[Fluoride adsorption form drinking water by granular lanthanum alginate]
Ya-Kun Huo1, Wen-Ming Ding, Xia Huang
1College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China. huoyakun@126.com
Huan Jing Ke Xue= Huanjing Kexue
|January 22, 2011
Summary
Lanthanum alginate effectively removes fluoride from drinking water, with optimal performance at pH 4. This ion-exchange material shows a high adsorption capacity of 197.2 mg/g, making it a promising solution for water purification.
Area of Science:
- Materials Science
- Environmental Chemistry
- Water Treatment
Context:
- Fluoride contamination in drinking water poses significant health risks.
- Effective and efficient methods for fluoride removal are crucial for public health.
- Development of novel adsorbents is an active area of research in water purification.
Purpose:
- To synthesize granular lanthanum alginate for fluoride removal.
- To investigate the adsorption performance of lanthanum alginate.
- To understand the adsorption mechanism and influencing factors.
Summary:
- Granular lanthanum alginate was prepared and characterized for fluoride removal.
- Adsorption kinetics followed a pseudo-second-order model, and isotherms fitted the Langmuir equation with a maximum capacity of 197.2 mg/g.
- Optimal adsorption occurred at pH 4, with significant effects from disturbing ions like phosphate and carbonate. Ion exchange was identified as the primary mechanism.
Impact:
- Demonstrates the potential of lanthanum alginate as a highly effective adsorbent for fluoride removal.
- Provides insights into the factors influencing fluoride adsorption, aiding in process optimization.
- Offers a sustainable solution for improving the quality of drinking water by reducing fluoride levels.
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