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Synthesis and Characterization of Modified Coal Fly Ash (MCFA) as an Adsorbent from Coal Fly Ash (CFA)

Author Affiliations

  • 1University Institute of Chemical Technology, North Maharashtra University, Jalgaon, Maharashtra State, India
  • 2University Institute of Chemical Technology, North Maharashtra University, Jalgaon, Maharashtra State, India

Res. J. Material Sci., Volume 4, Issue (7), Pages 6-14, August,16 (2016)


CFA is the waste generated from Thermal Power Plants which is recognized as byproduct of it. Huge amount of CFA is generated worldwide as compared to its utilization. CFA can be utilize by modifying it as an adsorbent as modified coal fly ash (MCFA). In this paper synthesis of MCFA and its characterization is described. MCFA is synthesized by treating CFA with 5N NaOH at 800C for 48 hours with continuous stirring. MCFA is analyzed by SEM, FTIR, XRD and XRF for characterization of different parameters like surface morphology, chemical bonding, phase identification and chemical composition etc. SEM micrograph of MCFA is seen with large gelatinous mass formed due to the breaking and dissolution of alumino-silicate phases modifying the surface morphology greatly. XRD pattern shows the intensity of the quartz is more in MCF than CFA. FTIR spectra observed shaper at band length of 1058 cm-1 in MCFA which indicates more crystallization and higher absorbance than CFA. In XRF analysis, it was observed that the MCFA consists of 44.63% SiO2 and 43.72% Al2O3 which are the main constituents of the zeolites. Al2O3 percentage is increased from 26 to 43.72 in MCFA which indicates the zeolitisation of CFA. Also it was observed that SiO2 percentage is reduced from 61 to 44.63. Increased amount of Na2O (0.620) in MCFA was observed because of the alkali treatment of CFA.


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