Journal of Hazardous Materials,
Год журнала:
2024,
Номер
466, С. 133626 - 133626
Опубликована: Янв. 26, 2024
Microplastics
(MPs)
and
Perfluorooctane
sulfonate
(PFOS)
are
two
hard-biodegradable
pollutants
widely
existing
in
the
waste
streams
treated
by
anaerobic
digestion.
However,
their
synergistic
effect
on
methanogenic
metabolism
is
still
unknown.
This
study
investigated
impact
of
polyethylene
terephthalate
(PET)
MPs
alone
co-existing
with
PFOS
CO2
conversion
to
CH4
a
thermophilic
biogas
upgrading
system.
The
results
showed
that
either
PET
addition
or
coexisting
improved
ultimate
percentage
increased
utilization
rate.
When
Fe0
was
added
into
reactors
enhance
interspecies
electron
transfer,
potential
defluorination
observed
rate
15.88
±
1.53%.
Exposure
reactor
300
μg/L
could
change
pathway,
resulting
newly
emerged
Methanomassiliicoccus
dominance
16%.
Furthermore,
under
exposure
PFOS,
number
predicted
genes
regulating
enzymes
steps
from
increased.
These
suggest
co-existence
will
not
inhibit
activity
hydrotrophic
methanogenes,
portion
may
be
biodegraded
during
methanogenesis
regulation.
focused
microplastics
methanogenesis,
(1)
performance
system;
(2)
illustrated
microbial
community's
response
exposure,
role
pathway;
(3)
provided
possible
reactor,
which
mediated
both
Fe0.
In
China,
the
co-landfill
of
stabilized
MSW
incineration
fly
ash
(FA)
and
raw
is
a
historical
legacy
issue,
which
can
affect
stability
heavy
metals
in
FA
stabilization
process
MSW.
This
study
investigates
recirculating
semi-aerobic
co-landfilling
system
FA,
focusing
on
landfill
gas
emissions
metal
leaching.
Three
columns
with
varying
recirculation
frequencies
were
established
for
simulated
experiments.
Results
indicate
that
leachate
enhances
microbial
activity
but
causes
accumulation
NH4+-N
COD,
inhibiting
organic
matter
decomposition.
Recirculation
frequency
does
not
significantly
CO2
production,
peak
concentrations
S1
natural
rainfall,
S2
weekly
recirculation,
S3
bi-daily
at
245
days
being
60.95%,
58.42%,
61.86%,
respectively.
Compared
delayed
exerted
positive
effect
mitigating
Cd
Pb
Heavy
leaching
driven
by
pH
fluctuations,
carbonation,
frequency.
Early
acidic
conditions
increase
release,
while
certain
degree
carbonation
stabilizes
Pb,
Ni,
Cr.
However,
Zn
Cu
mobility
depends
balance
between
acid
carbonation.
contamination
reduces
metabolic
production
altering
communities.
These
findings
highlight
complexity
pollutant
dynamics
offer
insights
optimizing
strategies
to
mitigate
environmental
risks
disposing
