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.
