Optimization of cation-doped nano-hydroxyapatite in combination with amorphous aluminum hydroxide for defluoridation
| العنوان: | Optimization of cation-doped nano-hydroxyapatite in combination with amorphous aluminum hydroxide for defluoridation |
|---|---|
| المؤلفون: | Belliraj Siva Kumar, Chelli Sai Manohar, Agman Gupta |
| المصدر: | Water Supply. 19:1686-1694 |
| بيانات النشر: | IWA Publishing, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Materials science, Doping, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Amorphous solid, chemistry.chemical_compound, chemistry, Nano hydroxyapatite, Chemical engineering, Aluminium, Hydroxide, 0210 nano-technology, Water Science and Technology |
| الوصف: | Given widespread fluoride in the ground water, there is a need for effective defluoridation in several geographical areas. In this regard, we explored heavily doped cationic nano-composites of hydroxyapatite (HA) given its surface chemistry for adsorption of the specific anion. We synthesized and extensively characterized HA nano-rods (HA-NR), Al/Mg-HA nanocomposites and amorphous aluminum hydroxide, and optimized their efficient defluoridation. The kinetics and thermodynamics of adsorption were further evaluated to establish the mechanistic rationale and its spontaneity. We report the optimized ideal adsorbents for the near-total removal of fluoride that demonstrated 99.99% and 99.98% efficiency with adsorption capacities of 83.3 and 81.3mg/g respectively. The adsorbent composites were (Mg-HA)-Al(OH)3 and (HA-NR)-Al(OH)3 in 1:1 ratio. The optimal conditions for defluoridation were 25mg of adsorbent in 25ml (10mg/L) fluoride solution at room temperature agitated for 10h in the pH range of 4.88–7.20. |
| تدمد: | 1607-0798 1606-9749 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::f76f384bc6312fd24bdd16bafc03b6b9Test https://doi.org/10.2166/ws.2019.041Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi...........f76f384bc6312fd24bdd16bafc03b6b9 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 16070798 16069749 |
|---|