The
ability
of
microplastics
(MPs)
to
interact
with
environmental
pollutants
is
currently
great
concern
due
the
increasing
use
plastic
and
poor
degradation
wastes.
Agricultural
soils
are
sinks
for
multi-pollutants
safety
biodegradable
MPs
in
field
conditions
questioned.
In
this
work,
we
tested
effect
on
soil
plant
parameters
two
common
abundant
MPs,
conventional
non-degradable
low-density
polyethylene
(LDPE)
polymer
polylactic
acid
(PLA)
at
different
sizes
(<
250
μm
250-300
μm)
association
arsenic
(As).
Lettuce
(Lactuca
sativa
L.)
was
used
as
model
a
small-scale
experiment
lasting
60
days.
Microplastics
As
explained
12%
47%
total
variance,
respectively,
while
their
interaction
21%,
suggesting
higher
toxic
impact
than
MPs.
generally
promoted
growth,
did
not
affect
nutrient
concentrations
roots,
modify
or
increased
nutrients
leaves
enzymes
activities.
However,
enzyme
activities
variable
depending
time
exposure
(with
larger
effects
immediately
after
exposure),
type
size
co-application
amount
bioavailable
short
medium
term,
activities,
whereas
reduced
growth
concentration
roots.
Thus,
determined
toxicity.
mechanisms
synergist
toxicity
need
further
investigation,
especially
long-term
experiments.
Global Change Biology,
Год журнала:
2024,
Номер
30(7)
Опубликована: Июль 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.
The Science of The Total Environment,
Год журнала:
2023,
Номер
912, С. 169058 - 169058
Опубликована: Дек. 8, 2023
The
ability
of
microplastics
(MPs)
to
interact
with
environmental
pollutants
is
currently
great
concern
due
the
increasing
use
plastic.
Agricultural
soils
are
sinks
for
multipollutants
and
safety
biodegradable
MPs
in
field
conditions
questioned.
However,
still
few
studies
have
investigated
interactive
effects
between
metals
on
soil-plant
system
agricultural
soil
testing
crops
human
consumption.
In
this
work,
we
tested
effect
plant
parameters
two
common
MPs,
non-degradable
plastic
low-density
polyethylene
polymer
polylactic
acid
at
different
sizes
(<250
μm
250–300
μm)
association
arsenic
(As).
Lettuce
(Lactuca
sativa
L.)
was
used
as
a
model
small-scale
experiment
lasting
60
days.
Microplastics
As
explained
12
%
47
total
variance,
respectively,
while
their
interaction
21
%,
suggesting
higher
toxic
impact
than
MPs.
Plant
growth
promoted
by
alone,
especially
when
were
added
(+22
%).
did
not
affect
nutrient
concentrations
roots
leaves.
enzyme
activities
variable
depending
time
exposure
(with
larger
immediately
after
exposure),
type
size
On
contrary,
co-application
MP
As,
although
it
change
amount
bioavailable
short
medium
term,
resulted
significant
decrease
lettuce
biomass
(−19
%)
root
concentrations,
applied.
Generally,
determined
plant-soil
toxicity.
This
work
provides
insights
into
risk
copollution
its
phytotoxic
crops.
mechanisms
joint
toxicity
need
further
investigation,
under
long-term
experiments.
Land Degradation and Development,
Год журнала:
2024,
Номер
35(15), С. 4379 - 4405
Опубликована: Июль 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.
