CETMIC 05378
CENTRO DE TECNOLOGIA DE RECURSOS MINERALES Y CERAMICA
Unidad Ejecutora - UE
artículos
Título:
Influence of Thermal Treatment on Bentonite Used as Adsorbent for Cd, Pb, Zn
Autor/es:
SUSANA YAMILA MARTINEZ STAGNARO, CRISTINA VOLZONE, MÓNICA LUCIANA RUEDA
Revista:
MATERIALS RESEARCH
Editorial:
UNIV FED SAO CARLOS
Referencias:
Lugar: São Paulo; Año: 2012 vol. 15 p. 1 - 5
ISSN:
1516-1439
Resumen:
The retentions of Zn, Cd and Pb cations by one treated bentonite up to 750 °C were analyzed.
The retentions were evaluated by using mono-and poly-solute aqueous solutions of such cations. The
adsorptions were carried out in batch system at room temperature. The solid/liquid ratio was 2% wt.v?1.
The solids were characterized by X-ray diffraction, thermal and chemical analyses. The Zn cation
from mono- or polysolute-solutions was retained in higher amount than Cd and Pb cations in similar
solution types by bentonite. The retentions were effective up to 450 °C calcined bentonite, after that,
the retention capacity decreased in concordance with dehydroxylation of the structure of clay minerals.?1.
The solids were characterized by X-ray diffraction, thermal and chemical analyses. The Zn cation
from mono- or polysolute-solutions was retained in higher amount than Cd and Pb cations in similar
solution types by bentonite. The retentions were effective up to 450 °C calcined bentonite, after that,
the retention capacity decreased in concordance with dehydroxylation of the structure of clay minerals.
