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Lanthanum Cerate Microspheres for Efficient Fluoride Removal from Wastewater
Satish Kumar Singh1, Souman Pahi1, Abhijit Behera1
1Department of Chemistry, National Institute of Technology, Rourkela 769008, India.
Langmuir : the ACS Journal of Surfaces and Colloids
|January 29, 2024
Summary
Lanthanum cerate microspheres (LCM) demonstrate superior fluoride removal, achieving a high adsorption capacity of 104.83 mg/g. This novel adsorbent is effective in real groundwater across a wide pH range.
Area of Science:
- Materials Science
- Environmental Chemistry
- Water Treatment
Background:
- Fluoride contamination in water poses significant health risks.
- Developing efficient and cost-effective adsorbents for fluoride removal is crucial.
- Lanthanum cerate microspheres (LCM) have emerged as a promising material for water purification.
Purpose of the Study:
- To synthesize and characterize lanthanum cerate microspheres (LCM) for fluoride removal.
- To evaluate the adsorption performance and mechanism of LCM for fluoride.
- To assess the practical applicability of LCM in real groundwater.
Main Methods:
- Hydrothermal synthesis of lanthanum cerate microspheres (LCM).
- Batch adsorption experiments to determine optimal conditions (pH, initial concentration).
- Adsorption isotherm studies (Langmuir and Freundlich models).
- Characterization using SEM and TEM.
- Analysis of interference from co-existing anions.
Main Results:
- LCM exhibited a spherical morphology confirmed by SEM and TEM.
- Optimal adsorption occurred within a pH range of 3.5-4.5.
- The Langmuir model best described the adsorption isotherm.
- A maximum Langmuir adsorption capacity of 104.83 mg/g was achieved at pH 4.0.
- LCM demonstrated high fluoride removal efficiency in actual groundwater samples.
Conclusions:
- Lanthanum cerate microspheres are highly effective adsorbents for fluoride removal.
- The adsorption process is best described by the Langmuir model.
- LCM shows significant potential for practical application in treating fluoride-contaminated water.
- The material's performance in real groundwater highlights its viability for water purification.
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