Materials science forum,
Journal Year:
2024,
Volume and Issue:
1141, P. 119 - 126
Published: Dec. 20, 2024
The
filtration
of
hexavalent
chromium
(Cr(VI))
presents
a
significant
challenge
in
water
treatment
due
to
its
toxicity
and
environmental
impact.
This
study
is
oriented
towards
the
development
zeolite-based
membrane
for
removal
Cr(VI)
ions.
Flat
supports
are
made
from
clay
with
particle
size
between
160
250
µm
then
characterized
by
different
techniques
namely
FTIR,
XRD,
point
zero
charge
(pHpzc).
support
creates
porous
structure,
ideal
adsorbing
ions,
while
LTA-type
zeolite
offers
selective
permeability,
through
narrow
pore
size,
tuning
volume
down
on
Cr(VI).
Filtration
experiments
were
conducted
under
pressure
1.0
bar,
initial
concentration
10
-4
M
pH
=
5.4
evaluate
efficiency
performance
composite
membrane.
Results
demonstrate
reduction
concentration,
30%
50%
retention
LTA-zeolite
respectively.
proposed
methodology
has
potential
create
advanced
systems
that
can
effectively
remove
pollutants
aqueous
solutions,
thereby
challenging
important
issues.
Chemistry Africa,
Journal Year:
2024,
Volume and Issue:
7(8), P. 4513 - 4527
Published: Aug. 3, 2024
Abstract
Membrane-based
technologies
used
for
water
treatment
can
be
an
excellent
alternative
to
handle
wastewater
including
both
conventional
and
emerging
pollutants
as
they
provide
technological
(e.g.,
high
quality
of
treated
water)
economic
small
footprint
low
unit
cost
production)
advantages
over
other
processes.
Recently,
ceramic
membranes
fabricated
from
natural
resources
like
kaolinitic
clay,
bentonite
phosphate
are
increasingly
owing
their
low-cost
starting
materials,
sintering
temperature
additional
properties.
Moreover,
the
modification
surface
by
grafting
process
provides
appropriate
UF
(dp
<
10
nm)
suitable
micropollutants
removal
at
relatively
permeate
flux
value
which
maintained
during
filtration
due
antifouling
characteristics
active
layer.
In
this
work,
microfiltration
made
zeolite
was
chemically
modified
with
1
H,
2
H-perfluorodecyltriethoxysilane
molecule
named
PFAS.
Various
characterization
methods
techniques,
scanning
electron
microscopy
(SEM),
mercury
porosimetry,
FTIR,
TGA,
contact
angle,
were
check
properties
before
after
grafting.
The
grafted
pore
size
porosity
reduced,
proved
SEM
images.
determination
permeability
shows
a
reduction
1218
L.h
−1
.m
−2
.bar
204
confirm
densification.
application
membrane
Indigo
Blue
(IB)
colored
solution
oily
investigated
evaluate
performances
in
terms
retention.
results
revealed
good
retention
color
oil,
exceeding
95%
parameters.
Therefore,
it
is
interesting
recommend
new
industrial
containing
recalcitrant
such
color.
study
effect
on
plant
growth,
that
presence
some
residual
nutrients
required
crops
might
make
IB
beneficial
irrigation
purposes.
Water Science & Technology,
Journal Year:
2024,
Volume and Issue:
89(11), P. 2921 - 2935
Published: May 28, 2024
This
paper
centers
on
the
preparation
and
characterization
of
both
a
clay
support
faujasite
zeolite
membrane.
Additionally,
study
explores
development
bacterial
media
to
assess
performance
these
prepared
membranes.
The
membrane
was
created
using
hydrothermal
method,
involving
deposition
layer
fine-tune
pore
sizes
support.
supports
were
crafted
from
which
sieved
particle
size
Φ
≤
63
μm,
compacted
with
3.0
wt.%
activated
carbon,
then
sintered
at
1,000
°C.
Distilled
water
fluxes
revealed
decrease
1,500
L
m
Journal of the American Ceramic Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 11, 2024
Abstract
A
large
amount
of
wastewater
containing
Cr(VI)
is
highly
toxic
and
harmful
to
the
environment,
which
requires
effective
treatment.
In
this
study,
an
adsorbed
ceramsite
was
prepared
from
dredged
sludge
(DS)
reed
powder
(RP).
Then
introduced
Fe
3
O
4
magnetic
functional
groups
by
a
simple
hydrothermal
method
enhance
adsorption
wastewater.
Batch
experiments
‐modified
(FCS)
remove
were
studied
systematically.
Effects
different
contact
time,
adsorbent
mass
initial
concentration
on
removal
efficiency
investigated
optimized
response
surface
methodology.
The
results
show
that
when
loading
content
30%
(FCS‐0.3),
highest
reached
88.48%,
process
can
be
well
described
pseudo‐second‐order
kinetics
Langmuir
model,
indicating
chemisorption
monolayer
adsorption.
Moreover,
FTIR,
XPS
Zeta
potential
analysis
further
revealed
mechanism
efficient
loaded
onto
increase
specific
area
adsorb
Cr(VI).
This
study
provides
convert
solid
waste
such
as
DS
RP
into
Materials science forum,
Journal Year:
2024,
Volume and Issue:
1141, P. 119 - 126
Published: Dec. 20, 2024
The
filtration
of
hexavalent
chromium
(Cr(VI))
presents
a
significant
challenge
in
water
treatment
due
to
its
toxicity
and
environmental
impact.
This
study
is
oriented
towards
the
development
zeolite-based
membrane
for
removal
Cr(VI)
ions.
Flat
supports
are
made
from
clay
with
particle
size
between
160
250
µm
then
characterized
by
different
techniques
namely
FTIR,
XRD,
point
zero
charge
(pHpzc).
support
creates
porous
structure,
ideal
adsorbing
ions,
while
LTA-type
zeolite
offers
selective
permeability,
through
narrow
pore
size,
tuning
volume
down
on
Cr(VI).
Filtration
experiments
were
conducted
under
pressure
1.0
bar,
initial
concentration
10
-4
M
pH
=
5.4
evaluate
efficiency
performance
composite
membrane.
Results
demonstrate
reduction
concentration,
30%
50%
retention
LTA-zeolite
respectively.
proposed
methodology
has
potential
create
advanced
systems
that
can
effectively
remove
pollutants
aqueous
solutions,
thereby
challenging
important
issues.
