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
ChemistrySelect,
Journal Year:
2024,
Volume and Issue:
9(37)
Published: Sept. 27, 2024
Abstract
Valorizing
biodegradable
raw
materials
derived
from
agri‐waste
is
ecologically
beneficial.
Employing
such
to
produce
adsorbents
a
smart
platform
for
applications
in
wastewater
purification.
Lignin
one
of
the
most
plentiful
natural
biopolymers
world.
Its
macromolecular
structure
possesses
phenolic
and
carboxyl
groups
that
can
capture
heavy
metals
dyes.
be
chemically
physically
modified
generate
adsorbent
with
enhanced
capacity
remove
pollutants
wastewater.
In
this
work,
lignin
has
been
used
as
resource
synthesize
metal
oxide‐based
nanoadsorbents.
The
synthesized
lignin‐based
green
nanomaterials
effectively
removed
common
including
dyes,
metals,
bacteria.
water
purification
technique
holds
immense
potential
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
