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 Organochlorine pesticides and polychlorinated biphenyls in Tibetan forest soil: profile distribution and processes 相关领域
环境科学
杀虫剂
环境化学
污染物
浸出（土壤学）
高原（数学）
污染
总有机碳
有机氯农药
土层
挥发
土壤水分
土壤科学
化学
生态学
数学分析
有机化学
生物
数学
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Tibetan forests are located in the southeastern Tibetan Plateau, where the climate is dominated by the Indian monsoon. Due to the affinity to pollution sources and high organic carbon stocks, the fate of persistent organic pollutants in the Tibetan forests should be given more attention. In this study, seven soil profiles were investigated to obtain the vertical distribution of the organochlorine pesticides and polychlorinated biphenyls (PCBs) in the Tibetan forest soil. The results indicate that the DDTs are highly stable in the soil, with limited volatilization and leaching, while the more volatile PCBs were found in the deeper mineral layer, which means that they can translocate through the organic layer and move farther downward into the deep soil. The airto-ground fluxes (estimated by the age of the organic layer) of the DDTs are one magnitude higher than those reported in a study on the Alps, suggesting the higher accumulation of DDTs by the Tibetan forest. |
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