Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(14), P. 5782 - 5793
Published: March 29, 2023
The
placenta
is
pivotal
for
fetal
development
and
maternal–fetal
transfer
of
many
substances,
including
per-
polyfluoroalkyl
substances
(PFASs).
However,
the
intraplacental
distribution
PFASs
their
effects
on
placental
vascular
function
remain
unclear.
In
this
study,
302
tetrads
matched
subchorionic
(fetal-side),
parabasal
(maternal-side),
cord
serum,
maternal
serum
samples
were
collected
from
Guangzhou,
China.
Eighteen
emerging
legacy
five
biomarkers
measured.
Results
showed
that
higher
levels
perfluorooctanoic
(PFOA),
perfluorooctane
sulfonic
acid
(PFOS),
chlorinated
polyfluorinated
ether
acids
(Cl-PFESAs)
detected
in
compared
to
placenta.
There
significant
associations
placenta,
but
not
with
(up
32.5%)
lower
birth
size.
Birth
weight
was
negatively
associated
PFOA
(β:
−103.8,
95%
CI:
−186.3
−21.32)
6:2
Cl-PFESA
−80.04,
−139.5
−20.61),
primarily
Mediation
altered
angiopoietin-2
endothelial
growth
factor
receptor-2
evidenced
adverse
outcomes
PFOS
8:2
Cl-PFESA,
explaining
9.5%–32.5%
total
effect.
To
best
our
knowledge,
study
first
report
differential
mediating
provides
novel
insights
into
plate-specific
measurement
PFAS-associated
health
risk
assessment.
Journal of Hazardous Materials,
Journal Year:
2024,
Volume and Issue:
466, P. 133637 - 133637
Published: Jan. 29, 2024
Addressing
per-and
polyfluoroalkyl
substances
(PFAS)
contamination
is
an
urgent
environmental
concern.
While
most
research
has
focused
on
PFAS
in
water
matrices,
comparatively
little
attention
been
given
to
sludge,
a
significant
by-product
of
wastewater
treatment.
This
critical
review
presents
the
latest
information
emission
sources,
global
distribution,
international
regulations,
analytical
methods,
and
remediation
technologies
for
sludge
biosolids
from
treatment
plants.
concentrations
matrices
are
typically
hundreds
ng/g
dry
weight
(dw)
developed
countries
but
rarely
reported
developing
least-developed
due
limited
capability.
In
comparison
samples,
efficient
extraction
cleaning
procedures
crucial
detection
samples.
regulations
have
mainly
soil
reuse,
only
two
set
limits
or
with
maximum
100
dw
major
PFAS.
Biological
using
microbes
enzymes
present
considered
as
having
high
potential
remediation,
they
eco-friendly,
low-cost,
promising.
By
contrast,
physical/chemical
methods
either
energy-intensive
linked
further
challenges
disposal.
The
findings
this
deepen
our
comprehension
guided
future
recommendations.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(8), P. 2712 - 2724
Published: Jan. 1, 2024
Frustrated
Lewis
pair
(FLP)
bond
activation
chemistry
has
greatly
developed
over
the
last
two
decades
since
seminal
report
of
metal-free
reversible
hydrogen
activation.
Recently,
FLP
systems
have
been
utilized
to
allow
monoselective
C-F
(at
equivalent
sites)
in
polyfluoroalkanes.
The
problem
'over-defluorination'
functionalization
polyfluoroalkanes
(where
multiple
fluoro-positions
are
uncontrollably
functionalized)
a
long-standing
chemical
fluorocarbon
for
80
years.
mediated
is
complementary
other
solutions
address
and
offers
several
advantages
unique
opportunities.
This
perspective
highlights
some
these
opportunities
places
development
into
context
wider
effort
overcome
'over-defluorination'.
Chemical Engineering Journal,
Journal Year:
2022,
Volume and Issue:
452, P. 139202 - 139202
Published: Sept. 16, 2022
Per-
and
polyfluoroalkyl
substances
(PFAS)
are
a
class
of
toxic
bioaccumulative
compounds
affecting
environmental
human
health.
Conventional
wastewater
treatment
processes
ineffective
at
remediating
these
persistent
chemicals.
While
functional
framework
materials
have
been
shown
to
remove
PFAS
via
adsorption
catalytic
degradation,
there
is
an
on-going
debate
about
their
practical
use
in
water
purification.
Inspired
by
recent
research
on
typical
materials,
including
zeolites,
metal-organic
frameworks
(MOFs),
covalent
organic
(COFs),
our
review
summarizes
the
principles
design,
properties,
applications
with
special
emphasis
removal.
The
potential
material
for
degradation
constructively
discussed,
based
limited
studies
thus
far.
Finally,
challenges
using
degrade
presented
along
sustainable
design
prospects
improve
technology.
current
provides
new
insights
advancing
elimination
from
contaminated
waters.
