Sustainability,
Год журнала:
2023,
Номер
15(23), С. 16173 - 16173
Опубликована: Ноя. 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
ACS ES&T Engineering,
Год журнала:
2023,
Номер
3(9), С. 1370 - 1380
Опубликована: Апрель 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.
Journal of Hazardous Materials,
Год журнала:
2024,
Номер
466, С. 133471 - 133471
Опубликована: Янв. 11, 2024
This
review
provides
a
comprehensive
overview
of
the
occurrence,
fate,
treatment
and
multi-criteria
analysis
microplastics
(MPs)
organic
contaminants
(OCs)
in
biosolids.
A
meta-analysis
was
complementarily
analysed
through
literature
to
map
out
occurrence
fate
MPs
10
different
groups
OCs.
The
data
demonstrate
that
(54.7%
rate)
linear
alkylbenzene
sulfonate
surfactants
(44.2%
account
for
highest
prevalence
In
turn,
dioxin,
polychlorinated
biphenyls
(PCBs)
phosphorus
flame
retardants
(PFRs)
have
lowest
rates
(<0.01%).
several
OCs
(e.g.,
per-
polyfluoroalkyl
substances,
polycyclic
aromatic
hydrocarbons,
pharmaceutical
personal
care
products,
ultraviolet
filters,
phosphate
retardants)
Europe
appear
at
higher
than
Asia
Americas.
However,
MP
concentrations
biosolids
from
Australia
are
reported
be
times
America
Europe,
which
required
more
measurement
in-depth
analysis.
Amongst
OC
groups,
brominated
exhibited
exceptional
sorption
with
partitioning
coefficients
(log
K
Environmental Science & Technology,
Год журнала:
2024,
Номер
58(18), С. 8076 - 8085
Опубликована: Апрель 25, 2024
Per-
and
polyfluoroalkyl
substances
(PFAS)
have
received
increased
attention
due
to
their
environmental
prevalence
threat
public
health.
Trifluoroacetic
acid
(TFA)
is
an
ultrashort-chain
PFAS
the
simplest
perfluorocarboxylic
(PFCA).
While
US
EPA
does
not
currently
regulate
TFA,
its
chemical
similarity
other
PFCAs
simple
molecular
structure
make
it
a
suitable
model
compound
for
studying
transformation
of
PFAS.
We
show
that
hydrothermal
processing
in
compressed
liquid
water
transforms
TFA
at
relatively
mild
conditions
(T
=
150–250
°C,
P
<
30
MPa),
initially
yielding
gaseous
products,
such
as
CHF3
CO2,
naturally
aspirate
from
solution.
Alkali
amendment
(e.g.,
NaOH)
promotes
mineralization
CHF3,
dissolved
fluoride,
formate,
carbonate
species
final
products.
Fluorine
carbon
balances
are
closed
using
Raman
spectroscopy
fluoride
ion
selective
electrode
measurements
experiments
performed
alkaline
conditions,
where
gas
yields
negligible.
Qualitative
FTIR
analysis
allows
establishing
pathways;
however,
F-balance
could
be
quantitatively
without
NaOH
amendment.
The
kinetics
under
measured,
showing
little
no
dependency
on
concentration,
indicating
thermal
decarboxylation
rate-limiting
step.
A
proposed
mechanism
motivates
additional
work
generalize
reaction
pathways
PFCAs.
Current Opinion in Chemical Engineering,
Год журнала:
2023,
Номер
41, С. 100943 - 100943
Опубликована: Июль 17, 2023
The
consensus
of
removing
per-
and
polyfluoroalkyl
substances
(PFAS)
from
the
environment
is
widely
recognized
enlightened
by
near-zero
standards
released
U.S.
Environmental
Protection
Agency
in
2023.
only
way
to
achieve
goal
zero
fluoro-pollution
fully
defluorinate
or
mineralize
PFAS,
but
current
technologies
partially
a
limited
number
which
can
lead
creation
potentially
more
toxic
short-chain
intermediates.
Therefore,
we
discuss
herein
need
broaden
scope
tested
summarize
state-of-the-art
degradation
technologies,
provide
perspectives
complete
defluorination.
Besides
fundamental
knowledge
gaps
defluorination
reactions,
technological
aspects
water
matrix
effects,
pilot
tests,
cost
analysis
also
limit
application
comparison
different
treatment
technologies.
This
work
would
shed
light
on
further
research
find
solutions
PFAS.
ACS ES&T Water,
Год журнала:
2023,
Номер
3(8), С. 2053 - 2062
Опубликована: Май 15, 2023
Supercritical
water
oxidation
(SCWO)
is
a
destruction
technology
to
treat
per-
and
polyfluoroalkyl
substance
(PFAS)-impacted
groundwater,
investigation-derived
waste,
other
aqueous
matrices
such
as
landfill
leachate
film-forming
foam.
A
SCWO
system,
Battelle's
PFAS
AnnihilatorTM,
was
optimized
with
goal
of
reducing
all
measured
non-detect
levels.
Laboratory-prepared
field-collected
samples
inlet
concentrations
up
50
ppm
were
consistently
destroyed
less
than
70
ppt
for
PFAS,
when
running
at
the
determined
optimal
operating
conditions
(≥600
°C
3500
pounds
per
square
inch).
We
investigated
correlation
between
temperature
flowrate
finding
that
reactor
temperatures
≥450
destroy
perfluorinated
carboxylic
acids,
but
≥575
are
necessary
perfluorosulfonic
acids.
continuous
5-log
reduction
in
concentration
(99.999%
destruction)
demonstrated
3
h
steady-state
operation.
The
efficiency
not
impacted
by
addition
co-contaminants
petroleum
hydrocarbons,
volatile
organic
compounds.
treated
effluent
largely
composed
complete
combustion
products
including
carbon
dioxide,
water,
corresponding
anion
acids;
hence,
liquid
can
be
released
back
into
environment
after
neutralization.
