Water,
Год журнала:
2024,
Номер
16(10), С. 1360 - 1360
Опубликована: Май 10, 2024
Micro-
and
nano-plastics
are
pervasive
pollutants
in
global
ecosystems,
yet
their
interactions
with
aquatic
wildlife
abiotic
factors
poorly
understood.
These
particles
recognized
to
cause
subtle
detrimental
effects,
underscoring
the
necessity
for
sensitive
endpoints
ecotoxicological
exposure
studies.
We
investigated
effects
of
particle
uptake,
size,
temperature
on
Hyalella
azteca.
Organisms
were
exposed
blue
fluorescent
polystyrene
beads
(500
nm
1000
diameter)
at
0.43
mg/L
96
h
temperatures
mirroring
climate
predictions
(21
°C,
24
27
°C).
Besides
survival
growth,
visualized
via
confocal
microscopy,
swimming
behavior
analyzed.
Mortality
rates
increased
presence
affected
organism
growth.
Particle
treatments
influenced
various
behaviors
(thigmotaxis,
cruising,
movement,
acceleration,
meander,
zone
alternation,
turn
angle),
hypoactivity
observed
hypo-
as
well
hyper-activity
responses
500
particles.
uptake
quantities
variable
treatments,
but
no
migration
beyond
gut
was
observed.
size
correlated
relationships
evident.
Elevated
exacerbated
highlighting
urgency
addressing
plastic
pollution
light
change
welfare
ecosystem
health.
Water Research,
Год журнала:
2024,
Номер
256, С. 121647 - 121647
Опубликована: Апрель 19, 2024
Retention
of
microplastics
(MPs)
at
the
third
largest
wastewater
treatment
plant
(WWTP)
in
Sweden
was
investigated.
The
is
one
most
modern
and
advanced
its
kind,
with
rapid
sand
filter
for
tertiary
combination
mechanical,
biological,
chemical
treatment.
It
achieved
a
significantly
high
efficiency,
which
brought
MP
concentration
discharge
on
par
concentrations
measured
marine
waters
same
region.
This
novel
data
shows
that
properly
designed
WWTPs
can
reduce
content
sewage
down
to
background
levels
receiving
aquatic
environment.
Opposite
current
understanding
retention
by
WWTPs,
well-designed
WWTP
does
not
have
be
significant
point
source
MP.
MPs
were
quantified
all
major
steps,
including
digester
inlet
outlet
sludge.
sized
10–500
µm
analyzed
focal
plane
array
based
micro-Fourier
transform
infrared
(FPA-µFTIR)
microscopy,
hyperspectral
imaging
technique,
while
above
500
Attenuated
Total
Reflectance-Fourier
(ATR-FTIR)
spectroscopy.
Mass
estimated
from
images
<500
microscope
>500
µm.
overall
efficiency
terms
counts
99.98%,
daily
input
6.42
×
1010
output
1.04
107
particles.
mass
removal
99.99%.
mechanical
part
treatment,
pre-treatment,
primary
stages,
reduced
both
approximately
71%.
combined
biological
secondary
settling,
final
polishing
filtration
removed
nearly
remaining
29%.
became
successively
smaller
as
they
passed
different
steps.
received
1011
daily,
it
discharged
9.96
MPs,
causing
small
but
decrease
counts,
corresponding
reduction
9.56%.
Microplastics
(MPs)
originate
from
industrial
production
of
<1
mm
polymeric
particles
and
the
progressive
breakdown
larger
plastic
debris.
Their
environmental
behavior
is
governed
by
their
interfacial
properties,
which
dominate
due
to
small
size.
This
Perspective
highlights
complex
surface
chemistry
MPs
under
stressors
discusses
how
physical
attributes
like
shape
roughness
could
influence
fate.
We
further
identify
wastewater
treatment
plants
(WWTPs)
as
critical
hotspots
for
MP
accumulation,
where
are
inadvertently
transferred
sewage
sludge
reintroduced
into
environment.
emphasize
potential
colloid
science
not
only
improve
our
fundamental
understanding
but
also
advance
mitigation
strategies
in
such
WWTPs.
Marine Pollution Bulletin,
Год журнала:
2024,
Номер
201, С. 116214 - 116214
Опубликована: Март 7, 2024
Data
on
MP
in
aquatic
environments
have
low
resolution
space
and
time.
Scaling
up
sampling
increasing
analysis
throughput
are
the
main
bottlenecks.
We
combined
two
approaches:
an
uncrewed
surface
vehicle
(USV)
near
infrared
hyperspectral
imaging
(NIR-HSI)
for
of
>
300
μm.
collected
35
water
samples
over
4
d
a
coastal
area.
Samples
were
analyzed
using
NIR-HSI
Fourier
transform
spectroscopy
(FTIR).
Spiked
used
to
determine
recovery.
conclude
that
USV
can
mitigate
issues
traditional
trawls
like
scalability,
repeatability,
contamination.
detects
more
polyethylene
but
less
polypropylene
than
FTIR
reduces
time
significantly.
Highly
variable
concentrations
found
at
both
locations,
with
mean
concentration
0.28
0.01
m
The Analyst,
Год журнала:
2024,
Номер
149(18), С. 4747 - 4756
Опубликована: Янв. 1, 2024
Microplastics
are
an
emerging
anthropogenic
pollutant
risk
with
a
significant
body
of
research
dedicated
to
understanding
the
implications
further.
To
generate
databases
required
characterize
impact
microplastics
on
our
environment,
and
improve
recovery
recycling
current
plastic
materials,
we
need
rapid,
in-line
characterization
that
can
distinguish
individual
polymer
types.
Here,
autofluorescence
spectroscopy
was
investigated
as
alternative
method
leading
techniques
based
vibrational
spectroscopy.
It
confirmed
seven
common
textile
polymers
(acrylic,
polyester,
nylon,
polyethylene,
polypropylene,
cellulose/cotton,
wool)
arose
due
cluster-triggered
emission
phenomenon.
Both
simulated
aging
