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Title: Synthesis and characterization of LTA nanozeolite using barley husk silica: Mercury removal from standard and real solutions

Abstract

Highlights: ► Silica extraction from barley husk with high purity for the synthesis of A nanozeolite. ► Free template A nanozeolite synthesized via new source of silica at low temperature. ► Optimization of SiO{sub 2}/Al{sub 2}O{sub 3}, Na{sub 2}O/SiO{sub 2} ratios, temperature and time of the synthesis. ► Utilizing of synthesized A nanozeolite for mercury removal from aqueous solutions. ► Mercury removal at optimized pH, contact time and adsorbent dose from real solution. - Abstract: In this study, synthesized Lined Type A (LTA) nanozeolite from barley husk silica (BHS) was used for mercury removal from standard and real aqueous solutions. The BHS in amorphous phase with 80% purity was extracted from barley husk ash (BHA), and used effectively as a new source of silica for the synthesis of NaA nanozeolite. The NaA nanocrystal in pure phase has been synthesized at low temperature, without adding any organic additives. The effects of heating time, reaction temperature, SiO{sub 2}/Al{sub 2}O{sub 3}, and Na{sub 2}O/SiO{sub 2} mole ratios on the crystallization of NaA nanozeolite were studied. The adsorption capacity of mercury (II) was studied as a function of pH, contact time, and amount of adsorbent. The crystallization of NaA nanozeolite from BHS was characterizedmore » by X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), Brunauer–Emmett–Teller (BET), and FTIR techniques. Moreover, concentration of Hg{sup 2+} ions in the aqueous solutions was analyzed by hydride generation atomic absorption spectroscopy method (HG-AAS). The standard and real samples analysis showed that NaA nanozeolite is capable of Hg{sup 2+} ions removal from the aqueous solutions. Efficiency of mercury (II) adsorption from real solutions onto the nano-sized NaA zeolite was 98%.« less

Authors:
 [1]
  1. Analytical Division, Faculty of Chemistry, University of Mazandaran, P.O. Box: 47416-95447, Babolsar (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22290415
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 48; Journal Issue: 5; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; AQUEOUS SOLUTIONS; BARLEY; CRYSTALLIZATION; MERCURY; MERCURY IONS; NANOSTRUCTURES; NEUTRON ACTIVATION ANALYSIS; SCANNING ELECTRON MICROSCOPY; SILICA; SILICON OXIDES; SODIUM OXIDES; SOL-GEL PROCESS; SYNTHESIS; X-RAY DIFFRACTION; X-RAY FLUORESCENCE ANALYSIS; ZEOLITES

Citation Formats

Azizi, Seyed Naser, E-mail: azizi@umz.ac.ir, Dehnavi, Ahmad Roozbehani, E-mail: Roozbehanisulfur@yahoo.com, and Joorabdoozha, Amir. Synthesis and characterization of LTA nanozeolite using barley husk silica: Mercury removal from standard and real solutions. United States: N. p., 2013. Web. doi:10.1016/J.MATERRESBULL.2012.12.068.
Azizi, Seyed Naser, E-mail: azizi@umz.ac.ir, Dehnavi, Ahmad Roozbehani, E-mail: Roozbehanisulfur@yahoo.com, & Joorabdoozha, Amir. Synthesis and characterization of LTA nanozeolite using barley husk silica: Mercury removal from standard and real solutions. United States. doi:10.1016/J.MATERRESBULL.2012.12.068.
Azizi, Seyed Naser, E-mail: azizi@umz.ac.ir, Dehnavi, Ahmad Roozbehani, E-mail: Roozbehanisulfur@yahoo.com, and Joorabdoozha, Amir. Wed . "Synthesis and characterization of LTA nanozeolite using barley husk silica: Mercury removal from standard and real solutions". United States. doi:10.1016/J.MATERRESBULL.2012.12.068.
@article{osti_22290415,
title = {Synthesis and characterization of LTA nanozeolite using barley husk silica: Mercury removal from standard and real solutions},
author = {Azizi, Seyed Naser, E-mail: azizi@umz.ac.ir and Dehnavi, Ahmad Roozbehani, E-mail: Roozbehanisulfur@yahoo.com and Joorabdoozha, Amir},
abstractNote = {Highlights: ► Silica extraction from barley husk with high purity for the synthesis of A nanozeolite. ► Free template A nanozeolite synthesized via new source of silica at low temperature. ► Optimization of SiO{sub 2}/Al{sub 2}O{sub 3}, Na{sub 2}O/SiO{sub 2} ratios, temperature and time of the synthesis. ► Utilizing of synthesized A nanozeolite for mercury removal from aqueous solutions. ► Mercury removal at optimized pH, contact time and adsorbent dose from real solution. - Abstract: In this study, synthesized Lined Type A (LTA) nanozeolite from barley husk silica (BHS) was used for mercury removal from standard and real aqueous solutions. The BHS in amorphous phase with 80% purity was extracted from barley husk ash (BHA), and used effectively as a new source of silica for the synthesis of NaA nanozeolite. The NaA nanocrystal in pure phase has been synthesized at low temperature, without adding any organic additives. The effects of heating time, reaction temperature, SiO{sub 2}/Al{sub 2}O{sub 3}, and Na{sub 2}O/SiO{sub 2} mole ratios on the crystallization of NaA nanozeolite were studied. The adsorption capacity of mercury (II) was studied as a function of pH, contact time, and amount of adsorbent. The crystallization of NaA nanozeolite from BHS was characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), Brunauer–Emmett–Teller (BET), and FTIR techniques. Moreover, concentration of Hg{sup 2+} ions in the aqueous solutions was analyzed by hydride generation atomic absorption spectroscopy method (HG-AAS). The standard and real samples analysis showed that NaA nanozeolite is capable of Hg{sup 2+} ions removal from the aqueous solutions. Efficiency of mercury (II) adsorption from real solutions onto the nano-sized NaA zeolite was 98%.},
doi = {10.1016/J.MATERRESBULL.2012.12.068},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 5,
volume = 48,
place = {United States},
year = {2013},
month = {5}
}