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首页> 外文期刊>Environmental Science & Technology: ES&T >Trichloroethylene Adsorption by Fibrous and Granular Activated Carbons:Aqueous Phase,Gas Phase,and Water vapor Adsorption Studies
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Trichloroethylene Adsorption by Fibrous and Granular Activated Carbons:Aqueous Phase,Gas Phase,and Water vapor Adsorption Studies

机译：纤维和颗粒活性炭对三氯乙烯的吸附：水相、气相和水蒸气吸附研究

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摘要

The important adsorption components involved in the removal of trichloroethylene(TCE)by fibrous and granular activated carbons from aqueous solutions were systematically examined.Namely,adsorption of TCE itself(i.e.,TCE vapor isotherms),water molecules(i.e.,water vapor isotherms),and TCE in water(i.e.,TCE aqueous phase isotherms)were studied,side-by-side,using 20 well-characterized surface-modified activated carbons.The results showed that TCE molecular size and geometry,activated carbon surface hydrophilicity,pore volume,and pore size distribution in micropores control adsorption of TCE at relatively dilute aqueous solutions.TCE adsorption increased as the carbon surface hydrophilicity decreased and the pore volume in micropores of less than 10 A,especially in the 5-8 A range,increased.TCE molecules appeared to access deep regions of carbon micropores due to their flat geometry.The results indicated that characteristics of both adsorbate(i.e.,the molecular structure,size,and geometry)and activated carbon(surface hydrophilicity,pore volume,and pore size distribution of micropores)control adsorption of synthetic organic compounds from water and wastewaters.The important micropore size region for a target compound adsorption depends on its size and geometry.
机译：系统研究了纤维状和颗粒状活性炭从水溶液中去除三氯乙烯（TCE）的重要吸附组分。即，使用20种表征良好的表面改性活性炭，并排研究了TCE本身（即TCE蒸气等温线）、水分子（即水蒸气等温线）和TCE在水中（即TCE水相等温线）的吸附。结果表明，在相对稀的水溶液下，TCE分子大小和几何形状、活性炭表面亲水性、孔体积和孔径分布控制了TCE的吸附。随着碳表面亲水性的降低和小于10 A的微孔孔隙体积的增加，TCE吸附量增加，特别是在5-8 A范围内。由于其平坦的几何形状，TCE分子似乎可以进入碳微孔的深层区域。结果表明，吸附物（分子结构、尺寸和几何形状）和活性炭（表面亲水性、孔体积和微孔孔径分布）的特性控制了水和废水中合成有机化合物的吸附。目标化合物吸附的重要微孔尺寸区域取决于其尺寸和几何形状。

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  • 来源
    《Environmental Science & Technology: ES&T》 |2004年第22期|5834-5841|共8页
  • 作者

    Taniu Karanfil; Seyed A.Dastgheib;

  • 作者单位

    Department of Environmental Engineering and Science,Clemson University,342 Computer Court,Anderson,South Carolina 29625;

  • 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 英语
  • 中图分类 环境化学;
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