Heliyon,
Journal Year:
2023,
Volume and Issue:
9(12), P. e22447 - e22447
Published: Nov. 20, 2023
Methyl
orange
is
abundantly
present
in
wastewater
generated
from
textile
industries
causing
serious
human
health
and
environmental
problems.
Therefore,
this
study
was
aimed
at
preparing
a
low
cost
effective
biosorbent
the
stem
of
Rumex
abyssinicus
plant
for
removal
methyl
aqueous
solution.
Characterization
prepared
adsorbent
material
carried
out
using
pH
point
zero
charge,
Scanning
Electron
microscope
(SEM),
Fourier
Transform
Infrared
(FTIR)
spectroscopy
X-Ray
Diffraction
(XRD).
The
design
optimization
batch
adsorption
Box
Behnken
approach
to
Response
Surface
methodology
aiming
reduce
experimental
runs
time
with
adequate
results.
characterization
revealed
7.9
(pHpzc),
porous
heterogonous
surface
presence
multiple
functional
groups
amorphous
structure
maximum
efficiency
98.5
%
found
pH,
contact
time,
concentration
dosage
6,
60
min,
20
mg/L
0.2
g/100
mL
respectively.
isotherm
studies
were
Langmuir,
Freundlich,
Toth
Koble
Corrigan
models
which
Freundlich
R2
0.95
fit
data
best
showing
heterogeneous
multilayer
interaction.
On
other
hand,
kinetics
that
pseudo-second-order
fitted
best.
Moreover,
thermodynamics
analysis
showed
nature
be
endothermic,
spontaneous
feasible.
Generally,
work
proved
low-cost,
environmentally
friendly
easily
abyssinicus-based
could
an
alternative
dye
detoxification
industrial
scale.
Molecules,
Journal Year:
2023,
Volume and Issue:
28(3), P. 1081 - 1081
Published: Jan. 21, 2023
Dye
and
nitro-compound
pollution
has
become
a
significant
issue
worldwide.
The
adsorption
degradation
of
dyes
nitro-compounds
have
recently
important
areas
study.
Different
methods,
such
as
precipitation,
flocculation,
ultra-filtration,
ion
exchange,
coagulation,
electro-catalytic
been
adopted
for
the
these
organic
pollutants.
Apart
from
adsorption,
photocatalytic
degradation,
chemical
are
considered
most
economical
efficient
to
control
water
nitro-compounds.
In
this
review,
different
kinds
nitro-compounds,
their
adverse
effects
on
aquatic
organisms
human
beings,
were
summarized
in
depth.
This
review
article
covers
comprehensive
analysis
over
materials
(porous
polymer,
carbon-based
materials,
clay-based
layer
double
hydroxides,
metal-organic
frameworks,
biosorbents).
mechanism
kinetics
dye
central
parts
structures
all
mentioned
above
discussed,
along
with
main
functional
groups
responsible
adsorption.
Removal
also
aim
article,
well
used
degradation.
mechanisms
explained
comprehensively.
factors
highlighted.
Advantages
disadvantages,
economic
cost,
discussed
briefly.
will
be
beneficial
reader
it
aspects
Future
shortcomings
part
article.
There
several
articles
topics,
but
study
not
performed
so
far
literature.
Journal of Hazardous Materials Advances,
Journal Year:
2024,
Volume and Issue:
14, P. 100429 - 100429
Published: April 25, 2024
Graphene
oxide-based
nickel-iron
superparamagnetic
nanoadsorbent
(GO/Ni-Fe)
was
synthesized
from
electronic
waste
to
effectively
remove
doxycycline
(DXC)
in
aqueous
media.
The
GO/Ni-Fe
has
been
characterized
using
a
number
of
instrumental
techniques,
including
X-ray
diffractometer,
Zeta
potential,
Fourier
transform
infrared
spectroscopy,
elemental
analyzer,
vibrating
sample
magnetometer,
transmission
electron
microscopy,
energy
dispersive
x-ray,
and
photoelectron
spectroscopy.
These
techniques
showed
that
(Ni-F)
nanoparticles
with
an
average
size
4.26
nm
were
successfully
fabricated
on
GO
surfaces.
batch
experiments
conducted
under
different
conditions,
contact
time,
adsorption
dosage,
pH,
concentration,
temperature,
determine
the
optimal
conditions
process.
maximum
(90%
removal)
established
within
20
min,
while
adsorbent
dose
only
0.1
g/L
at
pH
5.
process
best
fitted
pseudo-second-order
model,
which
suggests
interaction
is
mainly
controlled
by
chemisorption
This
may
be
due
hydrogen
bonding
as
well
electrostatic
π-π
between
adsorbates
adsorbents.
isotherm
data
Langmuir
models
capacity
13.02
mg
g−1
25°C
indicating
monolayer
heterogeneous
surfaces
interaction.
properties
can
easily
separated
external
magnetic
field
regenerated
methanol
washing.
findings
unambiguously
demonstrated
magnetically
separable
nanoadsorbents
could
good
choice
DXC
wastewater
sources.
