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首页> 外文期刊>RSC Advances >Novel Al2O3/GO/halloysite nanotube composite for sequestration of anionic and cationic dyes
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Novel Al2O3/GO/halloysite nanotube composite for sequestration of anionic and cationic dyes

机译：新型Al2O3 / Go / Lolloysite Nanotube复合材料，用于封存阴离子和阳离子染料

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摘要

In this study, an Al2O3/graphene oxide/halloysite nanotube (Al2O3/GO/HNT) nanocomposite has been synthesized and used as an adsorbent for the sequestration of cationic methylene blue (MB) and anionic congo red (CR) dyes from wastewater. The properties of the synthesized Al2O3/GO/HNT were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Various factors such as pH, contact time, initial concentration and temperature have been investigated for evaluation of the optimum adsorption in the batch sorption experiment and experimental results showed the highest adsorption capacity was found to be 329.8 mg g(-1) for CR and 258.4 mg g(-1) for MB at an initial concentration of 500 mg l(-1) which was three times higher than the individual Al2O3 GO and HNT concentrations. Freundlich and Langmuir adsorption isotherm models were fitted to the experimental data and the results implied that the adsorption of MB well described with Langmuir and CR is related to the Freundlich isotherm model. The kinetics data of CR and MB adsorption was well fitted to pseudo-first-order. The calculated values for thermodynamic parameters indicated that the MB and CR adsorption process were spontaneous and exothermic in nature. The effectiveness of the Al2O3/GO/HNT composite was also tested for adsorption of Cu(II), oxytetracycline (OTC) antibiotic, and 2-chlorophenol (2CP) and the results revealed that the Al2O3/GO/HNT composite is a promising adsorbent for the dyes as well as heavy metals and other organic pollutants.
机译：在该研究中，已合成了Al 2 O 3 /石墨烯氧化物/霍罗伊镁纳米纳米（Al 2 O 3 / Go / HNT）纳米复合材料，用作来自废水的阳离子亚甲基蓝（MB）和阴离子刚果红色（Cr）染料的螯合剂的吸附剂。合成的Al 2 O 3 / Go / HNT的性质是通过X射线衍射（XRD），X射线光电子能谱（XPS），扫描电子显微镜（SEM）和透射电子显微镜（TEM）的特征。已经研究了PH，接触时间，初始浓度和温度等各种因素，以评估分批吸附试验中的最佳吸附和实验结果，显示出最高的吸附能力为CR和258.4的329.8mg g（-1） MB的Mg G（-1）在初始浓度为500mg L（-1）的Mb，其比单个Al2O3 Go和HNT浓度高三倍。 Freundlich和Langmuir吸附等温线型号适用于实验数据，结果暗示了Langmuir和Cr良好描述的Mb孔的吸附与Freundlich等温模型有关。 CR和MB吸附的动力学数据适合于伪第一顺序。热力学参数的计算值表明MB和Cr吸附过程本质上是自发性和放热的。还测试了Al2O3 / Go / HNT复合材料的有效性，用于吸附Cu（II），氧化胞菌素（OTC）抗生素和2-氯苯酚（2CP），结果表明，Al2O3 / Go / HNT复合材料是一个有前途的吸附剂对于染料以及重金属和其他有机污染物。

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  • 来源
    《RSC Advances》 |2019年第24期|共11页
  • 作者

    Barakat M. A.; Kumar Rajeev; Balkhyour M.; Abu Taleb Md;

  • 作者单位

    King Abdulaziz Univ Fac Meteorol Environm &

    Arid Land Agr Dept Environm Sci Jeddah 21589 Saudi Arabia;

    King Abdulaziz Univ Fac Meteorol Environm &

    Arid Land Agr Dept Environm Sci Jeddah 21589 Saudi Arabia;

    King Abdulaziz Univ Fac Meteorol Environm &

    Arid Land Agr Dept Environm Sci Jeddah 21589 Saudi Arabia;

    King Abdulaziz Univ Fac Meteorol Environm &

    Arid Land Agr Dept Environm Sci Jeddah 21589 Saudi Arabia;

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  • 正文语种 eng
  • 中图分类 化学;
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