Abstract:
The fly ash generated from
a Romanian power plant was used as a
starting material in this study. The aim of
the study was to obtain a low cost
material based on the treatment of fly ash
with Fe3O4 for utilization as an adsorbent
for cadmium ion removal. The adsorbent
that was synthesized was characterized
using different techniques. The adsorption
process was investigated by the batch
technique at room temperature. The
quantity of cadmium ion adsorbed was
measured spectrophotometrically. The
experimental data showed that the
material can remove cadmium ions at all
three working concentrations. The
adsorption capacity increased with an
increase in concentration, respectively
contact time. The results were analyzed
through two kinetic models: pseudo first
order and pseudo second order. The
kinetics results of cadmium adsorption
onto a magnetic material are in good
agreement with a pseudo second order
model, with a maximum adsorption
capacity of 4.03 mg/g, 6.73 mg/g, and
9.65 mg/g. Additionally, the pseudo
second order model was linearized into its
four types. The results indicated that the
material obtained show the ability to
remove cadmium ions from an aqueous
solution.
