Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(2), P. 1312 - 1320
Published: Jan. 4, 2024
Sunlight
irradiation
is
the
predominant
process
for
degrading
plastics
in
environment,
but
our
current
understanding
of
degradation
smaller,
submicron
(<1000
nm)
particles
limited
due
to
prior
analytical
constraints.
We
used
infrared
photothermal
heterodyne
imaging
(IR-PHI)
simultaneously
analyze
chemical
and
morphological
changes
single
polystyrene
(PS)
(∼1000
when
exposed
ultraviolet
(UV)
(λ
=
250–400
nm).
Within
6
h
irradiation,
bands
associated
with
backbone
PS
decreased,
accompanied
by
a
reduction
particle
size.
Concurrently,
formation
several
spectral
features
photooxidation
was
attributed
ketones,
carboxylic
acids,
aldehydes,
esters,
lactones.
Spectral
outcomes
were
present
an
updated
reaction
scheme
photodegradation
PS.
After
36
h,
average
size
reduced
478
±
158
nm.
The
rates
decrease
carbonyl
band
area
increase
−24
3.0
nm
h–1
2.1
0.6
cm–1
h–1,
respectively.
Using
size-related
rate,
we
estimated
that
under
peak
terrestrial
sunlight
conditions,
it
would
take
less
than
500
1000
degrade
1
Environment International,
Journal Year:
2022,
Volume and Issue:
171, P. 107711 - 107711
Published: Dec. 21, 2022
Micro/nanoplastics
(MPs/NPs)
are
ubiquitous
in
the
environment
and
living
organisms
have
been
exposed
to
these
substances
for
a
long
time.
When
MPs/NPs
enter
different
organisms,
they
transport
various
pollutants,
including
heavy
metals,
persistent
organic
drugs,
bacteria,
viruses,
from
environment.
On
this
basis,
paper
summarizes
combined
toxicity
induced
by
accumulating
contaminants
entering
through
systematic
review
of
162
articles.
Moreover,
factors
influencing
toxic
interactions
critically
discussed,
thus
highlighting
dominant
role
relative
concentrations
effects.
Furthermore,
first
time,
we
describe
threats
posed
with
other
pollutants
human
health,
as
well
their
cytotoxic
behavior
mechanism.
We
found
that
"Trojan
horse"
effect
nanoplastics
can
increase
bioaccessibility
environmental
increasing
carcinogenic
risk
humans.
Simultaneously,
complex
cells
observed
be
constantly
dissociated
due
lysosomes.
However,
current
research
on
intracellular
release
MP/NP-loaded
is
relatively
poor,
which
hinders
accurate
vivo
assessment
pollutants.
Based
findings
our
critical
review,
recommend
analyzing
effects
clarifying
dose
relationship
each
component
pollutant
cells,
challenging
yet
crucial
exploring
mechanism
pollution.
In
future,
contribute
establishing
system
modeling
complete
load-translocation
toxicological
MP/NP-based
composite
Biological Conservation,
Journal Year:
2022,
Volume and Issue:
272, P. 109655 - 109655
Published: July 4, 2022
Pollution
of
the
environment
with
plastics
has
garnered
significant
public
attention,
but
topic
also
been
focus
controversy,
including
assertions
that
resources
are
better
spent
on
other
topics,
such
as
global
warming.
Here,
we
argue
plastic
pollution
and
climate
change
fundamentally
linked,
from
extraction
fossil
fuels
to
production
plastics,
eventual
disposal.
We
demonstrate
how
research
funding
currently
lag
significantly
behind
conclude
by
advocating
for
a
more
integrated
approach
addressing
pressing
conservation
issues
in
time
planetary
emergency.
