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有机磷阻燃剂在不同含氧碳纳米管上的吸附行为

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严炜, 景传勇. 有机磷阻燃剂在不同含氧碳纳米管上的吸附行为[J]. 环境化学, 2014, 33(10): 1692-1699. doi: 10.7524/j.issn.0254-6108.2014.10.003
引用本文: 严炜, 景传勇. 有机磷阻燃剂在不同含氧碳纳米管上的吸附行为[J]. 环境化学, 2014, 33(10): 1692-1699. doi: 10.7524/j.issn.0254-6108.2014.10.003
shu
YAN Wei, JING Chuanyong. Sorption behavior of organophosphate esters on carbon nanotubes with different surface oxidation[J]. Environmental Chemistry, 2014, 33(10): 1692-1699. doi: 10.7524/j.issn.0254-6108.2014.10.003
Citation: YAN Wei, JING Chuanyong. Sorption behavior of organophosphate esters on carbon nanotubes with different surface oxidation[J]. Environmental Chemistry, 2014, 33(10): 1692-1699. doi: 10.7524/j.issn.0254-6108.2014.10.003
shu

有机磷阻燃剂在不同含氧碳纳米管上的吸附行为

  • 1.

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

  • 基金项目:

    中国科学院生态环境研究中心青年科学基金项目 (RCEES-QN-20130017F)资助.

Sorption behavior of organophosphate esters on carbon nanotubes with different surface oxidation

  • 1.

    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China

  • Fund Project:

  • 摘要: 在对单壁碳纳米管(SWCNT)、多壁碳纳米(MWCNT)及其相应含氧碳管的表征基础上,对OPEs的界面吸附行为进行了考察. 结果表明,碳纳米管对OPEs具有较强的吸附能力(理论最大吸附量可达到412.0 mg·g-1).吸附等温线呈非线性吸附,Freundlich和Langmuir模型均能很好地拟合吸附等温线,校准相关系数分别在0.929—0.999和0.822—0.999范围内.碳纳米管与OPEs间的主要吸附作用机制为疏水相互作用,芳香取代OPEs与碳管管壁间的π-π电子供体受体相互作用对吸附有重要贡献.碳纳米管对OPEs的最大吸附量由碳管比表面积决定,而不受OPEs本身疏水特性的影响.碳管表面氧化引入的含氧基团能通过减弱碳管表面的疏水性和减少表面有效吸附位点来降低碳管对OPEs的吸附容量.
    Abstract: Both organophosphate esters (OPEs) and CNTs inevitably enter environment due to their increasingly wide industrial applications. However, the solid-solution interfacial behaviors, which determine the fate and transport of OPEs in the environment, are unclear. In this manuscript, we studied the interfacial behaviors of OPEs on CNTs. The results showed that the CNTs strongly adsorbed OPEs (the maximum amount of the adsorbed OPEs up to 412.0 mg·g-1). The adsorption isotherms of the six OPEs on CNTs were nonlinear. Freundlich and Langmuir model could fit the isotherms well. The adjust R2 were in the range 0.929—0.999 and 0.822—0.999, respectively. The hydrophobicity of OPEs dominated their affinities on a given CNT and the π-π electron-donor-acceptor (EDA) interaction also played an important role in the sorption of aromatic OPEs. The maximum sorption capacities were dependent on the surface area of CNTs but independent of sorption affinity. Oxygen-containing functional groups on CNTs could interact with water molecules by H-bonding, resulting in weak hydrophobic effect and a decrease in effective sorption sites.
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  • 收稿日期:  2014-05-05
严炜, 景传勇. 有机磷阻燃剂在不同含氧碳纳米管上的吸附行为[J]. 环境化学, 2014, 33(10): 1692-1699. doi: 10.7524/j.issn.0254-6108.2014.10.003
引用本文: 严炜, 景传勇. 有机磷阻燃剂在不同含氧碳纳米管上的吸附行为[J]. 环境化学, 2014, 33(10): 1692-1699. doi: 10.7524/j.issn.0254-6108.2014.10.003
shu
YAN Wei, JING Chuanyong. Sorption behavior of organophosphate esters on carbon nanotubes with different surface oxidation[J]. Environmental Chemistry, 2014, 33(10): 1692-1699. doi: 10.7524/j.issn.0254-6108.2014.10.003
Citation: YAN Wei, JING Chuanyong. Sorption behavior of organophosphate esters on carbon nanotubes with different surface oxidation[J]. Environmental Chemistry, 2014, 33(10): 1692-1699. doi: 10.7524/j.issn.0254-6108.2014.10.003
shu

有机磷阻燃剂在不同含氧碳纳米管上的吸附行为

  • 1. 环境化学与生态毒理学国家重点实验室, 中国科学院生态环境研究中心, 北京, 100085
  • 收稿日期:  2014-05-05
基金项目:

中国科学院生态环境研究中心青年科学基金项目 (RCEES-QN-20130017F)资助.

摘要: 在对单壁碳纳米管(SWCNT)、多壁碳纳米(MWCNT)及其相应含氧碳管的表征基础上,对OPEs的界面吸附行为进行了考察. 结果表明,碳纳米管对OPEs具有较强的吸附能力(理论最大吸附量可达到412.0 mg·g-1).吸附等温线呈非线性吸附,Freundlich和Langmuir模型均能很好地拟合吸附等温线,校准相关系数分别在0.929—0.999和0.822—0.999范围内.碳纳米管与OPEs间的主要吸附作用机制为疏水相互作用,芳香取代OPEs与碳管管壁间的π-π电子供体受体相互作用对吸附有重要贡献.碳纳米管对OPEs的最大吸附量由碳管比表面积决定,而不受OPEs本身疏水特性的影响.碳管表面氧化引入的含氧基团能通过减弱碳管表面的疏水性和减少表面有效吸附位点来降低碳管对OPEs的吸附容量.

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