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Related Experiment Video

Updated: Sep 13, 2025

Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material
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Lithium Adsorption Using Graphene Oxide: Modeling, Regeneration, and Mechanistic Insights.

Abdulrahman Abu-Nada1, Ahmed Abdala2, Gordon McKay1

  • 1Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Doha, Qatar.

Materials (Basel, Switzerland)
|July 30, 2025
PubMed
Summary

Graphene oxide effectively removes lithium ions from water, reaching a high adsorption capacity of 179 mg/g. This reusable material shows promise for sustainable lithium recovery and wastewater treatment.

Keywords:
graphene oxidekinetic processeslithium removalregenerationsorption equilibrium

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Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Chemical Engineering

Background:

  • Lithium is a critical element for energy storage, but its recovery from aqueous solutions, particularly wastewater, presents challenges.
  • Graphene oxide (GO) is a promising adsorbent due to its unique properties and functional groups.
  • Developing efficient and sustainable methods for lithium-ion removal is crucial for resource management and environmental protection.

Purpose of the Study:

  • To synthesize graphene oxide (GO) using the Hummers method.
  • To evaluate GO's performance for lithium-ion removal from aqueous solutions.
  • To investigate the adsorption kinetics, equilibrium, and regeneration capabilities of GO.

Main Methods:

  • Graphene oxide (GO) synthesis via the Hummers method.
  • Material characterization using XPS, FTIR, FE-SEM, XRD, and BET analysis.
  • Lithium adsorption experiments under varying conditions, followed by kinetic and isotherm modeling.

Main Results:

  • Characterization confirmed GO's porous structure (232 m²/g surface area, 0.4 cm³/g pore volume) and the presence of active oxygen-containing functional groups.
  • Optimal lithium adsorption capacity reached 179 mg/g, following pseudo-second-order kinetics and Redlich-Peterson isotherm.
  • Adsorption efficiency was sensitive to pH and salinity; HNO₃ proved effective for regeneration, allowing multiple reuse cycles with minimal capacity loss.

Conclusions:

  • Graphene oxide demonstrates high efficiency and capacity for lithium-ion removal from aqueous solutions.
  • GO is a suitable material for wastewater treatment and sustainable lithium recovery, aligning with circular economy principles.
  • The recyclability and reusability of GO underscore its potential for environmental remediation and resource management.