Methylene blue removal from aqueous solutions using ferric chloride sludge obtained from water treatment plant

Abstract

Introduction Today, synthetic Dye are extensively used different industries such as textiles, pulp, leather, food and cosmetic. Doys contained wastewater to prevent environmental consequences of must be treated effectively. The present work aimed to investigate the potential application of water treatment ferric sludge in the removal of Methylene blue (MB). Materials and Methods The present experimental work was done on aqueous synthetic samples and in batch sorption mode. The effects of operating variables (pH, dose, contact time, an initial concentration of color), as well as kinetic and isotherm studies also included in this work. The adsorbent was prepared by drying the waste sludge treatment plant at 105C °. Results The maximum MB removal of was observed at a pH of 11, a contact time of 90 minutes, absorbance dose of 4 g/L and 25 mg/L of methylene blue. The conformity of kinetic and equilibrium data by psedu-second order kinetic and Freundlich models demonstrate that the adsorption occurs in heterogeneous and multi-layer. Conclusion The experimental studies demonstrate the potential use of dried ferric sludge in methylene blue removal from contaminated samples.

Keywords

• ferric chloride sludge
• methylene blue
• Kinetic
• Isotherm
• Absorption