In
this
study,
cobalt
titanate
nanoparticles
(CoTiO₃
NPs)
were
synthesized
and
applied
as
a
photocatalyst
to
degrade
atrazine.
Scanning
electron
microscopic
(SEM)
analysis
showed
irregularly
shaped
particles
prone
agglomeration,
while
X-ray
diffraction
(XRD)
confirmed
the
formation
of
rhombohedral
CoTiO₃
phase
with
crystallite
size
3.76
nm.
Raman
spectroscopic
vibrations
typical
for
Ti–O
Co–O
bonds
well-defined
structure.
Thermogravimetric
(TGA)
that
remained
stable
up
800
°C.
The
photocatalytic
activity
NPs
was
tested
under
sunlight
irradiation
results
obtained
demonstrated
excellent
efficiency
compared
photolysis
reaction.
influenced
by
concentration
(20–50
ppm),
catalyst
dosage
(0.5–2.0
mg/L),
pH
(4.21–10.22),
time
(0–120
min).
exhibited
surface
area
32.5
m2/g
(DFT)
828.03
m⁻1
(BET),
pore
volume
0.03925
m3/g,
bandgap
energy
2.66
eV.
Kinetic
studies
degradation
followed
Langmuir–Hinshelwood
model,
reaction
being
rate-determining
step.
Adsorption
rate
constants
found
range
from
0.03828
0.166528
min⁻1,
ranged
0.373692
0.977135
min⁻1.
also
recyclability,
maintaining
high
after
five
cycles.
Scavenger
experiments
hydroxyl
radicals
(HO•)
are
responsible
atrazine
GCMS
complete
mineralization
carbon
dioxide
(CO₂)
water
(H₂O)
final
products.
Results in Surfaces and Interfaces,
Год журнала:
2024,
Номер
14, С. 100192 - 100192
Опубликована: Фев. 1, 2024
Water
depollution
via
adsorption
is
an
energy-efficient
technique
that
uses
activated
carbon
produced
from
walnut
shells
to
remove
different
pollutants.
Our
research
integrates
theoretical
and
experimental
approaches
comprehensively
understand
the
subject.
By
analyzing
organic
functional
groups
in
shell-derived
(AC-Ws),
evaluating
performance,
employing
DFT
analysis,
optimizing
conditions,
we
provide
valuable
insights
into
application
of
AC-Ws
for
removing
pesticide
pollutants
wastewater.
The
properties
this
(AC-Ws)
are
identified
by
techniques
such
as
XRD,
FTIR,
SEM/EDX,
pHzpc,
Boehm
titration.
A
response
surface
methodology
(RSM)
has
been
utilized
develop
experiment
aqueous
solutions
two
herbicides,
2,4,5-trichlorophenoxyacetic
acid
(2.4.5-T),
2,4-Dichlorophenoxyacetic
(2,4-D).
Abbreviations
technical
terms
will
be
explained
when
first
used,
objective
language
used
throughout.
Grammar
spelling
conform
British
standards.
examined
removal
herbicides
based
on
three
independent
variables;
pH,
dosage,
temperature,
within
specific
ranges
(pH:
4–10,
dosage:
0.1–0.3
g/L,
temperature:
20–40
°C).
conducted
17
experiments
using
Design-Expert
software.
Optimal
conditions
included
pH
4
dosage
0.3
g/L
2.4.5-T
5
0.1
2,4-D.
These
demonstrated
efficiency
98%
desirability
function
1.000
92%
findings
suggest
process
was
thermodynamically
favorable
exothermic.
data
described
accurately
pseudo-second
order
kinetic
model,
Freundlich
isotherm
model
showed
good
alignment
with
equilibrium
data.
Using
method,
functions
were
adsorbent's
surface,
density
theory
(DFT)
applied
evaluate
mechanism
sites.
Desalination and Water Treatment,
Год журнала:
2024,
Номер
318, С. 100406 - 100406
Опубликована: Апрель 1, 2024
The
orthophosphoric
acid-treated
pomegranate
peels
(POPAC)
performance
was
investigated
through
batch
mode
for
Methylene
Blue
dye
(MB)
adsorption
from
an
aqueous
solution.
Although
chemical
activation
using
various
agents
has
been
explored
by
other
research
work,
but
novelty
application
of
H3PO4
in
a
1:1
weight
percentage
exhibits
unprecedented
enhancing
the
efficiency
MB
removal.
Dependent
parameters
were
optimized,
with
pH
sample,
contact
interval,
initial
concentration,
and
dose
adsorbent.
Excellent
removal
(above
92%)
observed
at
8
0.25
mg/L
120
minutes
duration.
At
qmax
value
14.03
mg/g,
Langmuir
isotherm
demonstrated
monolayer
onto
POPAC,
elucidating
mechanism
R2
=
0.9883.
kinetics
fit
excellently
pseudo-second-order
model
0.9997,
model's
estimated
capacity
agreed
well
results
obtained
experimental
investigation.
Thermodynamic
parameters,
including
ΔGᵒ,
ΔH°,
ΔS°,
additionally
spontaneous
as
endothermic
nature
on
POPAC's
surface.
Furthermore,
regeneration
studies
0.1
M
NaOH
HCl
solutions
show
adequate
elimination
after
three
cycles.
According
to
findings,
peel
may
be
inexpensive,
environmentally
acceptable,
operative
biosorbent
eliminate
polluted
matrices.
