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The disposal of coal discards (CD) and sewage sludge (SS) is a substantial problem in waste management in coal beneficiation and wastewater treatment plants (WWT). This work contributes to the reduction of environmental effects by producing hydrochar as an adsorbent (HC) for the removal of copper from wastewater. The produced adsorbent was characterised using FTIR, SEM, XRF and BET. The effect of pH, particle size and dosage of HC was determined for removal efficiency. The highest removal was found to be 90.41% at pH 6, particle size of 2 mm and HC dosage of 2 g/ 200 mL Freundlich and D-R isotherm models revealed that the adsorption process is chemisorption. Thermodynamic studies indicated that the adsorption of Cu was endothermic and spontaneous and randomness in nature.

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Utilisation of Coal Waste and Sewage Sludge for the Production of Hydrochar as Adsorbent Material for the Copper Removal from Wastewater

  • 会议论文

  • 发表日期：

    2026年

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  • Rusumba Bienvenu Cherubala,
  • John Kabuba

摘要

The disposal of coal discards (CD) and sewage sludge (SS) is a substantial problem in waste management in coal beneficiation and wastewater treatment plants (WWT). This work contributes to the reduction of environmental effects by producing hydrochar as an adsorbent (HC) for the removal of copper from wastewater. The produced adsorbent was characterised using FTIR, SEM, XRF and BET. The effect of pH, particle size and dosage of HC was determined for removal efficiency. The highest removal was found to be 90.41% at pH 6, particle size of 2 mm and HC dosage of 2 g/ 200 mL Freundlich and D-R isotherm models revealed that the adsorption process is chemisorption. Thermodynamic studies indicated that the adsorption of Cu was endothermic and spontaneous and randomness in nature.