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This study investigated the use of waste snail shellsWaste snail shells to produce calcium oxide (CaO) nanoparticles for treating industrial paint effluentIndustrial paint effluent, which is challenging due to the heavy metalsHeavy metals, organic solvents, and suspended solids content. CaO nanoparticles were synthesized via the sol–gel method and characterized using FTIR, DLS, XRD, and SEM. OptimizationOptimizations of treatment conditions was performed using response surface methodologyResponse surface methodology (RSM) with central composite design (CCD), identifying optimal parameters as pH 7, contact time of 52.5 min, and CaO-NPs dosage of 5.5 g/L. Under these conditions, a contaminant removal efficiency of 98.11% was achieved. This research highlighted the effectiveness of CaO nanoparticles derived from waste materials in wastewater treatment and underscores a sustainable, cost-effective approach for environmental remediation.

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Sustainable Treatment of Industrial Paint Effluent Using Calcium Oxide Nanoparticles Derived from Waste Snail (Archachatina Marginata) Shells

  • 会议论文

  • 发表日期：

    2025年

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  • Esther U. Ikhuoria,
  • Tracy Okoduwa,
  • Ikhazuagbe Hilary Ifijen,
  • Ita Erebor Uwidia,
  • Adachukwu Nwaka Nkwor

摘要

This study investigated the use of waste snail shellsWaste snail shells to produce calcium oxide (CaO) nanoparticles for treating industrial paint effluentIndustrial paint effluent, which is challenging due to the heavy metalsHeavy metals, organic solvents, and suspended solids content. CaO nanoparticles were synthesized via the sol–gel method and characterized using FTIR, DLS, XRD, and SEM. OptimizationOptimizations of treatment conditions was performed using response surface methodologyResponse surface methodology (RSM) with central composite design (CCD), identifying optimal parameters as pH 7, contact time of 52.5 min, and CaO-NPs dosage of 5.5 g/L. Under these conditions, a contaminant removal efficiency of 98.11% was achieved. This research highlighted the effectiveness of CaO nanoparticles derived from waste materials in wastewater treatment and underscores a sustainable, cost-effective approach for environmental remediation.