investigation of manganese ion removal from waters using sewage sludge ash

In this study, the removal of mn²+ ions from waters by the adsorption method using ash obtained from a treatment plant sludge burning unit, which is treatment plant waste and mostly disposed of in a landfill, was investigated. by determining the most suitable conditions for adsorption, adsorption kinetics, isotherms, and thermodynamic values were determined. in the experiments, 63.9% removal efficiency was achieved using 10 g/l adsorbent concentration for 10 mg/l mn²+ under optimum conditions. as a result of the research, it was determined that the adsorption proceeds according to the pseudo-second-degree reaction and abides by the langmuir isotherm. the thermodynamic constants of δh°= -4.866 kj/mol and δs°= 21.44 j/mol were determined. as a result of this, the reaction was exothermic, spontaneous, and random, and adsorption was physical adsorption. as a result of the study, sewage sludge ash can be used in the treatment of water containing low concentrations of mn²+.