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March 31, 2026ChemPlusChem

Hydroxyapatite as an Effective Adsorbent for Cu 2+ and Ni 2+ : Study on Adsorption and Metal Recovery by Electrochemical Deposition in Deep Eutectic Solvent

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Authors

TLThi Phuong Thao LeHanoi University of Mining and GeologyTLThi Duyen LeHanoi University of Mining and GeologyTNThu Phuong NguyenInstitute for Tropical Technology

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Implication

Experimental study demonstrates effective removal and recovery of heavy metals using hydroxyapatite adsorbent, indicating potential environmental benefits.

Key Points

  • The aim is to evaluate hydroxyapatite's effectiveness in removing copper and nickel ions from water and recovering them through electrochemical methods.
  • Synthesize hydroxyapatite for adsorption tests.
  • Investigate effects of pH, contact time, concentration, and adsorbent dosage on ion adsorption.
  • Analyze adsorption models and kinetics to understand ion removal.
  • Conduct metal recovery via electrodeposition in a deep eutectic solvent.
  • Achieved maximum adsorption capacities of 49.53 mg.g −1 for Cu 2+ and 12.15 mg.g −1 for Ni 2+.
  • Measured removal efficiencies of 99.06% for Cu 2+ and 80.99% for Ni 2+.
  • Desorption and recovery achieved 94.63% for copper and 94.80% for nickel.
  • Regenerated hydroxyapatite showed maintained adsorption capacity of 39.25 mg.g −1 for Cu 2+ and 11.18 mg.g −1 for Ni 2+.

Cite This Study

Le et al. (2026) studied this question.

synapsesocial.com/papers/69cb6526e6a8c024954b9382https://doi.org/10.1002/cplu.202500597
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Also Consider

Synapse has enriched one closely related paper. Consider it for comparative context:

  1. 1Heavy metal pollution in the environment and their toxicological effects on humans2020 · 4,405 citations