Water,
Journal Year:
2024,
Volume and Issue:
16(23), P. 3436 - 3436
Published: Nov. 29, 2024
Per-
and
polyfluoroalkyl
substances
(PFASs)
presented
in
landfill
leachate
can
be
transported
to
groundwater
soil,
posing
risks
human
health
food
water.
However,
the
occurrence
characteristics
of
PFASs
influence
paths
abiotic
biotic
factors
have
not
been
fully
discussed.
Our
study
found
that
detection
rate
samples
was
100%;
ΣPFASs
ranged
from
1328
ng/L
37,447
ng/L;
average
9593
ng/L.
Most
physical
chemical
indexes
showed
a
significant
positive
correlation
with
concentration,
main
including
TOC,
sodium
ion,
chromium
chloride
ion.
Moreover,
dissolved
organic
matter
had
very
important
on
environmental
behavior
PFASs.
The
degree
(DOM)
humification
promoted
transportation
PFBA
PFBS
waste
leachate,
while
microbial
DOM
inhibited
∑13
PFCAs.
microorganisms
were
mainly
Firmicutes,
Campylobacterota
Proteobacteria,
among
which
there
negative
between
indicating
highly
toxic
Proteobacteria
would
inhibit
growth
leachate.
Firmicutes
little
Synergistota,
Halanaerobiaeota,
low
abundance,
both
positively
correlated
various
This
result
may
imply
these
rare
microphyla
are
driving
transformation
Microorganisms
indirectly
affected
PFASs,
by
influencing
Therefore,
affecting
In
summary,
pollution
management
landfills
should
enhanced
regulating
control
Abstract
Our
research
program
characterizes
dissolved
organic
carbon
(DOC)
generated
in
association
with
in‐situ
hydrocarbon
biodegradation.
While
this
DOC
has
been
thought
to
consist
primarily
of
degradation
intermediates,
high‐resolution
mass
spectrometry
(HRMS)
analysis
samples
collected
from
the
USGS's
Bemidji
site
indicates
that
most
chemical
formulae
identified
impacted
wells
are
also
found
unimpacted
water
samples.
We
recently
proposed
consists
microbial
products
as
a
result
de
novo
synthesis
by
organisms
growing
on
supplied
oil
and
is
chemically
consistent
naturally
occurring
DOC.
In
note,
we
further
evaluated
our
HRMS
results
focusing
two
electrochemical
characteristics:
identification
potential
redox
pairs
distribution
average
oxidation
state
HRMS‐identified
formulae.
hypothesize
microbially
produced
acts
pool
compounds
continuum
states
serves
reversible
electron
buffer
ability
accept,
store,
donate
electrons
depending
conditions.
This
allows
disconnected
time
space
reduction
terminal
acceptors
(TEAs),
such
oxygen,
Fe
3+
,
or
sulfate.
Given
concentrations
may
be
high
relative
hydrocarbons
TEAs,
it
suggests
missing
link
understanding
balance
at
sites
undergoing
natural
attenuation.
Little
is
known
about
the
electron
shuttle
ability
of
dissolved
organic
matter
(DOM)
and
its
effects
on
arsenic
(As)
mobilization,
which
makes
underlying
mechanism
groundwater
As
enrichment
elusive.
In
this
study,
both
electrochemical
properties
molecular
compositions
DOM
in
high
were
quantified
Hetao
Basin,
China.
We
found
that,
along
flow
path,
average
electron-transferring
capacity
(ETC)
DOM,
including
capacities
electron-accepting
electron-donating,
continuously
increased
from
2.85
to
3.59
mmole-/gC
with
concentrations.
The
increasing
ETC
reflected
an
increase
DOM.
Furthermore,
was
mainly
attributed
recalcitrant
compounds
especially
CHOS
CHONS
formulas
highly
unsaturated
structures
oxygen
(HUSHO)
CHO
CHON
aromatic
(AS).
significantly
positive
correlation
between
concentration
indicated
that
promoted
through
shuttling
for
inducing
reductive
dissolution
As-containing
Fe(III)
oxide
minerals,
further
supported
by
our
culture
experiments
showing
goethite
more
reduced
[133
μM
Fe(II)]
presence
a
higher
(3.35
mmole-/gC)
as
than
[65.2
relatively
lower
(2.41
mmole-/gC).
Our
study
highlights
AS
have
ability,
promoting
groundwater.
