화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.37, 156-167, May, 2016
DOI10.1016/j.jiec.2016.03.020  Export Citation
Kinetics, isotherm, and thermodynamic studies of the adsorption of reactive red 195 A dye from water by modified Switchgrass Biochar adsorbent
Mohamed E. Mahmoud, Gehan M. Nabil, Nabila M. El-Mallah, Heba I. Bassiouny, Sandeep Kumar1, and Tarek M. Abdel-Fattah2, †
  • Faculty of Sciences, Chemistry Department, Alexandria University, P.O. Box 426, Ibrahimia 21321, Alexandria, Egypt
  • 1Department of Civil and Environmental Engineering, Old Dominion University, Norfolk, VA 23529, USA
  • 2Applied Research Center at Thomas Jefferson National Accelerator Facility and Department of Molecular Biology and Chemistry, Christopher Newport University, Newport News, VA 23606, USA
E-mail:
A method is described for efficient decolorization of reactive red 195 A dye (RR-195A) from aqueous and wastewater samples using modified Switchgrass Biochar (SB) by tetradecyltrimethyl ammonium bromide (TTAB) as a cationic surfactant for the formation of a novel SB-TTAB adsorbent. The different controlling experimental conditions such as solution pH, initial dye concentration, contact time, adsorbent mass, interfering ions and temperature have been investigated and optimized. Adsorption equilibrium using Langmuir, Freundlich, Temkin and Dubinin.Radushkevich (D-R) isotherm models have been also studied and the best fit was related to the Langmuir adsorption isotherm. Adsorption kinetics have been tested and illustrated using pseudo first-order, pseudo-second-order, intraparticle diffusion and Elovich models. The collected results confirmed that the pseudo-second order kinetic model exhibited the best fit with the experimental data. Thermodynamic parameters were calculated and the results referred to an exothermic nature and spontaneity of the adsorption process. Improved decolorization of reactive red 195 A dye from textile industrial wastewater and other water samples were successfully established. Excellent recovery values of RR-195A dye by SB-TTAB adsorbent were determined in the ranges of 96.61-98.76%, 97.79.99.26%, 94.24-100.0% and 90.98-92.96% (±1.0-4.0%) from tap water, raw water, wastewater and sea water, respectively.
Keywords:Reactive red 195 A dye;Switchgrass Biochar;Thermodynamic parameters;Kinetic study;Adsorption isotherm models
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