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Membrane Water Treatment
  Volume 7, Number 1, January 2016 , pages 23-38

Adsorption of methyl orange from aqueous solution on anion exchange membranes: Adsorption kinetics and equilibrium
Muhammad Imran Khan, Liang Wu, Abhishek N. Mondal, Zilu Yao, Liang Ge and Tongwen Xu

    Batch adsorption of methyl orange (MO) from aqueous solution using three kinds of anion exchange membranes BI, BIII and DF-120B having different ion exchange capacities (IECs) and water uptakes (WR) was investigated at room temperature. The FTIR spectra of anion exchange membranes was analysed before and after the adsorption of MO dye to investigate the intractions between dye molecules and anion exchange membranes. The effect of various parameters such as contact time, initial dye concentration and molarity of NaCl on the adsorption capacity was studied. The adsorption capacity found to be increased with contact time and initial dye concentration but decreased with ionic strength. The adsorption of MO on BI, BIII and DF-120B followed pseudo-first-order kinetics and the nonlinear forms of Freundlich and Langmuir were used to predict the isotherm parameters. This study demonstrates that anion exchange membranes could be used as useful adsorbents for removal of MO dye from wastewater.
Key Words
    adsorption; anion exchange membrane; methyl orange; langmuir isotherm; freundlich isotherm
CAS Key Laboratory of Soft Matter Chemistry, Lab of Functional Membranes, School of Chemistry and Material Science, University of Science and Technology of China, Hefei, Anhui 230026, P.R. China.

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