Environmental Pollution,
Journal Year:
2024,
Volume and Issue:
364, P. 125315 - 125315
Published: Nov. 20, 2024
To
address
plastic
pollution
in
agricultural
soils
due
to
polyethylene
film
mulch
used,
biodegradable
is
being
studied
as
a
promising
alternative
material
for
sustainable
agriculture.
However,
the
impact
of
and
microplastics
on
soil
carbon
remains
unclear.
The
field
experiment
was
conducted
with
Poly
(butyleneadipate-co-terephthalate)
debris
(PBAT-D,
0.5-2
cm),
low-density
(LDPE-D,
cm)
microplastic
(LDPE-Mi,
500-1000
μm)
contaminated
(0%
(control),
0.05%,
0.1%,
0.2%,
0.5%,
1%
2%
w:w)
planted
soybean,
explore
potential
impacts
respiration
(Rs),
organic
(SOC)
fractions
(microbial
biomass
(MBC),
dissolved
(DOC),
easily
oxidizable
(EOC),
particulate
(POC),
mineral-associated
(MAOC)),
C-enzymes
(β-glucosidase,
β-xylosidase,
cellobiohydrolase).
Results
showed
that
PBAT-D,
LDPE-D
LDPE-Mi
significantly
inhibited
Rs
compared
control
during
flowering
harvesting
stages
(p<0.05).
SOC
increased
PBAT-D
treatments
at
both
stages,
stage,
but
decreased
stage.
In
treatments,
POC
DOC
MAOC
stages.
MBC,
EOC
MBC
while
For
C-enzymes,
no
significant
inhibition
observed
they
were
all
It
concluded
facilitates
sequestration,
which
may
potentially
alter
pool
emissions.
key
significance
this
study
overall
effects
different
forms
dynamics,
inform
future
efforts
farmlands.
Carbon Research,
Journal Year:
2024,
Volume and Issue:
3(1)
Published: April 19, 2024
Abstract
Soil,
as
a
primary
repository
of
plastic
debris,
faces
an
escalating
influx
microplastics.
Microplastics
have
the
potential
to
decrease
soil
bulk
density
and
pH,
well
alter
pore
structure
aggregation.
These
changes
in
physicochemical
properties
subsequently
lead
habitat
degradation
for
microbes
environmental
shifts
that
impact
plant
growth.
Masquerading
carbon
storage,
microplastics
can
distort
assessments
pool
by
introducing
plastic-carbon
associated
leachates,
influencing
organic
matter
(SOM)
turnover
through
priming
effects
(e.g.,
dilution,
substrate
switching,
co-metabolisms).
Additionally,
influence
distribution
particulate
mineral-associated
matter,
consequently
affecting
accumulation
stability
carbon.
Furthermore,
also
chemodiversity
dissolved
(DOM)
soils
increasing
DOM
aromaticity
molecular
weight
while
deepening
its
humification
degree.
The
observed
may
be
attributed
inputs
from
microplastic-derived
along
with
organo-organic
organo-mineral
interactions
coupled
microbial
processes.
Acting
inert
source
carbon,
create
distinct
ecological
niche
growth
contribute
necromass
formation
pathways.
Conventional
reduce
contribution
stable
whereas
bio-microplastics
tend
increase
it.
exert
wide
range
on
performance
both
internal
external
factors,
seed
germination,
vegetative
reproductive
growth,
inducing
ecotoxicity
genotoxicity.
impacts
arise
alterations
environment
or
uptake
plants.
Future
research
should
aim
elucidate
storage
within
fractions,
paying
closer
attention
rhizosphere
dynamics
such
stabilization
mineral
protection
rhizodeposits
soils.
Graphical
Global Change Biology,
Journal Year:
2024,
Volume and Issue:
30(7)
Published: July 1, 2024
Abstract
Microplastic
(MP)
pollution
likely
affects
global
soil
carbon
(C)
dynamics,
yet
it
remains
uncertain
how
and
to
what
extent
MP
influences
respiration.
Here,
we
report
on
a
meta‐analysis
determine
the
effects
of
microbiome
CO
2
emission.
We
found
that
significantly
increased
contents
organic
C
(SOC)
(21%)
dissolved
(DOC)
(12%),
activity
fluorescein
diacetate
hydrolase
(FDAse)
(10%),
microbial
biomass
(17%),
but
led
decrease
in
diversity
(3%).
In
particular,
increases
components
further
promote
emission
(25%)
from
soil,
with
much
higher
effect
MPs
these
emissions
than
biomass.
The
could
be
attributed
opposite
vs.
diversity,
as
accumulation
recruited
some
functionally
important
bacteria
provided
additional
substrates
for
specific
heterotrophic
microorganisms,
while
inhibiting
growth
autotrophic
taxa
(e.g.,
Chloroflexi
,
Cyanobacteria
).
This
study
reveals
can
increase
by
causing
shifts
microbiome.
These
results
underscore
potential
importance
plastic
terrestrial
fluxes,
thus
climate
feedbacks.
Land Degradation and Development,
Journal Year:
2024,
Volume and Issue:
35(15), P. 4379 - 4405
Published: July 22, 2024
Abstract
Microplastics
(MPs)
as
emerging
contaminants
have
a
global
occurrence,
including
both
terrestrial
and
marine
ecosystems.
Soil
enzymes
contribute
to
maintaining
ecosystem
multifunctionality,
for
example,
nutrient
cycling,
organic
material
decomposition,
carbon
climate
regulation.
Our
present
review
highlights
the
impacts
of
MPs
on
soil
enzyme
activities,
influencing
factors,
underlying
mechanisms.
Increasing
findings
confirm
that
can
change
activities
range
involved
in
biogeochemical
cycling
C
N.
However,
current
results
are
highly
controversial.
The
effects
vary
from
significant
nonsignificant
dependent
polymer
type,
biodegradability,
dosage,
size,
shape,
aging
degree
MPs,
exposure
conditions.
Compared
traditional
biodegradable
generally
show
more
pronounced
effects.
via
different
pathways.
On
one
hand,
directly
structure,
leading
alterations
activity.
other
create
unique
habitats,
provide
sources
specific
functional
microbes
producing
enzymes,
release
plastic
additives
pollutants
disturbing
production
these
enzymes.
Furthermore,
alter
physicochemical
biological
properties,
availability
substrates,
plants
fauna,
regulating
their
functions.
In
conclusion,
regulate
pose
profound
impact
multifunctionality.
Aged
micro(nano)plastics
(MNPs)
are
normally
the
ultimate
state
of
plastics
in
environment
after
aging.
The
changes
physical
and
chemical
characteristics
aged
MNPs
significantly
influence
their
environmental
behavior
by
releasing
additives,
forming
byproducts,
adsorbing
contaminants.
However,
a
systematic
review
is
lacking
on
effects
ecological
human
health
regarding
increasing
but
scattered
studies
results.
This
Review
first
summarizes
unique
methods
for
quantifying
aging
degree.
Then
we
focused
potential
impacts
organisms,
ecosystems,
health,
including
"Trojan
horse"
under
real
conditions.
Through
combining
meta-analysis
analytic
hierarchy
process
(AHP)
model,
demonstrated
that,
compared
to
virgin
MNPs,
would
result
biomass
decrease
oxidative
stress
increase
organisms
lead
total
N/P
greenhouse
gas
emissions
ecosystems
while
causing
cell
apoptosis,
antioxidant
system
reaction,
inflammation
health.
Within
framework
risk
assessment,
used
quotient
(RQ)
physiologically
based
pharmacokinetic
(PBK)
models
as
examples
illustrate
importance
considering
degree
data
acquisition,
model
building,
formula
evaluation.
Given
risks
our
urgent
call
more
understand
hazards
real-world
environments.