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Mordenite‐Type Zeolite from Waste Coal Fly Ash: Synthesis, Characterization and Its Application as a Sorbent in Metal Ions Removal
Author(s) -
Lankapati Henilkumar M.,
Lathiya Dharmesh R.,
Choudhary Lalita,
Dalai Ajay K.,
Maheria Kalpana C.
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201903715
Subject(s) - fly ash , mordenite , zeolite , sorbent , sorption , materials science , coal , chemical engineering , waste management , coal combustion products , nuclear chemistry , inorganic chemistry , chemistry , adsorption , organic chemistry , catalysis , composite material , engineering
Coal fly ash is a waste, obtained from the combustion of coal in thermal power plants. Fly ash is harmful and its disposal is the major issue from an environmental point of view. As fly ash contains silica and alumina, it is thought of interest to use it for the synthesis of porous material like zeolite. In this work, the focus is on the utilization of fly ash for the synthesis of Mordenite type zeolite and its application in the toxic metals removal from aqueous solution. Coal fly ash based Mordenite type zeolite (FZS H ) was synthesized by seed assisted hydrothermal synthetic method using fly ash as a source of silica and alumina instead of using pure silica and alumina. The resultant material was characterized by various techniques, such as SEM‐EDX, XRD, TGA, FT‐IR, solid state NMR, BET surface area, etc. The XRD patterns confirm the presence of Mordenite phase in the FZS H zeolite. The sorption behavior of Pb 2+ and Cd 2+ towards commercial Mordenite and FZS H Mordenite type zeolite is investigated and compared. Percentage uptake obtained using FZS H and commercial Mordenite zeolite sorbent was found quite similar. The kinetic and thermodynamic studies reveal the favourable and spontaneous nature of the sorption.