Adsorption,
Journal Year:
2024,
Volume and Issue:
31(1)
Published: Dec. 4, 2024
Abstract
This
study
investigated
the
utilization
of
a
unique
oil
shale
as
sorbent
for
removal
2,4-dichlorophenol
(2,4-DCP)
from
aqueous
solutions.
The
influence
various
process
parameters,
including
contact
time,
sorbent/liquid
ratio,
pH,
and
temperature,
on
sorption
was
evaluated.
results
indicated
near-complete
2,4-DCP
within
24
h.
Favorable
observed
either
at
ratio
1:10,
elevated
temperatures
(40
°C),
or
lower
pH
values
(pH
=
5)
examined
range.
maximum
adsorption
capacity
40
°C
has
potential
to
reach
up
20.0
µmol/g.
Langmuir,
Freundlich,
Sips
isotherms
were
applied
experimental
data,
but
isotherm
provided
superior
fit,
suggesting
heterogeneous
sorption.
Kinetic
studies
revealed
two-stage
process:
intraparticle
diffusion
dominated
initial
stage,
whereas
other
rate-limiting
mechanisms
may
have
contributed
second
stage.
first-
second-order
kinetic
models
suggested
combined
mechanism.
According
thermodynaic
study,
spontaneous
exothermic,
by
negative
Gibbs
free
energy
change
enthalpy
change,
which
suggest
that
physisorption
predominated.
These
findings
demonstrate
an
unconventional
cost-effective
sorbent,
potentially
serving
substitute
activated
carbon
in
removal.
Graphical
abstract
Nanotechnology Reviews,
Journal Year:
2025,
Volume and Issue:
14(1)
Published: Jan. 1, 2025
Abstract
The
importance
of
environmental
monitoring
is
on
the
rise,
driven
by
increased
pressure
natural
environment
during
age
urbanization
and
industrialization.
To
address
this
demand,
it
necessary
to
have
fast
dependable
probes
for
real-time
with
precision
sensitivity.
Analytical
utilizing
sulfur
nanoparticles
offer
a
modern
alternative,
exhibiting
ability
identify
range
analytes.
discovery
zero-dimensional
quantum
dots,
such
as
dots
(SQDs),
unique
properties,
including
optical
characteristics,
high
hydrophilicity,
low
toxicity,
cost-effectiveness,
has
positioned
SQDs
advancing
luminescent
nanomaterials.
hold
great
potential
fluorescence
sensing,
making
them
promising
candidates
monitoring.
This
article
reviews
recent
studies
synthesis
using
various
methods
highlights
their
applications
sensing
materials
detecting
heavy
metal
ions
other
hazardous
molecules.
provides
valuable
insights
into
production
high-quality
tailored
applications,
offering
guidance
researchers
aiming
enhance
technologies
contamination
detection.
Adsorption,
Journal Year:
2024,
Volume and Issue:
31(1)
Published: Dec. 4, 2024
Abstract
This
study
investigated
the
utilization
of
a
unique
oil
shale
as
sorbent
for
removal
2,4-dichlorophenol
(2,4-DCP)
from
aqueous
solutions.
The
influence
various
process
parameters,
including
contact
time,
sorbent/liquid
ratio,
pH,
and
temperature,
on
sorption
was
evaluated.
results
indicated
near-complete
2,4-DCP
within
24
h.
Favorable
observed
either
at
ratio
1:10,
elevated
temperatures
(40
°C),
or
lower
pH
values
(pH
=
5)
examined
range.
maximum
adsorption
capacity
40
°C
has
potential
to
reach
up
20.0
µmol/g.
Langmuir,
Freundlich,
Sips
isotherms
were
applied
experimental
data,
but
isotherm
provided
superior
fit,
suggesting
heterogeneous
sorption.
Kinetic
studies
revealed
two-stage
process:
intraparticle
diffusion
dominated
initial
stage,
whereas
other
rate-limiting
mechanisms
may
have
contributed
second
stage.
first-
second-order
kinetic
models
suggested
combined
mechanism.
According
thermodynaic
study,
spontaneous
exothermic,
by
negative
Gibbs
free
energy
change
enthalpy
change,
which
suggest
that
physisorption
predominated.
These
findings
demonstrate
an
unconventional
cost-effective
sorbent,
potentially
serving
substitute
activated
carbon
in
removal.
Graphical
abstract
