...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemosphere >Study on the sorption behaviors of Tween-80 on marine sediments
【24h】

Study on the sorption behaviors of Tween-80 on marine sediments

机译：Tween-80在海洋沉积物上的吸附行为研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Batch experiment was carried out to study the sorption behavior of polysorbate 80 (Tween-80) on marine sediments collected from three different sites in Bohai Sea, China. The sorption of Tween-80 reached equilibrium within 3 h and the sorption kinetic curve could be divided into two sections: the rapid sorption part and the slow sorption part. The initial sorption rate increased with the organic carbon (OC) content of the sediment. For the sediments treated by HC1 and H_2O, sorption behaviors of Tween-80 fit the linear model very well (R~2: 0.9516-0.9862) at 298 K. The sorption occurred primarily due to partition function of the hydrophobic chains of Tween-80 into the organic carbon of the sediments. Sorption of Tween-80 on H_2O_2-treated sediments followed the Freundlich model (R~2: 0.9565-0.9732), which indicated that the surface function of clay minerals and other inorganic solids in the sediment played a key role. Moreover, the dependence of sorption on salinity and temperature was examined and the ther-modynamic parameters were evaluated. It was found that the sorption was favorably influenced by the increasing salinity and decreasing temperature of seawater. The changes of Gibbs free energy (ΔG~θ = -15.33 ～ -17.54 kJ mol~(-1)), enthalpy (ΔH~θ= -62.23 kJ mol~(-1)) and entropy (ΔS~θ = -151.68 J mol~(-1) K~(-1)) of the sorption were also determined. The negative ΔG~θ and ΔH~θ values indicated that the sorption process was spontaneous and exothermic. The negative ΔS~θ value suggested that the degree of freedom decreased during the sorption process.
机译：批处理实验研究了聚山梨酯80（Tween-80）在从中国渤海三个不同地点收集的海洋沉积物上的吸附行为。 Tween-80的吸附在3 h内达到平衡，吸附动力学曲线可分为快速吸附部分和缓慢吸附部分两部分。初始吸附速率随沉积物中有机碳（OC）含量的增加而增加。对于用HC1和H_2O处理的沉积物，Tween-80在298 K时的吸附行为非常符合线性模型（R〜2：0.9516-0.9862）。吸附的发生主要是由于Tween-80的疏水链的分配功能进入沉积物的有机碳中。 Tween-80在H_2O_2处理的沉积物上的吸附遵循Freundlich模型（R〜2：0.9565-0.9732），这表明粘土矿物和其他无机固体在沉积物中的表面功能起着关键作用。此外，检查了吸附对盐度和温度的依赖性，并评估了热力学参数。发现吸附受海水盐度增加和温度降低的有利影响。吉布斯自由能（ΔG〜θ= -15.33〜-17.54 kJ mol〜（-1）），焓（ΔH〜θ= -62.23 kJ mol〜（-1））和熵的变化（ΔS〜θ= -151.68）还测定了J mol〜（-1）K〜（-1））。负ΔG〜θ和ΔH〜θ值表明吸附过程是自发的且放热的。 ΔS〜θ值为负表明吸附过程中自由度降低。

著录项

  • 来源
    《Chemosphere》 |2010年第11期|P.1019-1025|共7页
  • 作者

    Gui-Peng Yang; Qiang Chen; Xin-Xin Li; Xiao-Yan Cao;

  • 作者单位

    Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;

    Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;

    Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;

    Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    tween-80; nonionic surfactant; seawater; sediment; sorption isotherm;

    机译：吐温80;非离子表面活性剂海水;沉淀;吸附等温线;

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