Sustainability,
Journal Year:
2023,
Volume and Issue:
15(8), P. 6734 - 6734
Published: April 17, 2023
In
this
work,
the
use
of
agricultural
waste
from
oil
palm
petioles
(OPP)
as
a
raw
material
for
production
activated
carbon
(AC)
and
its
characterization
were
examined.
By
soaking
these
chars
in
nitric
acid
(HNO3)
potassium
hydroxide
(KOH)
at
10%
concentration,
AC
with
favorable
high-porosity
carbons
was
generated.
To
maximize
synthesis,
pyrolyzed
460,
480,
500
°C
temperatures
20
min.
Based
on
micrographs
formed
pores
surface
functional
groups,
480
carbonization
temperature
both
chemical
HNO3
KOH
shown
to
be
best.
The
FTIR
measurements
reveal
that
activation
successfully
transformed
into
AC.
Moreover,
FESEM
show
cavities
prepared
achieve
high
area.
This
is
further
supported
by
BET
results
OPP
areas
883.3
372.4
m2/g,
respectively,
compared
area
0.58
m2/g.
Furthermore,
tests
revealed
an
optimization
model,
namely
response
methodology
(RSM),
using
central
composite
design
(CCD)
technique.
findings
showed
all
three
parameters
(pH,
time,
dose)
had
substantial
impact
removal
Zn,
Fe,
Mn.
Analysis
variance
(ANOVA)
analytical
error
indicated
models
accurate,
low
value
R2
>
0.9.
Remarkably,
good
correlation
between
actual
predicted
values
modified
promising
adsorbent
heavy
metal
wastewater.
Sustainability,
Journal Year:
2023,
Volume and Issue:
15(3), P. 2431 - 2431
Published: Jan. 30, 2023
Water
quality
is
under
constant
threat
worldwide
due
to
the
discharge
of
heavy
metals
into
water
from
industrial
waste.
In
this
report,
we
introduce
a
potential
candidate,
chitosan,
extracted
and
isolated
shrimp
shells,
that
can
adsorb
polluted
water.
The
waste
shell
chitosan
was
characterized
via
Fourier
transform
infrared
spectroscopy
(FTIR)
scanning
electron
microscopy
with
energy
dispersive
X-ray
(SEM-EDS).
adsorption
capacity
on
modified
measured
using
an
inductively
coupled
plasma
mass
spectrometry
before
after
adsorption.
highest
arsenic,
nickel,
cobalt
98.50,
74.50,
47.82%,
respectively,
at
neutral
pH,
whereas
chromium
97.40%
pH
3.
Correspondingly,
maximum
capacities
MSS
for
As,
Cr,
Ni,
Co
were
observed
be
15.92,
20.37,
7.00,
6.27
mg/g,
respectively.
application
Langmuir
Freundlich
isotherm
models
revealed
processes
statistically
significant
(r2
>
0.98).
kinetic
studies
metal
adsorption,
shell,
well
explained
by
pseudo-second-order
model
linear
coefficients
(r2)
>0.97.
presence
greater
number
functional
groups
adsorbent,
such
as
N–H
H–O,
–COO−,
C–H,
N–N,
C–O–C,
confirmed
FTIR
analyses.
Furthermore,
SEM-EDX
analysis
detected
elements
surface
chitosan.
This
noteworthy
suggests
could
serve
promising,
eco-friendly,
low-cost
adsorbent
removing
toxic
including
used
in
many
broad-scale
applications
clean
wastewater.
International Journal of Chemical Engineering,
Journal Year:
2024,
Volume and Issue:
2024, P. 1 - 17
Published: Feb. 17, 2024
Biomass
pyrolysis
for
oil
production
results
in
biochar
byproduct,
whose
characteristics
can
be
improved
by
the
reuse
of
waste
plastics.
While
plastic
recycling
process
leads
to
a
large
amount
that
cannot
reused,
this
underutilized
feedstock
holds
potential
coprocessing
with
biomass,
thereby
increasing
likelihood
producing
valuable
products.
This
study
sought
evaluate
how
inclusion
influences
biomass
residue.
To
end,
sawdust
and
hardwood
were
chosen
as
materials
investigate
presence
plastics
might
alter
properties
resulting
chars.
Synergies
observed
among
components,
particularly
samples
higher
lignin
content
from
which
resulted
increased
yields.
The
showed
20%
blend
wood
at
300°C
produced
solid
char
yield
40%
weight.
Co-pyrolysis
derived
blends
20
wt.
%
PP
both
significant
enhancement
various
biochar,
including
surface
area,
carbon
content,
hydrophobicity,
aromaticity.
had
favorable
effect
on
calorific
values
biochar.
These
enhanced
significantly
contributed
biochar’s
capacity
sorbing
substances
like
heavy
metals.
It
proved
result
importance
energy
its
use
renewable
applications.
beneficial
combined
seen
credited
interaction
between
polymer
fewer
volatile
products
temperatures.
suggested
biowaste
not
only
reduces
environmental
impact
but
also
converts
it
into
eco-friendly
product.
Chemical Engineering Science,
Journal Year:
2023,
Volume and Issue:
286, P. 119664 - 119664
Published: Dec. 23, 2023
Selective
copper
recovery
from
tailings
reduces
environmental
pollution
caused
by
mining
activities
and
provides
a
valuable
source
of
copper.
Furthermore,
polymer
waste
accumulation
handling
small
functional
materials
like
resins
remains
challenging.
In
this
study,
3D-printed
adsorbent
for
selective
was
designed
functionalizing
recycled
with
chelating
resin
3D-printing
using
laser
sintering
technique.
The
characterized,
its
adsorption
performance
examined
under
varying
conditions.
kinetics
isotherm
fitted
well
to
the
pseudo-second-order
Langmuir
models,
suggesting
chemical
monolayer
processes.
FTIR
indicated
coordination
as
possible
mechanism.
Thermodynamics
revealed
an
endothermic
process.
demonstrated
excellent
Cu(II)
adsorption,
high
selectivity
towards
Cu(II),
reusability.
This
work
offers
promising
recovery,
while
also
addressing
particle
issues.
ChemEngineering,
Journal Year:
2024,
Volume and Issue:
8(3), P. 58 - 58
Published: June 6, 2024
Magnetic
nanosorbents
efficiently
capture
substances,
particularly
basic
dyes,
and
can
be
easily
recovered
using
a
magnetic
field
in
water
treatment.
Adsorption
is
cost-effective
highly
efficient
method
for
dye
removal.
This
study
compared
eight
nonlinear
kinetic
adsorption
models
Microsoft
Excel
2023,
which
provided
detailed
analysis
statistical
results
comparable
to
advanced
programs
like
MATLAB
OriginPro.
The
Fractal
Like-Pseudo
First
Order
(FL-PFO)
model
showed
the
best
fit
model,
closely
predicting
experimental
data
at
33.09
mg
g−1.
suggests
that
diffusion
rate
of
within
nanosorbent
pores
crucial
factor.
parameters
confirmed
suitability
these
describing
observed
behavior.
Overall,
emerged
as
reliable
tool
behavior
various
removal,
offering
wide
range
functions
diverse
applications,
including
environmental
monitoring
modeling.
Corrected
Akaike’s
information
criterion
was
used
determine
optimal
model.
It
found
lowest
AICcorrected
value
about
−3.8479
FL-PFO
while
Elovich
had
highest
29.6605.
indicates
effectively
correlated
data.
concluded
Excel’s
accessibility,
familiarity,
broad
capabilities
make
it
valuable
resource
many
aspects
engineering.
Water,
Journal Year:
2024,
Volume and Issue:
16(17), P. 2384 - 2384
Published: Aug. 25, 2024
This
study
investigates
the
removal
of
heavy
metals,
particularly
copper
and
nickel,
from
acidic
aqueous
solutions
using
weakly
base
polymeric
chelating
resin
Dowex
M-4195.
The
research
conducts
comprehensive
cost–benefit
statistical
analyses
various
kinetic
isotherm
adsorption
models.
results
show
that
PSO
general
order
models
provide
high
accuracy
for
Cu2⁺
kinetics,
while
Avrami
fractional
model
excels
Ni2⁺.
In
terms
models,
Langmuir
Jovanovic
are
highly
accurate
both
with
Toth
being
effective
Ni2⁺
due
to
its
ability
account
surface
heterogeneity
multi-layer
adsorption.
also
reveals
process
is
more
economically
beneficial
than
process,
highlighting
importance
selection
optimizing
metal
removal.
Incorporating
circular
economy
principles,
this
emphasizes
sustainability
regenerable
reusable
adsorbents
like
findings
valuable
insights
designing
efficient
systems,
promoting
environmental
sustainability,
ensuring
public
health
safety.