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Membrane Water Treatment   Volume 5, Number 4, October 2014, pages 295-304
Adsorptive separation of adipic acid from aqueous solutions by perlite or its composites by manganese or copper
Hasan Uslu, Gőksel Demir, Cuma Bayat, Kailas L. Wasewar and Hisham S. Bamufleh

Abstract     [Buy Article]
    Adipic acid (hexane-1,6-dioic acid) is one of the most used chemical in industrial applications. This must be separated from any environmental contaminant. In this study, adipic acid separation from wastewater by adsorption method onto Perlite or Perlite + Mn or Perlite + Cu composites was investigated. Adsorption of Adipic acid was investigated in terms of equilibrium, and thermodynamic conditions. For thermodynamic investigations the experiments carried out at three different temperatures (298 K, 318 K, 328 K). In the equilibrium studies, 2 g of perlite and its composites were determined as the optimal adsorbent amount. Freundlich and Langmuir isotherms were applied to the experimental data. Freundlich isotherms for all temperatures used in this work gave some deviations with R square values under 0.98 where as Langmuir isotherm gave good results with R square values upper 0.99 at different temperatures. As a result of thermodynamic studies, adsorption enthalpy (ΔH), adsorption entropy (ΔS), and adsorption free energy (ΔG) have been calculated for each adsorbents.
Key Words
    adsorption; adipic acid; perlite; manganese; copper
(1) Hasan Uslu:
Beykent University, Engineering and Architecture Faculty, Chemical Engineering Department, Ayazağa Īstanbul, Turkey;
(2) Gőksel Demir:
Bahçeşehir University, Engineering Faculty, Environmental Engineering Department, BeşiktaşĪstanbul, Turkey;
(3) Cuma Bayat:
Īstanbu Esenyurt University, Engineering and Architecture Faculty, Industrial Engineering Department, Esenyurt, Istanbul, Turkey;
(4) Kailas L. Wasewar:
Advance Separation and Analytical Laboratory (ASPAL), Department of Chemical Engineering, Visvesvaraya National Institute of Technology, Nagpur-440010 (M.S) India;
(5) Hisham S. Bamufleh:
Department of Chemical & Materials Engineering, Faculty of Engineering, King Abdulaziz University, P.O. Box 80204, Jeddah 21589, Saudi Arabia.

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