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首页> 外文期刊>RSC Advances >Graphene oxide/Fe3O4/SO3H nanohybrid: a new adsorbent for adsorption and reduction of Cr(VI) from aqueous solutions
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Graphene oxide/Fe3O4/SO3H nanohybrid: a new adsorbent for adsorption and reduction of Cr(VI) from aqueous solutions

机译：石墨烯氧化物/ Fe3O4 / SO3H纳米胺：一种新吸附剂，用于从水溶液中吸附和减少Cr（VI）

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摘要

A sulfonated magnetic graphene oxide (SMGO) hybrid was successfully synthesized via the nucleophilic substitution reaction and characterized. The removal of chromate by SMGO was investigated. The effects of contact time, initial pH of the solution, and initial chromate concentration on the removal efficiency were investigated. The optimal experimental conditions for enhanced chromate removal were found to be a contact time of 60 min at an initial solution pH of 3. The observed data were fitted with Lagergren pseudo-second-order kinetic model, indicating that chromate adsorption on SMGO was a chemical interaction in nature. The Langmuir model was also used to describe the adsorption processes and the adsorption capacity was found to be 222.22 mg g (1). Thermodynamic studies (triangle G < 0, triangle H > 0, triangle S > 0) revealed that the adsorption process was exothermic and spontaneous. SMGO has potential to be applied several times after desorption in wastewater treatment.
机译：通过亲核取代反应成功地合成了磺化磁性石墨烯氧化物（SMGO）杂种并表征。 研究了SMGO去除铬酸盐。 研究了接触时间，溶液的初始pH和初始铬酸盐浓度对去除效率的影响。 发现增强铬酸盐去除的最佳实验条件是在初始溶液pH下的60分钟的接触时间为3.观察到的数据与Lagergren伪二阶动力学模型配有，表明在SMGO上的铬酸盐吸附是一种化学物质 互动本质上。 Langmuir模型还用于描述吸附过程，发现吸附能力为222.22mg（1）。 热力学研究（三角G <0，三角形H> 0，三角形S> 0）显示吸附过程是放热和自发的。 在废水处理后解吸后，SMGO具有多次应用。

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  • 来源
    《RSC Advances》 |2017年第24期|共12页
  • 作者

    Alizadeh Abdolhamid; Abdi Gisya; Khodaei Mohammad Mehdi; Ashokkumar Muthupandian; Amirian Jhaleh;

  • 作者单位

    Razi Univ Fac Chem Dept Organ Chem Kermanshah 6714967346 Iran;

    Razi Univ Fac Chem Dept Organ Chem Kermanshah 6714967346 Iran;

    Razi Univ Fac Chem Dept Organ Chem Kermanshah 6714967346 Iran;

    Univ Melbourne Sch Chem Melbourne Vic 3010 Australia;

    Soonchunhyang Univ Coll Med Dept Regenerat Med 366-1 Sangyong Dong Cheonan 330090 Chung Cheong Na South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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