Activated Alumina Granules with nanoscale porosity for water defluoridation
| Autor: | S.J. Dhoble, R. M. Belekar |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Aqueous solution
Materials science technology industry and agriculture Activated alumina 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Grain size 0104 chemical sciences Amorphous solid chemistry.chemical_compound Adsorption Chemical engineering chemistry General Materials Science Physical and Theoretical Chemistry 0210 nano-technology Porosity Fluoride BET theory |
| Zdroj: | Nano-Structures & Nano-Objects. 16:322-328 |
| ISSN: | 2352-507X |
| DOI: | 10.1016/j.nanoso.2018.09.007 |
| Popis: | Highly porous alumina granules have been processed by virtue of modified sol–gel method. Activated alumina (AA) granules were obtained through hydrolysis of aluminum nitrate controlled by ammonia in aqueous media and granules were formed in ammonia–paraffin oil bath. The prepared granules were found to be consisting of high porosity amorphous γ - alumina particles which were characterized by XRD, SEM, TEM, FT-IR and Brunauer–Emmett–Teller (BET) techniques. The material prepared via this method were found to be composed of nano-particles with an average grain size of 30 nm and a large BET surface area 447 m2/g which is very high compared with commercial alumina available in the market. The fluoride removal capacity of prepared granules with variation of fluoride dose has also been studied by employing AA in domestic candle type filters. It also shows better regeneration and reusability after ten cycles of usage. Fluoride removal from aqueous solution in continuous mode depends on adsorbent doses and initial concentration of fluoride. |
| Databáze: | OpenAIRE |
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