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首页> 外文期刊>Environmental Science & Technology >Sorptive Capacities of Nonpolymeric Plant Lipids for Hydrophobic Chemicals Determined by Passive Dosing
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Sorptive Capacities of Nonpolymeric Plant Lipids for Hydrophobic Chemicals Determined by Passive Dosing

机译：被动加料法测定非聚合植物脂质对疏水化学物质的吸附能力

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摘要

Vegetation plays an important role in the partitioning, transport, and fate of semivolatile hydrophobic organic chemicals (HOCs) in the environment. Leaf/air partition ratios (K-leaf/air) of HOCs are highly variable for different plant species. The differences cannot be fully explained by the fraction of lipids in the leaves or the thickness of the cuticle. Our goal was to elucidate the importance of non polymeric lipids in determining K-leaf/air To do this, we extracted organic matter from 7 plant species using solvents that do not extract the polymeric lipids cutin and cutan, to yield extractable organic matter (EOM). We used passive dosing to determine the partition ratios of selected HOCs between the EOM of the leaves and our reference lipid, olive oil (K-EOM/olive oil)" In addition, we measured analogous partition ratios for three lipid standards. Proton nuclear magnetic resonance (NMR) spectroscopy was used to characterize the composition of lipids. Differences in K-EOM/olive oil of two polychlorinated biphenyls and four chlorinated benzenes were below a factor of 2 in the plant species studied, indicating that the reported differences in K-leaf/air are not caused by differences in the sorptive capacities of nonpolymeric lipids or that our EOM is not representative of all nonpolymeric leaf lipids.
机译：植被在环境中半挥发性疏水有机化学物质（HOC）的分配，运输和命运中起着重要作用。 HOC的叶/空气分配比（K-叶/空气）对于不同植物物种具有很大的可变性。差异不能完全由叶子中脂质的比例或表皮的厚度来解释。我们的目标是阐明非聚合脂质在确定K叶/空气中的重要性。为此，我们使用不提取聚合脂质角质和角质的溶剂从7种植物中提取了有机物，以产生可提取的有机物（EOM ）。我们使用被动加料来确定叶子的EOM与参考脂质，橄榄油（K-EOM /橄榄油）之间的选定HOC分配比例。“此外，我们还测量了三种脂质标准品的类似分配比例。质子核核磁共振（NMR）光谱用于表征脂质的组成，在所研究的植物物种中，两种多氯联苯和四种氯苯的K-EOM /橄榄油差异小于2。 -叶/空气不是由非聚合脂质的吸附能力差异引起的，或者不是由我们的EOM不能代表所有非聚合脂质的。

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  • 来源
    《Environmental Science & Technology》 |2019年第3期|1278-1286|共9页
  • 作者

    Bolinius Damien Johann; MacLeod Matthew; Iadaresta Francesco; Holmback Jan; Jahnke Annika;

  • 作者单位

    Stockholm Univ, Dept Environm Sci & Analyt Chem ACES, Svante Arrhenius Vag 8, SE-11418 Stockholm, Sweden|Stockholm Univ, Balt Sea Ctr, SE-11418 Stockholm, Sweden;

    Stockholm Univ, Dept Environm Sci & Analyt Chem ACES, Svante Arrhenius Vag 8, SE-11418 Stockholm, Sweden;

    Stockholm Univ, Dept Environm Sci & Analyt Chem ACES, Svante Arrhenius Vag 8, SE-11418 Stockholm, Sweden;

    Stockholm Univ, Dept Environm Sci & Analyt Chem ACES, Svante Arrhenius Vag 8, SE-11418 Stockholm, Sweden|Karolinska Inst, Lipidor AB, Sci Pk,Fogdevreten 2, SE-17165 Solna, Sweden;

    UFZ Helmholtz Ctr Environm Res, Dept Cell Toxicol, Permoserstr 15, DE-04318 Leipzig, Germany;

  • 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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