Polymers,
Journal Year:
2023,
Volume and Issue:
15(19), P. 3923 - 3923
Published: Sept. 28, 2023
In
this
work,
a
new
lignocellulosic
adsorbent
was
obtained
and
tested
for
crystal
violet
dye
removal
from
water.
The
material
hart’s-tongue
fern
(Asplenium
scolopendrium)
leaves
after
minimal
processing,
without
chemical
or
thermal
treatment.
surface
of
the
characterized
using
variety
techniques,
including
FTIR,
SEM,
color
analysis.
effect
various
factors
on
adsorption
capacity
then
investigated
discussed.
kinetic
equilibrium
studies
showed
that
general-order
model
Sips
isotherm
are
most
suitable
to
describe
process.
time
reached
20
min
maximum
calculated
value
224.2
(mg
g−1).
determined
values
thermodynamic
parameters
indicated
physical
as
main
mechanism
involved
in
Taguchi
method
used
optimize
conditions
identify
influential
controllable
factor,
which
pH.
ANOVA
(general
linear
model)
calculate
percentage
contribution
each
factor
efficiency.
Analysis
all
results
shows
very
inexpensive,
readily
available,
effective
removing
aqueous
solutions.
Desalination and Water Treatment,
Journal Year:
2024,
Volume and Issue:
320, P. 100635 - 100635
Published: July 24, 2024
In
this
research
study,
we
examined
the
adsorption
behavior
of
methylene
blue
(MB)
on
a
novel
biosorbent
made
polyelectrolyte
multilayers
(PEM)
biopolymeric
material
at
three
different
temperatures.
Various
models
derived
from
statistical
physics
formalism
were
employed
to
analyze
isotherms.
An
alternative
approach
based
application
multilayer
theory
was
used
better
investigate
mechanisms
MB
PEM
grafting
material.
We
adjusted
various
parameters
within
model
across
temperatures
295K,
313
K,
and333K,
and
these
played
crucial
role
in
comprehending
mechanism.
addition,
revealed
that
dye
is
linked
through
process
with
'non-parallel'
configurations
multimolecular
process.
The
showed
maximum
capacities
ranging
632.23
mg⁄g
463.76
for
removal
over
pH
6.
calculated
energies
ranged
11.6
18.65kJ/mol,
indicating
primarily
physisorption
nature
influenced
by
both
hydrogen
bonding
van
der
Waals
interactions.
Thus,
theoretical
analysis
indicated
low-cost
adsorbent
(PEM
grafting)
promising
solution.
Additionally,
calculating
entropy,
free
energy
internal
which
govern
onto
Molecules,
Journal Year:
2025,
Volume and Issue:
30(7), P. 1488 - 1488
Published: March 27, 2025
Methylene
blue
dye,
commonly
used
in
various
industries,
poses
significant
risks
to
both
human
health
and
the
environment
due
its
persistence,
toxicity,
potential
disrupt
aquatic
ecosystems.
Exposure
can
cause
severe
conditions
such
as
methemoglobinemia,
while
stability
solubility
allow
it
persist
natural
water
systems,
reducing
oxygen
levels
harming
life.
In
this
study,
novel
analcime/sodium
magnesium
aluminum
silicon
silicate
nanocomposites
(Z1
Z2)
were
synthesized
via
a
controlled
hydrothermal
method,
where
Z1
Z2
absence
presence
of
polyethylene
glycol
template,
respectively.
X-ray
diffraction
(XRD)
analysis
confirmed
formation
crystalline
phases
analcime
sodium
silicate.
The
average
crystallite
size
nanocomposite
is
75.30
nm,
whereas
exhibits
smaller
60.27
nm
template
effect.
Field
emission
scanning
electron
microscopy
(FE-SEM)
revealed
that
exhibited
more
uniform
well-dispersed
particles
compared
Z1.
Energy-dispersive
spectroscopy
(EDX)
elemental
composition,
showing
higher
content
optimized
incorporation
Z2.
High-resolution
transmission
(HR-TEM)
demonstrated
had
well-defined
spherical
particles,
indicating
improved
structural
control.
maximum
adsorption
capacities
230.95
mg/g
for
290.69
process
was
exothermic,
spontaneous,
chemical
nature,
following
pseudo-second-order
kinetic
model
Langmuir
isotherm,
confirming
monolayer
on
homogeneous
surfaces.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(5), P. 585 - 585
Published: Feb. 21, 2024
Water
scarcity
and
contamination
have
emerged
as
critical
global
challenges,
requiring
the
development
of
effective
sustainable
solutions
for
treatment
contaminated
water.
Recently,
functionalized
polymer
biomaterials
garnered
significant
interest
because
their
potential
a
wide
range
water
applications.
Accordingly,
this
paper
highlights
design
new
adsorbent
material
based
on
cellulosic
nonwoven
textile
grafted
with
two
extracted
biopolymers.
The
layer-by-layer
grafting
technique
was
used
polyelectrolyte
multi-layer
(PEM)
biosorbent
production.
Firstly,
we
Suaeda
fruticosa
polysaccharide
(SFP)
confirmed
its
pectin-like
structure
via
SEC,
NMR
spectroscopy,
chemical
composition
analyses.
Afterward,
designed
an
alternating
multi-deposition
layers
SFP
carrageenan
crosslinked
1,2,3,4-butanetetracarboxylic
acid
(BTCA).
FT-IR
SEM
were
to
characterize
morphological
characteristics
material.
Chemical
polyesterification
reactions
PEM
through
analysis.
revealed
total
filling
microspaces
biopolymers
rougher
surface
morphology.
assessment
swelling
behavior
increase
in
hydrophilicity
produced
system,
required
property
efficient
sorption
potential.
evaluation
adsorption
capabilities
using
methylene
blue
(MB)
cationic
dye
conducted
various
experimental
settings,
changing
factors
such
pH,
time,
temperature,
initial
concentration
dye.
For
untreated
materials,
greatest
adsorbed
amounts
MB
130.6
mg/g
802.6
mg/g,
respectively
(pH
=
4,
T
22
C,
duration
120
min,
600
mg/L).
high
performance,
compared
other
reported
due
presence
large
number
hydroxyl,
sulfonate,
carboxylic
functional
groups
polymeric
system.
process
fitted
well
pseudo-first-order
kinetic
model
Langmuir/Temkin
isotherms.
This
newly
developed
multi-layered
shows
promise
excellent
resultant
cheap-cost/easy
preparation
alternative
treating
industrial
wastewater.
Molecules,
Journal Year:
2023,
Volume and Issue:
29(1), P. 54 - 54
Published: Dec. 21, 2023
Almond
shell-based
biocarbon
is
a
cheap
adsorbent
for
the
removal
of
malachite
green,
which
has
been
investigated
in
this
work.
FT-IR,
DRX,
and
BET
were
used
to
characterize
almond
biocarbon.
The
nitrogen
adsorption-desorption
isotherms
analysis
results
showed
surface
area
120.21
m2/g
type
H4
adsorption
isotherm.
parameters
initial
dye
concentration
(5–600
mg.L−1),
mass
(0.1–0.6
mg),
temperature
(298–373
K)
investigated.
experiments
that
shell
could
be
wide
range.
study
was
fitted
Langmuir
isotherm
pseudo-second-order
kinetic
model.
FT-IR
demonstrated
strong
agreement
with
chemisorption
process
description.
maximum
capacity
calculated
from
evaluated
166.66
mg.g−1.
positive
∆H
(12.19
J.mol−1)
indicates
endothermic.
found
stable
adsorbent.
Three
different
statistical
design
sets
taken
out
determine
best
conditions
batch
process.
optimal
MG
uptake
(m
=
0.1
g),
(C0
600
(T
25
°C).
using
D-optimal
model
obtained
important
significant,
an
R2
0.998.
Frontiers in Environmental Chemistry,
Journal Year:
2024,
Volume and Issue:
5
Published: Oct. 23, 2024
Hexavalent
chromium
(Cr(VI))
contamination
in
drinking
water
due
to
industrial
activities
is
a
growing
worldwide
concern.
Cr(VI)
concentrations
exceeding
few
parts
per
billion
(ppb)
can
cause
serious
health
problems
such
as
asthma,
blood
cancer,
kidney-related
diseases,
liver
and
spleen
damage,
well
neurological
system,
immunological
deficiencies,
reproductive
issues.
This
study,
thus,
explored
the
feasibility
of
employing
novel
polymeric
ferromagnetic
nanocomposite
adsorbent
made
low-cost,
biodegradable,
ultra-permeable
materials
from
pulp
paper
sludge
for
adsorptive
removal
hexavalent
(Cr
6+
)
synthetic
wastewater.
Vibrating-sample
magnetometer
(VSM),
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM),
Brunauer-Emmet-Teller
surface
area
(BET),
Fourier
transform
infrared
(FTIR)
were
used
analyze
produced
adsorbent.
The
results
confirmed
presence
peaks
attributed
−OH,
−NH2,
FeO.
Scanning
micrographs
revealed
porous
surface.
XRD
existence
crystalline
spinel-structured
magnetite
(Fe
3
O
4
phase
iron
oxide,
while
saturation
magnetization
was
established
be
26.90
emu/g.
Brunauer–Emmett–Teller
analysis
slight
decrease
6.693
m
2
.g
−1
,
compared
Fe
(7.591
).
optimum
conditions
Cr
pH
2.0,
1.0
g/L
dose,
room
temperature
(25°C),
120
min
contact
time,
20
mg/L
pollutant
concentration.
During
removal,
adsorbed
by
electrostatic
attraction
and/or
reduced
trivalent
Cr(III).
At
low
starting
concentrations,
chemisorption
dominated
process,
but
increased,
physisorption
became
more
significant.
prepared
presented
exceptional
efficiency
up
92.23%,
indicating
that
it
may
useful
adsorption
metal
ions
household
