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首页> 外文期刊>Frontiers of environmental science & eng >One-pot preparation of graphene oxide magnetic nanocomposites for the removal of tetrabromobisphenol A
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One-pot preparation of graphene oxide magnetic nanocomposites for the removal of tetrabromobisphenol A

机译：一锅法制备氧化石墨烯磁性纳米复合材料以去除四溴双酚A

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摘要

A simple solvothermal method was used to prepare monodisperse magnetite (Fe_3O_4) nanoparticles attached onto graphene oxide (GO) sheets as adsorbents to remove tetrabromobisphenol A (TBBPA) from an aqueous solution. These Fe_3O_4/GO (MGO) nanocomposites were characterized by transmission electron microscopy. The adsorption capacity at different initial pH, contact duration, and temperature were evaluated. The kinetics of adsorption was found to fit the pseudo-second-order model perfectly. The adsorption isotherm well fitted the Langmuir model, and the theoretical maximum of adsorption capacity calculated by the Langmuir model was 27.26 mg·g~(-1). The adsorption thermodynamics of TBBPA on the MGO nanocomposites was determined at 303 K, 313 K, and 323 K, respectively. The results indicated that the adsorption was spontaneous and endothermic. The MGO nanocomposites were conveniently separated from the media by an external magnetic field within several seconds, and then regenerated in 0.2 M NaOH solution. Thus, the MGO nanocomposites are a promising candidate for TBBPA removal from wastewater.
机译：一种简单的溶剂热方法用于制备附着在氧化石墨烯（GO）板上作为吸附剂的单分散磁铁矿（Fe_3O_4）纳米颗粒，以从水溶液中去除四溴双酚A（TBBPA）。这些Fe_3O_4 / GO（MGO）纳米复合材料的特征是通过透射电子显微镜。评估了在不同初始pH，接触持续时间和温度下的吸附能力。发现吸附动力学完全符合拟二级模型。吸附等温线很好地拟合了Langmuir模型，由Langmuir模型计算出的理论吸附容量的最大值为27.26 mg·g〜（-1）。在MGO纳米复合材料上，TBBPA的吸附热力学分别确定为303 K，313 K和323K。结果表明，吸附是自发的并且是吸热的。 MGO纳米复合材料可在几秒钟内通过外部磁场方便地从介质中分离出来，然后在0.2 M NaOH溶液中再生。因此，MGO纳米复合材料是从废水中去除TBBPA的有希望的候选者。

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  • 来源
    《Frontiers of environmental science & eng》 |2013年第3期|442-450|共9页
  • 作者

    Liqin Ji; Xue Bai; Lincheng Zhou; Hanchang Shi; Wei Chen; Zulin Hua;

  • 作者单位

    School of Environment, Tsinghua University, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing 100084, China ,State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, China;

    School of Environment, Tsinghua University, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing 100084, China ,College of Environmental Science and Engineering, Hohai University, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake (Ministry of Education), Nanjing 210098, China;

    State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, China;

    School of Environment, Tsinghua University, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing 100084, China;

    College of Environmental Science and Engineering, Hohai University, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake (Ministry of Education), Nanjing 210098, China;

    College of Environmental Science and Engineering, Hohai University, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake (Ministry of Education), Nanjing 210098, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Magnetic; graphene oxide (GO); adsorption; tetrabromobisphenol A (TBBPA);

    机译：磁性;氧化石墨烯（GO）;吸附四溴双酚A（TBBPA）;

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