Abstract
AbstractCoal 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 (FZSH) 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 FZSH zeolite. The sorption behavior of Pb2+ and Cd2+ towards commercial Mordenite and FZSH Mordenite type zeolite is investigated and compared. Percentage uptake obtained using FZSH and commercial Mordenite zeolite sorbent was found quite similar. The kinetic and thermodynamic studies reveal the favourable and spontaneous nature of the sorption.
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