Vietnam Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 25, 2024
Abstract
This
research
proposes
a
practical
method
for
repurposing
used
car
air
filters
as
an
oil‐absorbing
material
saltwater.
The
maximum
oil
removal
rate
obtained
was
99.75%
with
3.325
g/g
absorption
capacity.
It
required
2.5
min
of
exposure
at
sorbent
dose
0.3
g
and
room
temperature
(28
°C)
to
achieve
this
level
effectiveness.
With
R
‐squared
value
0.9796,
the
Redlich–Peterson
model
(
χ
2:
0.0308
β
=
1.1325)
discovered
be
isotherm
that
fit
data
best.
implies
monolayer
is
in
touch
utilized
filters'
surface.
0.9855
2
(0.0200),
pseudo‐first‐order
kinetic
obtainable
greatest
fit.
suggests
physical
sorption
mechanism
driving
process.
Studies
on
thermodynamics
suggested
process
absorbing
exothermic
(∆
H
:
‒157.209
KJ/mol).
According
reusability
study,
can
recycled
up
5
times,
which
indicates
their
potential
economic
significance.
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: Jan. 9, 2025
Abstract
Due
to
the
high
cost
of
raw
materials,
this
work
aims
benefit
from
metal
waste,
especially
iron
(Fe)
and
silicon
bronze,
which
results
turning
workshops
recycling
them
obtain
nanocomposites
for
industrial
applications.
In
respect,
Fe/SiBr/Si
3
N
4
/silica
fume
possessing
superior
mechanical,
wear,
magnetic
characteristics
have
been
produced
using
powder
metallurgy
(PM)
technology.
Milled
sample
particle
size,
crystal
phase
composition
were
investigated
X-ray
diffraction
(XRD)
technique
transmission
electron
microscopy
(TEM).
The
powders
compressed
sintered
in
argon
get
excellent
sinterability.
nanocomposites’
physical,
electrical,
properties
investigated.
microstructure
was
also
examined
field
emission
scanning
(FESEM).
showed
a
noticeable
decrease
size
particles
crystallite
after
adding
reinforcements,
reaching
22
nm
improved
with
5
vol%
silica
Si
(FS4).
addition,
there
clear
improvement
microhardness,
Young’s
modulus,
wear
rate
Fe-SiBr,
58,
27.89,
43.21%
percent
FS4.
Adding
reinforcements
harms
electrical
conductivity
as
it
decreases
8.64
×
10
6
S/m
same
previous
sample.
Finally,
slightly
affects
magnetization
nanocomposites.
Vietnam Journal of Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 23, 2025
Abstract
Aluminum‐based
composites
reinforced
with
ceramics
are
intriguing
subjects
for
both
industry
and
research.
Aluminum
metal
matrix
(Al‐MMCs)
constantly
ready
to
create
new,
unique
property
combinations
that
appropriate
high‐performance
applications.
This
work
involves
using
a
modified
stir
casting
technique
(semi‐solid‐state
route)
prepare
ZrO
2
/Al5052
composites.
alloy
(Al5052)
is
melted
in
an
electric
furnace
then
cooled
slowly
semi‐solid
temperature.
At
this
stage,
pretreated
powders
added
during
the
rotation
of
enhance
incorporation
distribution.
Microstructure
characterization
casted
was
executed
by
optical
microscopy
X‐ray
diffraction
(XRD).
Tensile
microhardness
tests
examined
influence
zirconium
dioxide
on
mechanical
characteristics.
analysis
XRD
patterns
demonstrated
successful
fabrication
Al‐MMCs
uniform
distribution
particles.
The
results
reveal
strength
hardness
enhanced
as
increasing
percentage
maximum
value
tensile
accomplished
12%
dioxide,
which
increased
27.5%
45.7%,
respectively,
over
base
alloy.
