Journal of Environmental Analysis Health and Toxicology,
Journal Year:
2024,
Volume and Issue:
27(1), P. 29 - 38
Published: March 26, 2024
The
aim
of
this
study
was
to
determine
the
concentrations
24
perfluoroalkyl
and
polyfluoroalkyl
substances
(PFAS)
in
South
Han
River
assess
human
health
risks
exposure
PFAS
through
ingestion
water
same
river.
Surface
samples
were
collected
March,
June,
September,
December,
2023
at
seven
sampling
sites
Ten
(PFBA,
PFPeA,
PFHxA,
PFHpA,
PFOA,
PFMPA,
PFMBA,
PFBS,
PFOS,
GenX)
detected
PFBA,
PFPeA
predominant.
highest
concentration
level
river
found
S1
site,
its
total
ranged
from
691
1,021
ng/L.
hazard
quotient
values
four
(i.e.,
did
not
exceed
one-tenth
World
Health
Organization’s
acceptable
level.
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: Feb. 15, 2025
This
study,
one
of
the
few
conducted
to
date
on
working
farms
in
US,
examined
per-
and
polyfluoroalkyl
substances
(PFAS)
contamination
10
treated
with
biosolids
using
a
paired
control-treatment
approach.
Biosolids
are
nutrient-rich
inexpensive
soil
amendments,
however,
if
contain
PFAS
which
known
be
toxic,
mobile
bioaccumulate,
they
can
leave
lasting
negative
impacts
farming
water.
Our
study
showed
significantly
higher
concentrations
biosolids-treated
(treatment)
soils
compared
(untreated)
controls.
Soil
depth,
physicochemical
properties
(e.g.,
organic
matter
pH),
sources
affected
types
soils.
While
precursors
were
present
biosolids,
absent
soils,
likely
due
biotransformation
terminal
perfluoroalkyl
products.
The
detection
shorter-chain
surface
water
highlights
their
greater
mobility,
raising
concerns
beyond
boundaries
farms.
Chemosphere,
Journal Year:
2025,
Volume and Issue:
374, P. 144186 - 144186
Published: Feb. 16, 2025
Per-
and
polyfluoroalkyl
substances
(PFAS),
as
emerging
bioaccumulative
contaminants,
are
widely
present
in
water
wastewater
systems.
Municipal
effluents
serve
pathways
for
PFAS
to
enter
aquatic
environments.
This
study
monitors
the
treatment
lagoons,
nearby
wetlands
bay
a
Canadian
Arctic
community.
Eight
out
of
40
targeted
were
detected
samples
collected
from
raw
wastewater,
natural
wetlands,
Ungava
bay.
The
total
concentrations
ranges
45.9-56.1
ng/L
36.6-70.8
measured
at
7.3
most
prevalent
frequently
6:2
FTS,
PFHxA,
PFNA.
At
all
sites,
short-chain
surpassed
long-chain
PFAS.
Short-chain
peaked
267.01
(79.74%),
while
totaled
67.83
(20.26%).
estimated
yearly
mass
flow
rate
into
environment
through
lagoon
effluent
was
2.33
g/year.
conducted
environmental
risk
assessment
both
lagoons
three
downstream
suggests
that
risks
associated
with
under
posed
minimal
ecological
risk,
though
long-term
evaluation
is
needed.
In
conclusion,
findings
this
research
provide
further
information
on
pollution
regions
may,
such,
guide
development
comprehensive
regulations
safeguard
human
health
environment,
thereby
mitigating
potential
future
risks.
Environmental Science & Technology Letters,
Journal Year:
2024,
Volume and Issue:
11(4), P. 301 - 307
Published: March 21, 2024
Per-
and
polyfluoroalkyl
substances
(PFAS)
are
ubiquitously
detected
in
the
environment,
raising
concerns
about
human
exposure.
The
assessment
of
individual
exposure
to
PFAS
has
been
limited
due
lack
specialized
sampling
tools.
Personal
wearable
samplers,
including
silicone
wristbands,
have
used
for
assessment.
However,
translating
data
into
challenging
chemical
rates
by
those
samplers.
We
developed
evaluated
a
personal
air
sampler
(PAWS)
using
sorbent-impregnated
polyurethane
foam
its
ability
capture
diverse
PFAS.
Simultaneously,
we
deployed
wristbands
comparison.
Our
results
showed
that
PAWS
effectively
captured
both
ionic
neutral
PFAS,
while
had
relatively
capacity
perfluorocarboxylic
acids
(PFCAs).
observations
suggest
may
collect
phosphoric
acid
diesters
(diPAPs)
through
dermal
contact,
although
further
investigation
is
necessary.
concentrations
can
be
converted
previously
established
rates,
facilitating
quantitative
inhalation
Smoking
status
was
found
associated
with
high
diPAP
levels
validation
needed.
promising
technology
application
structurally
chemicals.
Journal of Applied Toxicology,
Journal Year:
2024,
Volume and Issue:
44(7), P. 1040 - 1049
Published: March 26, 2024
Abstract
As
part
of
the
US
Environmental
Protection
Agency's
perfluoroalkyl
and
polyfluoroalkyl
substances
(PFAS)
Action
Plan,
agency
is
committed
to
increasing
our
understanding
potential
ecological
effects
PFAS.
The
objective
these
studies
was
examine
developmental
toxicity
PFAS
using
laboratory
model
amphibian
species
Xenopus
laevis
.
We
had
two
primary
aims:
(1)
understand
a
structurally
diverse
set
compounds
in
developing
embryos
(2)
characterize
impacts
perfluorooctanesulfonic
acid
(PFOS),
perfluorohexanesulfonic
(PFHxS),
perfluorooctanoic
(PFOA),
hexafluoropropylene
oxide‐dimer
(HFPO‐DA
a.k.a.
GenX),
on
growth
thyroid
hormone‐controlled
metamorphosis.
employed
combination
static
renewal
flow‐through
exposure
designs.
Embryos
were
exposed
17
starting
at
midblastula
stage
through
completion
organogenesis
(96
h).
To
investigate
PFOS,
PFOA,
PFHxS,
HFPO‐DA
development
metamorphosis,
larvae
from
premetamorphosis
(Nieuwkoop
Faber
51
or
54)
pro
Of
tested
embryos,
only
1H,1H,10H,10H‐perfluorodecane‐1,10‐diol
(FC10‐diol)
perfluorohexanesulfonamide
(FHxSA)
resulted
clear
concentration‐dependent
toxicity.
For
both
PFAS,
significant
increase
mortality
observed
2.5
5
mg/L.
FC10‐diol,
100%
surviving
malformed
1.25
mg/L,
while
for
FHxSA,
malformations
(100%)
Developmental
achieved
most
sensitive
endpoint
with
0.625
mg/L
FC10‐diol
respectively.
In
larval
studies,
we
following
PFHxS
PFOS
concentrations
100
respectively,
no
when
PFOA
concentration
Further,
did
not
observe
endpoints
larvae.
These
experiments
have
broadened
impact
anuran
development.
