 The research assessed the efficiency of copper oxide nanoparticles as an adsorbent for removing an INCR from aqueous solutions, evaluating factors such as pH, dosage, contact time, initial concentration, and adsorption models. Results showed that the highest removal rate occurred at optimal conditions, with Langmuir isotherm being the best fit model and kinetic adsorption following a second-order pseudo-model. Overall, copper oxide nanoparticles are effective and environmentally-compatible adsorbents for removing an INCR ions from aqueous solutions. This article was authored by Razia Hosseini, Muhammad Hossein Sayadi, and Hossein Shikari.