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Study on mass transfer characteristics for Cr (VI) removal by adsorption onto residual black toner ink

机译：残留黑色墨粉墨水吸附去除Cr（VI）的传质特性研究

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摘要

This study was aimed to assess the adsorption capacity of residual black toner ink (RBTI) for the removal of heavy metal Cr (VI), ions in batch mode. To achieve this objective, the effects of different experimental parameters viz., initial Cr (VI) concentration, adsorbent dose, initial pH of solution and temperature on Cr (VI) uptake were studied. The kinetic parameters were evaluated using model equations of Lagergren (pseudo first order), pseudo second order, and Weber and Morris. The Langmuir, Freundlich, Dubinin-Radushkevich isotherms were fitted to experimental data for establishing the adsorption equilibrium. Calculation of thermodynamic parameters (ΔGº, ΔHº, ΔSº) was also done to demonstrate the nature of adsorption. Thermodynamic parameters (ΔGº= −2.5885 kJ/mol, ΔHº= 282.74 kJ/mol, ΔSº= 0.9574 kJ/mol.K) revealed that adsorption of Cr (VI) using RBTI was endothermic, spontaneous and increased with temperature. To investigate the physical and chemical properties of RBTI, SEM-EDX and FTIR analyses were done. The maximum adsorption capacity of RBTI for Cr (VI) removal was found to be 13.98 mg/g.
机译：这项研究旨在评估残留的黑色碳粉墨水（RBTI）以分批方式去除重金属Cr（VI）离子的吸附能力。为了达到这个目的，研究了不同的实验参数，即初始Cr（VI）浓度，吸附剂剂量，溶液的初始pH值和温度对Cr（VI）吸收的影响。使用Lagergren（伪一阶），伪二阶以及Weber和Morris的模型方程评估动力学参数。将Langmuir，Freundlich，Dubinin-Radushkevich等温线拟合至实验数据，以建立吸附平衡。还进行了热力学参数（ΔGº，ΔHº，ΔSº）的计算，以证明吸附的性质。热力学参数（ΔGº= -2.5885 kJ / mol，ΔHº= 282.74 kJ / mol，ΔSº= 0.9574 kJ / mol.K）显示，RBTI对Cr（VI）的吸附是吸热的，自发的并随温度增加。为了研究RBTI的物理和化学性质，进行了SEM-EDX和FTIR分析。 RBTI去除Cr（VI）的最大吸附能力为13.98 mg / g。

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  • 来源
    《Environmental progress》 |2017年第4期|1022-1029|共8页
  • 作者

    Singh Rathore Ajay; Kishore Gupta Goutam; Kapur Meghna; Kumar Mondal Monoj;

  • 作者单位

    Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, India;

    Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, India;

    Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, India;

    Department of Chemical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cr (VI) adsorption; isotherms; kinetics; RBTI; thermodynamics;

    机译：Cr（VI）吸附;等温线动力学;RBTI;热力学;

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