Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China.
Environ Pollut. 2012 Nov;170:145-51. doi: 10.1016/j.envpol.2012.06.012. Epub 2012 Jul 13.
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.
青藏高原土壤中持久性有机污染物（POPs）的数据有限。本文提供了对青藏高原 40 个背景表层（0-5 厘米）土壤中有机氯农药（OCPs）、多氯联苯（PCBs）和多溴二苯醚（PBDEs）的调查数据。土壤浓度（pg/g，干重）范围如下：滴滴涕为 13-7700；六氯环己烷为 64-847；六氯苯为 24-564；15 种 PCBs 的总和为 75-1021；9 种 PBDEs 的总和低于检测限-27。土壤滴滴涕、六氯苯、多氯联苯和 PBDE 浓度强烈受土壤有机碳含量的影响。六氯环己烷浓度与南亚源区的临近度明显相关。POPs 的气-土平衡状态表明，青藏高原土壤可能是六氯苯、低分子量 PCBs 和六氯环己烷的局部“次生源”，并且可能继续成为较不易挥发的滴滴涕和滴滴伊的“汇”。
