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<p>Heavy metal pollution of aquatic sources is a major worldwide problem. Chromium is a very harmful heavy metal that may harm living things in many ways. The new study uses CuO NPs and chitosan composite synthesized using the green method to remove chromium ions from contaminated water sources. The produced materials were characterized by Fourier-transform Infrared Spectroscopy (FTIR), Ultraviolet–Visible Spectroscopy (UV–Vis), Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), Atomic Absorption Spectroscopy (AAS), Field Emission Scanning Electron Microscopy (FESEM), and Energy Dispersive X-ray (EDX) to comprehend the morphological, structural, and surface phenomena associated with chromium adsorption. The CuO NPs synthesized from green approach (GNPs) and CuO- chitosan green composite (GCS) showed maximal chromium adsorption capabilities of 288&#xa0;mg&#xa0;g<sup>−1</sup> and 427&#xa0;mg&#xa0;g<sup>−1</sup>, respectively. Second-order kinetics apply to both adsorption processes. Some research on batch adsorption was carried out to comprehend the favorable circumstances of the adsorption process as at pH5 and after 1&#xa0;h of contact time, the removal efficiency reached 91.4% for the CuO nanoparticles and 91% for CuO-chitosan composite. Adsorbents might be regenerated up to seven times in a row without losing their ability to absorb.</p>

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Sustainable Remediation of Chromium-Contaminated Water Using Green-Derived Copper Oxide Nanoparticles and Copper Oxide-Chitosan Composite

  • 期刊论文

  • 发表日期：

    2026年1月9日

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  • Bharti Mehlawat,
  • Anamika Srivastava,
  • Nirmala Kumari Jangid,
  • Manish Srivastava

摘要

Heavy metal pollution of aquatic sources is a major worldwide problem. Chromium is a very harmful heavy metal that may harm living things in many ways. The new study uses CuO NPs and chitosan composite synthesized using the green method to remove chromium ions from contaminated water sources. The produced materials were characterized by Fourier-transform Infrared Spectroscopy (FTIR), Ultraviolet–Visible Spectroscopy (UV–Vis), Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), Atomic Absorption Spectroscopy (AAS), Field Emission Scanning Electron Microscopy (FESEM), and Energy Dispersive X-ray (EDX) to comprehend the morphological, structural, and surface phenomena associated with chromium adsorption. The CuO NPs synthesized from green approach (GNPs) and CuO- chitosan green composite (GCS) showed maximal chromium adsorption capabilities of 288 mg g−1 and 427 mg g−1, respectively. Second-order kinetics apply to both adsorption processes. Some research on batch adsorption was carried out to comprehend the favorable circumstances of the adsorption process as at pH5 and after 1 h of contact time, the removal efficiency reached 91.4% for the CuO nanoparticles and 91% for CuO-chitosan composite. Adsorbents might be regenerated up to seven times in a row without losing their ability to absorb.