Polymers,
Год журнала:
2024,
Номер
16(24), С. 3469 - 3469
Опубликована: Дек. 12, 2024
Designing
new
engineered
materials
derived
from
waste
is
essential
for
effective
environmental
remediation
and
reducing
anthropogenic
pollution
in
our
economy.
This
study
introduces
an
innovative
method
remediating
metal-contaminated
water,
using
two
distinct
types:
one
biowaste
(eggshell)
industrial
(fly
ash).
We
synthesized
three
novel,
cost-effective
nanoadsorbent
types,
including
tertiary
composites
biopolymer-based
(specifically
k-carrageenan
chitosan),
which
targeted
chromium
removal
aqueous
solutions.
SEM
analysis
reveals
that
the
first
composite,
EMZ,
zeolite,
magnetite
nanoparticles
are
successfully
integrated
into
porous
structure
of
eggshell.
In
second
composite
(FMZ),
fly
ash
particles
similarly
loaded
within
zeolite
pores.
Each
by
incorporating
corresponding
(FMZ
or
EMZ)
biopolymer
framework.
Structural
modifications
eggshell,
chitosan,
resulted
notable
increases
specific
surface
area,
as
confirmed
BET
analysis.
These
enhancements
significantly
improve
adsorption
efficiency
each
adsorbent
type
developed.
The
performances
achieved
follows:
EMZ
(89.76%),
FMZ
(84.83%),
EMZCa
(96.64%),
FMZCa
(94.87%),
EMZC
(99.64%),
FMZC
(97.67%).
findings
indicate
across
all
types
occurs
via
a
multimolecular
layer
mechanism,
characterized
spontaneous
endothermic.
Desorption
studies
further
demonstrate
high
reusability
these
nanomaterials.
Overall,
this
research
underscores
potential
utilizing
performant
low-cost
biocomposites
bioremediation
applications.
Water,
Год журнала:
2024,
Номер
16(14), С. 2050 - 2050
Опубликована: Июль 19, 2024
Microplastics
are
omnipresent
in
aquatic
environments
and
can
act
as
vectors
to
carry
other
pollutants,
modifying
their
pathway
through
the
systems.
In
this
study,
differences
adsorption
capacity
mechanism
for
Cr(VI)
sorption
with
polyethylene
(PE,
a
conventional
microplastic)
polylactic
acid
(PLA,
biodegradable
were
investigated
via
characterization
of
MPs,
determination
kinetic
behavior
(pseudo-first-
second-order
model,
Elovich
model),
degree
fit
Langmuir
Freundlich
isothermal
models;
was
also
studied
under
different
solution
conditions.
The
results
indicated
that
when
dose
MPs
1
g/L,
on
reached
highest
value,
capacities
PLA(0.415
mg/g)
>
PE(0.345
mg/g).
PE
followed
isotherm
while
PLA
had
stronger
model.
Sorption
both
cases
pseudo-first-order
kinetics
maximum
(0.54
is
higher
than
(0.38
addition,
could
reach
equilibrium
about
8
h
adsorb
72.3%
total
within
4
h,
required
16
equilibrium,
suggesting
adsorbs
at
significantly
faster
rate
PE.
Thus,
like
may
serve
superior
carrier
environments.
When
pH
increased
from
2
6,
by
decreased
0.49
mg/g
0.52
0.27
0.26
mg/g,
respectively.
concentration
sodium
dodecyl
sulfate
nil
300
mg/L,
3.66
3.05
times,
temperature
presence
Cu2+
photoaging
promoted
salinity
inhibited
adsorption.
desorption
efficiencies
PLA(57.8%)
PE(46.4%).
further
confirmed
be
attributed
electrostatic
attraction,
hydrogen
bonding,
surface
complexation.
sum,
potentially
better
PE,
but
risk
associated
might
Polymers,
Год журнала:
2024,
Номер
16(24), С. 3469 - 3469
Опубликована: Дек. 12, 2024
Designing
new
engineered
materials
derived
from
waste
is
essential
for
effective
environmental
remediation
and
reducing
anthropogenic
pollution
in
our
economy.
This
study
introduces
an
innovative
method
remediating
metal-contaminated
water,
using
two
distinct
types:
one
biowaste
(eggshell)
industrial
(fly
ash).
We
synthesized
three
novel,
cost-effective
nanoadsorbent
types,
including
tertiary
composites
biopolymer-based
(specifically
k-carrageenan
chitosan),
which
targeted
chromium
removal
aqueous
solutions.
SEM
analysis
reveals
that
the
first
composite,
EMZ,
zeolite,
magnetite
nanoparticles
are
successfully
integrated
into
porous
structure
of
eggshell.
In
second
composite
(FMZ),
fly
ash
particles
similarly
loaded
within
zeolite
pores.
Each
by
incorporating
corresponding
(FMZ
or
EMZ)
biopolymer
framework.
Structural
modifications
eggshell,
chitosan,
resulted
notable
increases
specific
surface
area,
as
confirmed
BET
analysis.
These
enhancements
significantly
improve
adsorption
efficiency
each
adsorbent
type
developed.
The
performances
achieved
follows:
EMZ
(89.76%),
FMZ
(84.83%),
EMZCa
(96.64%),
FMZCa
(94.87%),
EMZC
(99.64%),
FMZC
(97.67%).
findings
indicate
across
all
types
occurs
via
a
multimolecular
layer
mechanism,
characterized
spontaneous
endothermic.
Desorption
studies
further
demonstrate
high
reusability
these
nanomaterials.
Overall,
this
research
underscores
potential
utilizing
performant
low-cost
biocomposites
bioremediation
applications.
