Recycling of Conditioned Alum Sludge Use as an Adsorbent for Decolorization of Effluents From the Textile Industry

Abstract

Alum sludge from Kedwan station in Minia, Egypt conditioned with lime +ferric chloride mixture was utilized to adsorb Methylene Blue dye (MB). In this study, groups of batch experiments were designed to explore Equilibrium adsorption of MB onto the alum sludge. The percentage dye removal using alum sludge was 87.5% and the maximum adsorption capacity was found to be 67.94 (mgdye/galum sludge). With regard to adsorption capacity; Equilibrium modeling has been executed using the Langmuir and the Freundlich, isotherms. The Langmuir isotherm adapted the experimental data more than Freundlich isotherms based on the high value of the correlation coefficient and graphical presentation. Experimental results on laboratory-scale indicated that reutilization of alum sludge as an effective and low-cost adsorbent for treatment of colored effluents thus, could be considered as alternative for the high cost commercial activated carbon and may be useful in solving environmental issues and waste management.