AIChE Journal,
Journal Year:
2024,
Volume and Issue:
70(12)
Published: Aug. 21, 2024
Abstract
The
molecular
mechanisms
that
drive
adsorption
are
critical
for
engineering
new
adsorbents
to
capture
environmental
contaminants,
such
as
perfluoroalkyl
substances
(PFAS).
Metal–organic
frameworks
(MOFs)
have
been
shown
adsorb
some
classes
of
PFAS,
yet
a
fundamental
understanding
how
PFAS
identity
and
water
competition
affect
capacity
is
unknown.
Here,
grand
canonical
Monte
Carlo
simulations
perfluoroalkanoic
acids
(PFAAs)
in
the
MOF
NU‐1000
were
performed
with
coadsorbed
varying
carbon
chain
length
sizes
interrogate
structure
affects
capacity.
We
found
larger
PFAAs
favorably
into
than
shorter
due
formation
pore‐filling
aggregates
stabilize
anionic
node.
Due
their
size
hydrophilicity,
chains
tend
limit
interactions
adsorbent.
These
insights
offer
directions
developing
novel
materials
promote
aggregate
retain
wider
set
from
aqueous
solutions.
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
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.
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.
ACS Sensors,
Journal Year:
2024,
Volume and Issue:
9(6), P. 3403 - 3412
Published: June 3, 2024
Per-
and
polyfluoroalkyl
substances
(PFAS)
pose
a
significant
threat
to
the
environment
due
their
persistence,
ability
bioaccumulate,
harmful
effects.
Methods
quantify
PFAS
rapidly
effectively
are
essential
analyze
track
contamination,
but
measuring
down
ultralow
regulatory
levels
is
extremely
challenging.
Here,
we
describe
development
of
low-cost
sensor
that
can
measure
representative
PFAS,
perfluorooctanesulfonic
acid
(PFOS),
at
parts
per
quadrillion
(ppq)
level
within
5
min.
The
method
combines
PFOS
bind
silver
nanoparticles
(AgNPs)
embedded
fluorine-rich
Ti3C2-based
multilayered
MXene,
which
provides
large
surface
area
accessible
binding
sites
for
direct
impedimetric
detection.
Fundamentally,
show
MXene–AgNPs
capable
other
long-chain
compounds,
though
synergistic
action
AgNPs
MXenes
via
electrostatic
F–F
interactions.
This
induced
concentration-dependent
changes
in
charge-transfer
resistance,
enabling
rapid
quantification
with
high
sensitivity
no
response
interferences.
displayed
linear
range
from
50
ppq
1.6
ppt
(parts
trillion)
an
impressively
low
limit
detection
33
99
ppq,
making
this
promising
candidate
screening
content
water
samples,
using
simple
inexpensive
procedure.
As
regulatory
standards
for
per-
and
polyfluoroalkyl
substances
(PFAS)
become
increasingly
stringent,
innovative
water
treatment
technologies
are
urgently
demanded
effective
PFAS
removal.
Reported
sorbents
often
exhibit
limited
affinity
frequently
hindered
by
competitive
background
substances.
Recently,
fluorinated
(abbreviated
as
fluorosorbents)
have
emerged
a
potent
solution
leveraging
fluorine-fluorine
(F···F)
interactions
to
enhance
selectivity
efficiency
in
This
review
delves
into
the
designs
applications
of
fluorosorbents,
emphasizing
how
F···F
improve
binding
affinity.
Specifically,
existence
results
removal
efficiencies
orders
magnitude
higher
than
other
counterpart
sorbents,
particularly
under
conditions.
Furthermore,
we
provide
detailed
analysis
fundamental
principles
underlying
elucidate
their
synergistic
effects
with
sorption
forces,
which
contribute
enhanced
efficacy
selectivity.
Subsequently,
examine
various
fluorosorbents
synthesis
fluorination
techniques,
underscore
importance
accurately
characterizing
through
advanced
analytical
methods,
emphasize
significance
this
interaction
developing
selective
sorbents.
Finally,
discuss
challenges
opportunities
associated
employing
techniques
guide
design
advocate
further
research
development
sustainable
cost-effective
interactions.
International Journal of Molecular Sciences,
Journal Year:
2024,
Volume and Issue:
25(6), P. 3445 - 3445
Published: March 19, 2024
The
widespread
use
and
impervious
nature
of
per-
polyfluorinated
alkyl
substances
(PFASs)
is
leading
to
potentially
harmful
exposure
in
numerous
environments.
One
avenue
explore
remediation
PFAS-contaminated
environments
involves
investigating
how
well
PFASs
adsorb
onto
various
substrates.
In
the
current
review,
we
focus
on
summarizing
recent
computational
research,
largely
involving
density
functional
theory
(DFT)
molecular
dynamics
(MD),
into
adsorption
interaction
with
a
variety
substrates
an
aim
provide
insight
inspire
further
research
that
may
lead
solutions
this
critical
problem
impacts
environment
human
health.
ChemSusChem,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 22, 2024
Abstract
Per‐
and
polyfluoroalkyl
substances
(PFASs),
comprising
over
9,000
persistent
synthetic
organic
contaminants,
are
extensively
found
in
the
environment
pose
significant
risks
to
both
human
ecological
health.
Among
strategies
for
addressing
PFAS
contamination,
adsorption
processes
have
proven
be
cost‐effective.
Traditional
sorbents
such
as
ion‐exchange
resins
activated
carbon
been
exhibit
low
capacities
slow
equilibration
times.
Recent
innovations
porous
materials,
including
metal‐organic
frameworks
(MOFs),
covalent
(COFs),
polymers
(POPs),
however,
offer
improvements
efficiency
of
adsorption.
This
review
thoroughly
examines
latest
advancements
these
analyzing
their
mechanisms
adsorption,
concludes
by
suggesting
directions
future
research
that
could
further
enhance
effectiveness
management.
