INVESTIGADORES
ILLANES Cristian Omar
artículos
Título:
Kinetic sorption of Cr(VI) into solvent impregnated porous microspheres
Autor/es:
C. ILLANES; N.A. OCHOA; J. MARCHESE
Revista:
CHEMICAL ENGINEERING JOURNAL
Editorial:
ELSEVIER
Referencias:
Año: 2008 vol. 136 p. 92 - 98
ISSN:
1385-8947
Resumen:
The sorption rates of Cr(VI) ion from acid chromate solutions with
Aliquat 336 impregnated microspheres (MS) were examined. MS of
polysulfone (PSf) and poly(styrene-acrylenitrile) (SAN) were prepared
by phase inversion process. The MS obtained have different size and
morphology. The sorption behavior and the rate-controlling sorption
step have been discussed from the Elovich equation, pseudo-second order
and Crank kinetic models. Even all models gave satisfactory
correlations with the experimental data, the Crank model showed to be
more realistic and appropriate to interpret the Cr(VI) kinetic sorption
results. These analysis indicate that the intraparticle solute
diffusion is the rate-controlling sorption step, and suggest that there
is a surface diffusion contribution to the overall Cr(VI) mass
transport inside the MS which is more important as the MS pore size
decreases.