Résumé:
The objective of this study is the depollution of contaminated water by a new generation of
flexible and magnetic gelled beads based on sodium alginate, iron-bridged clay, ferrofluid
and/or iron (oxy)hydroxides
The prepared beads were characterized by physicochemical (diameter, density, pHPZC),
diffractometric and X-ray fluorescence (XRD, FX) methods for Fourier transform infrared
spectroscopic (FTIR) mineralogical analysis to identify chemical bonds and scanning electron
microscopy (SEM) to determine morphology.
The adsorption modeling parameters of Pb and/or Cd were determined in simple singlecomponent
systems
then
in
competition
with
methyl
green
(VM)
dye.
The
study
is
carried
out
by
varying
the
molar
ratio
(Cd/VM)
and/or
(Pb/VM)
on
alginate
beads
based
on
iron-bridged
Algerian
montmorillonite
and
ferrofluids
(FF).
In
simple
single-component
systems,
the
adsorption
kinetics
of
VM
and
Cd
are
second
order
while
that of
Pb is first
order.
Modeling
by Langmuir and Freundlich models show that Langmuir model adapts better to
experimental results with very high adjustment coefficients (R2≥…).
