Abstract
Calcium peroxide (CaO2) nanoparticles are cost-effective adsorbents to provide high adsorption capacity, rapid adsorption rate, and easy separation. This study investigated the adsorption of α-toluic acid in aqueous solution by CaO2 nanoparticles. CaO2 nanoparticles were synthesized by surface modification technique and characterized by X-ray diffraction, thermogravimetric analysis, differential thermal analysis, Brunauer–Emmett–Teller, energy dispersive X-ray analysis, and transmission electron microscopy (TEM). CaO2 nanoparticles were 8–40nm in diameter identified by TEM. The effects of various parameters on removal of α-toluic acid such as contact time, initial α-toluic acid concentration, CaO2 nanoparticles dosage, agitation speed, and temperature have been investigated. Removal efficiency of 97.7% for α-toluic acid was obtained by 0.05 g/L CaO2 nanoparticles for 13.47 g/L α-toluic acid.
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