Particuology,
Год журнала:
2023,
Номер
87, С. 179 - 193
Опубликована: Авг. 25, 2023
The
primary
objective
of
this
research
was
to
assess
the
potential
magnetic
bleached
biochar
(MBBC)
as
a
cost-effective
adsorbent
for
arsenic
removal.
To
achieve
this,
locally
collected
tea
wastes
underwent
meticulous
cleaning,
bleaching,
and
modifications
via
thermal
chemical
treatments.
Both
non-magnetic
adsorbents
were
thoroughly
characterized
using
Fourier
transform-infrared
spectroscopy
(FT-IR)
thermo-gravimetric
analysis
(TGA).
Subsequently,
adsorptive
performance
MBBC
in
removing
from
wastewater
samples
investigated,
considering
various
crucial
parameters
such
adsorbent-adsorbate
contact
time,
concentration
As,
temperature,
dosage,
regeneration-ability
adsorbent.
experimental
data
adsorption
process
best
represented
by
Langmuir
isotherm,
indicating
its
suitability
Remarkably,
demonstrated
maximum
capacity
approximately
714
mg/g
at
room
highlighting
efficiency
an
Furthermore,
Lagergren's
Pseudo-second
order
kinetic
model
proved
be
most
suitable
describing
kinetics,
confirming
chemisorption
nature
process.
results
also
indicated
that
is
endothermic
feasible,
suggesting
viability
practical
applications.
Taking
all
findings
into
account,
comprehensive
strongly
supports
use
highly
promising
efficiently
aqueous
samples.
This
contributes
valuable
insights
field
treatment
offers
sustainable
environmentally
friendly
solution
tackling
contamination
water
sources.
Scientific Reports,
Год журнала:
2022,
Номер
12(1)
Опубликована: Ноя. 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,
Год журнала:
2023,
Номер
9(5), С. e16067 - e16067
Опубликована: Май 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.
