Polymer Testing,
Год журнала:
2024,
Номер
130, С. 108321 - 108321
Опубликована: Янв. 1, 2024
This
study
addresses
the
critical
issue
of
removing
copper(II)
ions
from
water
using
an
eco-friendly
approach
with
natural
biomaterials.
Alginate,
a
polysaccharide,
is
employed
as
primary
adsorption
material.
The
involves
conversion
alginate
into
nanoparticles,
and
ternary
blend
prepared
by
mixing
nanoparticles
carboxymethyl
cellulose
polyethylene
glycol
(AL-NPs/CMC/PEG).
blend's
morphological
structural
transformations
have
been
comprehensively
investigated
techniques
such
DLS,
FT-IR,
XRD,
TGA,
SEM.
Batch
experiments
were
conducted
systematically
to
investigate
crucial
parameters,
contact
time
(60–300
min),
initial
copper
concentration
(62.5
ppm–1000
ppm),
solution
pH
(2–8),
adsorbent
dosage
(1–5
g).
results
obtained
are
highly
encouraging,
revealing
impressive
80.9
%
efficiency
in
removal
ions.
acquired
experimental
data
then
subjected
analysis
Langmuir
Freundlich,
isotherm,
well
pseudo-first
pseudo-second-order
kinetics
studies.
outcomes
these
isotherm
models
indicated
favorable
fit
Freundlich
suggesting
strong
affinity
between
metal
Furthermore,
kinetic
studies
revealed
that
process
closely
adheres
kinetics,
underlining
reliability
process.
From
desorption
studies,
0.1
M
HCl
was
extremely
effective
eluant
when
compared
HNO3
EDTA.
It
could
be
reused
three
appreciate
efficiency.
research
underscores
potential
for
environmentally
sustainable
address
persistent
environmental
challenge
posed
ion
contamination.
Polymers,
Год журнала:
2023,
Номер
15(14), С. 3114 - 3114
Опубликована: Июль 21, 2023
Over
the
past
three
decades,
chemical
and
biological
water
contamination
has
become
a
major
concern,
particularly
in
industrialized
world.
Heavy
metals,
aromatic
compounds,
dyes
are
among
harmful
substances
that
contribute
to
pollution,
which
jeopardies
human
health.
For
this
reason,
it
is
of
utmost
importance
locate
methods
for
cleanup
wastewater
not
genuinely
effective.
Owing
its
non-toxicity,
biodegradability,
biocompatibility,
starch
naturally
occurring
polysaccharide
scientists
looking
into
as
possible
environmentally
friendly
material
sustainable
remediation.
Starch
could
exhibit
significant
adsorption
capabilities
towards
pollutants
with
substitution
amide,
amino,
carboxyl,
other
functional
groups
hydroxyl
groups.
derivatives
may
effectively
remove
contaminants
such
oil,
organic
solvents,
pesticides,
heavy
dyes,
pharmaceutical
by
employing
techniques
at
rate
greater
than
90%.
The
maximal
capacities
starch-based
adsorbents
oil
metal
ions,
pharmaceuticals
13,000,
66,
2000,
25,000,
782
mg/g,
respectively.
Although
have
demonstrated
promising
future
environmental
treatment,
additional
research
required
optimize
technique
before
adsorbent
can
be
used
large-scale
situ
treatment.
Separations,
Год журнала:
2023,
Номер
10(11), С. 565 - 565
Опубликована: Ноя. 10, 2023
The
long-term
sustainability
of
the
global
water
supply,
with
a
paramount
emphasis
on
cleanliness
and
safety,
stands
as
formidable
challenge
in
our
modern
era.
In
response
to
this
pressing
issue,
adsorption
techniques
have
emerged
pivotal
widely
recognized
solutions
for
removal
hazardous
pollutants,
particular
lead
from
wastewater.
This
comprehensive
review
explores
relentless
advancements
made
domain,
highlighting
innovations
using
separation
purification
that
surpass
traditional
metal
oxide-based
adsorbents.
Of
note
is
growing
exploration
alternative
materials,
such
starch,
chitosan,
nanoscale
structures
like
zeolites
metal-organic
frameworks,
magnetic
carbon-based
substances
development
inorganic
These
their
remarkable
capacity
structural
adjustment,
possess
extraordinary
capabilities
effective
contaminant
removal,
facilitating
swift
purification.
literature
survey
was
conducted
Google
Scholar
engine,
“adsorbents
remediation”
starting
keywords,
resulting
approximately
6000
papers.
search
refined
focus
last
three
years
specifically
targeted
papers
which
are
most
relevant
remediation.
More
than
100
were
analysed
investigate
various
techniques,
surface
modifications,
adsorbent
materials
managing
pollutants
water.
also
illuminates
research
limitations,
specific
starch-based
adsorbents
As
we
progress
towards
practical
commercial
applications,
identifies
challenges
associated
provides
invaluable
insights
into
future
prospects.
Surface
modification
emerges
promising
path,
potential
substantially
enhance
capacity,
potentially
doubling
or
even
quadrupling
it.
Moreover,
demonstrate
impressive
regenerative
capabilities,
maintaining
up
90%
regeneration
efficiency
after
multiple
cycles.
conclusion,
show
considerable
agents
aquatic
environments.
Nevertheless,
need
further
persists,
emphasizing
optimization
process
exploring
stability
real-world
scenarios.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Март 5, 2024
Abstract
Activated
carbon
(AC)
and
ZnO@AC
composite
derived
from
wood
sawdust
were
prepared
to
be
utilized
as
adsorbents
for
methyl
red
(MR)
orange
(MO)
anionic
dyes
the
aqueous
solutions.
The
maximum
adsorption
capacity
of
AC
toward
both
was
achieved
in
strong
acidic
medium
(pH
=
3),
under
stirring
60
min.
kinetic
studies
revealed
that
MR
MO
onto
fitted
well
with
pseudo-second-order
model.
Furthermore,
intraparticle
diffusion
Elovich
models
confirmed
is
controlled
by
external
surfaces,
chemisorption
process.
isotherm
results
indicated
dye
occurred
via
monolayer
adsorption,
estimated
capacities
higher
than
those
AC.
Thermodynamic
analysis
suggested
endothermic
spontaneous.
mechanism
MR,
proposed
electrostatic
bonding,
π–π
interactions,
ion
exchange,
while
H-bonding
n–π
interactions
minor
contributors.
This
study
reveals
potential
use
carbon-based
removal
wastewater.
