Due to their availability and
low cost, zeolites have found an important role in adsorption applications. In
this study, a natural zeolite, clinoptilolite, was investigated as an adsorbent
to remove basic dyes (methylene blue and rhodamine B) from aqueous solution by
using batch experiment system. The natural zeolite used in
this experiment is mainly composed of clinoptiloite, quartz and heulandite and
has cation-exchange capacity of 2.76meq.g-1. Parameters affecting adsorption mechanism such as initial concentration
of dyes (50–300mg/l) and contact time (10–325 minutes) on the dye adsorption
was examined. From the obtained data it was observed that the
natural zeolite presented higher adsorption capacity for methylene blue than
rhodamine B with the maximal adsorption capacity of 10.776mg.g-1 and
7.348mg.g-1 at 250C for methylene blue and rhodamine B respectively. The adsorption rate data were analyzed according to pseudo-first-order
and pseudo-second-order kinetic models. Kinetic evaluation indicated that the
basic dye adsorption on natural clinoptilolite followed the pseudo-second-order
model.
Subjects | Engineering |
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Journal Section | Articles |
Authors | |
Publication Date | July 6, 2017 |
Published in Issue | Year 2017 Volume: 12 Issue: 3 |