Processes,
Journal Year:
2024,
Volume and Issue:
12(12), P. 2901 - 2901
Published: Dec. 18, 2024
This
study
successfully
synthesized
a
polymer
adsorbent
TOC
containing
S
functional
groups
through
thiophene
and
oxalyl
chloride.
The
was
characterized
by
IR,
molecular
weight
determination,
EDS,
SEM,
TG.
For
Pb
(II),
the
maximum
adsorption
capacity
of
can
reach
122.7
mg/g
(0.593
mmol/g)
at
pH
=
4,
250
min.
After
adsorption,
it
be
desorbed
with
1.00
mol/L
HCl,
reused
10
times;
Cu
95.9
(1.498
6,
180
0.50
HNO3,
11
times.
process
on
(II)
conforms
to
Freundlich
model
multi-layer
chemical
is
controlled
pseudo-second-order
kinetic
reactions.
Agriculture,
Journal Year:
2025,
Volume and Issue:
15(5), P. 545 - 545
Published: March 3, 2025
The
detection
of
available
Cr(VI)
in
soil
is
critical
due
to
its
high
uptake
by
plants,
which
enables
it
enter
the
food
chain
and
pose
significant
health
risks
humans.
Traditional
methods
are
often
time-consuming
labor-intensive,
limiting
their
suitability
for
rapid,
on-site
measurements.
This
study
introduces
a
novel
approach
rapid
soil,
utilizing
portable
X-ray
fluorescence
spectrometry
(pXRF)
combination
with
ion-exchange
resin.
method
was
validated
using
samples
from
three
distinct
regions,
representing
different
types.
Compared
conventional
laboratory
methods,
rates
ranged
80.73%
124.14%,
relative
standard
deviations
repeated
analyses
ranging
3.05%
5.73%,
both
comply
national
standards.
Regression
analysis
confirms
strong
linear
relationship
between
spectral
values
concentration
solutions
(R2
=
0.9986).
Through
resin
enrichment,
limit
(LoD)
solution
reaches
0.070
mg/kg,
facilitating
trace-level
soil.
In
contrast
traditional
pXRF-ion-exchange
minimizes
secondary
environmental
contamination,
cost-effective
time-efficient,
does
not
require
complex
pretreatment.
Consequently,
highly
suitable
analysis.
presents
an
innovative
soils.
effectively
reduced
time
simplified
sample
pretreatment,
thus
holds
substantial
potential
practical
application.
Arabian Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
17(5), P. 105756 - 105756
Published: March 26, 2024
KMnO4-modified
biochar
(KM/biochar)
derived
from
cotton
stem
is
prepared
with
different
stem/KMnO4
ratios
for
Pb(II)
removal
wastewater.
The
characterization
analysis
indicates
that
KM/biochar
has
abundant
surface
functional
groups
and
large
area,
contributing
to
removal.
adsorption
on
can
be
accurately
analyzed
using
the
Pseudo-second
order
Hill
model.
maximum
capacity
of
144.49
mg/g
at
pH
5.
spontaneous
based
thermodynamics
enthalpy
value
8.54
kJ/mol.
Coexisted
ions
such
as
Na+,
K+,
Ca2+
Mg2+
have
slightly
influenced
process.
regeneration
experiment
shows
excellent
after
three
cycles.
existence
CO2
contribute
mechanism
includes
precipitation,
cation
exchange,
electrostatic
attraction
π-π
interaction.
These
above
results
indicate
waste
converted
into
high-efficient
Water,
Journal Year:
2024,
Volume and Issue:
16(18), P. 2576 - 2576
Published: Sept. 11, 2024
This
study
evaluates
the
preparation
of
novel
ternary
functional
adsorbents
based
on
polyaniline,
zinc
oxide
nanoparticles,
and
moringa
oleifera
gum
to
produce
oxide/Moringa
gum-grafted
L-methionine-functionalized
polyaniline
bionanocomposites
(ZM-g-Pani)
employed
sequestrate
divalent
metal
ions
(Cd2+,
Hg2+
Pb2+)
from
wastewater
samples.
The
morphological
structural
properties
ZM-g-Pani
were
exploited
using
FT-IR,
FE-SEM/EDS,
TEM,
XRD.
FT-IR
FE-SEM
studies
show
that
as
prepared
nanocomposite
has
an
abundant
number
reactive
groups
a
porous
structure,
thus
demonstrating
outstanding
cation
removal.
confirms
attachment
L-methionine
is
facilitated
by
C-S
linkage.
Both
TEM
techniques
confirmed
clustered
granules
ZnO
over
surface
which
ultimately
provided
more
area
adsorb
ions.
demonstrated
Cd2+,
Pb2+
could
undergo
physical
sorption
chemisorption
simultaneously
during
adsorption
process.
maximum
capacity
was
840.33,
497.51,
497.51
mg/g
for
Hg2+,
Pb2+,
respectively.
impact
co-existing
ions,
including
NO3−,
PO43−,
SO42−,
Cl−,
Na+,
Cu2+,
Al3+,
showed
there
no
notable
alterations
in
selected
with
ZM-g-Pani.
eight
successive
regeneration
cycles
than
85%
removal
efficiency.
