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首页> 外文期刊>Environmental Science & Technology >Persistent Organochlorine Residues in Air, Water, Sediments, and Soils from the Lake Baikal Region, Russia
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Persistent Organochlorine Residues in Air, Water, Sediments, and Soils from the Lake Baikal Region, Russia

机译：来自俄罗斯贝加尔湖地区的空气，水，沉积物和土壤中的持久性有机氯残留

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摘要

Contamination of semivolatile organochlorines (OCs) such as hexachlorobenzene (HCB), hexachlorocyclohexanes (HCHs), DDTs, chlordanes, and polychlorinated biphenyls (PCBs) was assessed in air, water, sediments, and soils from the Lake Baikal region, Russia. Comparison of the residue levels in the lake with those in other regions suggested the presence of local sources of DDTs and PCBs, although the residues were considered to be lower than those in the low-latitude areas in the eastern Asia and Oceania. Larger proportions of p,p′-DDT to total DDTs and similarities of PCB congener compositions to a Russian technical PCB formation were found in the samples analyzed, implying their usages nearby the lake. The estimated fluxes of OCs by gas exchange across the air—water interface applying the two-film model indicated that the lake water plays a role as a sink for HCB, HCHs, and DDTs and also serves as a source for PCBs. The magnitude for PCB volatilization in this lake was found to be smaller than those in the Great Lakes for which the values have been previously reported.
机译：在俄罗斯贝加尔湖地区的空气，水，沉积物和土壤中评估了六氯苯（HCB），六氯环己烷（HCH），滴滴涕，氯丹和多氯联苯（PCB）等半挥发性有机氯（OC）的污染。将湖泊中的残留水平与其他地区的残留水平进行比较，表明存在滴滴涕和多氯联苯的本地来源，尽管该残留量被认为低于东亚和大洋洲低纬度地区的残留量。在分析的样品中发现了p，p'-DDT占总DDT的比例较大，并且PCB同类成分与俄罗斯技术PCB的相似性，这表明它们在湖附近的用途。利用两层膜模型通过气-水界面上的气体交换估算的OCs通量表明，湖水起着HCB，HCH和DDT的汇的作用，也充当了PCB的来源。发现该湖中多氯联苯挥发的幅度小于以前报道过的五大湖。

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