...
首页> 外文期刊>Journal of Environmental Science and Health >Retention of selected steroids on a silt-loam soil
【24h】

Retention of selected steroids on a silt-loam soil

机译:在粉质壤土上保留某些类固醇

获取原文
获取原文并翻译 | 示例
           

摘要

This study used batch-equilibrium techniques to evaluate the soil sorption and desorption of target steroids, representative of the estrogen, androgen, progestogen and corticosteroid families. The sorption kinetics exhibited an immediate rapid sorption followed by a slow process with a duration dependent on soil particle size. Adsorption and desorption isotherms could be described by the Freundlich equation, in a non-linear form (1 < 1). High organic carbon-water partitioning coefficient (K_(oc)) values indicate that a large mass fraction of the hormones will be associated with the sorbed phase. As a result of the poor linear correlation between log K_(oc) and log K_(ow) (octanol-water partition coefficient), it could be assumed that both hydrophobic and hydrogen bonding interactions contribute to the sorption mechanisms of the selected steroids. A hysteresis phenomenon was observed, varying with particle size, indicating strong irreversible interactions between some steroids and soil.
机译:这项研究使用间歇平衡技术评估目标类固醇在土壤中的吸附和解吸,这些类固醇代表雌激素,雄激素,孕激素和皮质类固醇家族。吸附动力学表现出立即的快速吸附,随后是缓慢的过程,其持续时间取决于土壤颗粒大小。吸附和解吸等温线可以通过Freundlich方程以非线性形式(1 / n <1)描述。高的有机碳-水分配系数(K_(oc))值表明,激素的大部分与吸附相有关。由于log K_(oc)和log K_(ow)(辛醇-水分配系数)之间的线性相关性较差,因此可以假定疏水键和氢键相互作用都对所选类固醇的吸附机理有贡献。观察到一个磁滞现象,随颗粒大小而变化,表明某些类固醇与土壤之间存在不可逆的强烈相互作用。

著录项

  • 来源
    《Journal of Environmental Science and Health》 |2012年第13期|p.2133-2140|共8页
  • 作者单位

    Universite Lyon, Institut des Sciences Analytiques, Departement Service Central d'Analyse, CNRS, Equipe TRACES, Villeurbanne, France;

    Universite Lyon, Institut des Sciences Analytiques, Departement Service Central d'Analyse, CNRS, Equipe TRACES, Villeurbanne, France;

    Universite Lyon, Institut des Sciences Analytiques, Departement Service Central d'Analyse, CNRS, Equipe TRACES, Villeurbanne, France;

    Universite Lyon, Institut des Sciences Analytiques, UMR5280 CNRS, Equipe TRACES, 5 rue de la Doua, 69100 Villeurbanne, France;

  • 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
  • 关键词

    steroids; adsorption; desorption; soil;

    机译:类固醇吸附解吸泥;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号