沉水植物对短链全(多)氟烷基化合物的生物富集

雷嘉敏, 李冬, 李静, 胡格, 孔子卓, 智悦, 李伟, 钱深华

中国环境科学 ›› 2025, Vol. 45 ›› Issue (7) : 3905-3915.

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (7) : 3905-3915.
环境生态

沉水植物对短链全(多)氟烷基化合物的生物富集

  • 雷嘉敏1, 李冬2, 李静3, 胡格1, 孔子卓1, 智悦1, 李伟1, 钱深华1
作者信息 +

Bioaccumulation of short-chain per- and polyfluoroalkyl substances in submerged macrophytes

  • LEI Jia-min1, LI Dong2, LI Jing3, HU Ge1, KONG Zi-Zhuo1, ZHI Yue1, LI Wei1, QIAN Shen-hua1
Author information +
文章历史 +

摘要

通过开展分区控制暴露实验,研究典型沉水植物长叶九冠(Aquarius uruguayensis)对污染水体中广泛检出的新兴短链全(多)氟烷基化合物(PFAS)的富集及转运特征,目标污染物包括6种短链PFAS (3种全氟烷基羧酸物质PFCAs和3种全氟醚基物质PFEAs).结果表明:长叶九冠对水中6种短链PFAS均有生物富集,其整株生物积累因子(BCFtotal)介于3.0~46.0L/kg,并主要在叶片中检出,叶片平均BCFshoot为2.5~62.2L/kg;除了根茎,长叶九冠的叶片也被证实可单独富集PFAS,并且叶片积累PFAS的能力强于根茎;长叶九冠优先富集亲水小分子PFAS,并且植物BCF与logKow和分子质量显著负相关(ρ1=-0.62,ρ2=-0.81,P<0.05),其BCF随着logKow和分子质量的增大而降低;短链PFAS在植物体内发生转运,根茎向叶片转运的贡献度高,叶片向根茎的转运途径贡献度低.

Abstract

This study investigated the accumulation and translocation characteristics of emerging short-chain per- and polyfluoroalkyl substances (PFAS) in a typical submerged macrophyte Aquarius uruguayensis through controlled exposure experiments. The target pollutants included six short-chain PFAS (three perfluoroalkyl carboxylic acids (PFCAs) and three perfluoroether acids (PFEAs)). A. uruguayensis demonstrated bioaccumulation capability of all six short-chain PFAS from water, with whole-plant bioconcentration factors (BCFtotal) ranging from 3.0 to 46.0L/kg, primarily detected in leaves with average shoot bioconcentration factors (BCFshoot) of 2.5~62.2L/kg; In addition to roots and stems, A. uruguayensis leaves were also proven capable of accumulating PFASs independently, with stronger absorption capacity than roots and stems; A. uruguayensis showed selective accumulation of the six short-chain PFAS, preferentially concentrating hydrophilic small-molecule PFASs, with plant BCF showing significant negative correlations with logKow and molecular mass(ρ1= -0.62,ρ2= -0.81, P<0.05), and its BCF decreases with the increase of logKow and molecular mass; Short-chain PFAS underwent translocation within the plant, with a high contribution from roots to leaves, and a low contribution from leaves to roots.

关键词

沉水植物 / 短链 / 分区控制暴露实验 / 富集 / 全氟醚基 / 全氟羧酸 / 转运

Key words

bioaccumulation / controlled exposure experiments / PFCAs / PFEAs / short chain / submerged plants / translocation

引用本文

导出引用
雷嘉敏, 李冬, 李静, 胡格, 孔子卓, 智悦, 李伟, 钱深华. 沉水植物对短链全(多)氟烷基化合物的生物富集[J]. 中国环境科学. 2025, 45(7): 3905-3915
LEI Jia-min, LI Dong, LI Jing, HU Ge, KONG Zi-Zhuo, ZHI Yue, LI Wei, QIAN Shen-hua. Bioaccumulation of short-chain per- and polyfluoroalkyl substances in submerged macrophytes[J]. China Environmental Science. 2025, 45(7): 3905-3915
中图分类号: X173   

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基金

重庆市自然科学基金(CSTB2022NSCQ-MSX0337);重庆市技术创新与应用发展专项重点项目(CSTB2023TIAD-KPX0092);重庆市研究生科研创新项目(CYS23125)

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