Defluoridation of water by chemical impregnated Artocarpus hirsutus sawdust
| Autor: | C. Anandbabu, P. Dhanasekaran, P. M. Satya Sai, K. K. Rajan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Pore size
021110 strategic defence & security studies Chromatography Artocarpus hirsutus biology Chemistry 0211 other engineering and technologies Activated alumina 02 engineering and technology 010501 environmental sciences biology.organism_classification 01 natural sciences Adsorption visual_art Fluoride adsorption visual_art.visual_art_medium Ferric hydroxide Sewage treatment Sawdust 0105 earth and related environmental sciences Water Science and Technology Nuclear chemistry |
| Zdroj: | Water Supply. 16:1297-1312 |
| ISSN: | 1607-0798 1606-9749 |
| DOI: | 10.2166/ws.2016.032 |
| Popis: | Sawdust of Artocarpus hirsutus impregnated with ferric hydroxide and activated alumina (SFAA) has been studied for defluoridation of water. This paper presents a detailed surface characterization of the adsorbent by studying pore size distribution and surface morphology. By combining the constituents in the right proportion, an adsorbent with a well-developed pore size distribution could be synthesized. The effects of various parameters on fluoride adsorption by SFAA are investigated. The adsorption capacity of SFAA is considerably higher than that of many adsorbents including activated alumina. More importantly, the adsorption capacity remains unchanged for the pH range of 1 to 9, which also makes it attractive for wastewater treatment. Besides a higher efficiency supported by the results of column studies, this adsorbent is economic as the sawdust constitutes 40% by weight of the total adsorbent. Kinetic studies indicate that fluoride adsorption on SFAA follows pseudo second-order model. Breakthrough adsorption capacity of SFAA is 1.21 mg/g, as compared with 0.41 mg/g for activated alumina. |
| Databáze: | OpenAIRE |
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