Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 17, 2025
The
purification
of
organic
dye
pollutants
and
insoluble
emulsified
oils
in
wastewater
has
become
a
critical
focus
environmental
research.
In
this
study,
fibrous
membranes
were
prepared
through
electrostatic
spinning
by
first
hydrolyzing
polyacrylonitrile
then
blending
it
with
water-soluble
polyvinylpyrrolidone
(PVP).
Subsequent
hydrothermal
treatment
was
applied
to
partially
remove
PVP
from
the
fibers,
creating
rough
porous
surfaces
that
exposed
more
functional
carboxyl
groups
increased
fibers'
specific
surface
area.
resulting
exhibited
superhydrophilicity
(≈0°)
underwater
superoleophobicity
(≈157°),
alongside
excellent
fouling
resistance.
membranes,
characterized
their
carboxyl-rich
surfaces,
improved
adsorption
capabilities
for
cationic
dyes,
attaining
capacities
735.77
mg/g
malachite
green,
429.31
methylene
blue,
607.21
crystal
violet.
achieved
remarkable
separation
efficiency
99.8%
oil-in-water
emulsions
maintained
98.5%
after
10
cycles
elution,
highlighting
outstanding
regeneration
capability.
summary,
study
demonstrates
these
are
highly
effective
removing
dyes
wastewater.
show
great
potential
applications
treatment,
particularly
selective
removal
oil-water
separation.
Journal of Applied Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 23, 2025
ABSTRACT
The
exploitation,
transportation,
and
utilization
of
various
oil
products
frequently
generate
substantial
volumes
oily
wastewater,
making
the
development
efficient
treatment
methods
imperative
for
addressing
environmental
pollution
water
scarcity.
In
this
study,
sodium
hypochlorite
was
first
employed
to
oxidize
etch
surface
nylon
mesh
separation
membrane
(NFM),
resulting
in
a
modified
NFM
(M‐NFM)
characterized
by
unique
honeycomb‐like
porous
structure
an
abundance
oxygen‐containing
functional
groups.
Subsequently,
hydrophilic
positively
charged
UiO‐66‐NH
2
particle
layer
is
situ
synthesized
on
surface,
capitalizing
abundant
nucleation
sites
offered
carboxyl
groups
within
honeycomb
framework,
yielding
composite
M‐NFM/UiO‐66‐NH
(M‐NFMU).
To
further
enhance
oil–water
performance
membrane,
surface‐functionalized
cellulose
nanocrystals
(SF‐CNC)
graphene
oxide
(GO)
were
sequentially
adsorbed
onto
M‐NFMU
through
synergetic
self‐assembly
strategy.
This
process
led
formation
hierarchical
micro‐nano
NFM,
ultimately
producing
designated
as
M‐NFM@UiO‐66‐NH
/SF‐CNC/GO
(M‐NFMUCG).
During
process,
molecules
engage
hydrogen‐bonding
interactions
with
amine,
carboxyl,
hydroxyl
present
,
SF‐CNC,
GO
structures.
interaction
effectively
captures
stabilizes
film
M‐NFMUCG
preventing
from
coming
into
contact
it.
As
result,
exhibits
remarkable
superhydrophilicity,
exceptional
resistance,
outstanding
performance,
achieving
permeate
flux
up
16,361
L
m
h
−1
rejection
rate
exceeding
99.9%
under
gravity.
Moreover,
membranes
exhibit
excellent
chemical
stability
salt
underscoring
their
significant
potential
wastewater.
