Chitosan modified diatomite cross-linked with sodium alginate and polyethyleneimine composite gel particles for efficient removal of copper and lead ions
Abstract
This
study
involved
the
synthesis
of
a
novel
composite
gel
consisting
chitosan
modified
diatomite
(DE/CS),
sodium
alginate
(SA),
and
polyethyleneimine
(PEI)
(DE/CS-PEI@SA)
using
ion
crosslinking
method.
The
micro
characteristics
gels
were
examined
through
scanning
electron
microscopy,
X-ray
diffraction,
differential
calorimetry/thermal
gravimetric
analysis,
Brunauer-Emmett-Teller
systems.
Their
adsorption
properties
mechanisms
towards
copper
Cu(II)
lead
Pb(II)
ions
investigated
infrared,
photoelectron
spectroscopy,
energy
dispersive
Zeta
potential
analyses.
DE/CS-PEI@SA
exhibit
numerous
uniform
folds
on
its
surface,
boasting
specific
surface
area
18.96
m2/g
pore
size
ranging
from
1.5
to
80.0
nm,
demonstrating
robust
thermal
stability
pre-
post-
adsorption.
Notably,
these
demonstrate
impressive
capacities
for
(174.39
mg/g)
(295.04
mg/g),
respectively.
integration
DE/CS
PEI
within
contributes
complex
structure
multitude
accessible.
behavior
is
accurately
characterized
by
pseudo-second-order
kinetic
model
Langmuir
model.
predominant
mechanism
involves
single-molecule
chemisorption,
involving
coordination
adsorption,
exchange,
electrostatic
attraction.
demonstrates
notable
efficiency
in
cost-effectiveness,
ease
separation,
rendering
it
viable
option
wastewater
treatment
applications.
Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 10, 2024
Language: Английский
