Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: July 26, 2023
Abstract
GenX
(hexafluoropropylene
oxide
dimer
acid)
belongs
to
the
group
of
per-
and
poly-fluoroalkyl
substance
(PFAS)
compounds
introduced
replace
perfluorooctanoic
acid
(PFOA),
which
has
been
phased
out
in
industrial
consumer
product
formulations.
While
investigated
lab
animals,
there
is
limited
information
available
regarding
its
uptake
translocation
wheat
rice.
This
study
reports
on
a
greenhouse
experiment
rice
grown
under
flooded
non-flooded
conditions
were
exposed
two
concentrations
soil
(0.4
mg
kg
−
1
2
).
was
analysed
soil,
porewater
shoots
using
targeted
liquid
chromatography-tandem
mass
spectroscopy
(LC-MS/MS)
analysis.
Extractable
organic
fluorine
(EOF)
determined
high-resolution
continuum
source
graphite
furnace
molecular
absorption
spectrometry
(HR
GFMAS).
Results
showed
that
different
species
took
up
amounts
GenX.
The
found
be
2.34
(±
0.45)
µg
g
4.11
0.87)
conditions,
respectively,
at
low
exposure
level.
At
high
exposure,
increased
threefold
10.4
0.41)
13.4
0.72)
,
respectively.
Wheat
similar
increases
between
low-
high-level
exposure.
factor
significantly
higher
(
P
=
0.013)
compared
bioaccumulation
behaviours
same
culture
(e.g.
temperature,
humidity,
light,
concentration
soil)
<
0.001).
Non-flooded
plants
displayed
level
than
ones.
Following
GenX,
reduction
biomass
(25%)
control
0.014).
Our
findings
indicate
bioaccumulative
compound,
presence
likely
inhibits
growth
plants.
The
escalating
concern
of
perfluoroalkyl
and
polyfluoroalkyl
substances
(PFAS),
particularly
at
contaminated
sites,
has
prompted
extensive
investigations.
In
this
study,
samples
multimedia
including
air,
rhizosphere
soil,
tissues
wheat
various
growing
stages
were
collected
near
a
mega
fluorochemical
industrial
park
in
China.
Perfluorooctanoic
acid
(PFOA)
was
predominant
both
air
soil
with
strong
correlation,
highlighting
deposition
as
an
important
source
the
terrestrial
system.
PFAS
concentrations
decreased
stem
ear
but
increased
leaves
matured.
Specifically,
perfluorobutanoic
(PFBA)
dominated
aboveground
full-life-cycle,
except
that
PFOA
surpassed
became
during
filling
maturing
stages,
hinting
airborne
source.
For
all
PFAS,
bioaccumulation
factors
translocation
(TFs)
inversely
correlated
carbon
chain
length
full-life-cycle.
obtained
TF
values
considerably
higher
than
those
from
ambient
sites
reported
previously,
further
suggesting
unneglectable
foliar
uptake
which
estimated
to
be
25%
for
PFOA.
Moreover,
spray
irrigation
remarkably
enhanced
absorption
via
relative
flood
irrigation.
daily
intake
PFBA
consumption
inhalation
0.50
μg/kg/day
local
residents,
least
one
magnitude
corresponding
threshold,
alarmingly
high
exposure
risk.
Environmental Science and Pollution Research,
Journal Year:
2023,
Volume and Issue:
31(1), P. 1607 - 1620
Published: Dec. 4, 2023
GenX
(hexafluoropropylene
oxide
dimer
acid)
belongs
to
the
group
of
per-
and
poly-fluoroalkyl
substance
(PFAS)
compounds
introduced
replace
perfluorooctanoic
acid
(PFOA),
which
has
been
phased
out
in
industrial
consumer
product
formulations.
While
investigated
lab
animals,
there
is
limited
information
available
regarding
its
uptake
translocation
wheat
rice.
This
study
reports
on
a
greenhouse
experiment
rice
grown
under
flooded
non-flooded
conditions
were
exposed
two
concentrations
soil
(0.4
mg
kg
Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: July 26, 2023
Abstract
GenX
(hexafluoropropylene
oxide
dimer
acid)
belongs
to
the
group
of
per-
and
poly-fluoroalkyl
substance
(PFAS)
compounds
introduced
replace
perfluorooctanoic
acid
(PFOA),
which
has
been
phased
out
in
industrial
consumer
product
formulations.
While
investigated
lab
animals,
there
is
limited
information
available
regarding
its
uptake
translocation
wheat
rice.
This
study
reports
on
a
greenhouse
experiment
rice
grown
under
flooded
non-flooded
conditions
were
exposed
two
concentrations
soil
(0.4
mg
kg
−
1
2
).
was
analysed
soil,
porewater
shoots
using
targeted
liquid
chromatography-tandem
mass
spectroscopy
(LC-MS/MS)
analysis.
Extractable
organic
fluorine
(EOF)
determined
high-resolution
continuum
source
graphite
furnace
molecular
absorption
spectrometry
(HR
GFMAS).
Results
showed
that
different
species
took
up
amounts
GenX.
The
found
be
2.34
(±
0.45)
µg
g
4.11
0.87)
conditions,
respectively,
at
low
exposure
level.
At
high
exposure,
increased
threefold
10.4
0.41)
13.4
0.72)
,
respectively.
Wheat
similar
increases
between
low-
high-level
exposure.
factor
significantly
higher
(
P
=
0.013)
compared
bioaccumulation
behaviours
same
culture
(e.g.
temperature,
humidity,
light,
concentration
soil)
<
0.001).
Non-flooded
plants
displayed
level
than
ones.
Following
GenX,
reduction
biomass
(25%)
control
0.014).
Our
findings
indicate
bioaccumulative
compound,
presence
likely
inhibits
growth
plants.
