International Journal of Environmental Research and Public Health,
Год журнала:
2023,
Номер
20(4), С. 3617 - 3617
Опубликована: Фев. 17, 2023
Microplastics
in
freshwater
environments
pose
a
serious
threat
to
living
beings.
Polyethylene
microplastics
(PE-MP)
are
the
type
most
used
around
world
as
microbeads
personal
care
products,
and
they
have
been
found
aquatic
organisms.
The
behavior
toxicity
of
fluorescent
PE-MP
spheres
with
an
average
diameter
58.9
μm
were
studied
adult,
juvenile
embryo
zebrafish
(Danio
rerio).
adults
for
genotoxicity,
cytotoxicity,
histology
biochemical
markers.
Juveniles
underwent
follow-up
gastrointestinal
(GI)
tract
histologic
observations,
embryos
embryotoxicity
FET-test.
In
adults,
micronucleus
test
comet
assays
neither
genotoxicity
after
acute
exposure
96
h
at
concentrations
0.0,
12.5,
50
100
mg.L−1,
nor
cytotoxicity
through
nuclear
abnormalities
test.
Acetylcholinesterase
(AChE),
Glutathione-S-Transferase
(GST)
Lactate
Dehydrogenase
(LDH)
activities
measured
exposed
h.
AChE
GST
significantly
changed,
while
no
changes
occurred
LDH.
conclusion,
these
did
not
cause
toxic
effects
because
there
was
internalization.
observed
may
be
associated
GI
microbiological
dysbiosis,
previously
reported.
intestine
juveniles
remained
present
12–15
days
on
post-exposure
clearance
study,
showing
slow
depuration.
histological
analysis,
internalization
microbeads,
complete
cross
chorion
barrier,
embryotoxic
exposures
6.25,
50.0
or
100.0
mg.L−1
Toxics,
Год журнала:
2023,
Номер
11(4), С. 380 - 380
Опубликована: Апрель 17, 2023
A
large
amount
of
nano-/microparticles
(MNPs)
are
released
into
water,
not
only
causing
severe
water
pollution,
but
also
negatively
affecting
organisms.
Therefore,
it
is
crucial
to
evaluate
MNP
toxicity
and
mechanisms
in
water.
There
a
significant
degree
similarity
between
the
genes,
central
nervous
system,
liver,
kidney,
intestines
zebrafish
human
body.
It
has
been
shown
that
exceptionally
suitable
for
evaluating
action
MNPs
on
reproduction,
metabolism.
Providing
ideas
methods
studying
toxicity,
this
article
discusses
from
zebrafish.
Comparative Biochemistry and Physiology Part A Molecular & Integrative Physiology,
Год журнала:
2024,
Номер
295, С. 111669 - 111669
Опубликована: Май 26, 2024
From
review
of
the
very
few
topical
studies
to
date,
we
conclude
that
while
effects
are
variable,
microplastics
can
induce
direct
ionoregulatory
disturbances
in
freshwater
fish
and
invertebrates.
However,
intensity
depends
on
microplastic
type,
size,
concentration,
exposure
regime.
More
numerous
where
indirect
inferences
about
possible
be
drawn;
these
indicate
increased
mucus
production,
altered
breathing,
histopathological
gill
structure,
oxidative
stress,
alterations
molecular
pathways.
All
could
have
negative
homeostasis.
previous
research
has
suffered
from
a
lack
standardized
reporting
characteristics
conditions.
Often
overlooked
is
fact
dynamic
contaminants,
changing
over
time
through
degradation
fragmentation
subsequently
exhibiting
surface
chemistry,
notably
an
presence
diversity
functional
groups.
The
same
groups
characterized
also
present
dissolved
organic
matter,
often
termed
carbon
(DOC),
class
substances
for
which
far
greater
understanding
their
actions.
We
highlight
instances
resemble
those
DOC
exposure.
propose
future
investigations,
vivo
techniques
proven
useful
should
used
including
measurements
transepithelial
potential,
net
unidirectional
radio-isotopic
ion
flux
rates,
concentration
kinetic
analyses
uptake
transport.
sophisticated
vitro
approaches
using
cultured
epithelia,
Ussing
chamber
experiments
surrogate
membranes,
scanning
selective
electrode
(SIET)
may
prove
useful.
Finally,
advocate
minimum
requirements
properties
experimental
conditions
help
advance
this
important
emerging
field.
The Science of The Total Environment,
Год журнала:
2022,
Номер
857, С. 159605 - 159605
Опубликована: Окт. 20, 2022
The
growing
use
of
plastics,
including
microplastics
(MPs),
has
enhanced
their
potential
release
into
aquatic
environments,
where
microalgae
represent
the
basis
food
webs.
Due
to
physicochemical
properties,
MPs
may
act
as
carriers
organic
and
inorganic
pollutants.
present
study
aimed
determine
toxicity
polyethylene
(plain
oxidized)
model
pollutants
chlorpyrifos
(CPF)
mercury
(Hg)
on
red
Rhodomonas
lens,
contribute
understanding
effects
associated
marine
ecosystems,
role
vectors
potentially
harmful
R.
lens
cultures
were
exposed
(1-1000
μg/L;
25-24,750
particles/mL),
CPF
(1-4900
μg/L),
Hg
(1-500
CPF-
Hg-loaded
MPs,
for
96
h.
Average
specific
growth
rate
(ASGR,
day-1),
cellular
viability
pigment
concentration
(chlorophyll
a,
c2
carotenoids)
measured
at
48
No
significant
observed
pattern
after
96-h
exposure
plain
oxidized
MPs.
However,
a
increase
in
cell
was
detected
48-h
A
decrease
ASGR
noticed
CPF,
CPF/Hg-loaded
whereas
affected
by
Hg,
alone
combination.
Chlorophyll
significantly
decreased
when
while
both
pigments
increased
CPF-loaded
Similarly,
chlorophyll
carotenoids
content
higher
tested
concentration.
Overall,
presence
modulates
these
microalgae,
decreasing
toxic
probably
due
lower
bioavailability
contaminants.
New Journal of Chemistry,
Год журнала:
2023,
Номер
47(16), С. 7655 - 7667
Опубликована: Янв. 1, 2023
Wastewater
contains
inorganic
pollutants,
generated
by
industrial
and
domestic
sources,
such
as
heavy
metals,
antibiotics,
chemical
pesticides,
these
pollutants
cause
many
environmental
problems.
