Vietnam Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 25, 2024
Abstract
Alfalfa
leaf
leftovers,
a
biomass
waste
from
agriculture,
were
evaluated
in
this
work
as
sorbent
plant
matter
for
oil
elimination
seawater
before
desalination
units.
At
2
min
and
0.25
g
dosage,
the
exothermic
(∆
H
:
−51.55
kJ.mol
−1
)
system's
maximal
removal
was
90%,
an
adsorption
capacity
of
1.76
g/g
attained.
The
uptake
formfitting
using
pseudo‐first‐order
kinetic
(
R
=
0.9955)
model
Langmuir
0.93292)
with
Hill
0.98216)
isotherms,
according
to
results
isotherm
investigations
conducted
on
sorption
outcomes.
Also,
economic
recycling
leftovers
decreased
less
than
50%
after
two
adsorption–desorption
cycles.
Leftover
alfalfa
leaves
have
good
oil‐adsorbing
properties
that
make
them
suitable
adsorbent
material
cleaning
up
spills
used
systems
purify
water
oil.
Nuclear Engineering and Technology,
Journal Year:
2024,
Volume and Issue:
56(7), P. 2444 - 2451
Published: Feb. 10, 2024
This
work
demonstrates
a
new
sol-gel
approach
for
synthesizing
PbO2-doped
zirconia
using
zircon
mineral
precursors.
The
streamlined
methodology
enables
straightforward
fabrication
of
the
doped
composites.
Comprehensive
materials
characterization
was
performed
XRD,
SEM,
and
TEM
techniques
to
analyze
crystal
structure,
microstructure,
morphology.
Quantitative
analysis
XRD
data
provided
insights
into
nanoscale
crystallite
sizes
achieved,
along
with
their
relationship
lattice
imperfections.
Furthermore,
gamma-ray
shielding
capacity
samples
estimated
by
Monte
Carlo
simulation,
which
proves
an
increase
in
gamma
ray
properties
raising
Pb
concentration.
linear
attenuation
coefficient
increased
between
0.467
0.499
cm−1
(at
0.662
MeV)
increasing
content
11
21
wt%.
By
wt%,
synthesized
composites'
lead
equivalent
thickness
reaches
2.49
cm.
radiation
composites
revealed
remarkable
performance
against
low
intermediate
γ-ray
photons,
37.3
%
21.4
at
MeV
2.506
MeV,
respectively.
As
result,
developed
can
be
employed
as
alternative
material
hospitals
radioactive
zones.
Desalination and Water Treatment,
Journal Year:
2024,
Volume and Issue:
317, P. 100210 - 100210
Published: Jan. 1, 2024
This
study
looked
into
the
removal
of
heavy
metals
from
aqueous
systems
using
carbon
obtained
grape
wood,
an
agricultural
waste.
Activated
was
created
by
pyrolyzing
and
activating
wood.
Characterization
material
showed
a
highly
porous
structure
with
large
number
surface
oxygen
groups.
In
batch
investigations,
optimal
conditions
(pH
5,
25°C,
100
mg
L-1
starting
Pb2+)
resulted
in
all-out
lead
uptake
capability
135.7
g-1.
60
minutes,
over
90%
removed
at
pseudo-second-order
rate
1.894×10-4
g
mg-1min-1.
Adsorption
had
293.7
g-1,
which
line
Sips
model.
Positive
enthalpy
(70.88
kJ
mol-1)
entropy
(0.2546
kJK-1mol-1)
values
thermodynamic
analysis
suggested
chemisorption.
Using
HCl,
adsorbent
could
be
renewed
up
to
five
times.
