Environmental Pollution,
Год журнала:
2022,
Номер
308, С. 119721 - 119721
Опубликована: Июль 6, 2022
Microplastics
(MPs),
widely
present
in
aquatic
ecosystems,
can
be
ingested
by
numerous
organisms,
but
their
toxicity
remains
poorly
understood.
Toxicity
of
environmental
MPs
from
2
beaches
located
on
the
Guadeloupe
archipelago,
Marie
Galante
(MG)
and
Petit-Bourg
(PB)
near
North
Atlantic
gyre,
was
evaluated.
A
first
experiment
consisted
exposing
early
life
stages
zebrafish
(Danio
rerio)
to
at
1
or
10
mg/L.
The
exposure
particles
water
induced
no
toxic
effects
except
a
decrease
larval
swimming
activity
for
both
exposures
(MG
PB).
Then,
second
performed
as
chronic
feeding
over
4
months,
using
freshwater
fish
species,
zebrafish,
marine
medaka
(Oryzias
melastigma).
Fish
were
fed
with
food
supplemented
environmentally
relevant
concentrations
(1%
wet
weight
food)
sites.
Chronic
led
growth
alterations
species
exposed
either
MG
PB
more
pronounced
medaka.
Ethoxyresorufin-O-deethylase
(EROD)
acetylcholinesterase
(AChE)
activities
only
altered
Reproductive
outputs
modified
following
70
42%
medaka,
respectively.
Offspring
(F1
generation)
reared
evaluate
parental
unexposed
larvae.
For
offspring,
it
revealed
premature
mortality
after
produced
behavioural
disruptions
hyperactivity
F1
This
not
observed
offspring.
study
highlights
ecotoxicological
consequences
short
long-term
microplastics
coastal
areas,
which
represent
essential
habitats
wide
range
organisms.
Environmental Science & Technology,
Год журнала:
2022,
Номер
56(20), С. 14507 - 14516
Опубликована: Сен. 26, 2022
Phthalic
acid
esters
(phthalates)
have
been
detected
everywhere
in
the
environment,
but
data
on
leaching
kinetics
and
governing
mass
transfer
process
into
aqueous
systems
remain
largely
unknown.
In
this
study,
we
experimentally
determined
time-dependent
curves
for
three
phthalates
di(2-ethylhexyl)
phthalate,
terephthalate,
diisononyl
phthalate
from
polyvinyl
chloride
(PVC)
microplastics
thereby
enabled
a
better
understanding
of
their
kinetics.
This
is
essential
exposure
assessment
to
predict
microplastic-bound
environmental
concentrations
phthalates.
Leaching
were
analyzed
using
models
intraparticle
diffusion
(IPD)
boundary
layer
(ABLD).
We
show
that
ABLD
continuous
because
are
very
hydrophobic
(partitioning
coefficients
between
PVC
water
log
KPVC/W
higher
than
8.6),
slowing
down
through
ABL.
Also,
coefficient
polymer
DPVC
relatively
high
(∼8
×
10–14
m2
s–1)
thus
enhances
IPD.
Desorption
half-lives
studied
greater
500
years
can
be
strongly
influenced
by
factors.
By
combining
experiments
modeling,
our
results
reveal
long-term
source
environment.
