Journal of Hazardous Materials Advances,
Journal Year:
2023,
Volume and Issue:
10, P. 100322 - 100322
Published: May 1, 2023
Per-
and
poly-fluoroalkyl
substances
(PFAS)
have
emerged
as
contaminants
of
great
concern
that
are
ubiquitously
detected
in
natural
aquatic
environments.
Strict
health
advisories
regulations
triggered
development
several
treatment
processes
to
remove
or
degrade
PFAS.
However,
the
main
challenge
affects
implementation
both
physical-separation
degradation
real
world
applications
is
quality
water
be
treated.
Organic
inorganic
constituents,
defining
quality,
accompany
PFAS
influent
processes.
Thus,
this
article
aims
provide
a
detailed
review
impacts
such
constituents
on
(i.e.,
carbon-based,
natural,
synthetic
adsorbents,
ion-exchange
resins,
membranes)
sonolysis,
photochemical,
electrochemical,
heat-activated
persulfate,
plasma-based
treatment,
ionizing
radiation)
Depending
mechanisms,
solutes
shown
inhibitory,
promotive,
neutral
effects
treatment.
This
elucidates
matrix
largely
dependent
(1)
organic
matters
characteristics
(e.g.,
molecular
weight,
aromaticity,
functional
groups),
(2)
operational
parameters
type
resin,
anode
material,
surface
charge
solution
pH),
(3)
properties
chain
length
group).
The
information
data
presented
here
beneficial
from
theoretical
practical
perspectives
for
degradation.
ACS ES&T Engineering,
Journal Year:
2023,
Volume and Issue:
3(9), P. 1370 - 1380
Published: April 26, 2023
In
this
study,
we
have
developed
an
innovative
thermal
degradation
strategy
for
treating
per-
and
polyfluoroalkyl
substance
(PFAS)-containing
solid
materials.
Our
satisfies
three
criteria:
the
ability
to
achieve
near-complete
of
PFASs
within
a
short
timescale,
nonselectivity,
low
energy
cost.
our
method,
metallic
reactor
containing
PFAS-laden
sample
was
subjected
electromagnetic
induction
that
prompted
rapid
temperature
rise
via
Joule
heating
effect.
We
demonstrated
subjecting
(0.001–12
μmol)
brief
duration
(e.g.,
<40
s)
resulted
in
substantial
(>90%)
these
compounds,
including
recalcitrant
short-chain
perfluoroalkyl
sulfonic
acids.
This
finding
us
conduct
detailed
study
phase
transitions
using
thermogravimetric
analysis
differential
scanning
calorimetry
(DSC).
identified
at
least
two
endothermic
DSC
peaks
anionic,
cationic,
zwitterionic
PFASs,
signifying
melting
evaporation
melted
PFASs.
Melting
points
many
were
reported
first
time.
data
suggest
rate-limiting
step
PFAS
is
linked
with
evaporation)
occurring
on
different
time
scales.
When
are
rapidly
heated
temperatures
similar
those
produced
during
heating,
slows
down,
allowing
PFAS.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(19), P. 7634 - 7643
Published: May 4, 2023
Advanced
reduction
processes
(ARP)
have
garnered
increasing
attention
for
the
treatment
of
recalcitrant
chemical
contaminants,
most
notably
per-
and
polyfluoroalkyl
substances
(PFAS).
However,
impact
dissolved
organic
matter
(DOM)
on
availability
hydrated
electron
(eaq–),
key
reactive
species
formed
in
ARP,
is
not
completely
understood.
Using
pulse
radiolysis
transient
absorption
spectroscopy,
we
measured
bimolecular
reaction
rates
constant
eaq–
with
eight
aquatic
terrestrial
humic
substance
natural
isolates
(
kDOM,eaq–),
resulting
values
ranging
from
(0.51
±
0.01)
to
(2.11
0.04)
×
108
MC–1
s–1.
kDOM,eaq–
measurements
at
varying
temperature,
pH,
ionic
strength
indicate
that
activation
energies
diverse
DOM
are
≈18
kJ
mol–1
could
be
expected
vary
by
less
than
a
factor
1.5
between
pH
5
9
or
an
0.02
0.12
M.
exhibited
significant,
positive
correlation
%
carbonyl
carbon
studied,
but
relationships
other
physicochemical
properties
were
surprisingly
more
scattered.
A
24
h
UV/sulfite
experiment
employing
chloroacetate
as
probe
revealed
continued
exposure
abates
chromophores
scavenging
capacity
over
several
hour
time
scale.
Overall,
these
results
important
scavenger
will
reduce
rate
target
contaminant
degradation
ARP.
These
impacts
likely
greater
waste
streams
like
membrane
concentrates,
spent
ion
exchange
resins,
regeneration
brines
elevated
concentrations.
Environmental Science Nano,
Journal Year:
2024,
Volume and Issue:
11(5), P. 1915 - 1925
Published: Jan. 1, 2024
This
study
investigated
the
adsorption
of
PFOA
and
PFOS
by
nanoscale
zero-valent
iron,
revealing
mechanism
enriching
understanding
environmental
remediation.
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.
