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In this study, copper oxide nanoparticles (CuO) was prepared by simple precipitation method and then it characterize by XRD, SEM, and AFM techniques. XRD spectrum revealed that particle size obtained was around (7.43 nm) for it, which agreed fairly well with XRD data. Surface morphology as a main nanoparticles phenomenon was studied in terms of SEM and AFM. The prepared oxide nanoparticles was used to remove nickel ions from aqueous solution and determining the best removal percentage at different contact time (30, 60, 90, and 120 min) and different initial concentration of aqueous solutions (100, 200, and 300 mg/L) with other constant condition such as pH of 3.5, adsorbent dosage (0.1g), and room temperature . The result showed the percentage removal of nickel ions increase with increase in the contact time, and the maximum adsorption was recorded with 100 mg/L for the prepared oxide nanoparticles, Also the percentage removal seem to decrease with increase in the initial concentration of adsorbate. The correlation coefficient for the linear Freundlich isotherm regression fits are larger than that for the Langmuir one for (CuO), nanoparticles, so the Freundlich model could describe the adsorption isotherm for the uptake of nickel ions from aqueous solution on(CuO), nanoparticles surfaces.

Preparation and Characterization of Copper Oxide Nanoparticles Used to Remove Nickel Ions from Aqueous Solution