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Persistent organic pollutants in the Tibetan surface soil:spatial distribution, air–soil exchange and implications for global cycling

Wang, Xiao-ping and Sheng, Jiu-jiang and Gong, Ping and Xue, Yong-gang and Yao, Tan-dong and Jones, Kevin C. (2012) Persistent organic pollutants in the Tibetan surface soil:spatial distribution, air–soil exchange and implications for global cycling. Environmental Pollution, 170. pp. 145-151. ISSN 0269-7491

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Abstract

There are limited data on persistent organic pollutants (POPs) in the soils of the Tibetan Plateau. This paper presents data from a survey of organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in 40 background surface (0–5 cm) soils of the Tibetan Plateau. Soil concentrations (pg/g, dw) ranged as follows: DDTs, 13-7700; HCHs, 64-847; HCB, 24-564; sum of 15 PCBs, 75-1021; and sum of 9 PBDEs, below detection limit −27. Soil DDT, HCB, PCB and PBDE concentrations were strongly influenced by soil organic carbon content. HCH concentrations were clearly associated with the proximity to source regions in south Asia. The air–soil equilibrium status of POPs suggested the Tibetan soils may be partial “secondary sources” of HCB, low molecular weight PCBs and HCHs and will likely continue to be “sinks” for the less volatile DDE and DDT.

Item Type: Article
Journal or Publication Title: Environmental Pollution
Uncontrolled Keywords: Tibetan Plateau ; Air–soil exchange ; Persistent organic pollutants
Subjects: UNSPECIFIED
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 60250
Deposited By: ep_importer_pure
Deposited On: 26 Nov 2012 11:26
Refereed?: Yes
Published?: Published
Last Modified: 01 Oct 2013 15:30
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/60250

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