International Journal of Molecular Sciences,
Год журнала:
2023,
Номер
24(3), С. 2948 - 2948
Опубликована: Фев. 2, 2023
Water
pollution
from
dyes
is
harmful
to
the
environment,
plants,
animals,
and
humans
one
of
most
widespread
problems
afflicting
people
throughout
world.
Adsorption
a
widely
used
method
remove
contaminants
derived
textile
industry,
food
colorants,
printing,
cosmetic
manufacturing
water.
Here,
aiming
develop
new
low-cost
up-scalable
adsorbent
materials
for
anionic
dye
remediation
water
decontamination
by
electrostatic
interactions,
two
cationic
resins
(R1
R2)
were
prepared.
In
particular,
they
obtained
copolymerizing
4-ammonium
methyl
ethyl
styrene
monomers
(M1
M2)
with
dimethylacrylamide
(DMAA),
using
N-(2-acryloylamino-ethyl)-acrylamide
(AAEA)
as
cross-linker.
Once
characterized
several
analytical
techniques,
upon
their
dispersion
in
an
excess
water,
R1
R2
provided
R1-
R2-based
hydrogels
(namely
R1HG
R2HG)
equilibrium
degrees
swelling
(EDS)
900%
1000%
contents
(EWC)
90
91%,
respectively.
By
applying
Cross'
rheology
equation
data
R2HG's
viscosity
vs.
shear
rate,
it
was
established
that
both
are
thinning
fluids
pseudoplastic/Bingham
plastic
behavior
depending
on
share
rate.
The
equivalents
-NH3+
groups,
essential
electrostatic-based
absorbent
activity,
estimated
Gaur
Gupta
potentiometric
titrations
R2HG.
absorption
experiments
bulk,
R2HG
showed
high
removal
efficiency
(97-100%)
towards
orange
(MO)
azo
dye,
fluorescein
(F),
mixture
(MOF).
Using
F
or
MO
solutions
(pH
=
7.5,
room
temperature),
maximum
47.8
mg/g
90'
(F)
47.7
120'
R1,
while
49.0
20'
48.5
30'
(MO).
Additionally,
R2HG-based
columns,
mimicking
systems
filtration,
capable
removing
MO,
F,
MOF
100%
efficiency,
different
conditions
use.
represent
column
packing
promising
application
industrial
wastewater
treatment.
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.
Surfaces and Interfaces,
Год журнала:
2024,
Номер
51, С. 104670 - 104670
Опубликована: Июнь 26, 2024
Polluted
water
containing
synthetic
dyes
from
industries
of
various
sectors
is
a
serious
hazard
to
human
health
as
well
the
rest
flora
and
fauna
in
environment.
It
has
be
treated
by
efficient
yet
cost-effective
methods
such
adsorption
pollutant
dyes.
This
review
summarizes
successful
one
hazardous
dye,
methylene
blue,
using
polymeric
hydrogel
nanocomposites
adsorbents.
These
have
been
proven
more
active
adsorbing
than
mere
parent
polymers
or
pure
nanoparticles,
seen
most
cases.
effect
may
contribution
high
capacities
result
proposed
mechanisms,
synergistic
enhancement
desired
characters
its
components,
significance
optimum
sorption
conditions
influencing
dye
onto
nanocomposite
adsorbent.
The
porous
nature
polymer
activity
nanofillers
are
potential
cause
for
this
research.
Not
only
novel
adsorbents
remediation
pollution
but
also
green
approach
due
spontaneity
process
without
consumption
external
energy
addition
being
recyclable
non-toxic.
