Adsorption of Acid blue 92 dye on modified diatomite by nickel oxide nanoparticles in aqueous solutions

Adsorbent prepared from waste plants for the treatment of dyeing effluents have high significance in environmental sustainability. In this research, adsorption of Acid Blue 92AB 92 dye from aqueous solutions on raw and modified diatomite nickel oxide nanoparticles was studied. The effect of different operation parameters such as pH, contact time, initial dye concentration, calcinations and sorbent dosage on the adsorption process was evaluated and optimum experimental conditions were identified. The mean size and the surface morphology of the adsorbent was characterized by SEM, BET, FTIR, XRD and elemental analysis. The maximum percentage removal of AB 92 dye from aqueous solution using 0.1 gr of modified diatomite at pH 2, temperature 25±1°C, agitation speed of 200 rpm, initial dye concentration of 50 mg/L, and for a mixing time period of 90 min was 95.21. Furthermore, under same conditions, the maximum adsorption of dye on raw diatomite was 56.95.