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首页> 外文期刊>Environmental Science & Technology >Efficient Decomposition of Environmentally Persistent Perfluorooctanesulfonate and Related Fluorochemicals Using Zerovalent Iron in Subcritical Water
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Efficient Decomposition of Environmentally Persistent Perfluorooctanesulfonate and Related Fluorochemicals Using Zerovalent Iron in Subcritical Water

机译：亚临界水中零价铁对环境持久性全氟辛烷磺酸和相关氟化物的有效分解

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摘要

Decomposition of perfluorooctanesulfonate (PFOS) and related chemicals in subcritical water was investigated.Although PFOS demonstrated little reactivity in pure subcritical water,addition of zerovalent metals to the reaction system enhanced the PFOS decomposition to form F~-ions,with an increasing order of activity of no metal approx= Al < Cu < Zn Fe.Use of iron led to the most efficient PFOS decomposition:When iron powder was added to an aqueous solution of PFOS (93-372 muM) and the mixture was heated at 350 deg C for 6 h,PFOS concentration in the reaction solution fell below 2.2 muM (detection limit of HPLC with conductometric detection),with formation of F~-ions with yields [i.e.,(moles of F~- formed)/(moles of fluorine content in initial PFOS) x 100] of 46.2-51.4% and without any formation of perfluorocarboxylic acids.A small amount of CHF_3 was detected in the gas phase with a yield [i.e.,(moles of CHF_3)/(moles of carbon content in initial PFOS) x 100] of 0.7%,after the reaction of PFOS (372 muM) with iron at 350 deg C for 6 h.Spectroscopic measurements indicated that PFOS in water markedly adsorbed on the iron surface even at room temperature,and the adsorbed fluorinated species on the iron surface decomposed with rising temperature,with prominent release of F~- ions to the solution phase above 250 deg C.This method was also effective in decomposing other perfluoroalkylsulfonates bearing shorter chain (C_2-C_6) perfluoroalkyl groups and was successfully applied to the decomposition,of PFOS contained in an antireflective coating agent used in semiconductor manufacturing.
机译：尽管全氟辛烷磺酸在纯亚临界水中表现出很少的反应性，但研究了全氟辛烷磺酸盐（PFOS）和相关化学物质的分解，但是在反应体系中添加零价金属会促进PFOS分解形成F〜-离子，并以增加的活性顺序几乎没有金属的量= Al

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  • 来源
    《Environmental Science & Technology》 |2006年第3期|p.1049-1054|共6页
  • 作者

    HISAO HORI; YUMIKO NAGAOKA; ARI YAMAMOTO; TAIZO SANO; NOBUYOSHI YAMASHITA;

  • 作者单位

    National Institute of Advanced Industrial Science and Technology (AIST),AIST Tsukuba West,16-1 Onogawa, Tsukuba 305-8569,Japan;

    National Institute of Advanced Industrial Science and Technology (AIST),AIST Tsukuba West,16-1 Onogawa, Tsukuba 305-8569,Japan;

    National Institute of Advanced Industrial Science and Technology (AIST),AIST Tsukuba West,16-1 Onogawa, Tsukuba 305-8569,Japan;

    National Institute of Advanced Industrial Science and Technology (AIST),AIST Tsukuba West,16-1 Onogawa, Tsukuba 305-8569,Japan;

    National Institute of Advanced Industrial Science and Technology (AIST),AIST Tsukuba West,16-1 Onogawa, Tsukuba 305-8569,Japan;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
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