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Establishing two-stage interaction between fly ash and NaOH by X-ray and infrared analyses

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Title Establishing two-stage interaction between fly ash and NaOH by X-ray and infrared analyses
 
Creator JHA, B
KOSHY, N
SINGH, DN
 
Subject ZEOLITE SYNTHESIS
HYDROTHERMAL SYNTHESIS
REMOVAL
IONS
hydrothermal treatment
alkali activation
fly ash zeolites
X-ray diffraction (XRD) and Fourier transform-infrared radiation (FT-IR) spectroscopy
 
Description The interaction of the fly ash and NaOH, in an open reflux hydrothermal system at 100A degrees C, has been explored by several researchers and formation of fly ash zeolites has been confirmed based on the X-ray diffraction analysis of the residues. However, this method does not reveal much about the characteristic transitions (viz. elemental, electro-negativity and cation exchange capacity) of the residues. In this situation, resorting to Fourier transform-infrared radiation (FT-IR) spectroscopy on the residues obtained from two-stage hydrothermal treatment process, described in this manuscript, appears to be a novel idea to establish transitions in chemical bonds (viz., -Si-OH-Al-, OH-Na, OH-Al-), crystallinity and cation exchange capacity of these residues. Based on extensive studies, it has been demonstrated that FT-IR spectroscopy is extremely useful for 1) detection of chemical bonds in the residues, 2) evaluation of zeolites in the residues and 3) also establishing the superiority of the two-stage interaction of the fly ash with NaOH for synthesizing better fly ash zeolites (viz., Na-P1 and Hydroxysodalte) as compared to those obtained from the conventional single-stage treatment of the fly ash.
 
Publisher HIGHER EDUCATION PRESS
 
Date 2016-01-14T12:27:09Z
2016-01-14T12:27:09Z
2015
 
Type Article
 
Identifier FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING, 9(2)216-221
2095-2201
2095-221X
http://dx.doi.org/10.1007/s11783-014-0630-8
http://dspace.library.iitb.ac.in/jspui/handle/100/17495
 
Language en