Research Square (Research Square),
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 21, 2025
Abstract
This
study
created
a
zirconium-based
MOF
(UiO-66-NH2)
with
thiol
groups
attached
to
its
magnetic
corn
surface
for
adsorption
and
extraction
of
Au(III)
from
electronic
waste.
Characterization
the
composite
was
verified
using
FTIR,
XRD,
FESEM,
TGA
BET
techniques.
The
temperature,
period,
pH
on
were
investigated.
solutions
significantly
impacts
adsorption,
6.0
being
optimal
value.
optimum
conditions
50
◦C,
40
min,
10
mg
adsorbent.
Moreover,
functionalized
oxidized
corncobs
(OCBS@Fe3O4@UiO-66-SH)
showed
notable
ability
adsorb
1587
mg/g
capacity.
With
mass
ratios
competing
ions
(Mg,
Mn,
Cu,
Zn,
Co,
Cd,
Ni)
fixed
at
1:1
or
extended
1:5,
this
adsorbent
prefers
while
showing
negligible
other
ions.
validated
technique
extracting
various
waste
samples,
achieving
high
recovery
rates
(95.30–104.75%),
demonstrating
effectiveness
lack
matrix
interference.
Langmuir,
Freundlich,
Temkin
isotherm
models
used
describe
process.
Comparing
models,
Langmuir
model
most
excellent
R2
value
is
best
interpreting
experimental
data.
Among
three
kinetic
pseudo-first-order
(PFO),
pseudo-second-order
(PSO)
kinetic,
interparticle
diffusion
(ID)
PFO
exhibited
(0.9976).
Thermodynamic
calculations
reveal
positive
ΔH°,
indicating
endothermic
process,
negative
ΔG°
values
representing
spontaneous
298–323
K.
ΔS°
shows
that
adsorbed
molecules
are
more
uniformly
dispersed
surface,
potentially
enhancing
