Materials,
Год журнала:
2024,
Номер
17(24), С. 6264 - 6264
Опубликована: Дек. 21, 2024
This
paper
presents
the
numerical
analysis
of
influence
air
flow
rate
on
porous
structure
development
activated
carbons
prepared
from
macadamia
nut
shells.
The
analyses
based
nitrogen
and
carbon
dioxide
isotherms
were
carried
out
by
new
clustering-based
adsorption
method.
Therefore,
it
was
possible
to
evaluate
with
high
precision
reliability.
In
particular,
results
obtained
showed
that
at
an
700
cm3/min
has
highest
capacity
respect
this
adsorbate,
but
surface
heterogeneity.
On
other
hand,
towards
is
sample
500
cm3/min.
conducted
have
shown
too
causes
a
violent
oxidation
reaction,
leading
uncontrolled
burning
carbonaceous
substance
destruction
smallest
micropores.
Applied Water Science,
Год журнала:
2025,
Номер
15(4)
Опубликована: Март 13, 2025
Abstract
This
study
explores
the
potential
of
utilizing
weathered
basalt
waste,
discarded
from
stone
quarrying,
as
a
resource
for
producing
efficient
adsorbents
to
remove
Fe
(III)
and
Zn
(II)
aqueous
real
wastewater.
Raw
(RWB),
its
calcined
derivatives
at
750
°C
3
h
(CWB-750)
950
1
with
activated
carbon
impregnation
(CWB/AC-950),
were
prepared
characterized.
Characterization
using
XRD,
FTIR,
SEM,
surface
area
analyzer
revealed
that
calcination
improved
porosity
some
privilege
CWB/AC-950.
CWB/AC-950
remarkable
removal
efficiency
pH
value
5,
achieving
98.30%,
closely
matching
RWB
(98.00%),
outperforming
CWB-750
(96.20%).
In
contrast,
exhibited
highest
capacity
6,
an
55%,
surpassing
both
CWB/AC-950,
which
achieved
approximately
36%.
For
contaminants,
Pseudo-2nd-order
equation
(
R
2
>
0.98)
provided
superior
fit,
showcasing
favorable
sorption
process
by
all
addressed
materials.
The
Fe(III)
data
investigated
materials
better
described
Freundlich
(FL)
model
compared
Langmuir
(LM)
model.
Similarly,
Zn(II)
(CWB-750
CWB/AC-950)
well-explained
FL
These
findings
are
supported
very
high
determination
coefficients
0.96)
significantly
lower
average
relative
error
(ARE)
values
(8.66
13.69)
those
obtained
LM
(55.99
189.25,
orderly).
RWB,
despite
(>
models,
neither
adequately
captured
behavior,
evidenced
exceptionally
ARE
(52.67
161.19
FL,
respectively).
remediation
mechanism
was
not
exclusively
governed
inter-particle
diffusion.
Eventually,
these
highlight
sustainable
repurposing
waste
water
applications.
Beni-Suef University Journal of Basic and Applied Sciences,
Год журнала:
2024,
Номер
13(1)
Опубликована: Июль 2, 2024
Abstract
Background
Presently,
the
proper
disposal
of
E-waste
is
a
major
challenge
for
all
nations.
Portland
cement
and
aggregates
continue
to
play
role
in
construction
industry's
operations.
Meanwhile,
natural
resources
like
gravel
(aggregates)
are
becoming
scarce.
Thus,
now
offering
building
industry
chance
replace
traditional
aggregates.
The
main
goal
current
study
determine
highest
amount
that
may
be
replaced
with
10-mm
coarse
nano-silica
associated
ternary
blend
M-60
grade
high-strength
concrete
while
still
maintaining
designed
concrete's
mechanical,
durability,
microstructural
workability
characteristics.
Results
When
compared
normal
concrete,
15%
replacement
maintained
design-required
compressive,
flexural
tensile
strength
properties.
plastic
component
percentage
considerably
high
(15–30%),
there
significant
decremental
performance
regarding
mechanical
properties
rate
found
range
13–23%.
Even
microstructure
characteristics
validate
concrete.
Nevertheless,
durability
incorporated
were
promising.
Conclusions
overall
outcome
recommends
as
optimal
conventional
it
recommended
adopt
real-time
practices.
Arabian Journal for Science and Engineering,
Год журнала:
2024,
Номер
50(5), С. 3373 - 3386
Опубликована: Авг. 5, 2024
Abstract
This
study
comprehensively
evaluates
the
radiation
attenuation
efficiencies
of
hematite
and
barite,
commonly
used
materials
in
shielding,
using
theoretical
simulation
investigations.
The
MCNP-5
code
was
to
obtain
linear
coefficient
(LAC)
within
energy
range
0.015–15
MeV,
with
validation
by
XCOM
program.
Based
on
these
LAC
values,
various
gamma-ray
shielding
parameters
were
determined:
mass
coefficient,
half-value
layer,
protection
capacity,
mean
free
path,
transmission
factor,
equivalent
thickness
lead
(ET
Pb
).
Additionally,
effective
atomic
number
(Z
eff
)
electron
density
(N
calculated,
including
both
single-energy
energy-dependent
forms
for
photon
absorption
interaction.
Furthermore,
simulations
NGCal
program
calculations
assess
thermal
neutron
attenuation,
while
NXcom
determined
fast
behavior.
analysis
revealed
superior
γ-ray
barite
compared
hematite.
Similarly,
indicated
better
barite.
However,
interestingly,
validated
a
210%
higher
effectiveness
Finally,
comparing
studied
other
demonstrated
promising
potential
as
environmentally
friendly
alternatives
against
types.
