Original Articles: 2011 Vol: 3 Issue: 1
Equilibrium and kinetic studies of reactive Red 2 Dye Adsorption onto prepared activated carbons
Three activated carbons, viz., NCDC, NCMC and NCAC, are prepared from peels of some selected citrus fruits citrus documana, citrus medica and citrus aurantifolia respectively and are used to adsorb commercial reactive dye, C.I. reactive red 2 (Red M5B) from aqueous solution. Out of applied Freundlich, Langmuir, Tempkin and Dubinin-Radushkevich (D-R) isotherms, Langmuir isotherm was fitted well with the adsorption equilibrium data. The kinetic process was investigated using the pseudo-first-order, pseudo-second-order, intra-particle diffusion, pore diffusion and Elovich models. The adsorption process offered excellent fit with pseudo-secondorder model. SEM-EDAX and FT-IR analyses were used to study the surface characteristics of adsorbents. Amino groups present on the surface of adsorbents are electrostatically attracting the sulphonyl groups of anionic reactive red 2 dye.