α and γ Alumina Spheres for Azo Dye (Allura Red) Removal from Aqueous Media

Allura red or Red 40 (R40) is a dye widely used in the food, textile, and pharmaceutical industries; it considered dangerous because soluble water, has high toxicity resistance to natural degradation. Several advanced wastewater treatments have been shown be effective for R40 removal but some of them present disadvantages such as by-products obtention, energy consumption, cost reactants process. In work, α-Alumina (Alu) γ-Alu spheres were synthesized by encapsulation method. The prepared characterized FT-IR, XRD, SEM/EDS, SBET, was determined presence only inorganic bonds from ceramic material, amorphous alumina observed with smooth uniform surface pores. adsorption kinetics isotherms performed, well material regeneration consequent sorption cycles. Sorption tests carried out under different conditions initial concentration, pH value, interfering ions. maximal capacity synthetized α- situated between 0.1765 18.9865 mg/g. Different kinetic isothermal equations applied finally, experimental data described Elovich Freundlich models. after five heat treatment cycles showed stable behavior potential re-use new processes >97.7% at 3 >85.6% C 0 =10 mg/L. obtained results that are novel, alternative, sustainable materials process azo aqueous media.