Separations,
Год журнала:
2023,
Номер
10(2), С. 88 - 88
Опубликована: Янв. 28, 2023
Cd(II)
and
Cu(II)
ions
cause
many
diseases
in
humans.
Therefore,
they
should
be
removed
from
water
sources
using
simple
cost-effective
adsorbents.
Consequently,
sodium
magnesium
silicate
hydroxide/sodium
hydrate
nanostructures
were
synthesized
functionalized
2,3-dihydroxybenzaldehyde
as
a
novel
nanocomposite.
Several
instruments
used
to
characterize
the
synthetic
products,
such
an
X-ray
diffractometer
(XRD),
Fourier-transform
infrared
spectrophotometer
(FT-IR),
N2
adsorption/desorption
analyzer,
CHN
elemental
energy-dispersive
(EDS),
field
emission
scanning
electron
microscope
(FE-SEM).
The
functionalization
of
with
led
disappearance
XRD
peaks
presence
broad
peak
at
2θ
=
32°.
In
addition,
FE-SEM
images
revealed
that
consisted
spheres,
cubes,
irregular
shapes
average
grain
size
115
nm,
nanocomposite
spherical
conglomerates
consisting
needle-like
shapes.
anticipated
morphology
following
resulted
on
backbones
nanostructures.
EDS
results
showed
composed
O,
Na,
Mg,
Si
weight
percentages
equal
38.59%,
5.95%,
16.60%,
38.86%,
respectively.
Additionally,
was
C,
N,
55.31%,
2.23%,
30.09%,
6.56%,
2.98%,
12.83%,
samples
utilized
for
efficient
removal
cadmium
copper
aqueous
media
ion
exchange
chelation
adsorption
procedures,
Optimum
conditions
removing
achieved
pH,
time,
temperature
7.5,
80
min,
298
K,
maximum
uptake
capacities
toward
89.44
mg/g
155.04
mg/g,
respectively,
103.73
177.94
Moreover,
processes
exothermic,
chemical,
followed
pseudo-second-order
model
Langmuir
equilibrium
isotherm
model.
Journal of Membrane Science,
Год журнала:
2023,
Номер
691, С. 122224 - 122224
Опубликована: Ноя. 7, 2023
Nowadays,
brine
produced
in
the
Reverse
Osmosis
(RO)
seawater
desalination
plants
is
a
significant
and
largely
untapped
source
of
critical
minerals
metals,
which
usually
discharged
into
seas
as
wastewater.
As
front
face
stage
mining
process,
nanofiltration
(NF)
membranes
can
be
used
to
separate
stream
monovalent
multivalent
ion-rich
streams.
Since
high
separation
factors
are
required
RO
brine,
polyelectrolyte
multilayers
with
Layer-by-Layer
(LbL)
technique
were
this
study
modify
commercial
polyamide
NF
improve
their
performance.
Two
common
polyelectrolytes,
poly(diallyldimethylammonium
chloride)
(PDADMAC)
poly(sodium
4-styrenesulfonate)
(PSS)
coated
onto
two
poly-piperazine
(NF270
Desal-5
DL).
The
effects
bilayers
number
outer
layer
charge
on
membranes'
performance
studied
using
crossflow
filtration
setups
different
membrane
sizes
find
higher
monovalent/multivalent
factor.
DL
5.5
provided
highest
selectivity
for
mono/multivalent
cations
(>
21),
average
rejection
group
(about
95.7%)
short-term
experiments.
Another
interesting
result
was
increase
water
permeance
after
it
bLs
(indicating
more
than
20%
improvement
pure
permeance).
In
addition,
stability
test
brines
at
20
bar
showed
that
stable
over
an
extended
period
(22
hours)
even
factor
34
97.7%
average.