Heliyon,
Год журнала:
2024,
Номер
10(17), С. e36731 - e36731
Опубликована: Авг. 29, 2024
Dyes
are
among
the
toxic
contaminants
that
significantly
impact
water
ecosystems.
A
biomaterial
prepared
from
Zizyphus
Spina-Christi
seed
(ZSCS)
to
remove
methylene
blue
(MB)
and
methyl
violet
(MV)
an
aqueous
solution
was
investigated.
Several
techniques
have
been
used,
including
FTIR,
SEM,
EDX,
XPS,
TGA,
characterize
physical
chemical
properties
of
ZSCS.
The
effect
various
parameters
such
as
pH,
adsorbent
dosage,
contact
time,
temperature,
initial
dye
concentration
on
adsorption
process
were
studied.
ZSCS
showed
efficient
MB
MV
with
Langmuir
capacity
666.66
476.19
mg/g,
respectively,
at
experimental
condition
[(pH
=
6;
time
30
min;
T
45
°C,
concentration:
500
mg/L,
dose
0.6
g/L
for
1
dye)].
Kinetic
isotherm
models
applied
fit
outcomes.
result
ultrafast
absorption
a
high
removal
efficiency
within
5
min
indicating
its
effective
properties.
model
most
suitable
describing
dyes
pseudo-second-order
kinetic
fits
better
onto
than
other
models,
suggesting
mechanism
followed
chemisorption.
Our
results
could
offer
cost-effective
approach
wastewater.
Journal of Molecular Liquids,
Год журнала:
2024,
Номер
399, С. 124435 - 124435
Опубликована: Март 12, 2024
The
presence
of
malachite
green
(MG)
in
surface
waters
represents
a
major
health
hazard
for
aquatic
organisms
and
communities
living
near
contaminated
water
sources.
In
this
study,
almond
shell
adsorbents
prepared
from
the
four
types
Marcona
(M),
Fournat
de
Brézenaud
(FZ),
Ferraduel
(FD)
Ferriages
(FG),
used
to
clean
wastewater
textile
industry
that
had
been
with
color
MG.
Optimal
adsorption
parameters
were
determined
through
batch
experiments
using
standard
dye
solution.
Further,
SEM,
XRD,
BET,
FTIR
employed
characterizing
biosorbents.
examination
experimental
data
isotherms
kinetic
models
revealed
MG
occurs
monolayer,
chemical
as
rate-controlling
step.
maximum
capacities,
under
pH
around
7
temperature
35
°C
40.82,
60.98,
48.08,
117.65
mg/g
M,
FD,
FG,
FZ,
respectively.
addition,
MC
simulation
models,
DFT,
calculations
performed
provide
more
detailed
understanding
mechanism.
Topological
studies
such
NCI,
RDG,
LOL,
ELF
conducted
discussed
Multiwave
function
(Multiwfn)
VMD
programs
liquid
phase.
conclusion,
chemisorption
limits
rate
process,
cation
is
susceptible
nucleophilic
than
electrophilic
attacking.
Based
on
these
theoretical
results,
it
possible
consider
materials
an
inexpensive
viable
solution
eliminate
wastewater.
Adsorption
cellulose
can
be
considered
feasible
strategy
treatment,
optimized
use
real
samples
at
even
lower
concentrations.
This
approach
offers
effective
technological
alternative
conventional
methods
retention
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.
Journal of Saudi Chemical Society,
Год журнала:
2024,
Номер
28(3), С. 101852 - 101852
Опубликована: Апрель 5, 2024
In
this
study,
a
novel
copolymer
hydrogel
according
to
poly
(acrylonitrile-co-sodium
styrene
sulfonate)
(ASD)
as
an
effective
adsorbent
was
prepared
via
free
radical
polymerization
of
the
solution
at
ratio
1:1
remove
cationic
crystal
violet
dye
(CV)
from
wastewater.
The
thoroughly
characterized
using
FTIR,
TGA,
SEM
and
EDX
analysis.
that
produced
has
notable
capacity
for
adsorbing
uptake
over
wide
pH
range
well
easily
separated
without
need
filtration
centrifugation.
Under
optimal
conditions
1
g/L
hydrogel,
400
mg/L
concentration
contact
time
5
h,
showed
high
removal
efficiency
approaching
100
%.
sulfonated
maximum
adsorption
518.49
mg/g,
which
is
six
times
larger
than
pristine
PAN.
Langmuir
model
properly
represented
isotherm
data,
however
kinetics
data
better
described
by
pseudo-second-order
model.
Based
on
calculated
thermodynamic
characteristics,
process
CV
surface
spontaneous
exothermic.
