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Title: Development of Simple Method for Preparation of Mesoporous Alumina Based Adsorbents and Their Application in Removal of Fluoride Ion from Water
Researcher: DAYANANDA D
Guide(s): Narendra Nath Ghosh
Keywords: Mesoporous Alumina Based Adsorbents,
Removal of Fluoride Ion from Water
Simple Method for Preparation,
University: Birla Institute of Technology and Science
Completed Date: 1-8-2015
Abstract: Though it is a well known fact that a significant portion of human population all around the world is suffering from consumption of fluoride contaminated ground water, but to date defluoridation of drinking water is a major challenge. Several techniques have been invented for this purpose which are capable of removing F- from water at various contamination levels. Amongst these techniques, adsorption based methods are found to be more convenient and cost effective. Most commonly used adsorbent for defluoridation of water is either activated Al2O3 or Al2O3 based materials. Activated alumina is extensively used adsorbent for defluoridation of drinking water because of its high affinity and selectivity for F- ions. In this research work, an aqueous solution based cost effective chemical method has been developed for preparation of mesoporous Al2O3, and ZrO2, MgO and CaO nanoparticle loaded mesoporous Al2O3. The synthesized adsorbents were characterized using powder X-ray diffractometer (XRD), N2 adsorption-desorption surface area and pore size analyzer and High Resolution Transmission Electron Microscope (HRTEM). The synthesized adsorbents have been thoroughly investigated for the adsorption of F- by batch adsorption method. Investigations on the effect of various processing parameters (such as composition of adsorbents, contact time, initial pH of the solution, adsorbent dose and initial F- concentration of the solution) on F- adsorption property of synthesized materials were performed. newlineSynthesized mesoporous Al2O3 showed more F- adsorption capacity than commercial Al2O3. Incorporation of metal oxide nanoparticle (ZrO2, MgO and CaO) enhanced the F- adsorption capacity of mesoporous Al2O3. CaO nanoparticle loaded mesoporous Al2O3 showed faster kinetics as well as higher F- adsorption capacity. The maximum F- adsorption capacity of CaO nanoparticle loaded mesoporous Al2O3 was 137 mg g-1 and exhibited good F- removal efficiency over a wide range of pH. Kinetic data revealed that, fluoride sorption on 20 wt.% CaO loade
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Appears in Departments:Chemistry

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