Technical Education Science/Giáo dục Kỹ thuật,
Год журнала:
2024,
Номер
19(Special Issue 05), С. 92 - 100
Опубликована: Дек. 28, 2024
An
effective
adsorbent
was
synthesized
by
modifying
Montmorillonite
(MMT)
clay
with
oxidized
starch,
aiming
to
remove
crystal
violet
(CV)
dye
from
aqueous
solutions.
The
chemical
modifications
in
the
MMT-oxidized
starch
composite
were
characterized
using
Fourier-transform
infrared
spectroscopy
(FTIR),
confirming
successful
integration
of
MMT.
adsorption
performance
evaluated
under
varying
conditions,
including
initial
concentration,
dosage,
pH,
and
contact
time.
Kinetic
analysis
revealed
that
process
followed
a
pseudo-second-order
model,
while
equilibrium
data
fitted
Langmuir
isotherm,
indicating
monolayer
adsorption.
demonstrated
high
capacity
25.4
mg/g
at
pH
7
for
CV
dye.
Thermogravimetric
(TGA)
confirmed
thermal
stability
material
these
findings
suggest
starch-MMT
is
promising
alternative
efficient
removal
cationic
dyes
like
wastewater,
significant
implications
scalable
water
treatment
applications
broader
environmental
remediation
efforts
both
industrial
municipal
settings.
This
research
examines
the
adsorption
behavior
of
naphthalene
and
benzene
onto
thermally
modified
clay
using
equilibrium
kinetic
modeling
techniques.
Kinetic
approaches
encompassing
Pseudo-First
Order,
Pseudo-Second
Elovich,
Intra-Particle
Diffusion,
Power
Function
models
were
applied
to
both
unmodified
clay.
Among
these,
Elovich
model
exhibited
highest
correlation
coefficient
(R²),
indicating
its
superior
ability
describe
process.
For
adsorption,
yielded
an
R²
value
0.9844
for
0.9666
clay,
while
provided
0.9770
0.9547
The
characteristics
pollutants
evaluated,
revealing
that
achieved
in
26
hours,
with
concentration
reductions
from
5.2
mg/L
on
untreated
2
Naphthalene
reached
within
22
experiencing
significant
drops.
findings
underscore
enhanced
efficiency
calcined
compared
counterpart,
positioning
it
as
a
viable
material
wastewater
treatment,
pollution
mitigation,
separation
organic
contaminants.
Revista de Gestão Social e Ambiental,
Год журнала:
2024,
Номер
18(10), С. e09002 - e09002
Опубликована: Окт. 16, 2024
Objective:
The
objective
of
this
study
was
to
evaluate
the
removal
Pb
and
As
in
aqueous
media
by
activated
clay
(AC).
Theoretical
Framework:
Heavy
metals
water
represent
a
risk
health
ecosystems,
their
through
new
materials
is
challenge
for
industry.
Method:
methodology
adopted
research
comprises
that
natural
(NC)
with
sodium
chloride
phosphoric
acid
followed
sonication.
A
synthetic
solution
prepared
at
different
pH.
Results
Discussion:
zero
charge
point
found
be
7.10
AC
8.02
NC,
ζ
potential
between
-
41.15
45.43
mV
pH
range
4
12,
degree
crystallinity
97.24%
crystal
size
2.85
nm
determined
XRD.
FTIR
analysis
allowed
identification
functional
groups
chelating
capacity.
Was
observed
75.51%
(110.40
mg/g)
23.23%
(58.13
97.75%
(106.41
100.0%
(206.53
NC
respectively
6
8.
Research
Implications:
Los
reaultadoe
encontrados
sugieren
que
la
arcilla
activada
se
convierte
en
un
material
alta
capacidad
de
adsorción
metales
pesados
sistemas
multimetal.
Esta
cualidad
debe
al
incremtno
grupos
funionales
su
superficie
y
tamaño
nanométrico
incrementa
el
área
contacto.
Originality/Value:
Activation
weak
sonication
an
environmentally
friendly
process
produces
high
heavy
metal
capacity
media.
IntechOpen eBooks,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 11, 2024
Beneath
the
Earth’s
surface
lies
a
hidden
realm
of
immense
environmental
and
ecological
significance—groundwater.
This
vital
resource
is
faced
with
increasing
threats
from
myriad
contaminants,
both
natural
anthropogenic.
Clay
minerals,
often
overlooked
components
geological
formations,
serve
as
nature’s
heroes
in
protecting
remediating
groundwater.
chapter
highlights
remarkable
role
clay
particularly
montmorillonite,
safeguarding
Their
unique
physico-chemical
properties
enable
them
to
function
filters,
adsorbents,
barriers
against
pollutants,
exceptional
efficiency
ammonium
removal
through
interlayer
sites
cation
exchange
mechanisms.
The
details
how
minerals
manage
harmful
substances,
preventing
their
spread
into
aquifers,
examines
engineered
solutions
groundwater
remediation,
emphasizing
advancements
nanotechnology
material
science.
also
addresses
challenges
limitations
different
contexts
contamination
scenarios,
providing
balanced
perspective
on
protection.
By
shedding
light
these
‘unsung
heroes’,
we
aim
foster
deeper
appreciation
for
intricate
systems
that
help
maintain
quality
inspire
innovative
approaches
water
management
remediation.
ChemEngineering,
Год журнала:
2024,
Номер
8(6), С. 130 - 130
Опубликована: Дек. 18, 2024
A
novel
material
was
created
from
natural
ilmenite
sand,
and
methylene
blue
(MB)
used
to
test
the
material’s
capacity
remove
colors
wastewater.
The
synthesized
by
neutralizing
acid
leachate
obtained
Ilmenite
sand
digestion,
followed
drying
at
180
°C.
It
characterized
XRD,
Raman,
TEM,
SEM,
XPS,
XRF,
BET
techniques.
crystal
nature
of
composite
is
Fe3O4/Fe2TiO5/TiO2.
surface
area,
average
pore
size
total
volume
are
292.18
m2/g,
1.53
nm,
0.202
cc/g,
respectively.
At
pH
10,
10
mg/L
MB,
mg
resulted
in
a
maximum
adsorption
24.573
mg/g.
Using
5
increments,
dye
concentration
adjusted
between
25
mg/L,
yielding
equilibrium
capacities
24.573,
31.012,
41.443,
52.259
mg/g
with
15,
20,
greatest
adsorbent
achieved
MB.
dosage
ranged
25,
45,
65,
100
mg.
MB
adsorbed
via
pseudo-second-order
kinetics
an
24.863
intraparticle
diffusion
model
showed
that
occurs
three
stages,
intra-particle
constants
1.50,
2.71,
3.38,
4.41
g/mg
min1/2.
Adsorption
Langmuir
isotherm
model.
thermodynamic
parameters
ΔG,
ΔH,
ΔS
were
−27.5521
kJ/mol
298
K,
2.571
kJ/mol,
0.101
Regeneration
studies
carried
out
for
five
cycles,
indicating
some
activity
loss
after
each
cycle.
