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The type of dyes used in textile industries are synthetic dyes which are toxic and cause harm to the aquatic ecosystem; in this paper, adsorptive removal of dye Color Index Acid Orange 67 pollutant from aqueous solutions using a novel resin synthetic from waste foam packing was investigated using the batch method. The adsorbent was characterized by Fourier-transform infrared spectroscopy (FTIR), surface morphology, and zero surface charge. Batch adsorption studies were carried out under various parameters such as contact time, pH, initial dye concentration, adsorbent dosage, and solution temperature on the removal of AO67. Experimental isotherm data were analyzed using Langmuir, Freundlich, Dubinin–Radushkevich (D-R), and Temkin isotherm models, and the isotherm constants were calculated using linear regression analysis for the determination of the isotherm parameters which describe the adsorption process. The best fit was obtained by Langmuir model. A comparison of kinetic models applied to the adsorption of Acid Orange 67 (AO67) onto resin polystyrene foam (RPSF) was evaluated for the pseudo-first-order, the pseudo-second-order, Elovich, intraparticle diffusion, and Bangham’s kinetics models. The adsorption kinetic data were properly fitted very well with the pseudo-second-order kinetic model. The thermodynamic parameters and activation energy were evaluated. The results have established good potentiality for the RPSF to be used as an adsorbent for the removal of AO67 from aqueous solutions. The optimum conditions attained in this study were used for removal of (RB222, RY145, and AR37) from the simulated wastewaters onto RPSF.

Synthetic and application of a novel resin from waste foam packing for adsorption of Acid Orange 67 from aqueous solution