Innovative use of recycled aluminum adsorbent for methylene blue adsorption and post-application for soil stabilization
Journal of Contaminant Hydrology,
Год журнала:
2025,
Номер
272, С. 104553 - 104553
Опубликована: Март 28, 2025
Язык: Английский
Amoxicillin adsorption onto oil palm trunk‐derived activated carbon: synthesis optimization, modelling of mass transfer and ultrasonic regeneration
Journal of Chemical Technology & Biotechnology,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 10, 2025
Abstract
BACKGROUND
Antibiotics
such
as
amoxicillin
(AMC)
can
persist
in
the
environment
due
to
their
stable
molecular
structures.
This
study
aimed
(i)
optimize
synthesis
of
oil
palm
trunk‐based
activated
carbon
(OPTAC)
for
AMC
removal,
(ii)
model
adsorption
process
using
mass
transfer
(MTM)
and
(iii)
evaluate
OPTAC
regeneration
through
ultrasonic
washing.
was
synthesized
potassium
hydroxide
activation
followed
by
dioxide
treatment.
RESULTS
Response
surface
methodology
(RSM)
identified
optimal
conditions
at
343
W,
12.87
min
an
impregnation
ratio
2.00
g
−1
.
Under
these
conditions,
predicted
uptake
146.44
mg
(actual:
154.15
;
5.00%
error),
yield
42.78%
41.19%;
3.86%
error).
The
AMC–OPTAC
Freundlich
isotherm,
with
a
Langmuir
capacity
(
Q
m
)
238.67
Kinetic
analysis
revealed
that
pseudo‐first‐order
best
described
system.
MTM
yielded
average
constant
k
0.23
L
h
,
rate
0.00051
estimated
area
611.34
2
closely
matching
measured
mesopore
(647.82
5.63%
Thermodynamic
confirmed
physisorption
dominant
mechanism,
spontaneous
endothermic
behavior.
In
studies,
washing
outperformed
microwave
reactivation,
maintaining
removal
efficiency
above
50%
five
cycles,
compared
three
CONCLUSIONS
RSM
successfully
optimized
yield,
while
effectively
active
involved
process.
©
2025
Society
Chemical
Industry
(SCI).
Язык: Английский
Optimized size and stability of composite CuO–ZnO metal oxide nanoparticles for efficient removal of Reactive Black 5 dye
Journal of Chemical Technology & Biotechnology,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 16, 2025
Abstract
BACKGROUND
The
increasing
contamination
of
water
bodies
with
industrial
dyes
necessitates
efficient
remediation
strategies.
CuO–ZnO
composite
nanoparticles
(NPs)
have
shown
promise
as
adsorbents
due
to
their
high
surface
area,
stability,
and
tunable
properties.
This
study
focuses
on
optimizing
the
synthesis
conditions
CuO‐ZnO
NPs
via
a
co‐precipitation
method
evaluating
performance
for
removal
Reactive
Black
5
(RB5)
dye.
RESULTS
were
synthesized
varied
precursor
ratios,
pH
values,
temperatures,
reagent
addition
times
achieve
optimal
size
stability.
Characterization
using
ultraviolet–visible
spectroscopy,
fluorescence,
X‐ray
diffraction,
Fourier
transform
infrared
dynamic
light
scattering,
vibrating‐sample
magnetometry,
Brunauer–Emmett–Teller
analysis
confirmed
structural,
optical,
physical
properties
optimized
composite.
smallest
highest
stability
concentration
ratio
50:50
was
obtained
at
11,
80
°C,
time
min.
Composite
show
ferromagnetic
behavior.
adsorption
efficiency
RB5
dye
studied
under
different
operational
parameters,
revealing
that
maximum
(92%)
occurred
2
contact
60
Adsorption
kinetics
followed
pseudo‐first‐order
model,
while
equilibrium
data
aligned
Freundlich
isotherm,
indicating
multilayer
adsorption.
Thermodynamic
endothermic
spontaneous
nature
process.
CONCLUSION
demonstrated
maintained
significant
reusability
across
multiple
adsorption–desorption
cycles.
These
findings
highlight
potential
an
effective
sustainable
adsorbent
wastewater
treatment.
©
2025
Society
Chemical
Industry
(SCI).
Язык: Английский
Preparation and characterisation of BiOCl nano photocatalyst for the remediation of wastewater under LED light
International Journal of Environmental & Analytical Chemistry,
Год журнала:
2024,
Номер
unknown, С. 1 - 25
Опубликована: Дек. 22, 2024
Dye,
a
major
global
pollutant
causing
environmental
and
health
issues,
can
be
effectively
degraded
through
photocatalysis.
This
study
synthesised
bismuth
oxychloride
(BiOCl)
nano-photocatalyst
via
hydrolysis
characterized
it
using
various
analytical
instruments.
The
UV-Vis
absorbance
of
the
displayed
peaks
at
211
nm,
361
688
with
band
gap
3.0
eV,
conduction
minimum
1.97
valence
maximum
4.97
eV.
dynamic
light
scattering
showed
3349
nm
660
while
BiOCl
had
zeta
potential
-17.3
mV
conductivity
0.245
mS/cm.
X-ray
diffraction
exhibited
four
sharp
intensity
11.95º,
25.81º,
32.50º,
33.40º,
average
crystallite
size
was
43.39
scanning
electron
microscope
plate-like
morphology.
achieved
88.21%
degradation
methyl
green
within
60
minutes
under
LED
irradiation
pH
7.5
dye
concentration
6×10−6
mol/L.
photocatalytic
performance,
driven
by
hydroxyl
(•OH)
superoxide
(O2•−)
radicals,
96.55%
mineralization
as
confirmed
COD
analysis.
These
findings
emphasize
for
effective
sustainable
wastewater
remediation
visible
conditions.
Язык: Английский