Removal of Maxilon Red GRL from aqueous solutions by adsorption onto silica

摘要

The adsorption of basic dyes (maxilon red GRL) from an aqueous solutions by silica was . investigated. Adsorption of maxilon red (GRL) onto silica samples was studied by batch adsorption techniques at 24±1 °C. The adsorption behavior of maxilon red (GRL) on silica samples was investigated using a Uv-vis spectrophotometric technique. In batch system, the effect of five different initial dye concentrations and using six different times on adsorption was evaluated. Values of the removal efficiency of the dye ranged from 47.7 to 96%. The equilibrium adsorption isotherms have been studied by Langmuir and Freundlich models. The experimental results have been fitted Langmuir and Freundlich models. Langmuir adsorption capacity,q_m was found to be 3.03 mg/ g silica at 24±1 ℃. Also, initial concentrations and the equilibrium concentration of dye solutions were subjected to a comprehensive colorimetric appraisal using the CIE L~·a~·b~·colour space system.