Citrus peels are a globally abundant agricultural waste, produced in large quantities due to the increasing consumption of citrus fruits such as oranges lemons and tangerine, making them a sustainable and available resource for innovative and environmentally friendly uses. This study investigated the ability of tangerine peels as one of the types of accumulated agricultural wastes as an adsorbent to recover hexavalent chromium ions, which classified as one of the carcinogenic substances from polluted aqueous solutions. The treatment process was carried out under different operating conditions using laboratory adsorption unit of batch mode. The operating conditions ranges studied were 20-50 °C, 10-180 min, 1-10 ppm, 100-500 rpm, 1-8, for temperature, contact time, initial concentration of chromium, agitation speed, pH, and adsorbent dosage, respectively. The obtained results showed that the adsorption efficiency is directly proportional to all variables except the initial concentration, while it increases with the increase of the pH, until it reaches a certain limit and then begins to decrease. 72.4% was the highest treatment efficiency and was achieved at a value of 4 for the acidity function, 350 rpm for the agitation speed, 8 ppm for the initial concentration, 5 g of adsorption medium, 120 min adsorption time, and 50 °C temperature. The results of FTIR analysis showed that the tangerine peels contain multi-functional groups responsible for capturing chromium ions and the surface area of the raw peels decreased by 93% after adsorption, indicating that this material is highly effective in adsorption of heavy metals in general and chromium in particular.