The juices and nectars of orange produce large quantities of low-value commercial waste such as their peels.These residues have become a major environmental worry due to their high organic matter load, having a high fermentability rate, and causing serious economic and environmental problems for their disposal.However, these residues retain functional compounds such as vitamins C, phenols, and flavonoids which are recognized for their antioxidant, anti-inflammatory and anticancer properties.The present study aims to evaluate the Cr(III) adsorption capacity in aqueous solutions using treated orange peel (OPT) as adsorbent at 15°C, 30°C and 45°C and different ratios (8 to 40 g L -1 ) of adsorbent-solution.The results show that the adsorption isotherms conform to the Sips model having the maximum adsorption capacity of 15.3 mg g -1 with 95% removal of Cr(III).It was observed that the process is endothermic and spontaneous.The adsorption kinetics of Cr(III) follows a pseudo-second-order model.Cr(III) removal using OPT was analyzed with the techniques of X-ray diffraction, Fourier-transform infrared spectroscopy, ultraviolet-visible and scanning electron microscopy images.The obtained results suggest that it is feasible to take advantage of OPT to obtain functional compounds and remove Cr(III) from aqueous solutions.