Oriental Journal Of Chemistry,
Journal Year:
2024,
Volume and Issue:
40(5), P. 1405 - 1414
Published: Oct. 31, 2024
Malachite
green
(MG)
is
a
poisonous
and
carcinogenic
dye
that
poses
serious
health
hazards,
even
at
low
levels,
necessitating
its
removal
from
aquatic
ecosystems.
This
study
examines
the
use
of
SnO₂
nanoparticles
as
an
adsorbent
to
remove
MG
systems
investigates
effects
contact
time,
pH,
initial
concentration
on
adsorption
efficiency.
The
were
synthesized
employing
eco-friendly
approach
characterized
using
various
techniques,
including
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM),
Fourier-transform
infrared
spectroscopy
(FTIR),
energy-dispersive
(EDS),
Brunauer-Emmett-Teller
(BET).
results
indicate
have
high
capacity
for
MG,
reaching
up
724
mg/g
with
fast
kinetics.
process
followed
Freundlich
isotherm
model
(R²
=
0.987),
indicating
heterogeneous
mechanism.
However,
kinetic
data
correlated
well
pseudo-second-order
0.999),
supporting
chemisorption
dominant
process.
work
shows
efficiency
nanosorbent
removal,
making
it
feasible
option
environmental
cleaning.
Results in Engineering,
Journal Year:
2024,
Volume and Issue:
21, P. 101910 - 101910
Published: Feb. 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
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Feb. 22, 2024
Abstract
In
this
study,
gold-reduced
graphene
oxide
(Au@rGO)
nanocomposite
has
been
synthesized
by
repurposing
electronic
waste
and
dry
batteries.
This
innovative
approach
involved
utilizing
the
graphite
rod
from
batteries
to
produce
reduced
(rGO),
which
was
subsequently
modified
through
incorporation
of
gold
nanoparticles
obtained
recycled
waste.
methodology
marks
a
significant
breakthrough
in
recycling,
presenting
cost-effective
sustainable
means
creating
novel
nanocomposites
for
applications
photocatalysis
adsorption,
particularly
removal
crystal
violet
(CV)
aqueous
media.
The
Au@rGO
characterized
using
X-ray
diffraction,
scanning
electron
microscopy,
energy
dispersed
X-ray,
N
2
adsorption/desorption.
Parameters
that
affect
adsorption
photocatalytic
degradation
CV
dye
have
studied
detail.
optimal
conditions
were
pH
10,
equilibrium
time
30
min,
concentration
10
mg/L
adsorbent
dosage
40
mg.
Furthermore,
isotherm
kinetics
also
studied.
techniques
reached
95%
99%,
respectively.
Consequently,
results
showed
onto
mesoporous
is
more
proper
way
than
technique
removing
designed
photocatalyst
high
efficiency
it
can
be
reused
activated
several
times
so
used
real
water
treatment
applications.
Environmental Quality Management,
Journal Year:
2024,
Volume and Issue:
34(1)
Published: July 23, 2024
ABSTRACT
In
this
study,
Rhodamine
B
dye
(RhB)
is
effectively
removed
from
aqueous
solutions
by
using
nano‐MgO
and
activated
carbon
as
an
adsorbent.
First,
potassium
hydroxide
was
used
in
a
chemical
activation
process
to
create
the
Anacardium
occidentale
shell,
often
known
cashew
nutshell.
Rosa
cymose
extract
quick
precipitation
nano‐magnesium
oxide
sustainable
way.
Activated
composite
impregnated
with
made
dropwise
process.
The
study
examined
nanocomposite
that
solution.
Using
SEM,
XRD,
FTIR,
EDX,
nano‐Mgo
nano‐MgO‐AC
were
analyzed.
scanning
electron
microscope,
analysis
conducted
on
evenly
distributed
accumulation
of
MgO
nanoparticles
added
carbon.
capability
nano‐MgO‐activated
decolorize
RhB
investigated.
effects
beginning
pH
ranges
2.0–9.0,
initial
concentrations
10–40
ppm,
biosorbent
dosages
0.2–1.2
g,
contact
times
ranging
10
60
min
At
5,
most
eliminated.
work
has
shown
may
be
medium
nano‐MgO‐AC,
it
could
potentially
affordable
adsorbent
material.
Equilibrium
estimations
acknowledged
strongly
through
Langmuir
approximations
correlation
determination
0.985.
Environmental Science and Pollution Research,
Journal Year:
2024,
Volume and Issue:
31(22), P. 32664 - 32679
Published: April 25, 2024
The
adsorption
property
of
the
costless
green
cellulose
acetate
(CA)
was
boosted
by
dual
modifications:
inner
modification
incorporating
carboxylated
graphene
oxide
(COOH-GO)
into
CA
spheres
and
outer
surface
COOH-GO@CA
iminodiacetic
acid
(IDA)
for
removing
Pb(II).
experiments
Pb(II)
proceeded
in
a
batch
mode
to
evaluate
COOH-GO@CA@IDA
spheres.
maximal
capacity
attained
613.30
mg/g
within
90
min
at
pH
=
5.
removal
reached
its
equilibrium
20
min,
%
almost
100%
after
30
low
concentration.
mechanism
proposed
according
kinetics
isotherms
studies;
addition,
zeta
potential
(ZP)
measurements
X-ray
Photoelectron
Spectroscopy
(XPS)
analysis
defined
pathways.
By
comparing
XPS
spectra
authentic
used
COOH-GO@CA@IDA,
it
deduced
that
contributed
chemical
pathways
are
Lewis
acid-base,
precipitation,
complexation.
demonstrated
electrostatic
interaction
participation
adsorbing
cationic
species
onto
negatively
charged
(ZP
14.2
mV
5).
unique
channel-like
pores
suggested
pore-filling
promising
results
superb
recyclability
character
enable
extend
bench
scale
industrial
scale.
