ACS Omega,
Journal Year:
2023,
Volume and Issue:
8(7), P. 6376 - 6390
Published: Feb. 13, 2023
This
work
is
dedicated
to
the
synthesis,
characterization,
and
adsorption
performance
of
reduced
graphene
oxide-modified
spinel
cobalt
ferrite
nanoparticles.
The
as-synthesized
oxide
(RGCF)
nanocomposite
has
been
characterized
using
FTIR
spectroscopy,
FESEM
coupled
with
EDXS,
XRD,
HRTEM,
zeta
potential,
vibrating
sample
magnetometer
(VSM)
measurements.
proves
particle
size
in
range
10
nm.
FESEM,
EDX,
TEM,
FTIR,
XPS
analyses
provide
proof
successful
incorporation
rGO
sheets
crystallinity
phase
nanoparticles
have
shown
by
XRD
results.
saturation
magnetization
(Ms)
was
measured
as
23.62
emu/g,
proving
superparamagnetic
behavior
RGCF.
abilities
synthesized
tested
cationic
crystal
violet
(CV)
brilliant
green
(BG)
anionic
methyl
orange
(MO)
Congo
red
(CR)
dyes.
trend
for
MO,
CR,
BG,
As(V)
follows
RGCF
>
CF
at
neutral
pH.
Adsorption
studies
accomplished
optimizing
parameters
like
pH
(2-8),
adsorbent
dose
(1-3
mg/25
mL),
initial
concentration
(10-200
mg/L),
contact
time
constant
room
temperature
(RT).
To
further
investigate
sorption
behavior,
isotherm,
kinetics,
thermodynamic
conducted.
Langmuir
isotherm
pseudo-second-order
kinetic
models
suited
better
dyes
heavy
metals.
maximum
capacities
(qm)
obtained
found
1666.7,
1000,
416.6,
222.2
mg/g
As,
respectively,
operational
such
T
=
298.15
K;
dose:
1
mg
MO
1.5
each
As.
Thus,
be
an
excellent
removal
ChemistrySelect,
Journal Year:
2024,
Volume and Issue:
9(11)
Published: March 15, 2024
Abstract
The
global
manufacturing
sector
heavily
relies
on
the
textile
industry,
yet
widespread
utilization
of
synthetic
dyes
within
this
has
raised
serious
environmental
apprehensions,
notably
regarding
wastewater
contamination.
release
untreated
containing
residual
poses
a
significant
risk
to
both
aquatic
ecosystems
and
human
well‐being.
In
reaction
issue,
considerable
efforts
have
been
made
develop
efficient
sustainable
methods
for
removal
from
wastewater.
This
comprehensive
review
paper
furnishes
in‐depth
literature
information
covering
various
aspects
dyes,
including
their
classification,
toxicity
effects,
evaluation
recent
advancements
in
dye
technology,
emphasizing
advantages,
limitations,
future
potential.
Various
strategies
are
covered,
physical,
chemical,
biological
methods.
Physical
techniques
like
adsorption,
filtration,
membrane
technologies
contrasted
with
chemical
approaches
such
as
coagulation,
precipitation,
advanced
oxidation
processes.
Biological
include
micro‐organisms,
fungi,
enzymes
break
down
or
metabolize
compounds.
Key
considerations
critical
analysis
efficiency,
cost‐effectiveness,
scalability
each
method.
focuses
enzyme
breakdown
(biological)
adsorption
(physical)
color
procedures,
which
currently
considered
most
effective.
It
also
proposes
composite
adsorbent,
anticipating
enhanced
efficiency
faster
through
technique.
International Journal of Environmental Research and Public Health,
Journal Year:
2022,
Volume and Issue:
19(16), P. 9962 - 9962
Published: Aug. 12, 2022
Water
pollution
due
to
textile
dyes
is
a
serious
threat
every
life
form.
Bacteria
can
degrade
and
detoxify
toxic
present
in
effluents
wastewater.
The
study
aimed
evaluate
the
degradation
potential
of
eleven
bacterial
strains
for
azo
dye
methyl
red.
optimum
efficiency
was
obtained
using
P.
aeruginosa.
It
found
from
initial
screening
results
that
aeruginosa
most
potent
strain
with
81.49%
activity
hence
it
subsequently
used
other
experiments.
To
optimize
conditions,
number
experiments
were
conducted
where
only
one
variable
varied
at
time
maximum
observed
20
ppm
concentration,
1666.67
mg/L
glucose
666.66
sodium
chloride
pH
9,
temperature
40
°C,
1000
urea
3
days
incubation
period,
66.66
hydroquinone
(redox
mediator).
interactive
effect
pH,
time,
temperature,
concentration
second-order
quadratic
optimization
process
conditions
further
enhance
biodegradation
by
88.37%.
metabolites
aliquot
mixture
optimized
analyzed
Fourier
transform
infrared
(FTIR),
GC-MS,
proton,
carbon
13
Nuclear
Magnetic
Resonance
(NMR)
spectroscopic
techniques.
FTIR
confirmed
reduction
bond
Gas
Chromatography-Mass
Spectrometry
(GC-MS)
revealed
degraded
contains
benzoic
acid
o-xylene
as
predominant
constituents.
Even
isolated
silica
gel
column
identified
1H
13C
NMR
spectroscopy.
These
indicated
be
utilized
an
efficient
detoxification
remediation
industrial
wastewater
containing
red
dyes.
International Journal of Molecular Sciences,
Journal Year:
2022,
Volume and Issue:
23(18), P. 10637 - 10637
Published: Sept. 13, 2022
The
azo
dye
orange
II
is
used
extensively
in
the
textile
sector
for
coloring
fabrics.
High
concentrations
of
it
are
released
into
aqueous
environments
through
effluents.
Therefore,
its
removal
from
wastewater
and
effluents
necessary.
Herein,
initially,
we
tested
11
bacterial
strains
their
capabilities
degradation
dye.
It
was
revealed
preliminary
data
that
B.
subtilis
can
more
potently
degrade
selected
dye,
which
thus
subsequent
experiments.
To
achieve
maximum
decolorization,
experimental
conditions
were
optimized
whereby
achieved
at:
a
25
ppm
concentration,
pH
7,
temperature
35
°C,
1000
mg/L
concentration
glucose,
urea
666.66
NaCl
an
incubation
period
3
days,
with
hydroquinone
as
redox
mediator
at
66.66
mg/L.
effects
interaction
operational
factors
further
confirmed
using
response
surface
methodology,
optimum
6.45,
17.07
mg/L,
time
9.96
h
45.38
be
obtained
desirability
coefficient
1,
estimated
central
composite
design
(CCD).
understand
underlying
principles
metabolites
aliquot
mixture
condition,
study
steps
extracted
analyzed
GC-MS(Gas
Chromatography
Mass
Spectrometry),
FTIR(Fourier
Transform
Infrared
Spectroscopy),
1H
carbon
13
NMR(Nuclear
Magnetic
Resonance
Spectroscopy).
GC-MS
pattern
original
degraded
o-xylene
naphthalene.
Naphthalene
even
pure
state
silica
gel
column
isolation
13C
NMR
spectroscopic
analysis.
Phytotoxicity
tests
on
Vigna
radiata
also
conducted
results
less
toxic
than
parent
These
emphasize
should
potential
strain
bioremediation
containing
other
dyes.
Minerals,
Journal Year:
2023,
Volume and Issue:
13(3), P. 438 - 438
Published: March 19, 2023
In
this
work,
activated
carbon
(referred
to
as
MCAC)
was
produced
by
microwave
radiation
assisted
ZnCl2
activation
using
Malaysian
coal
(MC)
a
precursor.
The
Brunauer–Emmett–Teller
findings
indicate
that
the
MCAC
has
relatively
large
surface
area
(798.18
m2/g)
and
mesoporous
structure
(average
pore
diameter
of
3.67
nm).
removal
Methylene
Violet
(MV
2B)
cationic
dye
model,
employed
investigate
adsorption
properties
MCAC.
A
numerical
desirability
function
in
Box–Behnken
design
(BBD)
optimize
independent
crucial
variables
follows:
A:
dose
(0.02–0.1
g);
B:
pH
(4–10);
C:
time
(5–25
min).
results
equilibrium
dynamic
showed
MV
2B
followed
Freundlich
pseudo-second
order
models,
respectively.
maximum
amount
could
adsorb
(qmax)
134.1
mg/g.
Electrostatic
interactions,
π-π
stacking,
H-bonding,
diffusion
contribute
onto
surface.
This
study
demonstrates
potential
utilize
MC
low-cost
precursor
for
efficient
synthesis
MAC
its
utility
pollutants.
