%0 Journal Article
%T Zeolite A synthesis employing a brazilian coal ash as the silicon and aluminum source and its applications in adsorption and pigment formulation
%A Bieseki
%A Lindiane
%A Penha
%A F¨¢bio Garcia
%A Pergher
%A Sibele Berenice Castell£¿
%J Materials Research
%D 2013
%I ABM, ABC, ABPol, SBCC, SBCr, SBMM, SBPMat
%R 10.1590/S1516-14392012005000144
%X zeolite a was synthesized using the coal ash from sider¨®polis/rs - brazil. the synthesis was based on a standard iza synthesis using coal ash as the si and al source. xrf analysis showed that the coal ash has a si/al ratio of 1.52, which is close to the si/al ratio required to produce zeolite a (1.0). the synthesized materials were analyzed by xrd, sem and n2 adsorption. more crystalline materials were obtained during synthesis when an additional treatment was applied at a temperature of 353 k at the dissolution of naoh step. the product formed after 4 hours was the most crystalline, but even the product formed after 1 hour proved to be better than that formed using the standard 4 hours iza synthesis. the zeolites synthesized by this method had an adsorption capacity of 120 mg.g-1 for ca2+, half the capacity of commercial zeolite a (300 mg.g-1). it was not possible to obtain blue or green pigments using the synthesized zeolite a.
%K zeolite a
%K coal ash
%K adsorption
%K pigment.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1516-14392013000100005&lng=en&nrm=iso&tlng=en