Results in Engineering,
Год журнала:
2024,
Номер
21, С. 101910 - 101910
Опубликована: Фев. 10, 2024
This
study
aimed
to
determine
the
effectiveness
of
Spathodea
Campanulata
derived
activated
carbon
in
removing
methylene
blue
(MB)
from
wastewater.
The
was
prepared
through
chemical
impregnation
with
H3PO4
and
thermal
activation
at
500
°C
for
2
h.
adsorption
experiments
were
optimized
using
24
full
factorial
designs,
considering
pH,
contact
time,
initial
MB
concentration,
adsorbent
dosage
as
parameters.
characterization
revealed
favorable
properties,
including
multiple
surface
functional
groups,
a
maximum
specific
area
1054
m2/g,
highly
porous
morphology.
conditions
achieved
removal
efficiency
99.95%,
pH
9,
time
120
min,
dye
concentration
90
mg/L,
an
0.2
g/100
mL
being
most
effective
Freundlich
isotherm
model
provided
best
fit
experimental
data,
indicating
heterogeneous
multilayer
surface.
kinetics
indicated
that
chemisorption
primary
mechanism.
In
conclusion,
based
could
serve
cost-effective
aqueous
solutions
Environmental Pollution,
Год журнала:
2024,
Номер
346, С. 123637 - 123637
Опубликована: Фев. 24, 2024
Widespread
contamination
by
heavy
metals
(HMs)
and
dyes
poses
a
major
health
risk
to
people
ecosystems
requiring
effective
treatment.
In
this
work,
rice
husk
(RH)
shrimp
shells
were
extracted
obtain
amorphous
silica
chitosan,
respectively,
which
utilized
produce
nano-chitosan-coated
(NCCS).
To
ensure
the
stability
of
nanoparticles,
was
freeze-dried
after
being
coated
with
nano-chitosan.
Functional
groups
(–NH2,
–OH,
P]O)
from
chitosan
nanoparticles
(CNPs)
introduced
surface
during
process.
Dyes
such
as
brilliant
green
(BG),
methylene
blue
(MB)
reactive
brown
(RB)
well
HMs
(Cr6+,
Pb2+,
Cd2+,
Ni2+)
removed
adsorbents.
CNPs
showed
highest
adsorption
capacity
for
RB
(59.52
mg/g)
among
Cr6+
(42.55
HMs.
different
Although
NCCS
similar
capabilities
dyes,
best
stability.
The
performance
decreased
>
MB
BG
Pb2+
Cd2+
Ni2+.
reactions
followed
both
pseudo-first-order
second-order
kinetics,
spontaneous
thermodynamic
analysis.
summary,
waste-derived
adsorbents
demonstrated
excellent
potential
removing
water,
while
supporting
management
solid
waste.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Фев. 21, 2024
Abstract
This
study
synthesized
a
highly
efficient
KOH-treated
sunflower
stem
activated
carbon
(KOH-SSAC)
using
two-step
pyrolysis
process
and
chemical
activation
KOH.
The
resulting
material
exhibited
exceptional
properties,
such
as
high
specific
surface
area
(452
m
2
/g)
excellent
adsorption
capacities
for
phenol
(333.03
mg/g)
bisphenol
A
(BPA)
(365.81
mg/g).
was
spontaneous
exothermic,
benefiting
from
the
synergistic
effects
of
hydrogen
bonding,
electrostatic
attraction,
stacking
interactions.
Comparative
analysis
also
showed
that
KOH-SSAC
performed
approximately
twice
well
biochar
(SSB),
indicating
its
potential
water
treatment
pollutant
removal
applications.
suggests
exploration
optimization
strategies
to
further
enhance
efficiency
in
large-scale
scenarios.
These
findings
contribute
development
improved
materials
pollution
control.
Frontiers in Environmental Science,
Год журнала:
2024,
Номер
12
Опубликована: Апрель 11, 2024
The
removal
of
toxic
and
harmful
dyes
like
methylene
blue
(MB)
from
textile
wastewater
is
necessary
to
reduce
environmental
pollution.
Therefore,
this
study
aimed
at
removing
MB
an
aqueous
solution
using
magnetite-doped
biochar
parthenium
hysterophorus.
Biochar
was
prepared
through
pyrolysis
techniques
500
℃
for
2
h
whereas
the
magnetite
composite
material
were
developed
coprecipitation
methods.
Herein,
NaNO3
FeSO
4
.
7H
O
utilized
as
precursor
materials
NaOH
a
precipitating
agent
preparation
magnetite.
Furthermore,
pH
point
zero
charge
(pHpzc),
Scanning
Electron
microscope
(SEM),
Fourier
Transform
Infrared
Spectroscopy
(FTIR),
X-ray
Diffraction
(XRD)
are
characterization
used
evaluate
nature
material.
On
other
hand,
full
factorial
design
involving
four
factors
two
levels
(2
)
such
(3
9),
contact
time
(10
40
min),
initial
dye
concentration
(100
150
mg/L)
adsorbent
dosage
0.01
0.04
g/100
mL
optimize
batch
adsorption
solution.
As
result,
maximum
efficiency
99.99%
attained
optimum
operating
conditions
9,
min,
100
mg/L
mL.
Langmuir,
Freundlich
Temkin
isotherm
models
investigate
in
which
with
R
0.98
found
describe
process
inferring
multilayer
heterogeneous
surface
interaction.
Additionally,
thermodynamics
depicts
that
spontaneous,
endothermic
feasible.
chemosorption
revealed
by
pseudo
second
kinetics
model
0.99.
Finally,
remarkable
reusability
ranging
99.98%
97.6%
five
consecutive
cycles
proved
magnetic
derived
hysterophorus
can
be
effective
decolourization
saturated
effluent
industrial
scale.
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.
Desalination and Water Treatment,
Год журнала:
2024,
Номер
320, С. 100607 - 100607
Опубликована: Июль 15, 2024
This
study
aims
to
enhance
local
bentonite's
effectiveness
in
removing
methylene
blue
and
procion
deep
red
dyes
from
aqueous
media
through
organic
modification
with
cetyltrimethylammonium
bromide
surfactant.
Raw
modified
bentonites
were
analyzed
using
XRF,
XRD,
FTIR,
BET/BJH,
DSC
techniques.
The
bentonite
showed
a
crystalline
structure
mesoporous
morphology
heterogeneous
surface.
Optimal
adsorption
conditions
for
MB
dye
0.2
g
adsorbent
dose,
60
min
contact
time,
mg/L
initial
concentration,
pH
8,
achieving
maximum
sorption
capacity
of
6.418
mg/g.
For
PDR
dye,
optimal
0.125
40
30
acidic
pH,
8.503
Isotherm
analysis
indicated
the
Langmuir
model
best
fits
data,
suggesting
mono-layer
process.
Kinetic
investigations
revealed
that
follows
pseudo-second-order
model,
indicating
chemisorption
mechanism.
Thermodynamic
results
exothermic
endothermic
PDR.
work
highlights
potential
surfactant-modified
as
cost-effective
sorbent
treating
polluted
systems,
effectively
both
cationic
anionic
dyes.
RSC Advances,
Год журнала:
2024,
Номер
14(18), С. 12703 - 12719
Опубликована: Янв. 1, 2024
The
quest
for
an
efficient
and
sustainable
adsorbent
material
that
can
effectively
remove
harmful
hazardous
dyes
from
industrial
effluent
has
become
more
intense.
Thermally
modified
nanocrystalline
snail
shell
is
a
new
biosorbent
removing
methylene
blue
dye
contaminated
wastewater.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Март 8, 2024
Abstract
The
pomelo-doped
zinc
oxide
beads
(PZB),
titanium
dioxide
(PTB),
and
(PZTB)
were
synthesized
for
sorbing
methylene
blue
(MB)
dye.
Their
characterizations
explored
by
X-Ray
Diffractometer
(XRD),
Field
Emission
Scanning
Electron
Microscopy
Focus
Ion
Beam
(FESEM-FIB),
Energy
Dispersive
Spectrometer
(EDX),
Fourier
Transform
Infrared
Spectroscopy
(FT-IR).
In
addition,
their
sorbent
efficiencies
MB
dye
investigated
through
batch
experiments,
reusability
studies,
sorption
isotherms,
kinetics,
thermodynamic
studies.
They
crystalline
phases
presenting
the
specific
peaks
of
(ZnO)
or
(TiO
2
).
surfaces
had
lamella
structures
with
coarse
surfaces,
they
also
found
ZnO
TiO
on
surfaces.
Zn–O
Ti–O–Ti
was
detected
in
PZB
PTB
or,
PZTB
depending
upon
metal
types
added
into
pomelo
beaded
sorbents.
For
could
adsorb
more
than
86%,
showed
highest
removal
efficiency.
be
reused
three
cycles
high
sorptions
72%.
corresponded
to
Freundlich
pseudo-second-order
kinetic
models.
Moreover,
increasing
temperature
affected
decreasing
which
exothermic
processes.
