Polysaccharides,
Journal Year:
2025,
Volume and Issue:
6(1), P. 1 - 1
Published: Jan. 1, 2025
Dyes
abundance
in
industrial
wastewater
exerts
adverse
effects
on
the
environment
and
human
health;
adsorption
represents
a
promising
remediation
strategy.
Chitosan-based
composites
are
interesting
materials
for
dye
adsorption.
In
this
work,
methyl
orange
(MO)
using
chitosan
(CH)
chitosan–graphene
oxide
(CH-GO)
aerogels
produced
by
supercritical
gel
drying,
performed
at
200
bar/35
°C,
was
assessed
studying
effect
of
driving
force
(25–100
ppm)
adsorbent
dosage
(1–8
g/L).
It
highlighted
that
difference
performance
between
two
adsorbents
non-negligible
only
high
concentrations:
processing
100
ppm
MO
solution,
qeq
is
59
mg/g
28
CH-GO
CH,
respectively.
Starting
from
10
8
g/L,
it
possible
to
achieve
efficiency
about
85%,
meaning
small
amounts
nanostructured
devices
can
result
good
process
outcomes.
Freundlich
isotherm
reliably
describes
system
behavior
(R2
=
0.99).
The
multi-linear
IPD
kinetic
model
confirms
case
porous
devices,
there
different
mass
transfer
phenomena
control
molecule
diffusion
through
system.
research
proposed
work
aims
explore,
as
first
assessment,
potential
purposes.
Journal of Molecular Liquids,
Journal Year:
2023,
Volume and Issue:
376, P. 121416 - 121416
Published: Feb. 8, 2023
The
study
of
adsorption
kinetics
is
ubiquitous
when
reporting
new
adsorbent
materials
in
the
literature.
information
these
tests
provide
are
no
doubt
valuable,
but
conclusions
drawn
from
kinetic
models
many
times
contradictory
between
papers.
In
this
work,
validity
and
meaning
common
reviewed
literature
dealing
with
their
mathematical
development,
discussed.
It
found
that
most
models,
pseudo
second
order
first
have
ability
to
fit
data
originating
systems
limited
by
surface
reaction
diffusion.
Thus,
not
associated
just
one
mechanism
further
precautions
analyzing
should
be
taken.
Other
less
also
discussed,
as
they
can
used
gain
clearer
insights
into
rate
limiting
step.
Another
important
topic
discussed
type
regression
used.
Linear
has
a
bias
toward
model
estimated
parameters
very
bad,
which
particularly
true
for
pseudo-first
model.
wrong
more
easily
chosen.
benefits
employing
nonlinear
criteria
selection
elaborated
upon,
using
case
studies
different
solutes
examples.
Chemical Reviews,
Journal Year:
2023,
Volume and Issue:
123(10), P. 6413 - 6544
Published: May 15, 2023
Interfacial
reactions
drive
all
elemental
cycling
on
Earth
and
play
pivotal
roles
in
human
activities
such
as
agriculture,
water
purification,
energy
production
storage,
environmental
contaminant
remediation,
nuclear
waste
repository
management.
The
onset
of
the
21st
century
marked
beginning
a
more
detailed
understanding
mineral
aqueous
interfaces
enabled
by
advances
techniques
that
use
tunable
high-flux
focused
ultrafast
laser
X-ray
sources
to
provide
near-atomic
measurement
resolution,
well
nanofabrication
approaches
enable
transmission
electron
microscopy
liquid
cell.
This
leap
into
atomic-
nanometer-scale
measurements
has
uncovered
scale-dependent
phenomena
whose
reaction
thermodynamics,
kinetics,
pathways
deviate
from
previous
observations
made
larger
systems.
A
second
key
advance
is
new
experimental
evidence
for
what
scientists
hypothesized
but
could
not
test
previously,
namely,
interfacial
chemical
are
frequently
driven
"anomalies"
or
"non-idealities"
defects,
nanoconfinement,
other
nontypical
structures.
Third,
progress
computational
chemistry
yielded
insights
allow
move
beyond
simple
schematics,
leading
molecular
model
these
complex
interfaces.
In
combination
with
surface-sensitive
measurements,
we
have
gained
knowledge
structure
dynamics,
including
underlying
solid
surface
immediately
adjacent
ions,
enabling
better
definition
constitutes
oxide-
silicate-water
critical
review
discusses
how
science
progresses
ideal
solid-water
realistic
systems,
focusing
accomplishments
last
20
years
identifying
challenges
future
opportunities
community
address.
We
anticipate
next
will
focus
predicting
dynamic
transient
reactive
structures
over
greater
spatial
temporal
ranges
systems
structural
complexity.
Closer
collaborations
theoretical
experts
across
disciplines
continue
be
achieving
this
great
aspiration.
RSC Advances,
Journal Year:
2023,
Volume and Issue:
13(8), P. 5027 - 5044
Published: Jan. 1, 2023
In
recent
years,
the
combination
of
experimental
and
theoretical
study
to
explain
adsorbate/adsorbent
interactions
has
attracted
attention
researchers.
this
context,
work
aims
adsorption
two
cationic
dyes,
namely
methylene
blue
(MB)
crystal
violet
(CV),
on
a
green
adsorbent
Montmorillonite@activated
carbon
(Mt@AC)
composite
behavior
each
dye
by
molecular
dynamics
(MD)
simulation
method.
The
eco-friendly
nanocomposite
Mt@AC
is
synthesized
characterized
analysis
methods:
XRD,
FTIR,
BET,
TGA/DTA,
SEM-EDS,
EDS-mapping
zeta
potential.
results
equilibrium
show
that
dyes
well
suited
Langmuir
model.
maximum
capacity
reaches
801.7
mg
g-1
for
1110.8
violet.
kinetics
data
fit
with
pseudo-first
order
kinetic
model
coefficient
determination
R2
close
unity,
non-linear
chi-square
χ2
zero
lower
Root
Mean
Square
Error
RMSE
(R2
→
1
0,
lower).
Molecular
dynamic
simulations
are
run
gain
insights
process.
According
RDF
interaction
energy
calculations,
obtained
reveal
better
affinity
CV
molecule
both
AC
sheet
montmorillonite
framework
as
compared
MB.
This
finding
suggests
adsorbed
larger
extent
onto
material
which
in
good
agreement
isothermal
experiment
observations.
