Abstract

*Fariba Norozi and Gholamali Haghdoost

DOI : http://dx.doi.org/10.13005/ojc/320460

In this Work, We have studied the adsorption of the isotherm of Mn(VII), on Corn cob from aqueous solutions. The effects of pH, initial metal ion concentration, contact time, Corn cobdosage and temperature on the adsorption performance of Corn cob for Mn(VII) ions were examined by batch method. Increasing the Mn(VII) initial concentration declines the Mn(VII) adsorption rate investigated through adsorption Mn(VII) removal at pH=4 condition for t_C=60 min in equilibrium-batch mode system. The adsorption equilibrium isotherms were fitted by Freundlich and Langmuir models. It was found that the Langmuir model described the adsorption process better than the Freundlich isotherm,(R²=0.9854), thus indicating the applicability of mono layer coverage of Mn(VII) ion on Corn cob surface.The relationship between thermodynamic parameters was used to predict the absorption process. Thermodynamic analysis showed that the adsorption process was endothermic and spontaneous in nature.

Corn cob; Mn(VII) Ions; Adsorption; Isotherm; thermodynamic

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