Environmental Science & Technology,
Год журнала:
2024,
Номер
58(19), С. 8464 - 8479
Опубликована: Май 3, 2024
Microplastics
threaten
soil
ecosystems,
strongly
influencing
carbon
(C)
and
nitrogen
(N)
contents.
Interactions
between
microplastic
properties
climatic
edaphic
factors
are
poorly
understood.
We
conducted
a
meta-analysis
to
assess
the
interactive
effects
of
(type,
shape,
size,
content),
native
(texture,
pH,
dissolved
organic
(DOC))
(precipitation
temperature)
on
C
N
contents
in
soil.
found
that
low-density
polyethylene
reduced
total
(TN)
content,
whereas
biodegradable
polylactic
acid
led
decrease
(SOC).
Microplastic
fragments
especially
depleted
TN,
reducing
aggregate
stability,
increasing
N-mineralization
leaching,
consequently
C/N
ratio.
size
affected
outcomes;
those
<200
μm
both
TN
SOC
Mineralization-induced
nutrient
losses
were
greatest
at
1
2.5%
weight.
Sandy
soils
suffered
highest
contamination-induced
depletion.
Alkaline
showed
depletion,
suggesting
high
degradability.
In
low-DOC
soils,
contamination
caused
2-fold
greater
depletion
than
with
DOC.
Sites
precipitation
temperature
had
conclusion,
there
complex
interactions
determining
impacts
health.
always
risks
but
severity
depends
characteristics,
properties,
conditions,
potential
exacerbation
by
greenhouse
emission-induced
climate
change.
Journal of Hazardous Materials Advances,
Год журнала:
2022,
Номер
6, С. 100077 - 100077
Опубликована: Апрель 21, 2022
Particulate
plastic
fragments
(micro
and
nano-plastics)
in
aquatic
environments
provide
abundant
solid
substrates,
which
serve
as
an
important
habitat
for
a
variety
of
microorganisms.
Surfaces
microplastics
(MPs)
exhibit
hydrophobicity
that
facilitate
the
adsorption
dissolved
organic
carbon
(DOC)
environment.
Furthermore,
MPs
act
substrata,
well
source
including
readily
bioavailable
DOC,
promote
formation
microbial
biofilms.
These
biofilms
have
varied
metabolic
actions
govern
subsequent
succession
micro-
meso-organisms
habitation
MPs.
The
assemblage
ecosystems
colonising
environment
is
often
referred
to
“plastisphere”.
Polymer
type,
environmental
conditions,
nutrient
status,
salinity,
season,
affect
composition
biofilm.
Microbial
accelerated
by
biofilm
on
particulate
plastics
enables
movement
microorganisms,
especially
environment,
impacts
transport
toxicity
contaminants
associated
with
these
fragments.
This
review
paper
describes
processes
formation,
factors
affecting
implications
mobility
degradation
MPs,
bioavailability
Environmental Science & Technology,
Год журнала:
2022,
Номер
56(22), С. 15746 - 15759
Опубликована: Окт. 27, 2022
Biodegradable
polymers
are
promoted
as
promising
alternatives
for
conventional
non-degradable
plastics,
but
they
may
also
negatively
impact
soil
ecosystems.
Here,
we
estimated
the
effects
of
biodegradable
(polylactide
(PLA)
and
polybutylene
succinate
(PBS))
non-biodegradable
(polyethylene
(PE)
polystyrene
(PS))
microplastics
at
a
concentration
1%
(w/w)
on
dissolved
organic
matter
(DOM)
in
two
types,
black
(BS)
yellow
(YS),
by
using
fluorescence
excitation-emission
matrix
spectroscopy
ultrahigh-resolution
Fourier
transform
ion
cyclotron
resonance
mass
spectrometry
(FT-ICR-MS).
PBS
significantly
increased
contents
carbon
(DOC)
relative
intensities
protein-like
components.
The
turnover
rates
DOM
were
statistically
higher
treatments
(0.106
0.196,
p
<
0.001)
than
those
other
microplastic
groups.
FT-ICR-MS
results
indicated
that
more
labile-active
molecules
preferentially
obtained
treatments,
which
be
attributed
to
polymer
degradation.
showed
no
significant
optical
characteristics
changed
molecular
compositions
DOM.
More
labile
observed
BS
samples
treated
with
PE
compared
control,
while
decreased
lability
YS
soil.
distinct
priming
plastic-leached
trigger
changes
different
soils.
This
study
provided
important
information
further
understanding
processes.
Frontiers in Environmental Science,
Год журнала:
2022,
Номер
10
Опубликована: Март 9, 2022
Microplastics
are
<5
mm
in
size,
made
up
of
diverse
chemical
components,
and
come
from
multiple
sources.
Due
to
extensive
use
unreasonable
disposal
plastics,
microplastics
have
become
a
global
environmental
issue
aroused
widespread
concern
about
their
potential
ecological
risks.
This
review
introduces
the
sources,
distribution
migration
agricultural
soil
ecosystems.
The
effects
on
physicochemical
properties
nutrient
cycling
also
discussed.
can
alter
series
key
biogeochemical
processes
by
changing
characteristics,
resulting
activities
functions
microorganisms.
animals
plants,
combined
coexisting
pollutants
(organic
heavy
metals),
risks
human
health
Finally,
prevention
control
strategies
microplastic
pollution
ecosystems
put
forward,
knowledge
gaps
future
research
suggestions
given.
improves
understanding
behavior
ecosystems,
provides
theoretical
reference
for
better
assessment
microplastics.
