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
Nanoscale Advances,
Journal Year:
2024,
Volume and Issue:
7(1), P. 13 - 41
Published: Nov. 21, 2024
This
review
article
discusses
and
summarizes
the
synthesis
applications
of
luminescent
metal–organic
frameworks
(MOFs)
for
sensing
dipicolinic
acid
in
biological
water
samples.
Environmental Technology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 31
Published: Feb. 22, 2025
Antibiotic
contamination
in
aquatic
environments
is
a
growing
concern,
posing
risks
to
public
health
and
ecosystems.
To
address
this
issue,
advanced
materials
like
graphene
oxide
(GO)
chitosan-based
hydrogels
are
being
extensively
explored
for
their
ability
effectively
remove
antibiotics
from
wastewater,
owing
distinct
characteristics
synergistic
benefits.
This
review
comprehensively
examines
the
synthesis,
characterization,
applications
of
GO/chitosan
addressing
antibiotic
pollution.
The
synthesis
methods,
including
solution
casting,
crosslinking,
situ
polymerization,
discussed
simplicity
scalability.
hydrogels'
key
properties,
such
as
porosity,
surface
area,
mechanical
strength,
essential
efficient
adsorption
capabilities.
Adsorption
mechanisms,
electrostatic
interactions,
π-π
stacking,
hydrogen
bonding,
functional
groups,
enable
these
achieve
high
capacities.
Notable
examples
include
rGO@ZIF-67@CS
hydrogels,
which
achieved
higher
capacities
1685.26
mg·g−1
tetracycline
at
pH
4
1890.32
norfloxacin
5,
while
sulfonated
CMC/GO-GCC
composite
hydrogel
312.28
sulfamethoxazole
298
K.
Moreover,
efficiencies
90.42%
with
GO–CTS
97.06%
were
using
AGO–CTS
diclofenac
adsorption.
also
highlights
practical
wastewater
treatment,
comparing
performance
other
adsorbents
challenges
scalability
regeneration.
Finally,
explores
future
research
directions
enhance
effectiveness
sustainability
emphasizing
potential
scalable,
eco-friendly
solutions
removal
water.
ACS Omega,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 14, 2025
Heavy
metal
pollutants,
such
as
Cu2+,
pose
significant
environmental
and
health
risks
due
to
their
toxicity
persistence
in
water
systems.
Simultaneously,
the
increasing
accumulation
of
waste
poly(ethylene
terephthalate)
(PET)
bottles
represents
a
growing
challenge,
contributing
plastic
pollution.
This
study
addresses
both
issues
by
converting
PET
into
porous
activated
carbon
(APC)
via
pyrolysis,
creating
an
efficient
sustainable
adsorbent
for
Cu2+
removal
from
aqueous
solutions.
The
APC
materials
were
thoroughly
characterized
SEM,
BET,
XPS
analyses,
revealing
highly
structure
abundant
oxygen-containing
functional
groups,
which
enhance
adsorption.
adsorption
process
was
determined
be
spontaneous,
with
low
activation
energy
7.47
kJ/mol,
indicating
favorable
energy-efficient
mechanism.
Among
samples,
APC-800
exhibited
best
performance,
achieving
efficiency
99.30%
maximum
capacity
5.85
mg/g.
Recyclability
tests
confirmed
material's
durability,
maintaining
over
96%
during
first
three
cycles,
slight
decline
later
cycles.
demonstrates
dual
benefit:
mitigating
repurposing
providing
effective
solution
heavy
pollution,
aligning
circular
economy
principles,
promoting
sustainability
management.
