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首页> 外文期刊>Environmental Science & Technology >Identification of Sulfonated and Hydroxy-Sulfonated Polychlorinated Biphenyl (PCB) Metabolites in Soil: New Classes of Intermediate Products of PCB Degradation?
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Identification of Sulfonated and Hydroxy-Sulfonated Polychlorinated Biphenyl (PCB) Metabolites in Soil: New Classes of Intermediate Products of PCB Degradation?

机译：土壤中磺化和羟基磺化的多氯联苯（PCB）代谢产物的鉴定：PCB降解的中间产物的新类别？

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摘要

In this paper we describe the identification of two classes of contaminants: sulfonated-PCBs and hydroxy-sulfonated-PCBs. This is the first published report of the detection of these chemicals in soil. They were found, along with hydroxy-PCBs, in soil samples coming from a site historically contaminated by the industrial production of PCBs and in background soils. Sulfonated-PCB levels were approximately 0.4-0.8% of the native PCB levels in soils and about twice the levels of hydroxy-sulfonated-PCBs and hydroxy-PCBs. The identification of sulfonated-PCBs was confirmed by the chemical synthesis of reference standards, obtained through the sulfonation of an industrial mixture of PCBs. We then reviewed the literature to investigate for the potential agents responsible for the sulfonation. Furthermore, we predicted their physicochemical properties and indicate that, given the low pK(a) of sulfonated- and hydroxy-sulfonated-PCBs, they possess negligible volatility, supporting the case for in situ formation from PCBs. This study shows the need of understanding their origin, their role in the degradation path of PCBs, and their fate, as well as their (still unknown) toxicological and ecotoxicological properties.
机译：在本文中，我们描述了两类污染物的识别：磺化多氯联苯和羟基磺化多氯联苯。这是在土壤中检测这些化学物质的第一份公开报告。它们与羟基多氯联苯一起在历史上曾被多氯联苯工业生产污染的地点的土壤样品中和背景土壤中被发现。磺化PCB含量约为土壤中天然PCB含量的0.4-0.8％，约为羟基磺化PCB和羟基PCB含量的两倍。磺化多氯联苯的鉴定已通过参考标准品的化学合成得到证实，该参考标准是通过将多氯联苯的工业混合物磺化而获得的。然后，我们回顾了文献以研究潜在的磺化剂。此外，我们预测了它们的理化性质，并指出，鉴于磺化和羟基磺化多氯联苯的pK（a）低，它们的挥发性可忽略不计，支持从多氯联苯就地形成的情况。这项研究表明需要了解它们的来源，它们在多氯联苯降解途径中的作用，其命运以及其（尚不为人所知的）毒理学和生态毒理学特性。

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