Water Biology and Security,
Journal Year:
2023,
Volume and Issue:
3(1), P. 100233 - 100233
Published: Dec. 2, 2023
Micro(nano)plastics
(MNPs)
are
a
growing
problem
as
persistent
environmental
pollutants.
Here,
we
investigated
the
impact
of
MNPs
on
microorganisms
in
aquatic
microbial
floc
exposed
to
NPs
(80
nm)
and
MPs
(8
μm)
for
35
days.
Water
quality
indicators
were
tested
weekly
microbiological
analyses
conducted
days
7
28
after
exposure.
The
results
showed
that
there
significant
differences
levels
total
ammonia
nitrogen
or
nitrite
between
groups
control
group,
spanning
from
day
28.
For
response,
community
richness
significantly
increased
at
7.
Functional
prediction
relative
abundances
bacteria
associated
with
"Forms
Biofilms",
"Potentially
Pathogenic",
"Plastic
Degradation"
cycle
processes
different
suggest
had
no
effect
diversity
mature
flocs.
Findings
could
cause
an
increase
abundance
potentially
pathogenic
bacteria,
while
do
not.
In
addition,
stress
affected
microorganisms,
exerted
greater
impacts
than
MPs.
this
study
further
our
understanding
environmentally
relevant
concentrations
ecosystems.
Ecotoxicology and Environmental Safety,
Journal Year:
2024,
Volume and Issue:
271, P. 115974 - 115974
Published: Jan. 24, 2024
Biodegradable
plastics
(BPs)
are
widely
used
as
alternatives
to
non-BPs
due
their
inherent
ability
undergo
facile
degradation.
However,
the
ecotoxicological
impact
of
biodegradable
microplastics
(MPs)
rarely
remains
scientific
documented
especially
aquatic
ecosystem
and
organisms
compared
conventional
microplastics.
Therefore,
this
study
aimed
investigate
ecotoxicity
polylactic
acid
(PLA)
MPs
Daphnia
magna
with
that
polyethylene
(PE)
without
ultraviolet
(UV)
treatment
(4
weeks).
The
acute
toxicity
(48
h)
PLA
was
significantly
higher
than
PE
MPs,
potentially
attributable
elevated
bioconcentration
resulting
from
density.
UV
notably
reduced
particle
size
induced
new
hydrophilic
functional
groups
containing
oxygen.
Thus,
lethal
exhibited
noteworthy
increase,
before
after
treatment,
which
greater
UV-PE
MPs.
In
addition,
UV-PLA
showed
markedly
reactive
oxygen
species
concentration
in
D.
positive
control.
there
no
significant
increase
level
lipid
peroxidation,
possibly
successful
defense
by
antioxidant
enzymes
(superoxide
dismutase
catalase).
These
findings
highlight
risks
organisms,
require
comprehensive
long-term
studies.
Archives of Microbiology,
Journal Year:
2024,
Volume and Issue:
206(5)
Published: April 30, 2024
Abstract
Nanoplastics
pose
significant
environmental
problems
due
to
their
high
mobility
and
increased
toxicity.
These
particles
can
cause
infertility
inflammation
in
aquatic
organisms,
disrupt
microbial
signaling
act
as
pollutants
carrier.
Despite
extensive
studies
on
harmful
impact
living
the
degradation
of
nanoplastics
is
still
under
research.
This
study
investigated
by
isolating
bacteria
from
gut
microbiome
Tenebrio
molitor
larvae
fed
various
plastic
diets.
Five
bacterial
strains
capable
degrading
polystyrene
were
identified,
with
Achromobacter
xylosoxidans
M9
showing
nanoplastic
abilities.
Within
6
days,
this
strain
reduced
particle
size
92.3%,
confirmed
SEM
TEM
analyses,
altered
chemical
composition
nanoplastics,
indicating
a
potential
for
enhanced
bioremediation
strategies.
The
also
caused
7%
weight
loss
film
over
30
demonstrating
its
efficiency
faster
than
film.
findings
might
enhance
Graphical
abstract
