The high persistence of PFAS is sufficient for their management as a chemical class.

The high persistence of PFAS is sufficient for their management as a chemical class.
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PFAS 的高持久性足以将其作为化学品类别进行管理。

DOI:
10.1039/d0em00355g
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发表时间:
2020-12-16
期刊:
Environmental science. Processes & impacts
影响因子:
--
通讯作者:
Wang Z
Wang Z
中科院分区:
其他
文献类型:
--
作者:
Cousins IT;DeWitt JC;Glüge J;Goldenman G;Herzke D;Lohmann R;Ng CA;Scheringer M;Wang Z

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全氟烷基和多氟烷基物质是一类具有不同结构、性质、用途、生物累积潜力和毒性的合成有机物质。尽管具有高度多样性,但所有PFAS都是相似的,因为它们含有对环境和代谢降解具有极强抵抗力的全氟烷基部分。因此,绝大多数PFAS要么是不可降解的,要么最终转化为稳定的终末转化产物(仍为PFAS)。根据欧洲化学品法规,PFAS被归类为高持久性物质(vP)。我们认为,这种高持久性是足够的关注,他们的管理作为一个化学类别,并为所有“非必要”用途的全氟辛烷磺酸被淘汰。高持久性全氟辛烷磺酸的持续释放将导致浓度增加,并增加发生已知和未知影响的可能性。一旦发现不良反应,接触和相关影响将不容易逆转。扭转PFAS污染将是技术上的挑战,能源密集型,并为社会付出昂贵的代价,这在努力从受污染的土地和饮用水中去除PFAS中显而易见。
Per- and polyfluoroalkyl substances (PFAS) are a class of synthetic organic substances with diverse structures, properties, uses, bioaccumulation potentials and toxicities. Despite this high diversity, all PFAS are alike in that they contain perfluoroalkyl moieties that are extremely resistant to environmental and metabolic degradation. The vast majority of PFAS are therefore either non-degradable or transform ultimately into stable terminal transformation products (which are still PFAS). Under the European chemicals regulation this classifies PFAS as very persistent substances (vP). We argue that this high persistence is sufficient concern for their management as a chemical class, and for all “non-essential” uses of PFAS to be phased out. The continual release of highly persistent PFAS will result in increasing concentrations and increasing probabilities of the occurrence of known and unknown effects. Once adverse effects are identified, the exposure and associated effects will not be easily reversible. Reversing PFAS contamination will be technically challenging, energy intensive, and costly for society, as is evident in the efforts to remove PFAS from contaminated land and drinking water.
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