Removal of Methylene Blue Dye from Aqueous Solutions by Using Treated Animal Bone As A Cheap Natural Adsorbent

The adsorption behaviors of treated animal bone (TAB) with methylene blue dye (MBD) were studied. The aim of this study is to remove MBD from wastewater. A synthetic solution of 25 mg/L of the dye was used. The adsorption process was affected by contact time, doses of adsorbent, concentration of dye and temperature. It was carried out at constant pH (7.1). The optimum contact time was 90 min and 0.15 g was a suitable dose of adsorbent. Different concentrations of MBD ranging from 25 to 70 mg/L were used in the batch process. The uptake percentage, distribution coefficient (Kd), dimensionless separation factor (RL) and maximum adsorption capacity (Qm) were calculated. 80% of MBD was removed by TAB at 25C, reaching 90% at 55C. The isothermal adsorption curves of MBD onto TAB indicate that the ratio matches Freundlich equation. The obtained results show that TAB is a suitable cheap adsorbent for the elimination of methylene blue dye from wastewater. KeywordsIsothermal models, removal, methylene blue, treated animal bone.