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<p>This research introduces a novel biocomposite synthesized by incorporating diethylaminoethyl cellulose (DEAE-C) with natural hydroxyapatite (Hap) derived from fish scales, designed for the adsorption of Pb(II) ions from water. Comprehensive characterization was performed using FTIR, XRD, SEM-EDS, TGA, and BET analyses to elucidate the interactions and complexation between Hap and DEAE-C. Batch adsorption experiments assessed the effect of the contact time, initial Pb(II) concentration, pH, and temperature. The adsorption equilibrium conformed to the Langmuir model, with a maximum uptake (q<sub>max</sub>) of 147.7&#xa0;mg g⁻¹ at 25&#xa0;°C. Kinetic studies indicated a pseudo-first order model for adsorption, while thermodynamic analysis revealed the process to be endothermic and spontaneous. Mechanistic insights derived from theoretical calculations and XPS analysis identified ion exchange and electrostatic interactions as the predominant mechanisms. The DEAE-C–Hap composite exhibited outstanding adsorption properties, underscoring its potential for practical applications in wastewater treatment. In conclusion, the cellulose composite containing natural hydroxyapatite exhibited excellent adsorption properties for heavy metal remediation.</p>

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A Novel Biocomposite of Diethylaminoethyl Cellulose Fiber Incorporated Fish Scale Derived Hydroxyapatite for Lead (II) Removal: Experimental and Mechanistic Adsorption

  • 期刊论文

  • 发表日期：

    2025年11月19日

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  • Abdullah N. Alotaibi,
  • Jari S. Algethami,
  • Rachid EL Kaim Billah,
  • Lahoucine Bahsis,
  • Abdullah Al-Dakhil,
  • Abdulhadi H. AlMarri,
  • Alaa El Din Mahmoud

摘要

This research introduces a novel biocomposite synthesized by incorporating diethylaminoethyl cellulose (DEAE-C) with natural hydroxyapatite (Hap) derived from fish scales, designed for the adsorption of Pb(II) ions from water. Comprehensive characterization was performed using FTIR, XRD, SEM-EDS, TGA, and BET analyses to elucidate the interactions and complexation between Hap and DEAE-C. Batch adsorption experiments assessed the effect of the contact time, initial Pb(II) concentration, pH, and temperature. The adsorption equilibrium conformed to the Langmuir model, with a maximum uptake (qmax) of 147.7 mg g⁻¹ at 25 °C. Kinetic studies indicated a pseudo-first order model for adsorption, while thermodynamic analysis revealed the process to be endothermic and spontaneous. Mechanistic insights derived from theoretical calculations and XPS analysis identified ion exchange and electrostatic interactions as the predominant mechanisms. The DEAE-C–Hap composite exhibited outstanding adsorption properties, underscoring its potential for practical applications in wastewater treatment. In conclusion, the cellulose composite containing natural hydroxyapatite exhibited excellent adsorption properties for heavy metal remediation.