Sensors and Actuators Reports,
Journal Year:
2024,
Volume and Issue:
8, P. 100241 - 100241
Published: Aug. 30, 2024
Microplastics
(MPs)
are
global
pollutants
found
in
various
environmental
compartments,
including
oceans,
freshwater
bodies,
soils,
and
air.
Their
persistence
potential
to
adsorb
heavy
metals
raise
significant
concerns
regarding
water
quality
ecosystem
health.
Understanding
the
interaction
between
MPs
is
crucial
for
assessing
risks
developing
remediation
strategies.
In
this
study,
we
use
electroanalytical
techniques
investigate
adsorption
of
metal
ions—
Cr³⁺,
Zn²⁺,
Ni²⁺—by
polystyrene
with
different
surface
functionalizations:
carboxyl,
amino,
unfunctionalized.
We
conducted
electrodeposition
ions
on
a
gold
ultramicroelectrode
both
before
after
mixing
MPs.
Following
this,
used
anodic
stripping
voltammetry
measure
change
electrodeposited
charge
(ΔQ).
This
difference,
observed
MPs,
was
analyzed
understand
kinetics
dynamics.
Our
experiments
revealed
that
carboxyl-functionalized
exhibited
highest
ΔQ
due
strong
electrostatic
attraction
ions,
values
1.67
×,
1.50
1.22
×
greater
than
those
amino-MPs
Ni²⁺,
respectively.
Amino-MPs
displayed
considerable
ion
adsorption,
suggesting
poor
repulsion
two
positively
charged
entities.
Interestingly,
unfunctionalized
which
had
negative
similar
carboxyl-MPs,
showed
characteristics,
lower
all
ions.
study
underscores
role
functionalization
efficiency
by
It
also
demonstrates
utility
understanding
ion-MP
interactions,
offering
insights
into
impacts
strategies,
as
well
electrochemical
sensors
detecting
adsorbed
Environmental Technology & Innovation,
Journal Year:
2024,
Volume and Issue:
35, P. 103729 - 103729
Published: June 26, 2024
The
interaction
between
microplastics
(MPs)
and
pollutants
is
crucial
for
assessing
the
environmental
risk
of
MPs.
It
necessary
to
pay
attention
adsorption/desorption
behavior
antibiotics
on
MPs
due
their
potential
role
in
antibiotic
resistance.
When
MPs-loaded
are
ingested
by
organisms,
they
enter
gastrointestinal
tract
undergo
desorption,
leading
corresponding
toxic
effects.
Existing
literature
primarily
focuses
adsorption
behavior,
while
there
a
lack
systematic
generalizations
desorption
or
combined
effects
organisms.
Therefore,
this
article
provides
review
mechanisms,
biological
tract.
Desorption
suggests
that
characteristics
(aging
hydrophobicity)
components
fluid
(digestive
enzyme
species
pH)
can
also
have
effect
desorption.
Moreover,
summarizes
induced
MPs-antibiotics,
demonstrating
either
enhance
reduce
plants,
microorganisms,
aquatic
animals.
Since
methodological
uniformity
relevance
natural
environment
main
shortcomings
existing
literature,
future
research
should
focus
actual
water
given
region
studying
at
gene,
protein,
metabolic
levels.
This
direction
expected
provide
valuable
references
insights
evaluating
antibiotics.
Ecotoxicology and Environmental Safety,
Journal Year:
2024,
Volume and Issue:
282, P. 116749 - 116749
Published: July 17, 2024
Excessive
nanoplastics
not
only
pose
a
direct
threat
to
the
environment
but
also
have
propensity
adsorb
and
interact
with
other
pollutants,
exacerbating
their
impact.
The
coexistence
of
heavy
metals
in
soils
is
prevalent
phenomenon.
However,
limited
research
existed
about
joint
effects
two
contaminants
on
soil
organisms.
In
this
paper,
we
ascertained
combined
toxicity
polystyrene
(PS-NPs)
copper
(Cu2+)
organisms
(Caenorhabditis
elegans)
at
quantities
that
were
present
environment,
further
exploring
whether
toxicants
synergistic
or
antagonistic.
outcomes
manifested
single
exposure
low-dose
PS-NPs
(1
μg/L)
would
cause
significant
damage
nematodes.
After
treatment
Cu2+,
locomotion
ability
nematode
was
impaired,
accompanied
by
an
elevation
reactive
oxygen
species
(ROS)
level
biphasic
response
antioxidant
enzyme
activity.
Moreover,
Cu2+
induced
mRNA
up-regulation
vit-6,
cyp-35a2,
hsp-16.2,
age-1,
cep-1,
both
which
stress-related
genes.
comparative
analysis
between
groups
(with
without
PS-NPs)
revealed
group
resulted
significantly
greater
toxic
nematodes
compared
alone.
Furthermore,
addition
influenced
metabolic
profiles
Caenorhabditis
elegans
under
stress,
numerous
differential
metabolites
associated
oxidative
defense
mechanism.
Overall,
these
findings
expected
environmental
concentration
elevated
Emerging contaminants,
Journal Year:
2024,
Volume and Issue:
11(1), P. 100394 - 100394
Published: July 20, 2024
Microplastic
(MP)
contamination
in
freshwater
systems
is
a
prevalent
and
persistent
environmental
issue,
yet
their
occurrence
distribution
remain
poorly
constrained.
The
present
study
examines
the
MPs
abundance
sediment
water
samples
factors
controlling
Manasbal
Lake,
north-western
(NW)
Himalaya.
Additionally,
investigates
relationship
between
heavy
metals
of
sediment,
as
well
potential
interactions.
counts
lake
surface
varied
from
840
nkg−1
to
4020
13
nL−1
89
nL−1,
respectively.
Lake
exhibited
spatial
heterogeneity,
with
greatest
observed
eastern
northeastern
areas
near
inlets.
Grain
size
land
use
appear
collectively
modulate
variability
sediments.
Five
main
types
were
identified:
beads/pellets,
fragments,
fibres,
foams,
films,
beads
being
predominant
type.
Polypropylene,
polyethylene,
polystyrene
are
dominant
constituents
MPs,
domestic
sewage
suggested
source
for
lake.
Furthermore,
factor
indicated
high
level
lead
sediments,
while
copper
cobalt
showed
moderate
inlet.
SEM-EDS
analysis
illustrated
presence
toxic
elements
such
Hg,
Zn,
Pb,
Cr,
Cd,
Ni,
Cu
MPs.
This
expands
baseline
characterization
enhances
our
understanding
sources
influencing
MP
distribution.
