The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
931, P. 172975 - 172975
Published: May 3, 2024
Nowadays,
animal
manure
composting
constitutes
a
sustainable
alternative
for
farmers
to
enhance
the
level
of
nutrients
within
soils
and
achieve
good
productivity.
However,
pollutants
may
be
present
in
manures.
This
study
focuses
on
detection
environmental
microplastics
(EMPs)
into
composts,
as
well
assessment
their
potential
toxicity
earthworm
Eisenia
andrei.
To
these
aims,
animals
were
exposed
two
types
compost,
namely
bovine
(cow)
ovine
(sheep)
manure,
besides
mixture,
7
14
days.
The
presence
characterization
EMPs
was
evaluated
all
tested
tissues
earthworms.
impact
composts
assessed
by
multi-biomarker
approach
including
cytotoxic
(lysosomal
membrane
stability,
LMS),
genotoxic
(micronuclei
frequency,
MNi),
biochemical
(activity
catalase,
CAT,
glutathione-S-transferase,
GST;
content
malondialdehyde,
MDA),
neurotoxic
acetylcholinesterase,
AChE)
responses
Results
indicated
high
levels
especially
sheep
(2273.14
±
200.89
items/kg)
comparison
cow
(1628.82
175.23
items/kg),
with
size
<1.22
μm
most
abundant
EMPs.
A
time-dependent
decrease
LMS
AChE
noted
earthworms,
concomitant
increase
DNA
damages
(MNi)
after
days
exposure.
Also,
severe
oxidative
stress
recorded
treated
different
compost
through
an
CAT
GST
activities,
LPO
levels,
Therefore,
it
is
necessary
carefully
consider
findings
agricultural
practices
terms
plastic
mitigation
usage,
order
prevent
any
risk
environment
health.
Journal of Environmental Management,
Journal Year:
2025,
Volume and Issue:
375, P. 124359 - 124359
Published: Feb. 1, 2025
The
extensive
use
and
application
of
recycled
organics,
including
biosolids
compost,
has
been
considered
as
an
effective
waste
management
approach
to
reduce
landfills.
However,
concerns
have
raised
about
the
presence
microplastics
(MPs)
in
these
organics
their
subsequent
transfer
soils.
Although
MPs
widely
documented,
our
knowledge
occurrence
characteristics
processed
organic
such
compost
is
still
limited.
present
study
aimed
investigate
abundance,
potential
sources
(>25
μm)
samples
collected
across
eleven
sites
with
different
processing
systems
Australia.
This
includes
digestate
from
anaerobic
digestion
rapidly
dehydrated
food
waste.
MPs,
mainly
polyethylene,
polypropylene
polyester,
were
found
all
concentrations
ranging
1500
16,000
MP/kg
dry
weight.
majority
fell
within
smaller
size
range
25-500
μm.
Using
concentration
(size
range,
morphology,
density)
detected
mass
abundance
was
estimated
be
between
7
760
mg/kg
We
also
that
5.2
×
1010
6.2
1012
MP/year
could
transferred
land
via
findings
this
showed
compostable
bags
a
source
some
samples.
provides
first
evidence
Australia
emphasises
need
more
comprehensively
understand
fate
during
composting
processes,
contribution
soil
MP
contamination,
impacts
on
biota.
