Journal
CHEMICAL ENGINEERING JOURNAL
Volume 248, Issue -, Pages 430-439Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2014.03.064
Keywords
Mesoporous alumina; Calcium oxide; Fluoride removal; Adsorption isotherm; Adsorption kinetics
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Funding
- Board of Research in Nuclear Science (BRNS), India [2010/37C/2/BRNS/827]
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In this paper, we report a simple chemical method for the preparation of CaO loaded mesoporous Al2O3 based adsorbents, which can be used for fluoride removal from water. The synthesized adsorbents were characterized by using powder X-ray diffractometer, N-2 adsorption-desorption surface area and pore size analyzer and high resolution transmission electron microscope. CaO loaded mesoporous aluminas exhibited poor crystalline mesoporous structure having gamma-Al2O3 phase. The fluoride removal capacities of the synthesized adsorbents were evaluated using batch adsorption studies. Kinetic data revealed that, the fluoride sorption on 20 wt.% CaO loaded mesoporous Al203 was rapid, and similar to 90% fluoride removal was achieved within 15 min. CaO loaded mesoporous Al2O3 showed higher fluoride adsorption capacity (137 mg/g) and faster kinetics than mesoporous Al2O3. (C) 2014 Elsevier B.V. All rights reserved.
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