Nanocomposites,
Год журнала:
2023,
Номер
9(1), С. 183 - 202
Опубликована: Дек. 18, 2023
In
this
investigation,
we
employed
chemical
oxidative
copolymerization
techniques
to
produce
cross-linked
polyaniline/chitosan-graphene
oxide-oxidized
single-wall
carbon
nanotubes
(Cross
PANI/Chito-GO-OXS
NCs)
as
a
network
increase
the
surface
area,
well
active
centers
enhance
efficiency
of
adsorption
anionic
and
cationic
dyes.
This
novel
material
was
utilized
an
adsorbent
for
decontaminating
water
by
eliminating
acid
red
dye
(AR1)
brilliant
green
(BG).
Several
analytical
were
assess
composition
structure
synthesized
adsorbent,
including
scanning
electron
microscopy
(SEM),
high-resolution
transmission
(HR-TEM),
X-ray
powder
diffraction
(XRD),
infrared
spectroscopy
(FT-IR),
thermogravimetric
analysis
(TGA),
Raman
spectroscopy.
To
efficacy
Cross
NCs
in
removal,
batch
experiments
carried
out
under
diverse
conditions,
such
varying
pH,
quantity,
agitation
duration,
ionic
strength,
temperature.
The
results
indicated
that
optimum
conditions
AR1
removal
achieved
at
pH
2,
using
5
mg
concentration
20
mg/L
120
min.
Conversely,
BG
most
favorable
outcomes
observed
6,
with
use
Under
these
operating
maximum
actual
wastewater
determined
be
96.73%
95.55%
dye.
Additionally,
analyzed
isotherm
data
utilizing
various
models.
kinetics
elucidated
through
pseudo-second-order
model,
supported
regression
data,
which
yielded
R2
values
0.9839
0.9928
BG,
respectively,
describing
both
dyes
onto
NCs.
Furthermore,
thermodynamic
revealed
is
endothermic
process,
while
exothermic,
are
spontaneous
chemisorption
processes.
Desalination and Water Treatment,
Год журнала:
2024,
Номер
317, С. 100207 - 100207
Опубликована: Янв. 1, 2024
Halloysite
sample,
obtained
from
Phu
Tho
province,
Vietnam,
was
utilized
to
investigate
the
adsorption
behavior
of
Cu2+
ions.
Several
factors
influencing
efficiency
and
capacity
were
explored,
including
pH
value,
contact
time,
adsorbent
dose,
initial
concentration.
Under
optimal
conditions
(0.8
g
halloysite
per
50
mL
solution,
an
concentration
40
mg/L,
6.2,
a
time
80
minutes,
temperature
25°C),
study
yielded
85.19%
2.14
mg/g
for
Adsorption
isotherm
analysis
conducted
using
Langmuir
Freundlich
models,
while
kinetics
process
investigated
through
first-order
pseudo
second-order
models.
Furthermore,
desorption
ions
recovery
Cu
metal
with
reaching
94.65%
under
suitable
(0.3
mass
halloysite,
current
7.5
mA,
electrolytic
5
hours
at
60°C).
These
findings
suggest
potential
application
clay
removing
polluted
water,
recovering
metal,
reusing
adsorbent.
Journal of Saudi Chemical Society,
Год журнала:
2023,
Номер
27(6), С. 101764 - 101764
Опубликована: Ноя. 1, 2023
In
contemporary
times,
there
has
been
a
notable
emphasis
on
the
advancement
of
adsorbents
with
high
efficiency
for
purpose
extracting
organic
dyes
from
wastewater.
Therefore,
suggested
method
involves
improving
surfaces
by
changing
polymers
in
order
to
make
them
better
at
absorbing
substances.
The
goal
this
study
was
create
very
effective
nanocomposite
(NCs)
combining
CuFe2O4
nanoparticles
(CuF
NPs)
and
zeolite
(ZSM-5)
different
types
cellulose,
such
as
cellulose
(CE),
acetate
(CEA),
carboxymethyl
(CMC),
remove
Brilliant
Green
(B.G.),
cationic
dye,
water
solutions.
We
investigated
influence
several
factors
efficacy
dye
removal
NCs.
These
included
kind
derivative
used,
adsorbent
dose,
solution
temperature,
pH,
contact
duration.
results
prepared
ternary
ZSM-5/CuF/CE,
ZSM-5/CuF/CEA,
ZSM-5/CuF/CMC
NCs
show
that
among
fabricated
NCs,
ZSM-5/CuF/CE
have
highest
adsorption
capacity
(9.66
mg/g).
This
result
highlights
promising
capability
these
effectively
removing
B.G.
dye.
obtained
studies
provided
evidence
process
occurred
spontaneously
exothermic,
supported
both
thermodynamic
kinetic
criteria.
values
R2
correlation
coefficient
ZSM-5/CuF/CEA
were
0.993
0.995,
respectively.
Journal of Applied Polymer Science,
Год журнала:
2024,
Номер
141(21)
Опубликована: Март 17, 2024
Abstract
In
this
study,
a
new
hybrid
material
was
created
that
exhibits
excellent
adsorption
performance
and
high
stability.
POT‐PVP/MgF/CS‐OXSWCNTs
NCs
were
synthesized
using
three‐step
approach.
The
process
involved
the
chemical
polymerization
of
poly(o‐toluidine)‐polyvinylpyrrolidone
(POT‐PVP)
with
MgFe
2
O
4
nanoparticles
(MgF
NPs)
chitosan‐oxidized
single‐wall
carbon
nanotubes
(CS‐OXSWCNTs).
synthesis
use
an
egg
white
method
to
synthesize
MgF
NPs
cross‐linking
chitosan
OXSWCNTs
glutaraldehyde
(GA)
obtain
CS‐OXSWCNTs.
POT‐PVP
copolymer
then
used
coat
CS‐OXSWCNTs
NCs.
successful
strong
component
interaction
confirmed
by
several
characterization
techniques,
including
X‐ray
diffraction
spectroscopy
(XRD),
Fourier‐transform
infrared
(FTIR),
Raman
spectroscopy.
Microscopy
analysis
scanning
electron
microscopy
(SEM)
transmission
(TEM)
verified
had
properly
coated
N
adsorption–desorption
isotherm
specific
surface
area
increased
addition
Furthermore,
composite
structure
greatly
improved
thermal
stability
To
evaluate
how
well
nanocomposites
(NCs)
eliminated
pollutants,
artificially
produced
toxic
effluent
contained
acid
red
dye
(A.R)
applied.
investigate
their
impact
on
removal,
parameters
changed,
pH,
adsorbent
dosage,
time,
temperature,
ionic
strength.
showed
higher
removal
rate
based
greater
area,
stability,
conducting
power
than
POT‐PVP.
It
found
25
mg
L
−1
7.5
optimal
concentration
respectively.
achieved
99.46%
efficiency
at
acidic
pH
2.
have
maximum
capacity
107.4
g
,
followed
pseudo‐second‐order
kinetics.
Thermodynamic
analyses
revealed
onto
endothermic,
implying
spontaneous
physical
mechanism.
can
be
inferred
from
these
results
are
useful
for
eliminating
pollutants
water.
Catalysts,
Год журнала:
2024,
Номер
14(12), С. 897 - 897
Опубликована: Дек. 6, 2024
This
study
focuses
on
the
synthesis
of
a
novel
layered
double
hydroxide
and
its
application
in
two
environmental
remediation
processes.
Graphene
oxide,
two-dimensional
material,
has
potential
applications
this
field.
However,
tendency
to
agglomerate
restricts
usability.
Our
objective
was
increase
morphology
performance
(LDH)
by
combining
GO
with
hydrotalcite.
The
LDH/GO
nanohybrids
were
utilized
as
photocatalysts
for
degradation
methylene
blue
(MB)
dye
investigated
sorbents
acid
red
(A.R)
water.
In
order
achieve
objective,
ZnAl-NO3
LDH
synthesized
using
co-precipitation
method,
Zn:Al
ratio
~3.
Subsequently,
intercalated
varying
ratios
as-received
graphene
oxide.
An
array
analytical
techniques,
including
X-ray
diffraction
(XRD),
Fourier
transform
infrared
spectroscopy
(FT-IR),
photoelectron
(XPS)
measurements,
N2
physisorption,
scanning
electron
microscopy–energy-dispersive
analysis
(SEM-EDX),
diffuse
reflectance
UV–vis
spectra
(DR
UV-vis),
employed
examine
physicochemical
properties
LDH.
These
techniques
confirmed
that
obtained
material
is
zinc-aluminum
hydrotalcite
GO.
addition
oxide
(GO)
structure
improved
As
result,
composite
ZnAl-LDH-10
shows
significant
field
photocatalytic
MB.
Additionally,
incorporation
enhanced
absorption
light
visible
region
spectra,
leading
elimination
A.R
compared
without
or
other
Applied Water Science,
Год журнала:
2023,
Номер
13(12)
Опубликована: Ноя. 4, 2023
Abstract
It
is
critical
to
remove
dyes
from
wastewater
as
they
cause
harm
human
and
aquatic
life
due
their
carcinogenic,
toxic,
mutagenic
effects.
Here,
low-cost
activated
carbons
(CPs)
were
produced
the
date
(
Phoenix
dactylifera
L.)
pits.
The
prepared
CPs
chemically
utilizing
zinc
chloride
obtain
pits
(ZCPs).
physicochemical
properties,
chemical
composition,
morphology
of
ZCPs
material
active
surface
functional
groups
involved
in
adsorption
identified
using
N
2
adsorption–desorption
isotherm,
scanning
electron
microscopy,
point
zero
charges
(pH
PZC
),
Fourier
transforms
spectroscopy.
biocomposite
was
applied
for
Brilliant
green
(BG)
removal
aqueous
solutions,
where
efficiency
assessed
functions
pH
value,
foreign
ions,
initial
dye
concentration,
dose
adsorbent,
time,
temperature.
outcomes
showed
that
exhibited
high
uptake
BG
with
a
q
e
247.752
mg/g.
isotherm
kinetic
studies
show
process
onto
followed
Langmuir,
pseudo-second-order
models,
respectively.
From
estimated
thermodynamic
functions,
it
found
nature
adsorbent
endothermic
spontaneous.
With
relative
standard
deviation
less
than
3%,
successfully
real
water
samples
recovery
more
90%.
plausible
mechanism
can
be
assigned
various
interactions,
such
pore–filling,
electrostatic
attraction,
H-bonding,
π–π
stacking.
Adsorption Science & Technology,
Год журнала:
2024,
Номер
42
Опубликована: Янв. 1, 2024
This
study
synthesized
biochar
adsorbents
from
chemically
activated
sugarcane
bagasse
using
ZnCl
2
at
pyrolysis
temperatures
of
400,
500,
and
600°C.
The
modified
was
used
to
remove
methylene
blue
(MB)
acid
red
(AR)
dyes.
surface
characteristics
the
biochars
were
analyzed
Scanning
Electron
Microscope
(SEM),
Fourier
Transform
infrared
spectroscopy
(FTIR),
Brunauer-Emmett-Teller
(BET)
analysis.
Batch
adsorption
experiments
conducted
assess
impact
various
parameters
on
performance.
Among
different
samples,
Zn-BC-600
exhibited
superior
capacities
for
MB
AR
with
values
182.225
43.324
mg/g,
respectively.
efficiency
significantly
influenced
by
pH,
optimal
conditions
pH
=
6.0
2.0
10.0
AR.
process
Zn-BCs
followed
a
pseudo-second-order
kinetic
model,
indicating
chemisorption
as
primary
mechanism.
Adsorption
isotherm
studies
revealed
that
conform
Freundlich
proposing
multilayer
due
heterogeneity
surface.
Regeneration
indicated
could
be
reused
multiple
cycles.
In
conclusion,
showed
strong
affinity
both
AR,
particularly
MB,
making
it
promising
adsorbent
treating
printing
dyeing
wastewater.
