In
recent
years,
filamentous
algae
blooms
and
microplastic
pollution
have
become
two
major
ecological
environmental
problems
in
urban
river
systems.
However,
the
interaction
between
microplastics
(MPs)
has
not
been
clearly
studied
context
of
remediation.
Therefore,
aim
this
work
was
to
investigate
effect
fresh
algal
biochar
on
MPs
removal.
Microscope
images
revealed
that
could
interact
with
form
entanglement,
adhesion
encapsulation.
The
average
load
samples
14.1
±
5
items/g
dry
weight,
shape
were
mainly
fibrous
(72.1%
5%).
theoretical
maximum
adsorption
capacities
polystyrene
(PS-MPs)
by
raw
(A500)
magnetic
F3O4
(M2A500)
176.99
mg/g
215.58
mg/g,
respectively.
fact
M2A500
presented
higher
capacity
PS-MPs
attributed
π-complexation
Fe3O4
particles
PS-MPs.
Overall,
these
findings
provided
new
insights
into
use
for
situ
remediation
fluvial
pollution,
as
well
feasible
strategies
recycling
waste.
Marine Pollution Bulletin,
Год журнала:
2024,
Номер
202, С. 116231 - 116231
Опубликована: Март 29, 2024
Microplastic
(MP)
pollution
poses
a
global
concern,
especially
for
benthic
invertebrates.
This
one-month
study
investigated
the
accumulation
of
small
MP
polymers
(polypropylene
and
polyester
resin,
3–500
μm,
250
μg
L−1)
in
invertebrates
on
one
alga
species.
Results
revealed
species-specific
preferences
size
type,
driven
by
ingestion,
adhesion,
or
avoidance
behaviours.
Polyester
resin
accumulated
Mytilus
galloprovincialis,
Chamelea
gallina,
Hexaplex
trunculus,
Paranemonia
cinerea,
while
polypropylene
Ulva
rigida.
Over
time,
decreased
count
but
not
size,
averaging
6.2
±
5.0
particles
per
individual
after
month.
were
mainly
found
inside
organisms,
gut,
gills,
gonads
externally
adherent
ranged
from
11
to
35
%
total.
Biochemical
energy
assessments
two
weeks
exposure
indicated
gains
water
column
species
loss
sediment-associated
species,
highlighting
susceptibility
infaunal
communities
contamination.
Environmental Pollution,
Год журнала:
2024,
Номер
348, С. 123801 - 123801
Опубликована: Март 23, 2024
Microplastics
and
other
microscopic
debris
are
a
concern
in
the
coastal
environment
but
measurements
water
column
sediment
often
problematic
rely
on
non-standardised
highly
variable
methodologies.
To
this
end,
we
explore
potential
of
different
species
temperate-cold
marine
macroalgae
as
passive
biomonitors
anthropogenic
microparticles
at
three
contrasting
locations
southwest
England.
Specifically,
fronds
from
samples
fucoids
Ulva
lactuca
(n
=
9
total,
each
location)
have
been
sectioned
analysed
directly
under
microscope
counted
subsequently
characterised
for
chemical
composition.
Microparticles
were
heterogeneously
distributed
throughout
sections
same
sample.
However,
dry
weight
basis,
combined
microparticle
concentrations
sample
ranged
about
7.5
g-1
to
110
g−1,
0.2
cm−2
0.9
cm−2,
given
higher
semi-enclosed
harbour
urban
beach
than
protected
facing
open
sea.
These
values
compare
with
published
microplastics
microfibres
reported
regional
order
0.1
m-3.
Most
particles
cellulosic
(e.g.,
rayon)
petroleum-based
(mainly
polyester
polyethylene
terephthalate)
fibres
plastic
fragments
also
present
most
samples.
Glass
retroreflective
beads
derived
road
markings
up
18
g−1
because
its
proximity
stormwater
effluent.
adhered
smooth
parts
macroalgal
surface
some
displayed
wrapping
around
edges
creases
or
entrapment
by
appendages.
The
practical
environmental
implications
passively
capturing
significant
quantities
discussed.
Water,
Год журнала:
2023,
Номер
15(6), С. 1160 - 1160
Опубликована: Март 17, 2023
Little
is
known
about
the
comprehensive
factors
influencing
temporal
changes
in
microplastic
abundance
marine
ecosystems.
We
investigated
seasonal
variations
distribution
sediments
multiple-used
zones
of
Eastern
Guangdong
South
China
Sea.
The
top
10
cm
from
26
sites
were
collected
by
grab
sampling
spring,
summer,
and
winter
2021.
Marine
had
lowest
significantly
lower
than
other
seasons.
size
microplastics
varied
22.5
to
4363.3
µm
but
50–200
range
was
most
abundant.
Transparent
fragmented
frequently
observed
composition.
Microplastic
negatively
correlated
distance
coast.
However,
seaweed
ecosystems
impacted
changing
microenvironment
and/or
direct
contact
entrapment.
closely
related
coastal
mariculture
local
residential
industrial
activities.
Polypropylene,
polypropylene-polyethylene
copolymer,
polyethylene
terephthalate,
detected
compositions,
probably
packaging
materials,
textiles,
electronic/electrical/building
industries.
This
work
helps
understand
role
their
influence
on
distributions
Appropriate
management
use
disposal
plastic
waste
land
recommended
alleviate
pollution
environment.
Annals of Botany,
Год журнала:
2023,
Номер
133(1), С. 1 - 16
Опубликована: Ноя. 23, 2023
Abstract
Background
Marine
macroalgae
(‘seaweeds’)
are
a
diverse
and
globally
distributed
group
of
photosynthetic
organisms
that
together
generate
considerable
primary
productivity,
provide
an
array
different
habitats
for
other
organisms,
contribute
many
important
ecosystem
functions
services.
As
result
continued
anthropogenic
stress
on
marine
systems,
macroalgal
species
face
uncertain
future,
risking
their
vital
contribution
to
global
productivity
service
provision.
Scope
After
briefly
considering
the
remarkable
taxonomy
ecological
distribution
macroalgae,
we
review
how
threats
posed
by
combination
anthropogenically
induced
stressors
affect
seaweed
communities.
From
there
highlight
five
critical
avenues
further
research
explore
(long-term
monitoring,
use
functional
traits,
focus
early
ontogeny,
biotic
interactions
impact
litter
coastal
vegetation).
Conclusions
Although
parallels
with
terrestrial
vascular
plant
responses
stressors,
note
impacts
some
(e.g.
habitat
loss)
much
less
keenly
felt
in
oceans
than
land.
Nevertheless,
common
communities,
climate
change
will
inevitably
be
most
pernicious
threat
future
persistence
species,
communities
While
understanding
simultaneous
environmental
is
complex
exercise,
our
attempt
synergies
priorities
elucidate
trends
mechanisms
response,
may
yet
offer
small
this
goal.
