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Synthesis of Zeolites Using the ADOR (Assembly-Disassembly-Organization-Reassembly) Route
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Published on: April 3, 2016

Thallium Removal from Aqueous Solutions Using L Zeolite: Structural Modifications, Cation Distribution and Water

Luca Adami1, Maura Mancinelli1, Francesco Di Benedetto1

  • 1Department of Physics and Earth Sciences, University of Ferrara, Via Saragat 1, 44122 Ferrara, Italy.

Molecules (Basel, Switzerland)
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

Potassium-L zeolite effectively removes thallium ions from water by exchanging cations and undergoing structural changes. This adsorbent shows high efficiency and capacity for thallium remediation.

Keywords:
K-L zeoliteadsorption behaviourhydration networkion exchangestructural modificationsthallium removalwater network reorganisation

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Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Inorganic Chemistry

Background:

  • Thallium contamination in water poses significant environmental and health risks.
  • Zeolites are crystalline aluminosilicates with potential for ion exchange and adsorption.
  • Potassium-L zeolite (K-L) is explored for its efficacy in removing heavy metal ions.

Purpose of the Study:

  • To investigate potassium-L zeolite (K-L) as an adsorbent for thallium (Tl+) removal.
  • To understand the relationship between cation exchange and structural response in K-L zeolite during Tl+ uptake.
  • To evaluate the adsorption performance and capacity of K-L zeolite for Tl+.

Main Methods:

  • X-ray powder diffraction (XRPD) and Rietveld refinements for structural analysis.
  • Thermal analysis to monitor structural modifications.
  • Batch adsorption experiments to assess removal efficiency and kinetics.
  • Langmuir model fitting to determine adsorption capacity.

Main Results:

  • K-L zeolite demonstrates rapid Tl+ uptake kinetics, reaching equilibrium within minutes.
  • High removal efficiency of up to 99.5% for thallium was achieved.
  • Structural analysis revealed Tl+ substitution for K+ and framework expansion, with specific site preference.
  • Adsorption data fitted the Langmuir model, indicating a maximum adsorption capacity of 631 mg g-1.

Conclusions:

  • K-L zeolite exhibits excellent performance for thallium removal from aqueous solutions.
  • The study highlights the interplay between ion exchange and structural flexibility in K-L zeolite.
  • K-L zeolite shows significant potential for practical application in treating thallium-contaminated water.