Cationic Nanoparticle Networks (CNNs) with Remarkably Efficient, Simultaneous Adsorption of Microplastics and PFAS
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 10, 2025
Of
the
past
decade,
micro/nanoplastics
(MP/NP)
and
per-
polyfluoroalkyl
substances
(PFAS)
have
become
two
of
most
pervasive
persistent
organic
pollutants
leading
to
significant
accumulation
within
waterways.
Various
sorbent
materials
been
evaluated
for
PFAS
MP/NP
removal,
but
their
simultaneous
removal
has
rarely
explored.
Herein,
we
report
a
library
polymer-based,
cationic
nanoparticle
networks
(CNN)
with
systematic
variation
in
surface
charge
density,
polymer
molecular
weight,
size
anionic
from
aqueous
solutions.
These
are
synthesized
three,
one-pot
steps
starting
polymerization-induced
self-assembly
(PISA)
followed
by
rapid
photocuring
quaternary
ammonium
salt
formation
resulting
3D
consisting
solely
nanoparticles.
Our
best
performing
CNN
material
demonstrated
record-high
MP
capacities
Qmax
=
1865
mg/g
KF
58.0
(mg/g)(L/mg)1/n
based
on
Langmuir
Freundlich
isotherm
model
estimations,
respectively.
Furthermore,
efficient
NPs
MPs
complex
water
media,
such
as
seawater
at
different
pH
values,
demonstrating
overall
applicability.
Finally,
perfluorooctanoic
acid
(PFOA)
was
accomplished
similar
(MP)
478.4
134.6
allowing
dual
use.
Язык: Английский
Partitioning and removal of per- and polyfluoroalkyl substances (PFAS) in full-scale surface flow treatment wetlands with different upstream wastewater treatment
Journal of Water Process Engineering,
Год журнала:
2025,
Номер
71, С. 107236 - 107236
Опубликована: Фев. 13, 2025
Язык: Английский
Hybrid Adsorption–Microfiltration Process for the Pretreatment of Sulfide-Containing Seawater: A Promising Strategy to Mitigate Membrane Fouling
Membranes,
Год журнала:
2025,
Номер
15(4), С. 100 - 100
Опубликована: Март 31, 2025
The
presence
of
dissolved
sulfides
in
feed
seawater
causes
severe
elemental
sulfur
fouling
the
reverse
osmosis
(RO)
process.
However,
current
pretreatment
methods
suffer
from
large
footprint,
high
energy
consumption,
and
limitations
effluent
quality.
In
this
study,
adsorption
microfiltration
are
merged
into
a
single
process
for
sulfide-containing
seawater.
Powdered
activated
carbon
(PAC)
was
selected
its
superior
capacity
(14.6-fold)
faster
kinetics
(3.9-fold)
sulfide
removal
compared
to
granular
carbon.
surface
area
multiple
pore
structures
PAC
facilitate
intraparticle
diffusion,
as
well
anion–π
conjugation
likely
occur
between
sulfide.
Polypropylene
microporous
membranes,
capable
tolerating
dosages,
were
used
hybrid
Long-term
pilot
tests
demonstrated
that
(turbidity
<
1
NTU
SDI15
≈
2.50)
met
quality
requirements
RO
unit
feedwater,
achieving
100%
efficiency
over
101
h,
with
no
risk
leakage
throughout
entire
operation
formation
loose,
porous
cake
layer
alleviates
membrane
enhances
retention
metal(loid)s
Moreover,
low
permeate
flux
polymeric
membranes
significantly
mitigates
filter
formation.
system
adapts
variations
feedwater
quality,
making
it
highly
suitable
desalination
plants
limited
space
budget.
These
findings
offer
valuable
insights
practical
guidance
advancing
pretreatment.
Язык: Английский
Application of VUV/Sulfite Defluorination System for the Simple Detection of Perfluoroalkyl Substances
Molecules,
Год журнала:
2025,
Номер
30(11), С. 2475 - 2475
Опубликована: Июнь 5, 2025
This
study
investigated
the
defluorination
of
PFOA
and
PFOS
using
a
vacuum
ultraviolet
(VUV)/sulfite
system,
evaluated
its
potential
application
in
quantifying
individual
perfluoroalkyl
substances
(PFAS).
Results
showed
that
81.9%
87.5%
were
achieved
after
120
min
photoreaction
under
conditions
pH
12
20
mM
sulfite.
Higher
sulfite
dosage
facilitated
reaction,
while
competing
ions
could
suppress
efficiency.
Based
on
optimized
for
PFAS,
fluoride
release
amount,
as
an
indirect
quantification
indicator,
was
further
assessed.
A
strong
linearity
between
initial
PFAS
concentration
(R2
>
0.999)
observed
range
2–100
μM,
such
also
shown
presence
sediment
leachates.
correlation
enabled
estimation
concentrations
by
measuring
treatment.
The
approach
demonstrated
adsorption
experiment,
where
calculated
distribution
coefficients
(Koc)
PFAS–sediment
interactions
consistent
with
previously
reported
values,
supporting
analytical
validity
method
controlled
conditions.
Overall,
this
work
presents
simple
cost-effective
strategy
applying
VUV/sulfite
system
quantitative
detection
complex
environmental
matrices.
Язык: Английский