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
Royal Society Open Science,
Journal Year:
2024,
Volume and Issue:
11(5)
Published: May 1, 2024
Synthetic
organic
dyes,
which
are
resistant
to
biodegradation,
pose
a
notable
health
risk,
potentially
leading
cancer
and
respiratory
infections.
Researchers
have
addressed
this
concern
by
exploring
physicochemical
methods
remove
dyes
from
wastewater.
A
particularly
promising
solution
involves
modified
biochar
adsorbents,
demonstrate
high
efficiency
in
dye
removal.
Biochar,
charcoal-like
material
derived
biomass
pyrolysis,
offers
advantages
such
as
low
cost,
eco-friendliness,
reusability.
Beyond
its
role
sustainable
soil
remediation,
proves
effective
removing
wastewater
after
undergoing
physical
or
chemical
modification.
Acid–base
activation
metal–heteroatom
impregnation
enhances
biochar's
adsorption
capacity.
This
comprehensive
review
examines
the
attributes
of
biochar,
common
for
production
modification,
impacts
raw
materials,
pyrolysis
temperature,
heating
rate
residence
time.
It
further
elucidates
mechanism
removal
assessing
factors
influencing
efficiency,
including
feedstock,
pH,
particle
size,
initial
concentration,
dosage
reaction
explores
challenges,
opportunities,
reusability
regeneration
treating
also
discusses
recent
advances
using
adsorption-based
biochar.
The
ultimately
advocates
enhancing
performance
through
post-modification.
