Ecotoxicology and Environmental Safety,
Journal Year:
2024,
Volume and Issue:
272, P. 116006 - 116006
Published: Jan. 31, 2024
Due
to
microplastics
(MPs)
being
widely
distributed
in
soil,
the
use
of
advanced
oxidation
remediate
organic-contaminated
soils
may
accelerate
aging
MPs
soil
and
impact
release
di-(2-ethylhexyl)
phthalate
(DEHP),
a
potential
carcinogen
used
as
plasticizer
plastics,
from
MPs.
In
this
study,
persulfate
(PO)
temperature
treatment
(TT)
were
treat
biodegradable
petroleum-based
MPs,
including
polylactic
acid
(PLA),
polyvinyl
chloride
(PVC),
polystyrene
(PS).
The
methods
for
evaluating
characteristics
changes
MP
X-ray
diffraction
(XRD)
analysis
water
contact
angle
measurement.
effects
on
DEHP
investigated
via
incubation.
results
showed
PO
TT
led
increased
surface
roughness,
oxygen-containing
functional
group
content,
hydrophilicity
with
prolonged
aging,
consequently
accelerating
Interestingly,
PLA
aged
faster
than
PVC
PS
under
similar
conditions.
After
30
days
treatment,
into
0.789-fold,
exceeding
increase
(0.454-fold)
(0.287-fold).
This
suggests
that
poses
higher
ecological
risk
or
PS.
Furthermore,
resulted
degradation
surface.
content
PLA,
PVC,
decreased
by
19.1%,
25.8%,
23.5%,
respectively.
Specifying
types
studied
environmental
conditions
would
provide
more
precise
context
results.
These
findings
novel
insights
fate
ecotoxicity
arising
remediation
contaminated
soils.
Photochemical & Photobiological Sciences,
Journal Year:
2024,
Volume and Issue:
23(4), P. 629 - 650
Published: March 21, 2024
Abstract
This
Assessment
Update
by
the
Environmental
Effects
Panel
(EEAP)
of
United
Nations
Environment
Programme
(UNEP)
considers
interactive
effects
solar
UV
radiation,
global
warming,
and
other
weathering
factors
on
plastics.
The
illustrates
significance
radiation
in
decreasing
durability
plastic
materials,
degradation
debris,
formation
micro-
nanoplastic
particles
accompanying
leaching
potential
toxic
compounds.
Micro-
nanoplastics
have
been
found
all
ecosystems,
atmosphere,
humans.
While
biological
risks
are
not
yet
well-established,
widespread
increasing
occurrence
pollution
is
reason
for
continuing
research
monitoring.
Plastic
debris
persists
after
its
intended
life
soils,
water
bodies
atmosphere
as
well
living
organisms.
To
counteract
accumulation
plastics
environment,
lifetime
novel
or
alternatives
should
better
match
functional
products,
with
eventual
breakdown
releasing
harmless
substances
to
environment.
Environmental Processes,
Journal Year:
2024,
Volume and Issue:
11(1)
Published: March 1, 2024
Abstract
Microplastics
research
in
South
Africa
has
focused
on
marine
and
coastal
areas,
with
limited
studies
reporting
microplastics
freshwaters.
To
address
this
gap,
we
conducted
study
to
investigate
the
presence,
abundance,
physical
characteristics,
chemical
composition
of
surface
water
Vaal
River,
one
most
important
freshwater
systems
Africa.
Twenty-two
samples
were
collected
along
60
km
middle
part
river
using
a
55
μm
plankton
net.
Samples
treated
by
acid
digestion,
MPs
separated
density
separation.
Physical
identification
was
performed
Nikon
stereomicroscope,
identified
Raman
spectroscopy.
observed
all
0.13
2.52
particles/m
3
concentrations.
ranged
size
from
0.06
–
4.95
mm,
more
than
89%
less
2
81%
fragments
(39%)
fibers
(42%).
numerous
colours,
which
green,
black,
blue
dominant,
representing
22%,
19%,
18%,
respectively.
Chemical
analysis
revealed
polymer
types
as
high-density
polyethylene
(HDPE),
polypropylene
(PP),
low-density
(LDPE).
In
addition,
two
colourants,
pigment
yellow
83
carbon
detected.
This
provides
new
data
microplastic
occurrence
characteristics
River
system
offers
baseline
for
future
monitoring.
Our
findings
confirm
that
is
under
real
threat
contamination,
could
impact
its
role
significant
Highlights
•
prevalent
River.
Fibrous,
small-sized,
coloured
abundant.
Polymers
HDPE,
LDPE,
PP.
The
environmental
and
health
challenges
posed
by
petroleum-based
biodegradable
plastics,
such
as
polybutylene
succinate
(PBS)
polybutyleneadipate-co-terephthalate
(PBAT),
are
a
significant
concern
because
they
increasingly
present
in
the
environment
contribute
substantial
proportion
of
microplastics
(MPs)
or
nanoplastics
(NPs).
In
this
study,
ultraviolet
(UV)-aged
PBS-NPs
PBAT-NPs
found
to
have
higher
propensity
accumulate
within
body
Caenorhabditis
elegans
(C.
elegans)
prolonging
defecation
interval,
which
could
induce
severe
neuronal
damage
compared
pristine
NPs.
increased
accumulation
(BNPs)
subsequent
impairments
neurobehavior
highly
attributed
their
reduced
particle
size
altered
surface
properties,
including
changed
chemical
bonds
functional
groups
after
photoaging.
Aged
BNPs
also
cause
more
GABAergic
neurons
neurotransmitter
receptors,
resulting
disrupted
homeostasis
behaviors.
Overall,
both
PBS
PBAT
components
show
no
differences
biological
mechanisms
neural
damage,
highlighting
commonalities
characteristics
adverse
effects
on
nervous
system.
Our
study
opens
up
exploration
impacts
photoaging
degradation
state
that
environment.
