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<p>Recently, adsorption by nanomaterials and reverse osmosis has become the leading technologies for heavy metal removal. In a comparative study on Cu<sup>2+</sup> removal efficiency, carboxyl multiwalled carbon nanotubes and RO membrane filtration were considered in terms of their efficiency. Fourier Transform Infrared (FTIR), Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), Brunauer–Emmett–Teller (BET), and X-Ray Diffraction (XRD) were employed for nanotube characterization. In the adsorption processes, the effects of such parameters as contact time, adsorbent dosage, pH of the solution, and initial concentration of Cu<sup>2+</sup> on the efficiency of adsorption were assessed. The Cu<sup>2+</sup> removal efficiency was 99.24% under optimum conditions, featuring a contact time of 120&#xa0;min, pH of 9.5, adsorbent dosage of 50&#xa0;mg, and an initial concentration of Cu<sup>2+</sup> of 75&#xa0;mg/L. Furthermore, the adsorption was matched by both Freundlich isotherm and the pseudo-second-order kinetic model. In the RO process, the transmembrane pressure, feed pH, and initial Cu<sup>2+</sup> concentration influenced efficiency. The results show that, according to operating conditions, Cu<sup>2+</sup> retention rates fluctuate between 97.11% and 99.33% in RO processes. </p>

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Comparison Between the Efficiencies of Reverse Osmosis Membrane and Carboxyl Multi-Walled Carbon Nanotubes in Copper Ions (Cu2+) Removal from Synthesized Wastewater

  • 期刊论文

  • 发表日期：

    2025年6月3日

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  • Sareh Aghababaee,
  • Seyed Ahmad Mirbagheri,
  • Amirhossein Mohammadi

摘要

Recently, adsorption by nanomaterials and reverse osmosis has become the leading technologies for heavy metal removal. In a comparative study on Cu2+ removal efficiency, carboxyl multiwalled carbon nanotubes and RO membrane filtration were considered in terms of their efficiency. Fourier Transform Infrared (FTIR), Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), Brunauer–Emmett–Teller (BET), and X-Ray Diffraction (XRD) were employed for nanotube characterization. In the adsorption processes, the effects of such parameters as contact time, adsorbent dosage, pH of the solution, and initial concentration of Cu2+ on the efficiency of adsorption were assessed. The Cu2+ removal efficiency was 99.24% under optimum conditions, featuring a contact time of 120 min, pH of 9.5, adsorbent dosage of 50 mg, and an initial concentration of Cu2+ of 75 mg/L. Furthermore, the adsorption was matched by both Freundlich isotherm and the pseudo-second-order kinetic model. In the RO process, the transmembrane pressure, feed pH, and initial Cu2+ concentration influenced efficiency. The results show that, according to operating conditions, Cu2+ retention rates fluctuate between 97.11% and 99.33% in RO processes.