Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Дек. 30, 2024
This
paper
presented
the
preparation,
characterization,
and
adsorption
properties
of
Brazil
nut
shell
activated
carbon
for
catechol
removal
from
aqueous
solutions.
The
equilibrium
molecules
on
this
was
experimentally
quantified
at
pH
6
temperatures
ranging
25
to
55
°C,
°C
10.
These
results
were
utilized
elucidate
role
surface
functionalities
through
statistical
physics
calculations.
All
these
experimental
isotherms
fitted
interpreted
via
a
monolayer
model
with
one
energy,
which
chosen
as
optimal
model.
Model
physicochemical
parameters,
may
be
categorized
stereographic
parameters
such
maximum
adsorbed
quantity
(Q
In
this
study,
fig
branch
biochar
(FBB)
was
modified
by
chitosan
to
improve
the
Cd2+
adsorption
performance
from
an
aqueous
solution.
The
surface
area,
pores,
and
functional
groups
of
chitosan-modified
(CMFBB)
were
characterized
DTG-TGA,
BET,
SEM-EDS,
FTIR,
XRD.
addition,
impact
various
conditions
on
Cd
analyzed,
including
dosage,
initial
pH,
concentration,
temperature,
reaction
time,
coexisting
cations.
kinetics,
isotherms,
practical
applications
also
investigated.
Under
optimized
pH
6,
adsorbent
dose
2
g
L-1,
time
90
min,
concentration
100
mg
25
°C,
capacity
62.25
g-1,
representing
a
78.26%
increase
compared
FBB.
data
for
CMFBB
found
be
well-described
pseudo-second-order
kinetic
Langmuir
isothermal
models,
indicating
that
monolayer
chemical
process
occurred.
spontaneous
endothermic
process,
cations
exerted
negligible
influence
process.
After
five
adsorption-desorption
cycles,
maintained
efficiency
92.3%,
demonstrating
excellent
regeneration
capability.
quantification
mechanisms
suggested
physical
adsorption,
cation
exchange,
precipitation,
complexation,
π-π
interactions
accounted
3.70,
2.50,
33.04,
58.76,
2.0%
total
adsorbed
in
CMFBB,
respectively.
Compared
with
FBB,
level
increased
26.52%
complexation.
This
work
implies
has
great
potential
as
effective
absorbent
treating
polluted
water.
Environmental Technology,
Год журнала:
2025,
Номер
unknown, С. 1 - 31
Опубликована: Фев. 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.
