Water Air & Soil Pollution,
Год журнала:
2024,
Номер
235(8)
Опубликована: Июль 10, 2024
Abstract
In
this
study,
the
efficacy
of
sono-assisted
adsorption
for
removal
methyl
violet
2B
(MV-2B)
was
investigated.
A
magnetic
adsorbent
synthesized
using
kaolin
and
TiO
2
,
designated
as
KTF.
Various
analyses
including
scanning
electron
microscopy
with
energy
dispersive
spectroscopy
(SEM–EDS),
Brunauer–Emmett–Teller
(BET),
Fourier
transform
infrared
(FTIR),
X-ray
powder
diffraction
(XRD),
Zeta
potential
vibrating
sample
magnetometer
(VSM)
were
conducted
to
characterize
structure
The
BET
surface
area
pore
volume
KTF
determined
be
65.279
m
/g
0.072
cm
3
/g,
respectively.
VSM
analysis
confirmed
superparamagnetic
property
effect
contact
time,
initial
MV-2B
concentration,
amount,
temperature,
ionic
strength
pH
solution
on
Sono-assisted
achieved
at
a
rate
85.6%
under
optimal
conditions:
original
pH,
amount
0.2
g/100
mL,
concentration
20
mg/L,
time
15
min,
temperature
22
°C.
Conversely,
lower
efficiencies
observed
conventional
methods
employing
shaking
(37%)
stirring
(60.5%).
kinetics
followed
pseudo-second
order
model,
while
Freundlich
isotherm
model
exhibited
superior
fit
(R
=
0.985)
in
describing
equilibrium
behavior
compared
Langmuir
Temkin
models.
Environmental Technology & Innovation,
Год журнала:
2023,
Номер
30, С. 103092 - 103092
Опубликована: Март 2, 2023
The
removal
of
a
toxic
contaminant
like
Cr(VI)
from
the
water
via
green
adsorbents
biochar
and
activated
carbon
is
an
eco-friendly
technique.
In
this
paper,
using
commercial
as
raw
material,
magnetic
ferric
oxide/activated
(Fe3O4@AC)
was
prepared
by
chemical
co-precipitation
method,
adsorption
in
applied.
synthesized
materials
were
characterized
advanced
characterization
techniques
including
XRD,
BET,
FT-IR,
XPS.
effects
initial
concentration,
temperature,
time
on
effect
evaluated.
Results
illustrated
that
maximum
achieved
Fe3O4@AC
45.3
mg/g,
with
rate
88.8%
at
optimum
pH
2.0
12
h.
Under
these
conditions,
fits
pseudo-second-order
kinetic
model
(PSO)
Langmuir
isotherm
spontaneous,
endothermic,
irreversible
process.
results
XPS
analysis
before
after
suggested
mechanism
mainly
based
chemisorption,
supplemented
physical
adsorption,
accompanied
electrostatic
attraction
complexation.
Polymers,
Год журнала:
2022,
Номер
14(12), С. 2396 - 2396
Опубликована: Июнь 13, 2022
The
adsorption
mechanisms
of
methylene
blue
(MB)
onto
olive
waste
(residue)
treated
with
KOH
(OR-KOH)
and
an
OR-KOH
PEG–silica
gel
composite
(OR-KOH/PEG-SG)
at
various
temperatures
were
investigated
using
a
combination
experimental
analysis
Monte
Carlo
ab-initio
simulations.
effects
process
variables
such
as
pH,
temperature,
starting
adsorbate
concentration
investigated.
data
fitted
to
Langmuir
Freundlich
models.
maximum
capacities
MB
OR-KOH/PEG-SG
adsorbents
reached
values
504.9
mg/g
161.44
mg/g,
respectively.
FT-IR
spectra
indicated
that
electrostatic
attraction
hydrogen
bond
formation
critical
for
the
generated
from
waste.
energetic
analyses
performed
atomistic
simulations
explained
results
differential
affinity
confirmed
nature
interactions
between
be
van
der
Waals
forces.
Sustainability,
Год журнала:
2022,
Номер
14(21), С. 14188 - 14188
Опубликована: Окт. 31, 2022
Herein,
respiratory
nitrate
reductases
(NAR)
were
utilized
in
the
biosynthesis
of
zero-valent
iron
(ZVI)
graphene
nanocomposite
as
a
simultaneous
reducing
and
capping
agent,
for
first
time,
to
efficiently
adsorb
methylene
blue
(MB)
direct
red-81
(DR-81).
Under
anaerobic
conditions,
greenly
synthesized
was
incubated
with
precursor
presence
crude-NAR
enzyme
48
h
obtain
ZVI
composite
followed
by
characterizing
this
using
physiochemical
analyses.
Scanning
transmission
electron
microscopy,
energy
dispersive
X-ray
spectroscopy
diffraction
techniques
assured
chemical
composition
interaction
between
graphene.
The
influences
operating
conditions
such
contact
pH
adsorbent
dose
on
adsorption
efficacy
explored
case
graphene,
ZVI.
displayed
highest
removal
efficiency
MB
DR-81
compared
ZVI-NPs.
percentages
nanocomposites
88.3
±
2.66%
87.6
2.1%,
respectively,
at
7,
20
mg/50
mL,
initial
or
concentration
10
mg/L
shaking
speed
150
rpm.
A
pseudo
first-order
model
could
describe
kinetics,
mechanism
discussed.
promising
results
current
study
support
potential
recruitment
eliminating
various
pollutants
from
industrial
effluents
larger
scale.
Further,
prepared
nanohybrid
can
be
used
other
applications
photocatalysis,
Fenton
persulfate
activation
processes.
Applied Surface Science Advances,
Год журнала:
2023,
Номер
16, С. 100424 - 100424
Опубликована: Июнь 7, 2023
This
study
focuses
on
the
valorization
of
stalks
pepper
plants
(SPP),
to
produce
efficient
activated
carbons
for
wastewater
treatment.
The
activation
process
was
done
by
potassium
hydroxide
30
min
under
microwave
irradiation.
Fourier
Transform
Infrared
Spectroscopy
(FTIR),
X-ray
diffraction
(XRD),
and
scanning
electron
microscopy-energy
dispersive
analysis
(SEM-EDX)
analyses
were
investigated.
Adsorption
performance
tested
removal
methyl
orange
(MO)
methylene
blue
(MB).
Experimental
results
show
that
adsorption
correlated
pseudo-second-order
model.
Equilibrium
uptake
both
dyes
suitable
Langmuir
isotherm
reaction
endothermic
MB
exothermic
MO.
Global
reactivity
descriptors
have
been
calculated
discussed.
behaviors
chemical
compounds
graphite
(104),
CaCO3
(104)
carbon
surfaces
investigated
using
Monte
Carlo
simulation.
energies
studied
different
followed
order:
>
Activated
Graphite
MO
MB,
respectively.
