the sources of these two groups of POPs were by atmospheric deposition in south, whereas the western plateau was mainly influenced by the tropical monsoon from south Asia. Air currents from Sichuan and Gansu province are ...Continue Reading

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Citations

Aug 4, 2010·Analytical and Bioanalytical Chemistry·Lina KantianiDamià Barceló
Feb 26, 2013·Environmental Science and Pollution Research International·Wan-Li MaYi-Fan Li
Jul 28, 2013·Environmental Science & Technology·Chubashini ShunthirasinghamMehran Alaee
Mar 16, 2013·International Journal of Hygiene and Environmental Health·Kun NiShijie Liu

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