Frontiers in Marine Science,
Journal Year:
2023,
Volume and Issue:
10
Published: Aug. 14, 2023
Globally,
the
abundance
of
microplastics
in
our
oceans
is
increasing,
including
within
remote
locations
polar
regions.
The
Barents
Sea,
which
adjoins
Arctic
Ocean,
an
area
high
primary
productivity
that,
owing
to
convergence
regional
currents,
has
been
mooted
as
a
potential
sixth
ocean
gyre
that
may
coalesce
concentrations
plastic
debris.
This
study
aimed
explore
data
collected
from
large
volume
samples
sub-surface
water
transects
through
Sea
quantify
and
characterise
this
region,
with
focus
on
impacts
zooplankton.
Overall,
mean
microplastic
was
0.011
m
-3
(range:
0.007
–
0.015
).
Microplastics
were
found
higher
abundances
nearer
land
mass
at
southern
end
transect
northwards
towards
ice
edge,
recording
during
both
legs.
predominantly
fibrous
(92.1%)
typically
blue
(79%)
or
red
(17%)
colour.
A
range
polymers
identified
polyester
(3.8%),
copolymer
blends
(2.7%),
elastomers
(7.1%)
acrylics
(10.6%),
however
semi-synthetic
dominated,
comprising
74.4%
particles
found.
Higher
northernmost
stem
melting
sea-ice,
while
southernmost
likely
derive
long-range
transport
via
currents
Europe.
Microplastics and Nanoplastics,
Journal Year:
2024,
Volume and Issue:
4(1)
Published: April 17, 2024
Abstract
Upon
entering
the
environment,
surface
properties
of
pristine
plastics
are
rapidly
altered
due
to
interactions
with
exogenous
biomolecules,
contaminants,
and
even
microbiota,
which
ultimately
alter
their
ecological
impacts.
When
present
in
biological
fluids
or
high
protein
environments,
micro(nano)plastics
bind
proteins,
form
a
corona
around
particle.
Although
significant
body
literature
exists
on
formation
nanomaterials,
less
is
known
about
how
physiochemical
microplastics
may
influence
formation.
This
study
utilises
quantitative
proteomics
quantify
binding
leached
microplastics.
Pristine
polyethylene
(PE)
beads
(50
500
μm),
polyamide
(PA)
fibres
(100
terephthalate
(500
fragments
(<
300
as
well
textile
microfibres
comprised
PET,
recycled
PA
cotton
were
incubated
for
24
h
bovine
serum
albumin
solution
(2
mg
mL
−1
)
corona.
Protein
adsorption
was
dependant
particle
area
volume
ratio
but
only
when
additives
absent.
For
environmentally
relevant
microfibres,
adsorbed
significantly
more
than
synthetic
microfibres.
Fourteen-day
aqueous
leaching
increased
zeta
potential
all
However,
higher
compared
counterparts.
Overall,
presence
chemical
strongly
influenced
formation,
this
phenomenon
should
be
incorporated
into
routine
microplastic
toxicity
assessment.
Graphical
Green Analytical Chemistry,
Journal Year:
2023,
Volume and Issue:
5, P. 100057 - 100057
Published: April 22, 2023
Microplastics
(MPs)
are
pervasive
contaminants
with
unclear
toxicological
impacts.
Current
research
on
MP
pollution
relies
low-throughput
methodologies,
which
time-consuming
and
cannot
directly
measure
concentration
in
suspensions.
This
study
presents
a
qualitative
quantitative
flow
cytometry-based
method
for
analysing
MPs
water,
offering
faster
more
sustainable
alternative.
The
involves
density
separation
to
remove
interfering
particles,
UV
irradiation
eliminate
microorganisms,
filtration
particles
above
100
µm.
sensitivity
of
the
different
types
MPs,
such
as
polystyrene
(PS),
polypropylene
(PP),
polyvinyl
chloride
(PVC),
polyethylene
terephthalate
(PET),
polyamide
(PA)
microbeads,
ranges
from
2
µg/L
1
mg/L.
For
these
good
linearity
was
found
matrix-matched
calibration
where
most
concentrated
standard
5
mg/L
(R2
0.9820–0.9989)
although
linear
range
can
be
larger
(e.g.
42
mg
MP/L
PS
microbeads).
repeatability
reproducibility
model
were
<17.0%
8.5%,
respectively.
sample
treatment
consisting
pretreatment,
when
carried
out
independently,
led
95.0%
93.4%
recoveries.
overall
trueness
optimized
various
sizes
compositions
microbeads
is
about
97%,
according
validation
supported
by
microscopy
analysis.
substitute
traditional
analytical
approach
based
counting
microscopy.
Frontiers in Marine Science,
Journal Year:
2023,
Volume and Issue:
10
Published: Aug. 14, 2023
Globally,
the
abundance
of
microplastics
in
our
oceans
is
increasing,
including
within
remote
locations
polar
regions.
The
Barents
Sea,
which
adjoins
Arctic
Ocean,
an
area
high
primary
productivity
that,
owing
to
convergence
regional
currents,
has
been
mooted
as
a
potential
sixth
ocean
gyre
that
may
coalesce
concentrations
plastic
debris.
This
study
aimed
explore
data
collected
from
large
volume
samples
sub-surface
water
transects
through
Sea
quantify
and
characterise
this
region,
with
focus
on
impacts
zooplankton.
Overall,
mean
microplastic
was
0.011
m
-3
(range:
0.007
–
0.015
).
Microplastics
were
found
higher
abundances
nearer
land
mass
at
southern
end
transect
northwards
towards
ice
edge,
recording
during
both
legs.
predominantly
fibrous
(92.1%)
typically
blue
(79%)
or
red
(17%)
colour.
A
range
polymers
identified
polyester
(3.8%),
copolymer
blends
(2.7%),
elastomers
(7.1%)
acrylics
(10.6%),
however
semi-synthetic
dominated,
comprising
74.4%
particles
found.
Higher
northernmost
stem
melting
sea-ice,
while
southernmost
likely
derive
long-range
transport
via
currents
Europe.
