An excellent fluoride sorption behavior of ceramic adsorbent

Area of Science:

• Environmental Science
• Materials Science
• Water Chemistry

Background:

• Fluoride contamination in aqueous environments poses significant health risks.
• Developing efficient and cost-effective adsorbent materials is crucial for water purification.
• Ceramic-based materials show promise for adsorptive removal of contaminants.

Purpose of the Study:

• To evaluate the feasibility of a newly developed ceramic adsorbent for fluoride removal.
• To investigate the impact of key experimental parameters on fluoride adsorption efficiency.
• To determine the adsorption mechanism and capacity of the ceramic material.

Main Methods:

• Batch adsorption experiments were conducted to assess fluoride removal.
• The influence of contact time, initial fluoride concentration, and pH was studied.
• Sorption isotherms (Langmuir, Freundlich) and kinetic models (pseudo-second-order) were applied.
• The effect of competing anions (phosphate, carbonate, sulfate) was examined.

Main Results:

• The ceramic adsorbent demonstrated effective fluoride removal across a wide pH range (4.0-11.0).
• Adsorption followed both Langmuir and Freundlich isotherm models, with a maximum capacity of 2.16 mg/g.
• The pseudo-second-order kinetic model accurately described the sorption process.
• Phosphate, carbonate, and sulfate ions reduced fluoride adsorption efficiency.

Conclusions:

• The developed ceramic adsorbent exhibits significant potential for fluoride removal from aqueous environments.
• The material's performance is influenced by solution chemistry and competing ions.
• This ceramic adsorbent could form the basis for a viable water treatment technology.