Pervaporation
membrane
reactors
attract
much
attention
as
a
promising
system,
in
which
separation
and
reaction
are
carried
out
simultaneously
to
overcome
the
thermodynamic
equilibrium
limitation
increase
conversion
by
removing
one
or
several
synthesized
products.
For
this,
this
study
supported
carboxymethyl
cellulose
(CMC)
membranes
modified
with
Zn-based
metal
organic
frameworks
(Zn(SEB),
Zn(BIM),
Zn(BDC)Si)
were
developed.
Transport
properties
of
obtained
evaluated
pervaporation
quaternary
mixtures
(acetic
acid
(AcOH),
ethanol
(EtOH),
ethyl
acetate
(EtAc),
water)
various
compositions.
CMC/Zn(BIM)
membranes,
possessed
optimal
transport
characteristics,
tested
hybrid
process
"reaction+pervaporation"
using
batch
reactor
compared
data
without
membrane.
The
changes
structure
physicochemical
developed
studied
spectroscopic,
microscopic
methods,
thermogravimetric
analysis
measurements
contact
angles.
To
confirm
findings
obtained,
theoretical
consideration
computational
methods
for
was
out.
It
shown
that
application
CMC/Zn(BIM)(10
wt.%)
pervaporation-assisted
esterification
led
formation
more
than
5
times
larger
amount
EtAc
decreased
AcOH
EtOH
(50/50
M)
wt.%
Amberlyst
15
catalyst
at
60°C.
Polymers,
Год журнала:
2023,
Номер
15(6), С. 1341 - 1341
Опубликована: Март 7, 2023
Nowadays,
nanofiltration
is
actively
used
for
water
softening
and
disinfection,
pre-treatment,
nitrate,
color
removal,
in
particular,
heavy
metal
ions
removal
from
wastewater.
In
this
regard,
new,
effective
materials
are
required.
the
present
work,
novel
sustainable
porous
membranes
cellulose
acetate
(CA)
supported
consisting
of
CA
substrate
with
a
thin
dense
selective
layer
carboxymethyl
(CMC)
modified
first-time
synthesized
Zn-based
metal–organic
frameworks
(Zn(SEB),
Zn(BDC)Si,
Zn(BIM))
were
developed
to
increase
efficiency
ions.
MOFs
characterized
by
sorption
measurements,
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM).
The
obtained
studied
spectroscopic
(FTIR),
standard
porosimetry
microscopic
(SEM
AFM)
methods,
contact
angle
measurement.
support
was
compared
other,
prepared
substrates
poly(m-phenylene
isophthalamide)
polyacrylonitrile.
Membrane
performance
tested
model
real
mixtures
containing
improvement
transport
properties
achieved
through
MOF
modification
due
their
structure,
hydrophilic
properties,
different
particle
shapes.
Journal of Materials Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 8, 2025
Abstract
Water
contamination
has
become
a
significant
global
issue
in
recent
decades,
with
pollutants,
such
as
heavy
metals,
acids,
organic
solvents,
and
pharmaceutical
waste
contributing
to
environmental
degradation.
Various
techniques
are
employed
for
treating
wastewater,
but
metal–organic
frameworks
(MOFs)
gaining
increasing
attention
due
their
unique
properties.
MOFs
offer
exceptional
porosity,
modular
structures,
high
crystallinity,
customizable
chemical
components,
large
specific
surface
area,
simple
functionalization,
numerous
active
sites.
These
coordination
compounds
consist
of
poly-nuclear
metal
nodes
linkers,
forming
highly
porous
structures.
This
review
focuses
on
MOF-based
membrane
separation
techniques,
including
filtration
(MF),
nanofiltration,
solvent
ultrafiltration
(UF),
microfiltration,
forward
osmosis,
reverse
pervaporation,
distillation,
along
mechanisms
removing
waste.
have
shown
great
promise
enhancing
performance
by
improving
adsorption
capacities,
water
flow
rates,
optimizing
Integrating
materials
like
graphene
oxide,
titania,
silica
further
improved
performance.
Additionally,
green
synthesis
methods
being
developed
create
eco-friendly
sustainable
wastewater
treatment.
demonstrate
effective
capacities
various
contaminants,
antibiotics,
tetracycline,
nitroimidazole,
quinolone.
Functionalizing
groups
been
enhance
efficiency.
Overall,
potential
advancing
treatment
addressing
challenges.
Polymers,
Год журнала:
2024,
Номер
16(9), С. 1236 - 1236
Опубликована: Апрель 28, 2024
Recently,
increasing
attention
of
researchers
in
the
field
membrane
technology
has
been
paid
to
development
membranes
based
on
biopolymers.
One
well-proven
polymers
for
porous
is
cellulose
acetate
(CA).
This
paper
devoted
study
influence
different
parameters
ultrafiltration
CA
formation
and
their
transport
properties,
such
as
variation
coagulation
bath
temperature,
shrinkage
(post-treatment
at
80
°C),
introduction
casting
solution
(polyethylene
glycol
(PEG),
polysulfone
(PS),
Pluronic
F127
(PL))
carbon
nanoparticles
(SWCNTs,
MWCNTs,
GO,
C60).
The
structural
physicochemical
properties
developed
were
studied
by
scanning
electron
atomic
force
microscopies,
Fourier-transform
infrared
spectroscopy,
X-ray
photoelectron
contact
angle
measurements.
CA-based
evaluated
bovine
serum
albumin
(BSA),
dextran
110
PVP
K-90.
All
rejected
90%
compounds
with
a
molecular
weight
from
~270,000
g/mol.
It
was
shown
that
combination
modifications
(addition
PEG,
PS,
PL,
PS-PL,
0.5
wt%
C60)
led
an
increase
fluxes
BSA
rejection
coefficients
slight
decrease
flux
recovery
ratio.
These
changes
due
increased
macrovoid
number,
more
open
structure
and/or
thinner
top
selective,
decreased
surface
roughness
hydrophobization
during
C60
modification
blend
membranes.
Optimal
found
CA-PEG+C60
(the
highest
water—394
L/(m2h)
BSA—212
fluxes)
CA-PS+C60
(maximal
coefficient
BSA—59%)
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 13, 2025
ABSTRACT
In
the
study,
rejection
of
some
metals
from
synthetic
and
wastewater
was
carried
out
by
pervaporation
method
using
poly(vinyl
alcohol)/benzoxazine
(PVA/Bz)
membranes.
For
this
purpose,
monomeric
or
polymeric
benzoxazines
were
first
synthesized
characterized.
Subsequently,
PVA/benzoxazine
membranes
prepared
their
morphologies
Afterward,
removal
selected
heavy
Cr(VI),
Fe(II),
Ni(II),
Cd(II),
Cu(II),
Mn(II)
water
studied
The
(PVA/BBz)
demonstrated
efficacy
in
comparison
to
(PVA/PBz)
for
water.
However,
studies
conducted
with
real
also
showed
same
tendency
as
highest
separation
factor
observed
827%
at
a
flux
1.98
kg/m
2
.h
Ni(II)
solution
699%
1.13
PVA/BBz
1
membrane.
This
offers
significant
advantage
not
only
removing
but
allowing
concentrated
feed
serve
raw
material
source
various
industrial
sectors.
Polymers,
Год журнала:
2025,
Номер
17(10), С. 1306 - 1306
Опубликована: Май 10, 2025
Industrial
wastewater
poses
a
significant
environmental
challenge
due
to
its
harmful
effects.
The
development
of
sustainable
membrane
processes
for
water
treatment
and
the
environmentally
friendly
production
polymer
membranes
is
one
major
challenges
our
time.
An
alternative
approach
prepare
polyelectrolyte
complex
(PEC)
using
aqueous
phase
separation
(APS)
method
without
use
toxic
solvents.
In
this
work,
PEC
nanofiltration
poly(sodium-p-styrenesulfonate)
(PSS)/polyethylenimine
(PEI)
modified
with
carbon
nanoparticles
(graphene
oxide,
polyhydroxylated
fullerene
(HF),
multi-walled
nanotubes)
were
developed
enhanced
from
anionic
food
dyes
heavy
metal
ions.
effect
varying
PSS/PEI
monomer
ratio,
nanoparticles,
content
optimal
HF
modifier,
cross-linking
agent
on
properties
was
studied
in
detail.
changes
structure
physicochemical
PEC-based
investigated
spectroscopic,
microscopic,
thermogravimetric
analysis
methods,
contact
angle
measurements.
PSS
PEI
interactions
during
formation
protonation
computational
methods.
cross-linked
PEC/HF(1%)
(1:1.75
PSS/PEI)
had
more
than
2
times
higher
permeability
compared
pristine
membrane,
dye
ion
rejection
99.99
>97%,
respectively.
