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首页> 外文期刊>Environmental Science & Technology >Decades-Scale Degradation of Commercial, Side-Chain, Fluorotelomer-Based Polymers in Soils and Water
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Decades-Scale Degradation of Commercial, Side-Chain, Fluorotelomer-Based Polymers in Soils and Water

机译：在土壤和水中的商用侧链含氟调聚物的聚合物的数十年降解

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摘要

Fluorotelomer-based polymers (FTPs) are the primary product of the fluorotelomer industry. Here we report on a 376-day study of the degradability of two commercial acrylate-linked FTPs in four saturated soils and in water. Using an exhaustive serial extraction, we report GC/MS and LC/MS/MS results for 50 species including fluorotelomer alcohols and acids, and perfluorocarboxylates. Modeling of seven sampling rounds, each consisting of ≥5 replicate microcosm treatments, for one commercial FTP in one soil yielded half-life estimates of 65-112 years and, when the other commercial FTP and soils were evaluated, the estimated half-lives ranged from 33 to 112 years. Experimental controls, consisting of commercial FTP in water, degraded roughly at the same rate as in soil. A follow-up experiment, with commercial FTP in pH 10 water, degraded roughly 10-fold faster than the circum-neutral control suggesting that commercial FTPs can undergo OH~--mediated hydrolysis. 8:2Fluorotelomer alcohol generated from FTP degradation in soil was more stable than without FTP present suggesting a clathrate guest-host association with the FTP. To our knowledge, these are the only degradability-test results for commercial FTPs that have been generated using exhaustive extraction procedures. They unambiguously show that commercial FTPs, the primary product of the fluorotelomer industry, are a source of fluorotelomer and perfluorinated compounds to the environment.
机译：含氟调聚物的聚合物（FTPs）是含氟调聚物行业的主要产品。在这里，我们报告了一项为期376天的研究，研究了两种商业丙烯酸酯连接的FTPs在四种饱和土壤和水中的可降解性。使用详尽的系列萃取，我们报告了50种物质的GC / MS和LC / MS / MS结果，包括氟调聚物，醇和酸以及全氟羧酸盐。对一个土壤中的一种商品FTP进行七个采样回合的建模，每个回合包括≥5个重复的微观世界处理，得出的半衰期估计值为65-112年，当评估其他商品FTP和土壤时，估计的半衰期为从33年到112年。由水中的商用FTP组成的实验控件的降解速率与土壤中的降解速率大致相同。后续实验中，商业FTP在pH 10的水中降解的速度比环境中性对照快约10倍，这表明商业FTP可以经历OH-介导的水解。 8：2从土壤中FTP降解产生的氟代端粒醇比没有FTP的情况更稳定，表明与FTP形成笼状的客体-宿主缔合。据我们所知，这是使用详尽提取程序生成的商用FTP的唯一可降解性测试结果。他们清楚地表明，商用FTP是含氟调聚物行业的主要产品，是环境中含氟调聚物和全氟化化合物的来源。

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  • 来源
    《Environmental Science & Technology》 |2015年第2期|915-923|共9页
  • 作者

    John W. Washington; Thomas M. Jenkins; Keegan Rankin; Jonathan E. Naile;

  • 作者单位

    U.S. Environmental Protection Agency, National Exposure Research Laboratory, Athens, Georgia 30605, United States;

    Environmental Employment Program, Athens, Georgia 30605, United States;

    Department of Chemistry, University of Toronto, Toronto, Ontario Canada 141119;

    U.S. Environmental Protection Agency, National Exposure Research Laboratory, Athens, Georgia 30605, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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