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Based on confirming that the linear perfluorohexanesulfonate (L-PFHxS) could be degraded and defluorinated in a biomimetic system, the degradation products of isotope-labelled (13C) L-PFHxS (MPFHxS) were qualitatively analyzed, and the degradation mechanisms of L-PFHxS were then clarified. Two 13C-labeled perfluorocarboxylates (PFCAs, i.e. 13C3-perfluorohexanoate and 13C3-perfluorononanoate), eight native PFCAs (perfluorocarbon chain length ranged from C1 to C8), and seven native perfluoroalkylsulfonates (PFSAs, perfluorocarbon chain length ranging from C3 to C8, including linear and branched PFHxS), had been identified as the biomimetic degradation products of MPFHxS. The degradation pathways of L-PFHxS were proposed as follows: L-PFHxS were firstly reduced to C6F13· radical by cleavage of C-S bond, and then transformed to perfluorohexanoate through a series of hydrolysis. C6F13· radical or/and L-PFHxS were further reduced to form CnF2n+1· (n = 1, 2or 3) radicals, and these radicals were chain-lengthened by stepwise addition of 0 ~ 2C3F6 moieties and eventually transformed to various degradation products with different perfluorocarbon chain length via a series of hydrolysis (PFCAs) or combination reaction with sulfonyl hydroxide radical (PFSAs).

, authors=Ling-xin CHEN1, Zhi-min YANG2, Shu-po LIU1, Zhen-ming ZHOU1, Fei LI1, *, authorsList=Ling-xin CHEN, Zhi-min YANG, Shu-po LIU, Zhen-ming ZHOU, Fei LI, authorCompany=null, correspAuthors=Fei LI, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314917798539789271, articleId=1314917797814174675, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=直链全氟己磺酸(L-PFHxS)仿生降解特性, columnId=1314917798195856342, journalTitle=中国环境科学, columnName=新污染物与毒理, runingTitle=null, highlight=null, articleAbstract=

在确定直链全氟己磺酸(L-PFHxS)可仿生降解脱氟的基础上,定性分析了同位素(13C)标记L-PFHxS(MPFHxS)的降解产物,以明确L-PFHxS仿生降解机理.研究结果表明,仿生降解MPFHxS可生成两种13C标记全氟羧酸类(PFCAs,即13C3-全氟己酸和13C3-全氟壬酸)、8种非13C标记PFCAs类(全氟碳链长度C1 ~ C8)和7种非13C标记全氟磺酸类(全氟碳链长度C3 ~ C8,含两种PFHxS异构体,即直链和支链PFHxS)降解产物.L-PFHxS降解途径如下:L-PFHxS分子中的C-S键首先断裂生成C6F13·,C6F13·自由基经一系列水解生成PFHxA;然后,C6F13·自由基或L-PFHxS分子在不同位置断裂C-C键生成CnF2n+1·自由基(n = 1,2或3),CnF2n+1·自由基(n = 1,2或3)逐步增加0 ~ 2个C3F6基团,后经一些列水解生成不同全氟链长PFCAs或与·SO3H自由基结合生成不同全氟链长PFSAs.

, authors=陈铃心1, 杨志敏2, 刘淑坡1, 周真明1, 李飞1, *, authorsList=陈铃心, 杨志敏, 刘淑坡, 周真明, 李飞, authorCompany=null, correspAuthors=李飞, authorNote=

陈铃心(2004-),女,福建厦门人,本科生,主要从事持久性有机污染物控制.发表论文3篇..

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* 责任作者,教授,
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陈铃心(2004-),女,福建厦门人,本科生,主要从事持久性有机污染物控制.发表论文3篇..

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陈铃心(2004-),女,福建厦门人,本科生,主要从事持久性有机污染物控制.发表论文3篇..

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直链全氟己磺酸(L-PFHxS)仿生降解特性
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陈铃心 1 , 杨志敏 2 , 刘淑坡 1 , 周真明 1 , 李飞 1, *
中国环境科学 | 新污染物与毒理 2025,45(8): 4620-4627
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中国环境科学 |新污染物与毒理 2025 , 45 (8) : 4620 -4627
直链全氟己磺酸(L-PFHxS)仿生降解特性
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陈铃心1 , 杨志敏2, 刘淑坡1, 周真明1, 李飞1, *
作者信息
  • 1.华侨大学土木工程学院,福建 厦门 361021
  • 2.华侨大学分析测试中心,福建 厦门 361021
通讯作者:
* 责任作者,教授,
作者简介:

陈铃心(2004-),女,福建厦门人,本科生,主要从事持久性有机污染物控制.发表论文3篇..

Biomimetic degradation characteristics of linear perfluorohexanesulfonate (L-PFHxS)
Ling-xin CHEN1 , Zhi-min YANG2, Shu-po LIU1, Zhen-ming ZHOU1, Fei LI1, *
Affiliations
  • 1.Collge of Civil Engineering, Huaqiao University, Xiamen 361021, China
  • 2.Analytical and Testing Center of Huaqiao University, Xiamen 361021, China
出版时间: 2025-08-20
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在确定直链全氟己磺酸(L-PFHxS)可仿生降解脱氟的基础上,定性分析了同位素(13C)标记L-PFHxS(MPFHxS)的降解产物,以明确L-PFHxS仿生降解机理.研究结果表明,仿生降解MPFHxS可生成两种13C标记全氟羧酸类(PFCAs,即13C3-全氟己酸和13C3-全氟壬酸)、8种非13C标记PFCAs类(全氟碳链长度C1 ~ C8)和7种非13C标记全氟磺酸类(全氟碳链长度C3 ~ C8,含两种PFHxS异构体,即直链和支链PFHxS)降解产物.L-PFHxS降解途径如下:L-PFHxS分子中的C-S键首先断裂生成C6F13·,C6F13·自由基经一系列水解生成PFHxA;然后,C6F13·自由基或L-PFHxS分子在不同位置断裂C-C键生成CnF2n+1·自由基(n = 1,2或3),CnF2n+1·自由基(n = 1,2或3)逐步增加0 ~ 2个C3F6基团,后经一些列水解生成不同全氟链长PFCAs或与·SO3H自由基结合生成不同全氟链长PFSAs.

直链全氟己磺酸(L-PFHxS)  /  仿生降解  /  降解产物  /  降解途径

Based on confirming that the linear perfluorohexanesulfonate (L-PFHxS) could be degraded and defluorinated in a biomimetic system, the degradation products of isotope-labelled (13C) L-PFHxS (MPFHxS) were qualitatively analyzed, and the degradation mechanisms of L-PFHxS were then clarified. Two 13C-labeled perfluorocarboxylates (PFCAs, i.e. 13C3-perfluorohexanoate and 13C3-perfluorononanoate), eight native PFCAs (perfluorocarbon chain length ranged from C1 to C8), and seven native perfluoroalkylsulfonates (PFSAs, perfluorocarbon chain length ranging from C3 to C8, including linear and branched PFHxS), had been identified as the biomimetic degradation products of MPFHxS. The degradation pathways of L-PFHxS were proposed as follows: L-PFHxS were firstly reduced to C6F13· radical by cleavage of C-S bond, and then transformed to perfluorohexanoate through a series of hydrolysis. C6F13· radical or/and L-PFHxS were further reduced to form CnF2n+1· (n = 1, 2or 3) radicals, and these radicals were chain-lengthened by stepwise addition of 0 ~ 2C3F6 moieties and eventually transformed to various degradation products with different perfluorocarbon chain length via a series of hydrolysis (PFCAs) or combination reaction with sulfonyl hydroxide radical (PFSAs).

L-PFHxS  /  biomimetic degradation  /  degradation products  /  degradation pathways
陈铃心, 杨志敏, 刘淑坡, 周真明, 李飞. 直链全氟己磺酸(L-PFHxS)仿生降解特性. 中国环境科学, 2025 , 45 (8) : 4620 -4627 .
Ling-xin CHEN, Zhi-min YANG, Shu-po LIU, Zhen-ming ZHOU, Fei LI. Biomimetic degradation characteristics of linear perfluorohexanesulfonate (L-PFHxS)[J]. China Environmental Science, 2025 , 45 (8) : 4620 -4627 .
  • 厦门市自然科学基金资助项目(3502Z202473046)
  • 国家自然科学基金资助项目(51878300)
  • 福建省教育教学改革项目(FBJG20220095)
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  • 接收时间:2025-01-03
  • 首发时间:2026-10-08
  • 出版时间:2025-08-20
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  • 收稿日期:2025-01-03
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厦门市自然科学基金资助项目(3502Z202473046)
国家自然科学基金资助项目(51878300)
福建省教育教学改革项目(FBJG20220095)
作者信息
    1.华侨大学土木工程学院,福建 厦门 361021
    2.华侨大学分析测试中心,福建 厦门 361021

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