2021 IEEE 13th International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment, and Management (HNICEM),
Journal Year:
2023,
Volume and Issue:
unknown, P. 1 - 6
Processes,
Journal Year:
2023,
Volume and Issue:
11(7), P. 1877 - 1877
Published: June 22, 2023
In
this
laboratory
batch
adsorption
study,
the
raw
pine
tree
leaf
biomass
solid
waste
adsorbent
material
was
used
for
removal
of
methylene
blue
(MB)
dye
from
water
at
different
physicochemical
process
conditions.
The
characteristics
adsorbents
were
determined
particle
size,
surface
area,
existence
functional
group
identification,
and
morphology
surface.
performed
conditions,
which
include
solution
pH,
concentrations,
doses,
temperature,
respectively.
it
found
that
MB
increased
with
increases
in
pH
adsorbate
concentration
but
decreased
doses
temperature
fixed
Langmuir
isotherm
model
best
fitted
experimental
equilibrium
data,
a
higher
linear
regression
coefficient
(R2)
value
99.9%
among
two
widely
Freundlich
equations.
maximum
monolayer
capacity
to
be
36.88
mg/g,
comparable
other
reported
capacities
towards
adsorption.
separation
factor,
RL,
equation
gives
an
indication
favorable
Thermodynamic
parameters
such
as
standard
Gibbs
free
energy
change
(ΔG0),
enthalpy
(ΔH0),
entropy
(ΔS0)
indicated
by
spontaneous
exothermic
nature
mechanism
mainly
physical
Finally,
limitations
future
studies
are
also
discussed
here.
outcome
study
may
result
valorization
locally
available
large
residue
waste,
could
purification.
Applied Sciences,
Journal Year:
2024,
Volume and Issue:
14(2), P. 677 - 677
Published: Jan. 12, 2024
In
the
work,
nanostructured
Fe3O4/C
composites
based
on
natural
raw
materials
(beet
pulp
and
corn
stalks)
are
synthesised
in
various
ways.
Iron
chloride
FeCl3
is
used
as
an
activator.
The
investigated
using
following
methods,
scanning
electron
microscopy,
X-ray
diffractometry,
nitrogen
adsorption/desorption
porometry,
magnetometry,
impedance
galvanostatic
measurements.
presence
of
nanosized
Fe3O4
magnetite
carbon
structures
disclosed.
Based
magnetic
measurements,
particle
size
average
50
nm
for
sample
composite
from
beet
one
step,
30
two
steps,
33
stalks
29
steps.
It
shown
that
two-step
synthesis
pre-carbonised
gives
specific
capacitance
made
with
at
96
F/g,
95
F/g.
high
coulombic
efficiency
(>95%)
stability
electrical
during
long-term
cycling
make
it
possible
to
use
manufacture
supercapacitor
electrodes
aqueous
electrolytes.
Green Processing and Synthesis,
Journal Year:
2025,
Volume and Issue:
14(1)
Published: Jan. 1, 2025
Abstract
Synthetic
dyes
in
wastewater
present
a
challenging
problem
that
requires
special
attention
due
to
the
high
environmental
risks,
and
magnetic
adsorbents
appear
as
promising
alternatives
solve
it.
Magnetic
activated
carbons
(MAC)
were
prepared
by
comparing
single-
multi-step
methods.
Palm
kernel
shells
used
precursors,
with
ZnCl
2
,
then
magnetized
adding
solution
containing
Fe
3+
ions
(FeCl
3
).
Iron
compound
inclusion
aims
enhance
effectiveness
of
carbon
an
adsorbent
for
liquid
waste.
Fourier
transform
infra-red
characterization
showed
functional
groups
detected
on
MAC
O–H,
C═O,
C═C,
C≡N,
C–O.
The
effect
preparation
methods
dye
concentration
(10–30
mg·L
−1
)
adsorption
kinetics
investigated.
Characterization
through
pyrolysis
(M-MAC)
has
larger
pores,
achieving
capacity
up
6.953
mg·g
28%
removal
efficiency,
making
it
superior
performance.
Furthermore,
data
fitted
well
Redlich–Peterson
isotherm
model
R
=
0.9788
M-MAC,
while
agreed
both
pseudo-first-order
pseudo-second-order
models.
Moreover,
NaOH
successfully
recovered
desorption
efficiencies
98.34%.
