Marine Pollution Bulletin,
Journal Year:
2024,
Volume and Issue:
203, P. 116417 - 116417
Published: May 2, 2024
Estuaries
have
been
shown
to
be
potential
hotspots
of
microplastic
accumulation,
but
the
hydrodynamic
conditions
and
particle
properties
that
control
this
process
need
further
investigation.
We
designed
a
series
numerical
particle-tracking
experiments
examine
sensitivity
retention
in
estuaries
size,
density
varying
tides
freshwater
flow.
At
end
simulation,
over
90
%
sinking
particles
are
retained
estuary,
rate
is
increased
by
high
river
runoff.
In
contrast,
discharge
increases
number
marginally-buoyant
(i.e.
close
estuarine
water)
escape
estuary.
Larger
size
tends
limit
downstream
transport
can
facilitate
particles.
Tidal
asymmetry,
vertical
turbulent
mixing
structure
subtidal
circulation
proposed
as
underlying
mechanisms
controlling
fate
ACS ES&T Water,
Journal Year:
2024,
Volume and Issue:
4(6), P. 2470 - 2481
Published: May 16, 2024
Macroplastic
fate
and
transport
in
the
freshwater
environment
are
of
great
concern
due
to
potentially
harmful
effects
macroplastic
on
plants,
animals,
humans.
Here,
we
present
a
modeling
approach
simulate
at
country
scale
based
an
existing
plastic
release
model.
The
model
was
parametrized
through
available
monitoring
data
results
from
field
experiments
applied
Swiss
rivers
lakes.
We
found
that
almost
all
(98%)
emissions
into
remain
within
Switzerland.
After
exploring
influences
weirs,
retention
rivers,
lakes
sensitivity
analysis,
high
variability
across
different
catchments
rivers.
In
22
analyzed
scenarios
for
continuous
along
each
river
bank
(i.e.,
beaching),
least
70%
input
water
bodies
would
be
retained
long-term
(about
200
g
per
km
year).
Across
catchments,
dominance
"continuous
retention"
beaching
entire
length
compared
with
"point
weirs
or
Thus,
by
level
first
time,
were
able
confirm
concept
"rivers
as
reservoirs"
modeling.
Journal of Hazardous Materials,
Journal Year:
2022,
Volume and Issue:
443, P. 130271 - 130271
Published: Oct. 28, 2022
The
plastisphere
has
been
widely
studied
in
the
oceans;
however,
there
is
little
information
on
how
living
organisms
interact
with
freshwater
ecosystems,
and
particularly
this
interaction
changes
over
time.
We
have
characterized,
one
year,
evolution
of
eukaryotic
bacterial
communities
colonizing
four
everyday
plastic
items
deployed
two
sites
same
river
different
anthropogenic
impact.
α-diversity
analyses
showed
that
site
had
a
significant
role
diversity,
most
impacted
having
higher
values
Shannon
diversity
index.
β-diversity
explained
sample
variation
followed
by
substrate
type
(i.e.,
item)
time
since
first
colonization.
In
regard,
core
microbiomes/biomes
each
at
1,
3,
6
12
months
could
be
identified
genus
level,
giving
global
overview
measured
concentration
antibiotics
water
positively
correlated
abundance
antibiotic
resistance
genes
(ARGs)
plastics.
These
results
provide
relevant
temporal
dynamics
ecosystems
emphasize
potential
contribution
to
spread
resistance.
Frontiers in Environmental Science,
Journal Year:
2022,
Volume and Issue:
10
Published: Aug. 24, 2022
Land-based
plastic
waste
is
the
major
source
for
freshwater
and
marine
pollution.
Yet,
transport
pathways
over
land
remain
highly
uncertain.
Here,
we
introduce
a
new
conceptual
model
to
forecast
on
land:
Plastic
Pathfinder
;
numerical
that
simulates
spatiotemporal
distribution
of
macroplastic
(>0.5
cm)
at
river
basin
scale.
The
driving
forces
are
wind
surface
runoff,
while
resisted
by
terrain
friction.
friction,
function
slope
use,
converted
into
thresholds
define
critical
runoff
conditions
required
mobilize
waste.
When
and/or
exceed
their
respective
thresholds,
(re)distribution
plastics,
resulting
in
accumulation
hotspots
maps
high
probability
route
maps.
contributes
better
mechanistic
understanding
through
terrestrial
environments,
upon
future
calibration
validation,
can
serve
as
practical
tool
optimize
prevention,
mitigation,
reduction
strategies.
Environmental Pollution,
Journal Year:
2023,
Volume and Issue:
320, P. 121124 - 121124
Published: Jan. 20, 2023
In
river
plastic
pollution
research
little
is
known
about
the
detailed
pathways
and
interruptions
that
occur
during
journey
of
macroplastic
debris
(>5
cm)
from
land
to
sea.
Data
on
fine-scale
high-accuracy
transport
trajectories
cycles
retention
(when
macroplastics
are
trapped,
e.g.
at
a
pier)
remobilisation
needed
inform
global
models
as
well
mechanical
cleanup
efforts.
Though
established
in
marine
environment,
use
floating
satellite
drifters
understand
tidal
rivers
estuaries
its
infancy.
Exploring
capacity
investigate
debris-estuary
interactions,
this
study
brings
together,
one
hand,
small,
sensitive,
drifter
with,
other
major
riverine-marine
habitat
Chao
Phraya
River
estuary
Bangkok,
Thailand.
The
used
grapefruit-sized
(n
=
5)
with
minimal
drogue
(ρ
≈
0.67
g/cm3)
sent
their
positions
up
4
m
5
min
spatiotemporal
resolution
via
cellular
GSM
network
for
48
days.
This
indicates
'hotlines'
(positions
where
will
likely
pass
by
river)
retention-remobilisation
can
be
studied
fine
scale.
On
way
through
gulf,
covering
between
9
696
km,
got
stuck
23
times,
spending
80%
lifetime
retention.
Furthermore,
it
outlined
linked
environmental
factors
such
bathymetry
tides
more
accurately
model
behaviour
rivers.
Finally,
shown
crossing
continuum
traced
support
future
investigations
so
far
scarcely
evidenced
mouth
emissions
debris.
Marine Pollution Bulletin,
Journal Year:
2024,
Volume and Issue:
206, P. 116822 - 116822
Published: Aug. 9, 2024
Estuaries
can
behave
as
plastic
pollution
hotspots,
although
the
dynamics
of
accumulation
in
these
unique
habitats
are
not
understood.
We
quantified
current
levels
meso-,
micro-,
and
nanoplastic
four
Los
Angeles
County
estuaries
for
first
time,
a
function
distance
from
water
outlet
local
population
density.
Fourier-transform
infrared
spectroscopy
(FTIR)
microscope
imaging
revealed
presence
six
types
plastic;
polyethylene
or
polypropylene
dominated
meso-
microplastic,
nanoplastics
were
identified
mainly
polyolefin
fibers.
The
distribution
was
heterogeneous
throughout,
sand
between
river
mouth
ocean
generally
contained
more
than
inland
control
samples.
Population
density
did
appear
to
affect
abundance
estuarine
pollution.
Other
factors,
such
waste
treatment
effluent,
recreation,
geography,
may
contribute
deposition.
A
positive
correlation
microplastic
provides
insight
into
mechanisms
accumulation.
Sensors,
Journal Year:
2025,
Volume and Issue:
25(3), P. 937 - 937
Published: Feb. 4, 2025
Plastic
pollution
in
waterways
poses
a
significant
global
challenge,
largely
stemming
from
land-based
sources
and
subsequently
transported
by
rivers
to
marine
environments.
With
substantial
percentage
of
plastic
waste
originating
sources,
comprehending
the
trajectory
temporal
experience
single-use
bottles
assumes
paramount
importance.
This
project
designed,
developed,
released
tracking
device,
coinciding
with
Vietnam’s
annual
Awareness
Month.
By
mapping
tracker’s
journey
through
Saigon
River,
this
study
generated
high-fidelity
data
for
comprehensive
analysis
bolstered
public
awareness
regular
updates
on
Re-Think
Plastics
Vietnam
website.
The
equipped
technologies
such
as
drone
flight
controller,
open-source
software,
embedded
computing,
cellular
networking
effectively
captured
GPS
position,
track,
localized
conditions
experienced
bottle
tracker
its
journey.
amalgamation
contributes
understanding
behaviors
serves
set
future
initiatives
aimed
at
prevention
ecologically
sensitive
Mekong
Delta.
illuminating
transportation
riparian
Ho
Chi
Minh
City
beyond,
plays
role
collective
efforts
understand
preserve
aquatic
ecosystems.
deploying
GPS-enabled
tracker,
provides
novel,
high-resolution
empirical
transport
urban
tidal
systems.
These
findings
contribute
improving
interception
strategies
informing
environmental
policies
reducing
accumulation
critical
retention
zones.
