Zeolite A synthesis employing a brazilian coal ash as the silicon and aluminum source and its applications in adsorption and pigment formulation

AUTOR(ES)

Bieseki, Lindiane, Penha, Fábio Garcia, Pergher, Sibele Berenice Castellã

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

26/10/2012

RESUMO

Zeolite A was synthesized using the coal ash from Siderópolis/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.

Documentos Relacionados

• Synthesis and characterization of zeolite NaP using kaolin waste as a source of silicon and aluminum
• The influence of separately and combined bentonite and kaolinite as binders for pelletization of NaA zeolite from coal fly ash
• Adsorção de corantes aniônicos de solução aquosa em cinza leve de carvão e zeólita de cinza leve de carvão
• Rice Husk Ash as Raw Material for the Synthesis of Silicon and Potassium Slow-Release Fertilizer
• Adsorption of Rhodococcus Strain GIN-1 (NCIMB 40340) on Titanium Dioxide and Coal Fly Ash Particles