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<p>This study evaluates the biosorption of lanthanum (III) ions, using <i>Aspergillus niger</i> (<i>A. niger</i>) native and modified with di-(2-ethylhexyl) phosphoric acid (<i>A. niger</i>-DEHPA). Biosorption performance was assessed as a function of pH, time, temperature, initial ion concentration, and adsorbent dosage. FT-IR, SEM, and EDX analyses confirmed successful surface impregnation and La(III) binding. <i>A. niger</i>-DEHPA achieved higher sorption capacity (99.01&#xa0;mg/g) than native biomass (74.07&#xa0;mg/g). Equilibrium followed the Langmuir and D-R models, while kinetics fit the pseudo-second-order model. Biosorption was spontaneous, feasible and entropy driven. The biosorbents showed higher efficiency in extracting La(III) from multi-ion solutions and granite leachate.</p>

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Potential of eco-friendly lanthanum separation using DEHPA-modified Aspergillus niger

  • 期刊论文

  • 发表日期：

    2026年1月23日

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  • Walaa S. Hafez,
  • Mohamed M. Rezk,
  • Mahmoud O. Abd El-Magied,
  • Mohamed A. Youssef,
  • Wessam M. Morse,
  • Ekramy M. El-desouky,
  • El-Sayed A. Manaa

摘要

This study evaluates the biosorption of lanthanum (III) ions, using Aspergillus niger (A. niger) native and modified with di-(2-ethylhexyl) phosphoric acid (A. niger-DEHPA). Biosorption performance was assessed as a function of pH, time, temperature, initial ion concentration, and adsorbent dosage. FT-IR, SEM, and EDX analyses confirmed successful surface impregnation and La(III) binding. A. niger-DEHPA achieved higher sorption capacity (99.01 mg/g) than native biomass (74.07 mg/g). Equilibrium followed the Langmuir and D-R models, while kinetics fit the pseudo-second-order model. Biosorption was spontaneous, feasible and entropy driven. The biosorbents showed higher efficiency in extracting La(III) from multi-ion solutions and granite leachate.