期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 6, 期 1, 页码 906-916出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2018.01.014
关键词
De-fluoridation; Activated red mud; Zinc-alginate beads; Surface morphological studies; Regeneration; Applications
资金
- Ministry of Environment & Forests (MOEF), New Delhi
Beads prepared by entrapping H2O2-treated fine red mud in the zinc-alginate (RMZAB), are investigated as adsorbent for their sorption nature towards the fluoride ions from water. De-fluoridation ability is found to be: 0.72 mg/g at optimum extraction conditions. The immobilization of the activated red mud in the zinc-alginate beads has facilitated the easy filtration in addition to the enhancement of sorption characteristics. Surface morphological investigations, analysis of nature and kinetics of adsorption and thermodynamical studies are carried out. Sorption nature is not lost even after ten times of regeneration and by repetitive use of the RMZAB, complete de-fluoridation is achieved.
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