Scientific Reports,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: Aug. 18, 2023
There
has
been
a
lot
of
attention
on
water
pollution
by
dyes
in
recent
years
because
their
serious
toxicological
implications
human
health
and
the
environment.
Therefore,
current
study
presented
novel
polyethylene
glycol-functionalized
graphene
oxide/chitosan
composite
(PEG-GO/CS)
to
remove
from
aqueous
solutions.
Several
characterization
techniques,
such
as
SEM,
TEM,
FTIR,
TGA/DTG,
XRD,
XPS,
were
employed
correlate
structure-property
relationship
between
adsorption
performance
PEG-GO/CS
composites.
Taguchi's
(L25)
approach
was
used
optimize
batch
process
variables
[pH,
contact
time,
adsorbent
dose,
initial
concentration
methyl
orange
(MO)]
for
maximal
capacity.
pH
=
2,
time
90
min,
dose
10
mg/10
mL,
MO
200
mg/L
found
be
optimal.
The
material
maximum
capacity
271
mg/g
at
room
temperature.
With
greatest
R2
0.8930
values,
Langmuir
isotherm
model
shown
most
appropriate.
Compared
pseudo-first-order
(R2
0.9685),
pseudo-second-order
0.9707)
better
fits
kinetic
data.
Electrostatic
interactions
dominant
mechanism
underlying
sorption
onto
PEG/GO-CS
composite.
as-synthesized
reusable
up
three
cycles.
Thus,
fabricated
through
simple
procedure
may
other
similar
organic
real
contaminated
water.
Scientific Reports,
Journal Year:
2022,
Volume and Issue:
12(1)
Published: Nov. 12, 2022
Abstract
In
this
work,
the
synthesis
of
an
rGO/nZVI
composite
was
achieved
for
first
time
using
a
simple
and
green
procedure
via
Atriplex
halimus
leaves
extract
as
reducing
stabilizing
agent
to
uphold
chemistry
principles
such
less
hazardous
chemical
synthesis.
Several
tools
have
been
used
confirm
successful
SEM,
EDX,
XPS,
XRD,
FTIR,
zeta
potential
which
indicated
fabrication
composite.
The
novel
compared
with
pristine
nZVI
removal
aptitude
doxycycline
antibiotic
different
initial
concentrations
study
synergistic
effect
between
rGO
nZVI.
adsorptive
bare
90%
conditions
25
mg
L
−1
,
°C,
0.05
g,
whereas
by
reached
94.6%
confirming
rGO.
adsorption
process
followed
pseudo-second
order
well-fitted
Freundlich
models
maximum
capacity
31.61
g
at
°C
pH
7.
A
plausible
mechanism
DC
suggested.
Besides,
reusability
confirmed
having
efficacy
60%
after
six
successive
cycles
regeneration.
Heliyon,
Journal Year:
2023,
Volume and Issue:
9(5), P. e16067 - e16067
Published: May 1, 2023
Environmental
pollution
by
organic
pollutants
because
of
population
growth
and
industrial
expansion
is
a
global
concern.
Following
this,
the
fabrication
single
efficient
nanomaterials
for
control
highly
demanded.
Under
this
study,
stable
copper
oxide
nanoparticles
(CuO
NPs)
were
synthesized
through
green
method
using
Moringa
stenopetala
seed
extract.
XRD,
UV–vis,
FT-IR,
SEM
applied
to
characterize
material.
From
XRD
data,
average
particle
size
was
found
be
6.556
nm,
are
crystalline
in
nature.
The
formation
CuO
NPs
demonstrated
FT-IR
spectra
Cu–O
different
bending
vibration
bands
at
535
cm-1
1122
cm-1,
as
well
stretching
1640
cm-1.
UV–visible
spectroscopic
measurements,
energy
band
gap
greenly
1.73
eV.
result
shows
that
nanoparticles'
surfaces
rough,
with
some
particles
having
spherically
random
orientation.
photodegradation
efficiency
photocatalyst
98.35%
Congo
red
optimum
experimental
parameters
(initial
concentration,
25
mg/L;
exposure
time,
120
min;
catalyst
dose,
0.2
g;
pH,
5)
95.4%
Alizarin
Red
S
(catalyst
0.25
initial
40
4.6).
COD
values
determined
degraded
product
strongly
support
complete
mineralization
dyes
toward
nontoxic
materials.
Reusability
investigated
five
cycles,
results
clearly
indicate
stable,
can
used
several
times,
cost-effective
well.
degradation
on
surface
follows
MBG
kinetic
model.
