Fluoride removal using a chelating resin containing phosphonic-sulfonic acid bifunctional group
Rong Li1, Xunan Tian1, Imtiaz Ashraf1
1School of Chemical Engineering, Northwest University, Taibai North Road 229, Xi'an, Shaanxi Province 710069, PR China.
Journal of Chromatography. A
|November 18, 2019
Summary
A novel chelating resin, S9570-Fe(III), effectively removes fluoride ions from water. This bifunctional resin shows superior adsorption compared to traditional resins, offering a promising new method for fluoride removal.
Area of Science:
- Environmental Chemistry
- Materials Science
Background:
- Fluoride contamination in water poses significant health risks.
- Conventional methods for fluoride removal often have limitations in efficiency and cost-effectiveness.
Purpose of the Study:
- To investigate the efficacy of S9570-Fe(III), a novel chelating resin, for fluoride removal from aqueous solutions.
- To compare the adsorption performance of S9570-Fe(III) with existing chelating resins.
Main Methods:
- Synthesis and characterization of S9570-Fe(III) resin with sulphonated monophosphonic acid bifunctional groups.
- Adsorption experiments to evaluate fluoride removal efficiency.
- Thermodynamic and kinetic studies to understand the adsorption mechanism.
Main Results:
- S9570-Fe(III) demonstrated superior fluoride adsorption compared to monofunctional resins (iminodiacetic acid, sulfonic acid, carboxylic acid).
- Adsorption is a spontaneous, endothermic process favorable at lower temperatures.
- Adsorption kinetics followed a pseudo-second-order model, indicating chemical sorption and intraparticle diffusion control.
Conclusions:
- S9570-Fe(III) is a highly effective chelating resin for fluoride removal.
- The bifunctional nature of the resin contributes to its enhanced adsorption capacity.
- This study presents a novel and efficient method for addressing fluoride contamination in water.
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