Environmental Science & Technology,
Год журнала:
2024,
Номер
58(45), С. 20235 - 20244
Опубликована: Окт. 31, 2024
Per-
and
polyfluoroalkyl
substances
(PFAS)
are
ubiquitous
environmental
contaminants
that
often
co-occur
with
heavy
metals.
Despite
their
prevalence,
the
mobility
of
PFAS
in
complex,
multicomponent
systems,
particularly
at
molecular
scale,
remains
poorly
understood.
The
vast
diversity
low
concentrations
alongside
anthropogenic
natural
underscore
need
for
integrating
mechanistic
insights
into
sorption
models.
This
study
explores
influence
metal
cations
(Cu(II),
Cd(II),
Fe(II))
on
adsorption
four
common
(PFOA,
PFOS,
PFDA,
GenX)
onto
goethite
(α-FeOOH),
a
iron
(oxyhydr)oxide
both
aquatic
terrestrial
environments.
was
highly
dependent
type,
pH,
ion
concentration,
surface
complexation
model
effectively
predicting
these
interactions.
Cu(II)
Cd(II)
enhanced
PFOS
PFDA
via
ternary
while
slightly
reducing
PFOA
GenX
adsorption.
Under
anoxic
conditions,
Fe(II)
significantly
increased
all
PFAS,
showing
reactivity
greater
than
those
Cd(II).
Additionally,
organic
matter
mobility,
although
groundwater
may
counteract
this
by
enhancing
retention.
These
findings
highlight
key
role
transport
offer
critical
behavior
oxic-anoxic
interfaces.
SAR and QSAR in environmental research,
Год журнала:
2024,
Номер
35(4), С. 309 - 324
Опубликована: Апрель 2, 2024
In
this
study,
we
focus
on
the
development
of
Quantitative
Structure-Property
Relationship
(QSPR)
models
to
predict
critical
micelle
concentration
(CMC)
for
per-
and
polyfluoroalkyl
substances
(PFASs).
Experimental
CMC
values
both
fluorinated
non-fluorinated
compounds
were
meticulously
compiled
from
existing
literature
sources.
Our
approach
involved
constructing
two
distinct
types
based
Support
Vector
Machine
(SVM)
algorithms
applied
dataset.
Type
(I)
trained
exclusively
compounds,
while
(II)
developed
utilizing
entire
dataset,
incorporating
compounds.
Comparative
analyses
conducted
against
reference
data,
as
well
between
model
types.
Encouragingly,
exhibited
robust
predictive
capabilities
demonstrated
high
reliability.
Subsequently,
having
broadest
applicability
domain
was
selected
complement
experimental
thereby
enhancing
our
understanding
PFAS
behaviour.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(15), С. 19594 - 19604
Опубликована: Апрель 8, 2024
Polydimethylsiloxane
(PDMS)
has
been
widely
used
as
a
surface
coating
material,
which
reported
to
possess
dynamic
omniphobicity
wide
range
of
both
polar
and
nonpolar
solvents
due
its
high
segmental
flexibility
mobility.
However,
such
mobility
also
enable
penetration
small
molecules
into
PDMS
coatings,
alter
the
chemical
physical
properties
layers.
To
improve
anti-penetration
PDMS,
series
fluorinated
alkyl
segments
are
grafted
diblock
copolymer
polystyrene-
Applied Sciences,
Год журнала:
2024,
Номер
14(19), С. 8611 - 8611
Опубликована: Сен. 24, 2024
Per-
and
polyfluoroalkyl
substances
(PFAS)
are
diverse
synthetic
chemicals
manufactured
over
seven
decades.
It
is
an
aliphatic
molecule
with
a
basic
hydrophobic
structure
of
carbon
fluorine
linked
to
hydrophilic
end
group.
Due
their
physicochemical
properties
associated
the
unique
structure,
PFAS
has
been
used
in
wide
variety
applications
including
aqueous
film-forming
foams
(AFFF),
paper,
carpets,
non-stick
cookware,
etc.
as
they
make
products
resistant
water,
heat,
stains.
These
molecules
have
drawn
great
attention
recently
for
properties,
high
stability
low
degradability,
so-called
“Forever
Chemicals”.
strongest
carbon-fluorine
bond
which
makes
them
persistent
environment.
Hence
it
contaminates
natural
resources
endangers
public
health.
This
review
discusses
discovery,
development,
evolution
from
wonder
chemical
era
nightmare
era,
exposure
its
impacts
on
human
health
environment,
current
remediation
techniques,
future
trends
related
products.
The
primary
objective
this
identify
knowledge
gaps
contamination,
methods,
possible
alternatives.
Journal of Pharmaceutical and Biomedical Analysis,
Год журнала:
2024,
Номер
246, С. 116203 - 116203
Опубликована: Май 7, 2024
The
ubiquity
of
perfluoroalkyl
substances
has
raised
concerns
about
the
unintended
consequences
PFAS
exposure
on
human
health.
In
present
study,
an
eco-friendly
ultra-performance
liquid
chromatography-tandem
mass
spectrometry
(UPLC-MS/MS)
method
was
developed
for
simultaneous
determination
17
in
serum
and
semen
samples.
QuEChERS
salts
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