Synthesis, characterization and adsorptive application of ferrocene based mesoporous material for hazardous dye Congo red

Mesoporous adsorbent is prepared first time using ferrocene based surfactant as a template and adsorption of azo dye Congo red is investigated. Adsorbent is characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, dynamic light scattering and N-2 adsorption-desorption and deduced a lofty surface area of 342 m(2)/g. Effect of contact time, adsorbent dose, initial dye concentration and temperature were speculated to optimize adsorption conditions. Experimental data were contemplated for various kinetics and thermodynamic models at different temperatures and insinuated that adsorption process is film diffusion controlled and followed second order kinetics. Langmuir model imparted high value of monolayer capacity as 312.5 mg/g. The values of thermodynamic parameters like enthalpy (Delta H) and entropy (Delta S) were found to be 49.94 kJ/mol and 265.5 J/K/mol, respectively, and negative values of Delta G corroborated that the present adsorption system is feasible, spontaneous and endothermic. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.