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首页> 外文期刊>Environmental research >Simultaneous removal of Zn~(2+) and p-nitrophenol from wastewater using nanocomposites of montmorillonite with alkyl-ammonium and complexant
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Simultaneous removal of Zn~(2+) and p-nitrophenol from wastewater using nanocomposites of montmorillonite with alkyl-ammonium and complexant

机译：使用用烷基铵和络合剂的蒙脱石的纳米复合材料同时除去废水中的Zn〜（2+）和p-硝基苯酚

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摘要

Three types of alkyl-ammonium with different branching chains and three complexants with different functional groups were used to prepare alkyl-ammonium or complexant intercalated montmorillonite nanocomposite (A-Mt or C-Mt). In addition, synergistic intercalated montmorillonite nanocomposites (A/C-Mt) with alkyl-ammonium along with complexant were also prepared. The adsorption performance of the various nanocomposites toward Zn~(2+) and p-nitrophenol (PNP) from simulated binary wastewater containing both Zn~(2+) and PNP were systematically investigated. Characterization of Mt nanocomposites showed that both alkyl-ammoniums and complexants were successfully intercalated into the interlayers of Mt. The surfactant loading amounts of the various nanocomposites were also determined and correlated with the resulting expansion of the interlayer spacing. It was found that intercalation of alkane (OTAC) and -SH (CSH) were conducive to the adsorption of Zn~(2+) while -C_2H_4NH (TETA) and all alkyl-ammoniums were beneficial for PNP adsorption. The extent of adsorption was found to be controlled primarily by pH, i.e., the higher pH had a good effect on the adsorption of both Zn~(2+) and PNP. The adsorption process of Zn~(2+) onto Mt nanocomposites was more in line with the Freundlich model (R~2 = 0.99), while the Langmuir model described the adsorption of PNP well (R~2 = 0.99). The adsorption kinetics could be well described by the Elovich equation (R~2 = 0.98) and the double-constant model (R~2 = 0.89). Chemical adsorption was determined to be the dominant process between the contaminant and Mt nanocomposite surfaces.
机译：使用具有不同支链的三种类型的烷基 - 铵和具有不同官能团的三种络合剂，制备烷基 - 铵或络合剂插入蒙脱石纳米复合材料（A-MT或C-MT）。此外，还制备了用烷基铵以及含配络合物的协同嵌入的蒙脱石纳米复合材料（A / C-MT）。系统地研究了来自含有Zn〜（2+）和PNP的模拟二元废水的Zn〜（2+）和对硝基苯酚（PNP）的各种纳米复合材料的吸附性能。 MT纳米复合材料的表征显示，烷基 - 铵和络合剂的成功嵌入到MT的中间层中。还测定了各种纳米复合材料的表面活性剂负载量并与所得的层间间距的膨胀相关。发现烷烃（OTAC）和-SH（CSH）的嵌入有利于Zn〜（2+）的吸附，而-C_2H_4NH（TETA）和所有烷基 - 铵对PNP吸附有益。发现吸附程度主要是通过pH的pH值控制，即，较高的pH对Zn〜（2+）和PNP的吸附有良好的影响。 Zn〜（2+）到Mt纳米复合材料的吸附过程更加符合Freundlich模型（R〜2 = 0.99），而Langmuir模型描述了PNP阱的吸附（R〜2 = 0.99）。通过Elovich方程（R〜2 = 0.98）和双常数模型可以很好地描述吸附动力学（R〜2 = 0.89）。将化学吸附被确定为污染物和MT纳米复合表面之间的主要过程。

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  • 来源
    《Environmental research》 |2021年第10期|111496.1-111496.13|共13页
  • 作者

    Guifang Wang; Huizhen Xiao; Jinliang Zhu; Hongyuan Zhao; Kun Liu; Shaojian Ma; Shuai Zhang; Sridhar Komarneni;

  • 作者单位

    School of Chemistry and Chemical Engineering School of Resources Environment and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials Guangxi University Nanning 530004 China State Key Laboratory of Mineral Processing BGRIMM Technology Group Beijing 100160 China;

    School of Chemistry and Chemical Engineering School of Resources Environment and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials Guangxi University Nanning 530004 China;

    School of Chemistry and Chemical Engineering School of Resources Environment and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials Guangxi University Nanning 530004 China;

    Xinxiang Engineering Technology Research Center for Advanced Materials Preparation and Surface Strengthening Henan Institute of Science and Technology Xinxiang 453003 China;

    School of Chemistry and Chemical Engineering School of Resources Environment and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials Guangxi University Nanning 530004 China;

    School of Chemistry and Chemical Engineering School of Resources Environment and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials Guangxi University Nanning 530004 China;

    Sinosteel Mining Company Limited Sinosteel Corporation Beijing 100080 China;

    Department of Ecosystem Science and Management and Materials Research Institute 204EEL The Pennsylvania State University University Park PA 16802 USA;

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  • 正文语种 eng
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  • 关键词

    Montmorillonite; Nanocomposite; Removal of Zn~(2+); Adsorption of p-nitrophenol;

    机译：蒙脱石;纳米复合材料;去除Zn〜（2+）;对硝基苯酚的吸附;

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