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Abstract <p>Water contamination caused by heavy metals is a global issue raising serious concerns. Thus, in this study, we aimed to synthesize and evaluate an adsorptive quaternary composite (Mn/Ag/Graphene@PANI) for the dynamic removal of nickel ions (Ni (II)) from water. The composite was prepared using a one-step in-situ intercalation polymerization of aniline and its synthesis was confirmed using FTIR (Fourier Transform Infrared Spectroscopy), XRD (X-Ray Diffraction Spectroscopy), SEM (Scanning Electron Microscopy), and EDX (Energy Dispersive X-Ray Spectroscopy). The composite's efficiency in Ni(II) ion removal was assessed through batch adsorption experiments. The maximum adsorption value of 94 ± 3% for Ni(II) was achieved at optimum values of pH, contact time, adsorbent doses, and adsorbate volume that were 6, 30&#xa0;min, 10&#xa0;mg, and 1&#xa0;ml, respectively. The adsorption data of Ni(II) ions were found to be well fitted with Langmuir model confirming the composite's potential as an effective adsorbent for Ni(II) removal from waste water with 130.17 ± 6.831 and 0.0284 of q<sub>max</sub> and K<sub>L</sub> values, respectively. The composite also demonstrated good recyclability; regeneration studies showed that the adsorbent retained approximately 79% of its initial adsorption after three consecutive sorption/desorption cycles. The presence of co-existing ions like Cd, Pb, Cu, Zn, and Na had an insignificant effect, with a maximum reduction of 34 ± 2% removal of Ni(II) in the multi-ions. These findings suggest that Mn/Ag/Graphene@PANI is a promising, efficient, and reusable adsorbent for the remediation of Ni(II)-contaminated wastewater.</p>

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Investigational Studies of Mn/Ag/Graphene@PANI Quaternary Composite for Ni(II) Removal Efficiency

  • 期刊论文

  • 发表日期：

    2026年7月24日

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  • Muhammad Saleem,
  • Aamir Rasheed,
  • Aneeqa Surkhab,
  • Mahnoor Shireen,
  • Rana Hamza Zafar

摘要

Abstract

Water contamination caused by heavy metals is a global issue raising serious concerns. Thus, in this study, we aimed to synthesize and evaluate an adsorptive quaternary composite (Mn/Ag/Graphene@PANI) for the dynamic removal of nickel ions (Ni (II)) from water. The composite was prepared using a one-step in-situ intercalation polymerization of aniline and its synthesis was confirmed using FTIR (Fourier Transform Infrared Spectroscopy), XRD (X-Ray Diffraction Spectroscopy), SEM (Scanning Electron Microscopy), and EDX (Energy Dispersive X-Ray Spectroscopy). The composite's efficiency in Ni(II) ion removal was assessed through batch adsorption experiments. The maximum adsorption value of 94 ± 3% for Ni(II) was achieved at optimum values of pH, contact time, adsorbent doses, and adsorbate volume that were 6, 30 min, 10 mg, and 1 ml, respectively. The adsorption data of Ni(II) ions were found to be well fitted with Langmuir model confirming the composite's potential as an effective adsorbent for Ni(II) removal from waste water with 130.17 ± 6.831 and 0.0284 of qmax and KL values, respectively. The composite also demonstrated good recyclability; regeneration studies showed that the adsorbent retained approximately 79% of its initial adsorption after three consecutive sorption/desorption cycles. The presence of co-existing ions like Cd, Pb, Cu, Zn, and Na had an insignificant effect, with a maximum reduction of 34 ± 2% removal of Ni(II) in the multi-ions. These findings suggest that Mn/Ag/Graphene@PANI is a promising, efficient, and reusable adsorbent for the remediation of Ni(II)-contaminated wastewater.