Frontiers in Bioengineering and Biotechnology,
Год журнала:
2024,
Номер
12
Опубликована: Дек. 12, 2024
Polyethylene
(PE)
is
the
most-produced
polyolefin,
and
consequently,
it
most
widely
found
plastic
waste
worldwide.
PE
biodegradation
under
study
by
applying
different
(micro)organisms
in
order
to
understand
biodegradative
mechanism
majority
of
microbes.
This
aims
identify
novel
bacterial
species
with
compelling
metabolic
potential
strategic
genetic
repertoires
for
biodegradation.
Pseudomonas
citronellolis
E5
newly
isolated
from
solid
organic
contaminated
debris,
Rhodococcus
erythropolis
D4
was
selected
its
promising
biodegradable
determined
repertoire.
P.
ability
grow
on
as
only
carbon
energy
source.
Meaningful
extracellular
secreted
laccase
activity
also
characterized
during
growth
(E5
strains
have
a
(2
±
1)×10
–3
U
mg
−1
(3
,
respectively).
Despite
highest
level
cell
numbers
recorded
at
7
days
both
strains,
patterns
products
obtained
degraded
60
were
dissimilar
two
bacteria
sampling
times.
However,
they
mainly
produced
metabolites
belonging
carboxylic
acids
alkanes
varying
carbons
aliphatic
chains.
Whole-genome
sequence
analyses
compared
R
.
determinant
prediction
(by
gene
annotation
multiple
alignment
reference
products)
been
performed,
providing
list
16
42
putatively
related
steps
Altogether,
these
results
support
insights
into
genera
perspectives
base
build
up
biotechnological
platforms.
International Journal of Biological Macromolecules,
Год журнала:
2024,
Номер
268, С. 131731 - 131731
Опубликована: Апрель 21, 2024
In
this
work
we
have
characterized
and
compared
chitin
sourced
from
exoskeleton
of
Tenebrio
molitor
larvae
fed
with
polystyrene
or
plastic
kitchen
wrap
combined
bran
in
the
ratio
1:
1
only
bran.
Analysis
frass
by
ATR-FTIR
showed
very
similar
spectra
confirmed
degradation
feed
components,
while
analysis
verified
absence
any
residue.
Deproteinization
followed
demineralization
produced
6.78-5.29
%
chitin,
showing
that
(polystyrene
wrap)
diet
resulted
heavier
insect
exoskeleton,
but
yielded
slightly
less
lowest
value
obtained
for
diet.
The
deacetylation
degree
98.17-98.61
was
determined
measured
spectra.
XRD
presence
α-chitin
a
crystallinity
index
66.5-62
crystallite
size
4-5
nm.
Thermogravimetric
curves
all
samples,
two
steps.
These
results
show
T.
contributing
to
significant
biodegradation
major
polluting
materials
can
be
feasible
alternative
source
further
promoting
bio-circular
economy.
Frontiers in Microbiology,
Год журнала:
2025,
Номер
15
Опубликована: Янв. 7, 2025
The
increasing
use
of
plastics
globally
has
generated
serious
environmental
and
human
health
problems,
particularly
in
the
agricultural
sector
where
low-density
polyethylene
(LDPE)
other
are
widely
used.
Due
to
its
low
recycling
rate
slow
degradation
process,
LDPE
is
a
major
source
pollution.
This
paper
addresses
problem
plastic
accumulation
agriculture,
focusing
on
biodegradation
strategies.
studies
reviewed
include
recent
data
methodologies
used
state-of-the-art
technologies
others
that
have
been
for
decades,
monitor
measure
degree
each
treatment
applied
can
have,
including
SEM,
GCMS,
HPLC,
microscopy.
countries
investigating
these
identified,
while
some
developing
them
years,
only
begun
address
this
years.
microorganisms
such
as
bacteria,
fungi,
algae,
insect
larvae
influence
decomposition
highlighted.
A
workflow
proposed
carry
out
type
research.
Despite
advances,
challenges
remain,
optimizing
conditions
accelerate
process
need
further
research
delves
into
microbial
interactions
various
contexts.
Sustainability,
Год журнала:
2025,
Номер
17(7), С. 2874 - 2874
Опубликована: Март 24, 2025
The
objective
of
this
study
was
to
address
the
limitations
biodegradable
plastics—low
economic
benefits
and
marketing
difficulties.
To
end,
analyzed
production
processes
two
plastics:
polylactic
acid
(PLA)
polybutylene
adipate
terephthalate
(PBAT).
Based
on
analysis,
economic,
technical,
environmental
improvement
indicators
were
constructed,
an
optimization
model
with
three
objectives
profit,
carbon
emission
cost,
process
risk
established.
In
study,
we
embedded
improved
NSGA-III
algorithm
obtain
Pareto
optimal
solution
set.
We
also
proposed
entropy-weighted
efficiency
index
(EWEI)
for
analysis
transport
advantages
based
distribution
plastics
production,
road
density,
regional
prices.
With
a
line
capacity
10,000
tons
8%
discount
rate,
10-year
return
PBAT
products
7,039,931.23
yuan
higher
than
that
PLA
products.
profit
488.92
per
ton
production.
However,
exhibited
carbon-emission
cost
products,
especially
risk,
by
0.11%.
East
China
region
has
obvious
geographical
advantages,
but
Southwest
is
constrained
in
presence
mountainous
terrain.
Therefore,
it
imperative
optimize
China’s
overall
industrial
layout
plastics,
strengthen
acquisition
support
sustainable
promotion
market,
effectively
minimize
pollution
caused
traditional
plastics.
Polymers,
Год журнала:
2024,
Номер
16(16), С. 2249 - 2249
Опубликована: Авг. 8, 2024
Polyethylene
terephthalate
has
been
widely
used
in
the
packaging
industry.
Degraded
PET
micro(nano)plastics
could
pose
public
health
concerns
following
release
into
various
environments.
This
study
focuses
on
degradation
under
ultraviolet
radiation
using
NIST
SPHERE
facility
at
National
Institute
of
Standards
and
Technology
saturated
humidity
(i.e.,
≥95%
relative
humidity)
dry
conditions
≤5%
with
varying
temperatures
(30
°C,
40
50
°C)
for
up
20
days.
ATR-FTIR
was
to
characterize
chemical
composition
change
degraded
as
a
function
UV
exposure
time.
The
results
showed
that
cleavage
ester
bond
peak
1713
cm−1
formation
carboxylic
acid
1685
were
significantly
influenced
by
radiation.
Furthermore,
considerably
higher
°C
compared
conditions.
also
more
pronounced
novelty
this
is
provide
insights
environmental
conditions,
including
radiation,
humidity,
temperature.
can
be
develop
strategies
reduce
impact
plastic
pollution.
Research Square (Research Square),
Год журнала:
2024,
Номер
unknown
Опубликована: Май 22, 2024
Abstract
Polyethylene
terephthalate
has
been
widely
used
in
the
packaging
industry.
Degraded
PET
micro-nano
plastics
could
pose
public
health
concerns
following
release
into
various
environments.
This
study
focuses
on
degradation
under
ultraviolet
radiation
using
NIST
SPHERE
facility
at
National
Institute
of
Standards
and
Technology
saturated
humidity
(i.e.,
≥
95
%
relative
humidity)
dry
conditions
≤
5
with
varying
temperatures
(30
°C,
40
50
°C)
for
up
20
days.
ATR-FTIR
was
to
characterize
chemical
composition
change
degraded
as
a
function
UV
exposure
time.
The
results
showed
that
cleavage
ester
bond
peak
1713
cm-1
formation
carboxylic
acid
1685
are
significantly
influenced
by
radiation.
Furthermore,
considerably
higher
°C
compared
conditions.
also
more
pronounced
novelty
this
is
provide
insights
environmental
conditions,
including
radiation,
humidity,
temperature.
can
be
develop
strategies
reduce
impact
plastic
pollution.
Plastics
have
become
indispensable
in
modern
industries;
however,
their
resistance
to
natural
degradation
poses
environmental
challenges.
Biological
technologies
employing
microorganisms
offer
promising
solutions.
Here,
we
analyzed
the
transcriptome
and
proteome
of
Pseudomonas
aeruginosa,
a
plastic-degrading
microorganism
found
gut
superworms,
identify
genes
enzymes
upregulated
during
polyethylene
degradation.
Functional
analyses
these
using
Kyoto
Encyclopedia
Genes
Genomes
Gene
Ontology
databases
revealed
an
increase
lipid
hydrophobic
amino
acid
metabolism,
suggesting
involvement
Based
on
analyses,
identified
phenylalanine
monooxygenase,
which
is
capable
oxidizing
plastics,
isocitrate
lyase,
involved
C-C
bond
cleavage.
To
investigate
degradation,
phhA
aceA
were
transformed
into
Escherichia
coli,
produced
purified.
The
purified
then
reacted
with
analyzed.
results
formation
hydroxyl
(-OH)
C-O
groups
surface
after
treatment
confirming
its
ability
oxidize
polyethylene.
Isocitrate
lyase
alone
did
not
affect
production;
when
combined
it
contributed
reduction
molecular
weight.
This
suggests
two-stage
process
involving
oxidation
depolymerization
that
requires
sequential
action
multiple
enzymes.
Thus,
each
stage
demonstrated
