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Application of zeolitic material synthesised from fly ash to the decontamination of waste water and flue gas
Author(s) -
Querol X,
Moreno N,
Umaña J C,
Juan R,
Hernández S,
FernandezPereira C,
Ayora C,
Janssen M,
GarcíaMartínez J,
LinaresSolano A,
CazorlaAmoros D
Publication year - 2002
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.597
Subject(s) - fly ash , sorption , zeolite , human decontamination , flue gas , ion exchange , chemistry , waste management , ammonium , nuclear chemistry , materials science , adsorption , organic chemistry , ion , catalysis , engineering
Abstract Zeolitic material was synthesised from fly ash using two different conversion methodologies. The two conversion products obtained were: (a) impure zeolitic material obtained by direct conversion from different Spanish fly ashes, and (b) a high purity 4A–X zeolite blend synthesised from the silica extracts obtained from the Meirama fly ash (NW Spain). The zeolitic material was tested for potential application as an ion exchanger to decontaminate waters containing high concentrations of ammonium and heavy metals. Preliminary results show high cation uptake efficiencies (up to 4.7 meq g −1 ) which allowed fast decontamination of different types of industrial or acidic mine waste waters. The CO 2 , SO 2 and NH 3 sorption capacity of several zeolitic products was also determined and very promising results were obtained for the A4–X blend. Sorption capacity values of up to 74, 297, and 111 mg g −1 for CO 2 , SO 2 and NH 3 respectively were obtained for the zeolitic material synthesised from silica extracts from fly ash and a high‐aluminate waste water. © 2002 Society of Chemical Industry