Sustainability,
Journal Year:
2023,
Volume and Issue:
15(23), P. 16173 - 16173
Published: Nov. 21, 2023
Per
and
polyfluoroalkyl
substances
(PFAS)
have
been
extensively
employed
in
a
broad
range
of
manufacturing
consumer
goods
due
to
their
highly
persistent
nature.
PFAS
exposure
is
recognized
pose
serious
health
hazards;
therefore,
addressing
pollution
water
has
become
top
priority
for
public
environmental
protection
organizations.
This
review
article
focuses
on
the
efficiency
different
removal
techniques
(activated
carbon,
biochar,
ion
exchange
resin,
membrane
filtration,
reverse
osmosis,
metal-organic
frameworks,
foam
fractionation,
ozone
destruction
techniques)
eliminating
types
short-
long-chain
from
water.
Hydrophobicity
electrostatic
interactions
are
revealed
be
primary
mechanisms
elimination
PFAS.
The
all
eradicate
short-chain
comparatively
lower
compared
most
efficient
but
some
drawbacks,
including
formation
precursors
high
operational
costs.
According
findings
study,
it
anticipated
that
combined
methods
will
required
effectively
remediate
PFAS-contaminated
Emerging contaminants,
Journal Year:
2024,
Volume and Issue:
10(3), P. 100303 - 100303
Published: Feb. 8, 2024
and
polyfluoroalkyl
substances
(PFAS)
are
a
class
of
ubiquitous,
persistent,
hazardous
pollutants
that
raise
concerns
for
human
health
the
environment.
Typically,
PFAS
removal
from
water
relies
on
adsorption
techniques
using
conventional
sorption
materials
like
activated
carbons
(ACs)
ion
exchange
resins
(IERs).
However,
there
is
continuous
search
more
efficient
performing
adsorbent
to
better
address
wide
range
chemical
structures
in
environment,
increase
their
selectivity,
achieve
an
overall
high
capacity
faster
uptake
kinetics.
In
this
context,
results
application
non-conventional
(i.e.,
readily
available
biological-based
proteins
advanced
nanocomposites
cyclodextrins)
reported
discussed
consideration
following
criteria:
i)
efficiency
kinetics
legacy
(e.g.,
PFOA,
PFBA)
as
well
newly-introduced
emerging
GenX),
ii)
representativity
environmental
conditions
experimental
setup
use
environmentally
relevant
concentrations),
iii)
regenerability,
reusability
applicability
materials,
iv)
role
material
modifications
adsorption.
From
review,
it
emerged
organic
frameworks,
nano(ligno)cellulosic-based
layered
double
hydroxides
among
most
promising
herein
investigated
adsorption,
was
also
observed
presence
fluorine-
amine-moieties
structure
improve
both
selectivity
uptake.
lack
data
real
environments
costs
involved
means
research
still
its
infancy
need
further
investigation.
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(6), P. 2815 - 2829
Published: Feb. 1, 2024
The
increasing
health
risks
posed
by
per-
and
polyfluoroalkyl
substances
(PFASs)
in
the
environment
highlight
importance
of
implementing
effective
removal
techniques.
Conventional
wastewater
treatment
processes
are
inadequate
for
removing
persistent
organic
pollutants.
Recent
studies
have
increasingly
demonstrated
that
metal–organic
frameworks
(MOFs)
capable
PFASs
from
water
through
adsorption
However,
there
is
still
constructive
discussion
on
potential
MOFs
adsorbing
large-scale
engineering
applications.
This
review
systematically
investigates
use
as
adsorbents
PFAS
treatment.
primarily
involved
a
comprehensive
analysis
existing
literature
to
understand
mechanisms
identify
factors
enhance
their
efficiency
PFASs.
We
also
explore
critical
aspects
regeneration
stability
MOFs,
assessing
reusability
long-term
performance,
which
essential
Finally,
our
study
highlights
challenges
using
MOFs.
Especially,
efficient
short-chain
with
hydrophilicity
major
challenge,
while
medium-
long-chain
frequently
susceptible
being
captured
multiple
synergistic
effects.
ion-exchange
force
may
be
key
solving
this
difficulty,
but
its
susceptibility
ion
interference
needs
addressed
practical
hope
can
provide
valuable
insights
into
well
advance
sustainable
utilization
field
treatment,
thereby
presenting
novel
perspective.
ACS Applied Engineering Materials,
Journal Year:
2024,
Volume and Issue:
2(1), P. 143 - 155
Published: Jan. 18, 2024
The
ubiquity
of
per-
and
poly-fluoroalkyl
substances
(PFASs)
in
production
usage,
coupled
with
their
enduring
presence
mobility
within
the
environment,
has
underscored
significant
human
exposure.
Membrane
filtration
adsorption
processes
stand
as
principal
effective
means
for
PFAS
elimination
from
water,
each
contributing
to
distinct
separation
attributes.
While
thin-film
composite
(TFC)
nanofiltration
(NF)
membranes
achieve
satisfactory
removal
(<90%),
rejected
concentrated
stream
necessitates
supplementary
measures.
This
study
presents
development
adsorptive
nanocomposite
(TFN)
NF
membranes,
functionalized
submicron
(∼500
nm)
activated
carbon
(SFAC),
enhance
perfluorooctanesulfonic
acid
(PFOS)
via
during
water
filtration.
membrane
was
fabricated
on
a
poly(ether
sulfone)
support
layer
polyamide
(PA)
selective
by
immobilization
SFAC
inside
PA
interfacial
polymerization
(IP).
effect
piperazine
trimesoyl
chloride
transport
IP
process
consequently
attributes
encompassing
morphology
chemistry,
performance
(permeability
rejection)
investigated.
resulting
SFAC-TFN
optimal
loading
showcased
remarkable
PFOS
efficiency
94%,
where
over
80%
attributed
adsorption.
Furthermore,
these
exhibited
heightened
permeability
while
maintaining
marginal
salt
rejection
reduction
comparison
bare
TFC
membranes.
Remarkably,
sustained
even
after
four
regeneration
cycles,
employing
50%
ethanol/water
solution
regeneration.
findings
offer
insights
into
synergy
mechanisms,
indicating
promising
avenues
advanced
treatment
strategies.
