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Kinetics and thermodynamics studies for bisphenol S adsorption on reduced graphene oxide

机译：双酚S吸附在氧化石墨烯的双酚吸附的动力学和热力学研究

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摘要

The adsorption behavior of bisphenol S (BPS) on reduced graphene oxide (rGO) was investigated. The adsorption kinetics data are best described with a pseudo-second-order model and the equilibrium data are well fitted by both Freundlich and Langmuir models. The maximum adsorption capacity of BPS on rGO at pH 6.0 and T = 298 K was 261.74 mg g(-1). It was found that the increase of solution pH was unfavorable for BPS adsorption due to the increasing electrostatic repulsion between BPS and rGO. The thermodynamics data indicated that the adsorption of BPS on rGO was a spontaneous and exothermic process. Fourier transform infrared (FTIR) spectra suggested that BPS adsorption on rGO was primarily driven by p-p interaction between the graphene's hexagonal arrays and the aromatic core of BPS. Results from this study demonstrate that rGO is a promising adsorbent for BPS removal in water treatment.
机译：研究了研究了双酚S（BPS）对氧化石油（RGO）的吸附行为。 吸附动力学数据最好用伪二阶模型描述，均衡数据均由Freundlich和Langmuir模型齐全。 在pH6.0和T = 298k下Rgo上的BPS的最大吸附能力为261.74mg（-1）。 发现由于BPS和RGO之间的静电排斥力增加，溶液pH的增加对于BPS吸附是不利的。 热力学数据表明，BPS在RGO上的吸附是自发性和放热过程。 傅里叶变换红外（FTIR）光谱表明，RGO上的BPS吸附主要是由石墨烯的六边形阵列和BPS的芳香核之间的P-P相互作用驱动。 本研究结果表明，RGO是对水处理中的BPS去除的有希望的吸附剂。

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  • 来源
    《RSC Advances》 |2016年第65期|共7页
  • 作者

    Li Lingyun; Xu Donghui; Pei Zhiguo;

  • 作者单位

    Chinese Acad Agr Sci Inst Vegetables &

    Flowers Minist Agr Supervis &

    Testing Ctr Vegetable Qual Beijing Beijing 100081 Peoples R China;

    Chinese Acad Agr Sci Inst Vegetables &

    Flowers Minist Agr Supervis &

    Testing Ctr Vegetable Qual Beijing Beijing 100081 Peoples R China;

    Chinese Acad Sci Res Ctr Ecoenvironm Sci State Key Lab Environm Chem &

    Ecotoxicol POB 2871 Beijing 100085 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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