Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(22), P. 8355 - 8364
Published: May 23, 2023
The
ban/elimination
of
legacy
per-
and
polyfluoroalkyl
substances
(PFASs)
has
led
to
a
dramatic
increase
in
the
production
use
various
emerging
PFASs
over
past
decade.
However,
trophodynamics
many
aquatic
food
webs
remain
poorly
understood.
In
this
study,
samples
seawaters
marine
organisms
including
15
fish
species,
21
crustacean
two
cetacean
species
were
collected
from
northern
South
China
Sea
(SCS)
investigate
trophic
biomagnification
potential
PFASs.
Bis(trifluoromethylsulfonyl)imide
was
found
seawater
via
suspect
screening
(concentration
up
1.50
ng/L)
but
not
biota,
indicating
its
negligible
bioaccumulation
potential.
A
chlorinated
perfluorooctane
sulfonate
(PFOS)
analytical
interfering
compound
identified
with
predicted
formula
C
Environmental Science & Technology,
Journal Year:
2022,
Volume and Issue:
56(8), P. 5009 - 5019
Published: April 8, 2022
Ultraviolet
absorbents
(UVAs)
and
industrial
antioxidants
(IAs)
are
contaminants
of
emerging
concern.
In
this
study,
we
investigated
the
distribution
partitioning
these
in
surface
water,
suspended
particulate
matter
(SPM),
sediment,
various
tissues
lake
sturgeon
(Acipenser
fulvescens)
northern
pike
(Esox
lucius)
from
St.
Lawrence
River
(SLR),
Quebec,
Canada.
Results
indicated
that
2,6-di-tert-butyl-1,4-benzoquinone
(BHTQ)
was
dominant
contaminant
dissolved
phase
with
median
concentrations
43,
15,
123
ng/L
for
three
sampling
sites,
respectively.
Surface
water
collected
downstream
a
major
city
showed
higher
levels
UVAs,
BHTQ,
diphenylamine
compared
to
upstream,
suggesting
influence
urban
activities
on
contamination
SLR.
SPM
greater
sorption
capacities
most
target
those
sediment.
Different
profiles
were
found
pike,
implying
accumulation
UVAs
IAs
fish
depends
their
feeding
behavior.
The
field-based
tissue-specific
bioaccumulation
factors
(BAFs)
frequently
detected
(log
BAF
1.5-4.2)
generally
comparable
or
lower
than
Estimation
Program
Interface
modeling
results
(1.4-5.0),
indicating
some
may
be
less
bioaccumulative
previously
expected.
Critical Reviews in Environmental Science and Technology,
Journal Year:
2022,
Volume and Issue:
53(15), P. 1431 - 1451
Published: Nov. 11, 2022
Antibiotics
are
emerging
pollutants
widely
existing
in
the
aquatic
environment
with
adverse
effects
on
both
humans
and
organisms.
Understanding
bioaccumulation
of
antibiotics
organisms
is
important
for
their
risk
assessment.
Observations
metrics
(including
bioconcentration
factor,
biomagnification
trophic
magnification
biota-sediment
accumulation
factor)
reviewed
this
contribution.
It
revealed
that
close
attention
should
be
paid
to
enrofloxacin,
sulfamethiazole,
doxycycline,
sulfadimidine,
clarithromycin,
azithromycin,
chloramphenicol,
because
they
have
high
potential
logarithm
factor
values
beyond
a
threshold
(3.3
L/kg)
stipulated
REACH
regulation.
Physicochemical
properties
(e.g.,
pH-dependent
octanol-water
partition
coefficient
liposome-water
distribution
coefficient),
biological
characteristics
lipid
content,
biotransformation
potential,
growth
stages,
feeding
habits)
as
well
environmental
factors
presence
sediment,
pH,
salinity,
exposure
concentrations,
co-existence
dissolved
organic
matter,
heavy
metals,
microplastics)
can
control
One-compartment
multi-compartment
toxicokinetic
models
summarized.
The
mainly
focused
fish,
suggesting
more
efforts
needed
construct
other
species.
Knowledge
gaps
critical
research
directions
were
highlighted.
Environmental Science & Technology,
Journal Year:
2022,
Volume and Issue:
56(20), P. 14562 - 14573
Published: Oct. 5, 2022
Ultraviolet
(UV)
absorbents
and
industrial
antioxidants
are
contaminants
of
emerging
concern
(CECs),
but
little
is
known
about
their
distribution
in
Arctic
wildlife,
as
well
how
these
vary
over
time,
across
regions,
between
species.
We
used
archived
egg
samples
to
examine
the
temporal
patterns
26
UV
three
seabird
species
(black-legged
kittiwakes
Rissa
tridactyla,
thick-billed
murres
Uria
lomvia,
northern
fulmars
Fulmarus
glacialis)
sampled
Canada
1975
2019.
Various
synthetic
phenolic
antioxidants,
aromatic
secondary
amines,
benzotriazole
stabilizers,
organic
filters
were
detected
eggs.
Overall,
had
higher
levels
several
antioxidants.
Most
target
reached
peak
concentrations
at
different
points
during
44-year
study
period
or
did
not
significantly
time.
None
contaminant
have
increased
recent
years.
The
antioxidant
2-6-di-tert-butyl-4-methylphenol
(BHT)
was
most
frequently
eggs,
its
level
declined
course
kittiwake
eggs
change
fulmars.
Future
research
should
effects
CECs
on
health
avian
species,
sources,
exposure
pathways
contaminants.
ACS Nano,
Journal Year:
2023,
Volume and Issue:
17(19), P. 19410 - 19420
Published: Oct. 2, 2023
As
emerging
contaminants,
micro/nanoplastics
(MNPs)
are
widely
present
in
aquatic
environments
and
often
ingested
by
organisms.
However,
the
vivo
trafficking
fate
of
MNPs
remain
largely
unknown.
Here,
we
developed
near-infrared
(NIR)
aggregated-induced
emission
(AIE)
fluorophore-labeled
microplastics
(2
μm)
nanoplastics
(100
nm)
as
models
MNPs.
This
model
was
based
on
NIR-AIE
technique
with
strong
at
second
(NIR-IIII)
window,
which
overcomes
interference
autofluorescence
observation
artifacts
detection
commercial
fluorescent-labeled
particles.
Due
to
its
deep
tissue
penetration
noninvasiveness,
dynamic
process
accumulation
transport
individuals
can
be
tracked
NIR
imaging.
We
then
directly
visualized
quantified
uptake
depuration
processes
MPs
NPs
zebrafish.
The
results
showed
that
were
mainly
accumulated
fish
gut,
distribution
heterogeneous.
tended
accumulate
more
fore
mid
areas
gut
compared
NPs.
Besides,
both
could
large
quantities
locally
might
cause
intestinal
obstruction.
slowly
during
initial
exposure
followed
rapid
sustained
gut.
Based
these
kinetic
depuration,
a
refined
toxicokinetic
(TK)
describe
changes
Overall,
this
study
proposed
MNP
technique,
provided
reliable
tracer
technology
for
visualization,
tracking
quantification
vivo.
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(8), P. 3714 - 3725
Published: Feb. 13, 2024
Chemicals
mainly
exist
in
ecosystems
as
mixtures,
and
understanding
predicting
their
effects
are
major
challenges
ecotoxicology.
While
the
adverse
outcome
pathway
(AOP)
toxicokinetic–toxicodynamic
(TK–TD)
models
show
promise
mechanistic
approaches
chemical
risk
assessment,
there
is
still
a
lack
of
methodology
to
incorporate
AOP
into
TK–TD
model.
Here,
we
describe
novel
approach
that
integrates
predict
mixture
toxicity
using
metal
mixtures
(specifically
Cd–Cu)
case
study.
We
preliminarily
constructed
an
through
temporal
transcriptome
analysis
together
with
confirmatory
bioassays.
The
revealed
prolonged
exposure
time
activated
more
key
events
outcomes,
indicating
different
modes
action
over
time.
selected
potential
event
proxy
for
damage
used
it
measurable
parameter
replace
theoretical
(scaled
damage)
This
refined
model,
which
connects
molecular
responses
organism
effectively
predicts
Cd–Cu
can
be
extended
other
even
multicomponent
mixtures.
Overall,
our
results
contribute
better
provide
insights
integrating
improve
assessment
