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首页> 外文期刊>Chemosphere >Solid/liquid extraction equilibria of phenolic compounds with trioctylphosphine oxide impregnated in polymeric membranes
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Solid/liquid extraction equilibria of phenolic compounds with trioctylphosphine oxide impregnated in polymeric membranes

机译：聚合物膜中浸渍的三辛基氧化膦对酚类化合物的固/液萃取平衡

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摘要

Trioctylphosphine oxide based extractant impregnated membranes (EIM) were used for extraction of phenol and its methyl, hydroxyl and chloride substituted derivatives. The distribution coefficients of the phenols varied from 2 to 234, in the order of 1-napthol > p-chlorophenol > m-cresol > p-cresol > o-cresol > phenol > catechol > pyrogallol > hydroquinone, when initial phenols loadings was varied in 100 -2000 mg/L. An extraction model, based on the law of mass action, was formulated to predict the equilibrium distribution of the phenols. The model was in excellent agreement (R-2 > 0.97) with the experimental results at low phenols concentrations (<800 mg/L). At higher phenols loadings though, Langmuir isotherm was better suited for equilibrium prediction (R-2 > 0.95), which signified high mass transfer resistance in the EIMs. Examination of the effects of ring substitution on equilibrium, and bivariate statistical analysis between the amounts of phenols extracted into the ElMs and factors affecting phenols interaction with TOPO, indicated the dominant role of hydrophobicity in equilibrium determination. These results improve understanding of the solid/liquid equilibrium process between phenols and the ElMs, and these will be useful in designing phenol recovery process from wastewater. (C) 2016 Elsevier Ltd. All rights reserved.
机译：基于三辛基氧化膦的萃取剂浸渍膜（EIM）用于萃取苯酚及其甲基，羟基和氯取代的衍生物。当初始酚含量变化时，苯酚的分配系数从2到234，依次为1-萘酚>对氯苯酚>间甲酚>对甲酚>邻甲酚>苯酚>儿茶酚>邻苯三酚>对苯二酚100 -2000毫克/升。建立了基于质量作用定律的萃取模型，以预测酚的平衡分布。该模型与低酚浓度（<800 mg / L）下的实验结果非常吻合（R-2> 0.97）。在较高的酚含量下，Langmuir等温线更适合于平衡预测（R-2> 0.95），这表明EIM中具有较高的传质阻力。考察了环取代对平衡的影响，以及对提取到ElMs中的酚含量和影响酚与TOPO相互作用的因素之间的双变量统计分析，表明了疏水性在平衡测定中的主导作用。这些结果增进了人们对苯酚和ElMs固/液平衡过程的理解，对于设计废水中的苯酚回收过程非常有用。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Chemosphere》 |2016年第6期|405-413|共9页
  • 作者

    Praveen Prashant; Loh Kai-Chee;

  • 作者单位

    Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore;

    Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore;

  • 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

    Adsorption; Extraction; Hollow fiber membrane; Phenol; Trioctylphosphine oxide;

    机译：吸附;萃取;中空纤维膜;苯酚;三辛基氧化膦;

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