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首页> 外文期刊>Science of advanced materials >Polyethylene-Modified Activated Carbon Nanocomposite for Removal of Methylene Blue from Aqueous Solutions: Characteristic, Kinetic and Thermodynamic Studies
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Polyethylene-Modified Activated Carbon Nanocomposite for Removal of Methylene Blue from Aqueous Solutions: Characteristic, Kinetic and Thermodynamic Studies

机译：聚乙烯改性的活性炭纳米复合材料从水溶液中去除亚甲基蓝的特性，动力学和热力学研究

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摘要

In this study, a polyethylene-modified activated carbon (PE-AC) nanocomposite was fabricated by the hot pressing technique. The adsorption properties of the PE-AC nanocomposite were examined against methylene blue (MB) as the target adsorbate. Under optimal conditions (AC to polyethylene weight ratio:3:1; sintering temperature; 150 degrees C; sintering time:30 min. Under these conditions, the BET surface area and average pore size of PE-AC nanocomposite were measured as 527.754 m(2) g(-1) and 2.24 nm, respectively. The adsorption of MB on the PE-AC nanocomposite was studied using the batch technique, and the effects of initial dye concentration, reaction temperature and time were analyzed. The results showed that the adsorption process achieved equilibrium within 240 min and the adsorption capacity of PE-AC nanocomposite for MB was 44.42 mg g(-1). Kinetic data, equilibrium isotherms and thermodynamic parameters were evaluated to fully understand the nature of the adsorption. The adsorption kinetic data can be better described by a pseudo-second-order model and the Freundlich model allowed the best fit between experimental and simulated data. The calculation values of thermodynamic parameters indicated that the adsorption phenomenon was spontaneous and endothermic, with reaction enthalpy (Delta H-theta) and entropy (Delta S-theta) determined as 10.875 kJ/mol and 0.0515 kJ/(mol.), respectively.
机译：在这项研究中，通过热压技术制备了聚乙烯改性的活性炭（PE-AC）纳米复合材料。针对作为目标被吸附物的亚甲基蓝（MB），检查了PE-AC纳米复合材料的吸附性能。在最佳条件下（AC与聚乙烯的重量比：3：1；烧结温度； 150摄氏度；烧结时间：30分钟）。在这些条件下，PE-AC纳米复合材料的BET表面积和平均孔径为527.754 m（ 2）分别在g（-1）和2.24 nm处，采用间歇技术研究MB在PE-AC纳米复合材料上的吸附，并分析了初始染料浓度，反应温度和时间的影响。吸附过程在240分钟内达到平衡，PE-AC纳米复合材料对MB的吸附容量为44.42 mg g（-1），并对其动力学数据，平衡等温线和热力学参数进行了评估，以充分理解吸附的性质。可以用伪二阶模型更好地描述，Freundlich模型可以使实验数据和模拟数据达到最佳拟合；热力学参数的计算值表明，吸附酚术语是自发的和吸热的，反应焓（ΔH-θ）和熵（ΔS-θ）分别确定为10.875 kJ / mol和0.0515 kJ /（mol。）。

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  • 来源
    《Science of advanced materials》 |2017年第5期|719-726|共8页
  • 作者

    Wang Wenxia; He Qi; He Tinglin; Xiao Kaijun; Zhu Liang;

  • 作者单位

    South China Univ Technol, Sch Food Sci & Technol, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Sch Food Sci & Technol, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Sch Food Sci & Technol, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Sch Food Sci & Technol, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Sch Food Sci & Technol, Guangzhou 510640, Guangdong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Polyethylene; Powdered Activate Carbon; Methylene Blue; Kinetic Study; Thermodynamic Parameters;

    机译：聚乙烯;粉末活性炭;亚甲基蓝;动力学研究;热力学参数;

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