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全氟化合物在碳纳米管上的吸附研究

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周艳萍, 温蓓, 胡晓宇, 张淑贞. 全氟化合物在碳纳米管上的吸附研究[J]. 环境化学, 2011, 30(12): 2003-2008.
引用本文: 周艳萍, 温蓓, 胡晓宇, 张淑贞. 全氟化合物在碳纳米管上的吸附研究[J]. 环境化学, 2011, 30(12): 2003-2008.
shu
ZHOU Yanping, WEN Bei, HU Xiaoyu, ZHANG Shuzhen. ADSORPTION OF PERFLUORINATED COMPOUNDS ON MULTIWALLED CARBON NANOTUBES[J]. Environmental Chemistry, 2011, 30(12): 2003-2008.
Citation: ZHOU Yanping, WEN Bei, HU Xiaoyu, ZHANG Shuzhen. ADSORPTION OF PERFLUORINATED COMPOUNDS ON MULTIWALLED CARBON NANOTUBES[J]. Environmental Chemistry, 2011, 30(12): 2003-2008.
shu

全氟化合物在碳纳米管上的吸附研究

  • 1.

    中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室, 北京, 100085;

  • 2.

    北京疾病预防控制中心, 北京, 100020

  • 基金项目:

    国家重点基础研究发展计划(973)项目(2011CB936001)

    国家自然科学基金项目(20737003)资助.

ADSORPTION OF PERFLUORINATED COMPOUNDS ON MULTIWALLED CARBON NANOTUBES

  • 1.

    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;

  • 2.

    Beijing Center for Disease Prevention and Control, Beijing, 100020, China

  • Fund Project: 国家重点基础研究发展计划(973)项目(2011CB936001) 国家自然科学基金项目(20737003)资助.

  • 摘要: 研究了3种全氟化合物:全氟辛烷磺酸盐 (PFOS)、全氟己烷磺酸盐 (PFHxS)、全氟辛酸(PFOA)在原碳纳米管(Pri-MWCNTs)和氧化型碳纳米管(O-MWCNTs)上的吸附行为.研究结果显示,3种全氟化合物在两种碳管上的吸附均呈明显的非线性;全氟化合物的等温吸附曲线均符合Freundlich 及Langmuir模型.模型拟合参数表明全氟化合物在原碳纳米管上的吸附量大于在氧化型碳纳米管上的吸附量.3种全氟化合物的吸附能力为PFOS > PFOA > PFHxS, 这与它们分子含CF2个数一致,说明亲脂性是全氟化合物在碳纳米管上吸附的重要机理之一.3种全氟化合物的吸附量随pH的增加而降低,表明吸附受静电作用的影响.当溶液中同时存在PFOS与PFOA时,二者的吸附都有所降低,说明二者在碳纳米管上有共同的吸附位点,吸附存在竞争关系.
    Abstract: In this study, sorption isotherms of three kinds of perfluorinated compounds (PFCs), perfluorooctanoic acid (PFOA), perfluorooctanesulfonic potassium (PFOS), and perfluorohexanesulfonic potassium (PFHxS) on multiwalled carbon nanotubes (MWCNTs) were studied. The sorption isotherms were nonlinear and fitted with Freundlich and Langmuir models well. Sorption of PFCs on pristine MWCNTs was higher than those on oxidized MWCNTs. Sorption coefficients (Kd) of three PFCs followed the order: PFHxS Kd values of PFOA and PFOS in the bi-solute system were lower than those in the single-solute system. PFOA had a higher reduction than PFOS.
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    [3] Becker A M, Gerstmann S, Frank H. Perfluorooctane surfactants in waste waters, the major source of river pollution[J]. Chemosphere, 2008, 72 (1): 115-121
    [4] Senevirathna S, Tanaka S, Fujii S, et al. A comparative study of adsorption of perfluorooctane sulfonate (PFOS) onto granular activated carbon, ion-exchange polymers and non-ion-exchange polymers[J]. Chemosphere, 2010, 80 (6): 647-651
    [5] Yu Q, Zhang R, Deng S, et al. Sorption of perfluorooctane sulfonate and perfluorooctanoate on activated carbons and resin: Kinetic and isotherm study[J]. Water Research, 2009, 43 (4): 1150-1158
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  • 收稿日期:  2011-05-13
周艳萍, 温蓓, 胡晓宇, 张淑贞. 全氟化合物在碳纳米管上的吸附研究[J]. 环境化学, 2011, 30(12): 2003-2008.
引用本文: 周艳萍, 温蓓, 胡晓宇, 张淑贞. 全氟化合物在碳纳米管上的吸附研究[J]. 环境化学, 2011, 30(12): 2003-2008.
shu
ZHOU Yanping, WEN Bei, HU Xiaoyu, ZHANG Shuzhen. ADSORPTION OF PERFLUORINATED COMPOUNDS ON MULTIWALLED CARBON NANOTUBES[J]. Environmental Chemistry, 2011, 30(12): 2003-2008.
Citation: ZHOU Yanping, WEN Bei, HU Xiaoyu, ZHANG Shuzhen. ADSORPTION OF PERFLUORINATED COMPOUNDS ON MULTIWALLED CARBON NANOTUBES[J]. Environmental Chemistry, 2011, 30(12): 2003-2008.
shu

全氟化合物在碳纳米管上的吸附研究

  • 1.  中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室, 北京, 100085;
  • 2.  北京疾病预防控制中心, 北京, 100020
  • 收稿日期:  2011-05-13
基金项目:

国家重点基础研究发展计划(973)项目(2011CB936001)

国家自然科学基金项目(20737003)资助.

摘要: 研究了3种全氟化合物:全氟辛烷磺酸盐 (PFOS)、全氟己烷磺酸盐 (PFHxS)、全氟辛酸(PFOA)在原碳纳米管(Pri-MWCNTs)和氧化型碳纳米管(O-MWCNTs)上的吸附行为.研究结果显示,3种全氟化合物在两种碳管上的吸附均呈明显的非线性;全氟化合物的等温吸附曲线均符合Freundlich 及Langmuir模型.模型拟合参数表明全氟化合物在原碳纳米管上的吸附量大于在氧化型碳纳米管上的吸附量.3种全氟化合物的吸附能力为PFOS > PFOA > PFHxS, 这与它们分子含CF2个数一致,说明亲脂性是全氟化合物在碳纳米管上吸附的重要机理之一.3种全氟化合物的吸附量随pH的增加而降低,表明吸附受静电作用的影响.当溶液中同时存在PFOS与PFOA时,二者的吸附都有所降低,说明二者在碳纳米管上有共同的吸附位点,吸附存在竞争关系.

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