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首页> 外文期刊>Environmental Science & Technology >Membrane-Water Partition Coefficients to Aid Risk Assessment of Perfluoroalkyl Anions and Alkyl Sulfates
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Membrane-Water Partition Coefficients to Aid Risk Assessment of Perfluoroalkyl Anions and Alkyl Sulfates

机译:膜-水分配系数对全氟烷基阴离子和烷基硫酸盐的风险评估

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摘要

This study determined the sorption affinity to artificial phospholipid membranes (K-MW) for series of perfluorinated carboxylates (PFCAs), perfluorinated sulfonates (PFSAs), alkyl sulfates (CxSO4), and 1-alkanesulfonates (CxSO3). A sorbent dilution assay with solid supported lipid membranes (SSLM) showed consistent CF2 unit increments of 0.59, and CH2 unit increments of 0.53, for the log K-MW of perfluorinated and hydrogenated anions, respectively. PFSAs sorbed 0.90 log units stronger than analogue PFCAs; CxSO4 sorbed 0.75 log units stronger than analogue CxSO3 anions. The log K-MW values for the octyl analogues increase in the order H(CH2)(8)SO3- (1.74) H(CH2)(8)SO4- (2.58) F(CF2)(8)CO2- (PFNA, 4.04) F(CF2)(8)SO3- (PFOS, 4.88). Intrinsic partition ratios determined on a phospholipid coated HPLC column (IAM-HPLC) closely aligned with SSLM K-MW values. COSMO-RS based molecular calculations of K-MW aligned with SSLM K-MW values for hydrogenated anions with C-8-C-14 alkyl chains but strongly underestimated CF2 and CH2 unit increments for C-4-C-8 based anions. Dividing the critical narcotic membrane burden of 100 mmol/kg by the experimental K-MW predicts lethal baseline toxicity concentrations (LC50,narc). The LC50,narc coincides with the lowest reported acute LC50 values for several anionic surfactants but were on average about an order of magnitude lower.
机译:这项研究确定了一系列全氟化羧酸盐(PFCA),全氟化磺酸盐(PFSA),烷基硫酸盐(CxSO4)和1-链烷磺酸盐(CxSO3)对人造磷脂膜(K-MW)的吸附亲和力。用固体负载脂质膜(SSLM)进行的吸附剂稀释分析表明,全氟化阴离子和氢化阴离子的log K-MW分别一致,CF2单位增量为0.59,CH2单位增量为0.53。 PFSA的吸附量比模拟PFCA强0.90 log单位; CxSO4吸附比类似的CxSO3阴离子强0.75 log单位。辛基类似物的log K-MW值按H(CH2)(8)SO3-(1.74)

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  • 来源
    《Environmental Science & Technology》 |2019年第2期|760-770|共11页
  • 作者

    Droge Steven T. J.;

  • 作者单位

    UvA, IBED, Dept Freshwater & Marine Ecol FAME, Sci Pk 904, NL-1098XH Amsterdam, Netherlands;

  • 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
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