Atmospheric Environment,
Год журнала:
2024,
Номер
334, С. 120716 - 120716
Опубликована: Июль 26, 2024
Environmental
pollution
by
per-
and
polyfluoroalkyl
substances
(PFAS),
commonly
known
as
"forever
chemicals",
is
a
major
concern.
Numerous
studies
have
identified
PFAS
in
various
environmental
matrices
including
groundwater,
surface
water,
sea,
soil,
atmosphere.
Nevertheless,
the
atmospheric
presence
of
remains
an
underexplored
area.
The
exact
sources
atmosphere
mechanisms
governing
their
transfer
remain
largely
elusive.
In
this
study,
we
investigated,
for
first
time,
influence
aeration
on
aqueous-to-air
transfer,
range
short-,
medium-,
long-chain
from
aqueous
solutions
contaminated
with
at
concentrations
pHs
relevant
to
those
industrial
wastewater
treatment.
enriched
aerosols
were
generated
under
three
tested
pH
conditions
which
found
affect
partitioning
individual
PFAS.
extent
aerosolisation
also
showed
clear
dependence
analyte's
carbon
chain
length
functional
groups.
Specifically,
propensity
into
increased
increasing
length.
Notably,
perfluorosulfonic
acids
(PFSA)
demonstrated
greater
potential
compared
perfluorocarboxylic
(PFCA).
Legacy
perfluorooctanoic
acid
(PFOA)
(PFOS)
new
generation
replacement
8:2
Fluorotelomer
sulfonate
(8:2
FTS)
significant
solutions.
Our
results
suggest
that
processes
involving
water
(including
industry)
could
potentially
act
source
Reviews of Geophysics,
Год журнала:
2022,
Номер
60(3)
Опубликована: Авг. 7, 2022
Abstract
Per‐
and
polyfluoroalkyl
substances
(PFASs),
also
known
as
“forever
chemicals,”
are
manmade
chemicals
that
have
been
increasingly
detected
in
various
geological
settings
since
the
early
2000s.
The
soil
subsurface
environments
media
commonly
affected
by
PFAS.
We
conducted
a
comprehensive
review
of
peer‐reviewed
articles
published
from
2010
through
2022
concerning
fate
transport
PFAS
environments.
This
is
organized
into
different
subsections,
covering
basics
properties
how
they
affect
occurrence,
fate,
PFAS,
fundamental
processes
affecting
mathematical
models
for
describing
predicting
behaviors.
Mechanisms
governing
environment,
including
sorption
at
air‐water
interface,
solid‐water
nonaqueous
phase
liquids‐water
were
explored
detail.
Challenges
future
research
priorities
identified
to
better
mitigate
global
challenges
contamination.
Abstract
Per-
and
polyfluoroalkyl
substances
(PFASs),
commonly
known
as
‘‘forever
chemicals’’,
are
persistent
organic
pollutants
that
widely
distributed
in
the
environment.
Due
to
their
toxicity
resistance
degradation,
PFASs
classified
emerging
contaminants,
increasing
attention
is
being
paid
remediation.
Biochar,
an
environmentally
friendly
cost-effective
adsorbent,
shows
potential
for
remediating
contamination.
The
application
of
biochar
remediation
has
garnered
growing
interest.
Compared
other
adsorbents,
more
economical
raw
materials
its
preparation
readily
available.
However,
there
currently
no
comprehensive
review
summarizing
effects
on
environmental
behavior
PFASs.
This
aims
fill
gap
by
providing
in-depth
discussion
synthesis
existing
literature
this
area.
It
focuses
PFASs,
specifically
addressing
adsorption
mechanisms
factors
influencing
effectiveness
A
proposed
mechanism
which
photodegrades
through
generation
free
radicals,
addition
conventional
(such
pore
filling,
hydrogen
bonding,
hydrophobic
interactions,
electrostatic
interactions),
explored.
Furthermore,
discusses
ability
reduce
likelihood
entering
food
chain
water
soil
evaluates
feasibility
limitations
using
removal.
Finally,
we
identify
future
research
directions
support
safe
effective
use
remediation,
so
promote
advancement
green
technologies.
Graphic
Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 21, 2025
Per-
and
polyfluoroalkyl
substances
(PFAS)─so-called
"forever
chemicals"─contaminate
the
drinking
water
of
about
100
million
people
in
U.S.
alone
are
inefficiently
removed
by
standard
treatment
techniques.
A
key
property
these
compounds
that
underlies
their
fate
transport
efficacy
several
promising
remediation
approaches
is
they
accumulate
at
water–air
interface.
This
phenomenon
remains
incompletely
understood,
particularly
under
conditions
relevant
to
natural
systems
where
interfaces
often
carry
significant
loads
other
organic
contaminants
or
matter.
To
understand
impact
loading
on
PFAS
adsorption,
we
carried
out
molecular
dynamics
simulations
varying
interfacial
densities.
We
find
adsorbed
form
strong
mutual
interactions
(attraction
between
perfluoroalkyl
chains
electrostatic
among
charged
head
groups)
give
rise
ordered
coatings.
These
involve
near-cancellation
hydrophobic
attraction
Coulomb
repulsion.
Our
findings
explain
an
apparent
paradox
whereby
adsorption
isotherms
suggest
minimal
while
simultaneously
displaying
a
high
sensitivity
composition
density
Consideration
present
with
interface
has
potential
allow
for
more
accurate
predictions
design
efficient
approaches.
Environmental Science Advances,
Год журнала:
2023,
Номер
2(8), С. 1019 - 1041
Опубликована: Янв. 1, 2023
Biotransformation
of
per-
and
polyfluoroalkyl
substances
(PFAS)
has
received
growing
attention
as
more
research
becomes
available
indicating
that
bioremediation
may
have
a
future
role
to
play
in
addressing
PFAS
contamination.
Environmental Pollution,
Год журнала:
2024,
Номер
346, С. 123575 - 123575
Опубликована: Фев. 14, 2024
We
have
investigated
the
occurrence,
distribution,
and
biomagnification
of
per-
polyfluoroalkyl
substances
(PFAS)
in
two
tropical
lakes
(Asejire
Eleyele)
Southwestern
Nigeria,
with
contrasting
urban
intensities.
Over
an
8-month
period,
we
sampled
sediment
fish
species
(Clarias
gariepinus:
CIG;
Oreochromis
niloticus:
ON;
Coptodon
guineensis:
CG;
Sarotherodon
melanotheron:
SM)
across
trophic
levels,
analyzed
various
PFAS
congeners,
addition
to
a
select
group
toxicological
responses.
While
herbivores
(SM)
benthic
omnivores
(CIG)
at
Asejire
exhibited
elevated
levels
PFBS
PFOS,
pelagic
(ON)
showed
dominance
PFDA,
PFHxDA
EtFOSE
muscle.
At
Eleyele
lake,
patterns
was
dominated
by
PFBS,
EtFOSE,
PFPeS,
PFOcDA
PFOS
(SM,
CG),
omnivore
(ClG).
The
estimated
factor
(BMF)
analysis
for
both
indicated
level
increase
PFUnA
PFDA
suburban
while
biomagnified
lake.
detected
occurrence
diSAMPAP
9CL-PF3ONS,
novel
compounds
not
commonly
reported,
studies
lakes.
studied
responses
varied
groups
probable
modulations
environmental
conditions,
structure,
relative
exposures
present
study
documents,
first
time
or
any
other
African
country,
role
urbanization
on
contaminant
load
into
environment
their
implications
dynamics
within
ecosystem
aquatic
food
safety.
Applied and Environmental Microbiology,
Год журнала:
2024,
Номер
90(4)
Опубликована: Март 17, 2024
ABSTRACT
Per-
and
polyfluoroalkyl
substances
(PFAS)
are
highly
fluorinated
synthetic
organic
compounds
that
have
been
used
extensively
in
various
industries
owing
to
their
unique
properties.
The
PFAS
family
encompasses
diverse
classes,
with
only
a
fraction
being
commercially
relevant.
These
found
the
environment,
including
water
sources,
soil,
wildlife,
leading
human
exposure
fueling
concerns
about
potential
health
impacts.
Although
degradation
is
challenging,
biodegradation
offers
promising,
eco-friendly
solution.
Biodegradation
has
effective
for
variety
of
contaminants
but
yet
be
successful
due
paucity
identified
microbial
species
capable
transforming
these
compounds.
Recent
studies
investigated
biotransformation
fluoride
release;
however,
number
specific
microorganisms
enzymes
demonstrable
activity
remains
limited.
This
review
discusses
could
metabolism,
haloacid
dehalogenases,
reductive
cytochromes
P450,
alkane
butane
monooxygenases,
peroxidases,
laccases,
desulfonases,
mechanisms
resistance
intracellular
fluoride.
Finally,
we
emphasize
enzyme
engineering
advance
strategies
provide
insights
future
research
this
field.
Chemical Engineering Journal,
Год журнала:
2024,
Номер
493, С. 152537 - 152537
Опубликована: Май 24, 2024
Biosolids
(stabilised
sewage
sludge)
are
the
final
solid
residues
of
wastewater
treatment
process
and
generally
applied
on
agricultural
land
in
many
countries,
including
Australia.
Per-
polyfluoroalkyl
substances
(PFAS)
a
group
synthetic
fluorinated
chemicals
with
ubiquitous
applications
consumer
products
persist
environment.
Globally,
PFAS
have
been
detected
biosolids
considered
source
discharge
to
The
thermal
is
gaining
increasing
interest
water
sector.
Therefore,
viability
techniques
for
safe
destruction
has
received
substantial
research
attention
last
few
years.
Recent
studies
suggest
that
can
be
removed
potentially
destroyed
during
combustive
(such
as
incineration)
non-combustive
treatment,
such
pyrolysis,
gasification,
hydrothermal
carbonisation/liquefaction.
However,
there
limited
understanding
fate
transformation
degradation
across
overall
from
feed
pre-treatment
gas
cleaning
(post-thermal
treatment)
stage.
This
review
consolidates
current
knowledge
transformation,
destruction,
before,
during,
after
biosolids,
covering
lab,
pilot
scale,
industrial
studies.
It
suggested
mechanisms
may
differ
established
pathways
pure
salts,
given
complex
organic
inorganic
matrix
typically
low
concentrations.
Among
all
techniques,
pyrolysis
extensive
investigations
at
different
scales
operation.
temperatures
residence
time
need
sufficiently
optimised
designing
realistic
large-scale
systems
relevant
biosolids'
compositional
peculiarities
destruction.
