Membranes,
Год журнала:
2022,
Номер
12(5), С. 500 - 500
Опубликована: Май 6, 2022
In
today’s
world,
the
problem
of
“white
pollution”
is
becoming
more
and
serious,
many
countries
have
paid
special
attention
to
this
problem,
it
has
become
one
most
important
tasks
reduce
polymer
waste
protect
environment.
Due
degradability,
safety,
economy
practicality
biodegradable
packaging
film
materials,
materials
a
major
trend
in
industry
replace
traditional
provided
that
performance
requirements
are
met.
This
paper
reviews
degradation
mechanisms
characteristics
such
as
photodegradation,
hydrodegradation,
thermo-oxidative
biodegradation,
focuses
on
research
progress
modification
summarizes
some
challenges
bottlenecks
current
materials.
Environmental Chemistry Letters,
Год журнала:
2023,
Номер
21(3), С. 1761 - 1786
Опубликована: Янв. 25, 2023
Global
pollution
by
plastics
derived
from
petroleum
has
fostered
the
development
of
carbon–neutral,
biodegradable
bioplastics
synthesized
renewable
resources
such
as
modern
biomass,
yet
knowledge
on
impact
ecosystems
is
limited.
Here
we
review
polylactic
acid
plastic
with
focus
synthesis,
biodegradability
tuning,
environmental
conversion
to
microplastics,
and
microbes,
algae,
phytoplankton,
zooplankton,
annelids,
mollusk
fish.
Polylactic
a
low
weight
semi-crystalline
bioplastic
used
in
agriculture,
medicine,
packaging
textile.
one
most
widely
biopolymers,
accounting
for
33%
all
produced
2021.
Although
vivo,
not
completely
degradable
under
natural
conditions,
notably
aquatic
conditions.
disintegrates
into
microplastics
faster
than
petroleum-based
may
pose
severe
threats
exposed
biota.
Polymers,
Год журнала:
2023,
Номер
15(5), С. 1196 - 1196
Опубликована: Фев. 27, 2023
Poly(lactic
acid)
(PLA)
is
considered
the
most
promising
biobased
substitute
for
fossil-derived
polymers
due
to
its
compostability,
biocompatibility,
renewability,
and
good
thermomechanical
properties.
However,
PLA
suffers
from
several
shortcomings,
such
as
low
heat
distortion
temperature,
thermal
resistance,
rate
of
crystallization,
whereas
some
other
specific
properties,
i.e.,
flame
retardancy,
anti-UV,
antibacterial
or
barrier
antistatic
conductive
electrical
characteristics,
etc.,
are
required
by
different
end-use
sectors.
The
addition
nanofillers
represents
an
attractive
way
develop
enhance
properties
neat
PLA.
Numerous
with
architectures
have
been
investigated,
satisfactory
achievements,
in
design
nanocomposites.
This
review
paper
overviews
current
advances
synthetic
routes
nanocomposites,
imparted
each
nano-additive,
well
numerous
applications
nanocomposites
various
industrial
fields.
Environmental Science & Technology,
Год журнала:
2023,
Номер
57(2), С. 1167 - 1176
Опубликована: Янв. 4, 2023
Microplastics
are
readily
accumulated
in
coastal
sediments,
where
active
sulfur
(S)
cycling
takes
place.
However,
the
effects
of
microplastics
on
S
sediments
and
their
underlying
mechanisms
remain
poorly
understood.
In
this
study,
transformation
patterns
different
species
mangrove
amended
with
associated
microbial
communities
were
investigated
using
stable
isotopic
analysis
metagenomic
sequencing.
Biodegradable
poly(lactic
acid)
(PLA)
treatment
increased
sulfate
(SO42–)
reduction
to
yield
more
acid-volatile
elementary
S,
which
subsequently
transformed
chromium-reducible
(CRS).
The
isotope
fractionation
between
SO42–
CRS
PLA
by
9.1‰
from
days
0
20,
was
greater
than
6.8‰
control.
contrast,
recalcitrant
petroleum-based
poly(ethylene
terephthalate)
(PET)
polyvinyl
chloride
(PVC)
had
less
impact
reduction,
resulting
7.6
7.7‰
respectively.
pronounced
relative
abundance
Desulfovibrio-related
sulfate-reducing
bacteria,
contributed
a
large
proportion
genes
responsible
for
dissimilatory
reduction.
Overall,
these
findings
provide
insights
into
potential
impacts
exposure
biogeochemical
cycle
sediments.
Journal of Environmental Management,
Год журнала:
2023,
Номер
338, С. 117803 - 117803
Опубликована: Апрель 5, 2023
Freshwater
rivers
play
the
key
role
in
providing
drinking
water
sources
and
building
bridge
of
oceans
lands.
Hence,
environmental
pollutants
can
be
transferred
into
through
a
treatment
process
transported
land-based
microplastics
ocean.
Microplastics
are
considered
new
pollutant
that
is
becoming
threat
to
freshwater
ecosystems.
The
present
study
investigated
temporal
spatial
variation
abundance
their
characteristics
occurrence
surface
water,
sediment
soil
samples
Baotou
section
Yellow
River
China
March
2021
September
2021.
According
LDIR
analysis,
average
abundances
wet
season
(surface
2510.83
±
2971.27n/L,
6166.67
2914.56n/kg)
were
higher
than
dry
season(surface
432.5
240.54n/L,
3766.67
1625.63n/kg),
particularly
being
significant
difference
seasons
water.
predominant
polymer
types
(PBS
PET
during
season,
PP
season)
demonstrated
could
attributed
combined
effect
regional
precipitation,
fishing
activities
improper
disposal
plastic
waste.
And
results
showed
was
river
south
side
other
sampling
sites,
revealing
differences
burden
at
different
sites.
Moreover,
it
worth
noting
large
amount
PAM
detected
sediments
soil,
but
not
biodegradable
plastics
PBS
PLA
also
River.
It
very
useful
information
for
evaluating
impacts
ecological
effects
degradable
compared
traditional
after
implementation
policy
future.
Thus,
this
provided
insights
temporal-spatial
an
urban
raised
management
awareness
long-term
safety
by
microplastics.
