International Journal of Molecular Sciences,
Journal Year:
2024,
Volume and Issue:
25(1), P. 593 - 593
Published: Jan. 2, 2024
Plastic
production
has
increased
dramatically,
leading
to
accumulated
plastic
waste
in
the
ocean.
Marine
plastics
can
be
broken
down
into
microplastics
(<5
mm)
by
sunlight,
machinery,
and
pressure.
The
accumulation
of
organisms
release
additives
adversely
affect
health
marine
organisms.
Biodegradation
is
one
way
address
pollution
an
environmentally
friendly
manner.
microorganisms
more
adapted
fluctuating
environmental
conditions
such
as
salinity,
temperature,
pH,
pressure
compared
with
terrestrial
microorganisms,
providing
new
opportunities
pollution.
Pseudomonadota
(Proteobacteria),
Bacteroidota
(Bacteroidetes),
Bacillota
(Firmicutes),
Cyanobacteria
were
frequently
found
on
biofilms
may
degrade
plastics.
Currently,
diverse
plastic-degrading
bacteria
are
being
isolated
from
environments
offshore
deep
oceanic
waters,
especially
Pseudomonas
spp.
Bacillus
Alcanivoras
Actinomycetes.
Some
fungi
algae
have
also
been
revealed
degraders.
In
this
review,
we
focused
advances
biodegradation
their
enzymes
(esterase,
cutinase,
laccase,
etc.)
involved
process
polyethylene
terephthalate
(PET),
polystyrene
(PS),
(PE),
polyvinyl
chloride
(PVC),
polypropylene
(PP)
highlighted
need
study
sea.
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(15), P. 6647 - 6658
Published: April 2, 2024
The
biodegradation
of
polypropylene
(PP),
a
highly
persistent
nonhydrolyzable
polymer,
by
Tenebrio
molitor
has
been
confirmed
using
commercial
PP
microplastics
(MPs)
(Mn
26.59
and
Mw
187.12
kDa).
This
confirmation
was
based
on
the
reduction
mass,
change
in
molecular
weight
(MW),
positive
Δδ13C
residual
PP.
A
MW-dependent
mechanism
investigated
five
high-purity
MPs,
classified
into
low
(0.83
6.20
kDa),
medium
(50.40
108.0
high
(575.0
kDa)
MW
categories
to
access
impact
depolymerization
pattern
associated
gene
expression
gut
bacteria
larval
host.
larvae
can
depolymerize/biodegrade
polymers
with
although
consumption
rate
losses
increased,
survival
rates
declined
increasing
MW.
is
similar
observations
polystyrene
(PS)
polyethylene
(PE),
i.e.,
both
Mn
decreased
after
being
fed
PP,
while
and/or
increased
fed.
microbiota
exhibited
specific
associations,
such
as
Kluyvera
sp.
Pediococcus
for
degradation,
Acinetobacter
Bacillus
alongside
three
other
metabolism.
In
host
transcriptome,
digestive
enzymes
plastic
degradation-related
bacterial
were
up-regulated
feeding
depending
different
MWs.
T.
defensive
function
degradation
capability
during
plastics,
showing
relatively
negative
larvae.
Frontiers of Environmental Science & Engineering,
Journal Year:
2024,
Volume and Issue:
18(6)
Published: April 30, 2024
Abstract
Insects
damaging
and
penetrating
plastic
packaged
materials
has
been
reported
since
the
1950s.
Radical
innovation
breakthroughs
of
biodegradation
have
initiated
discovery
plastics
by
Tenebrio
molitor
larvae
in
2015
followed
Galleria
mellonella
2017.
Here
we
review
updated
studies
on
insect-mediated
plastics.
Plastic
insect
larvae,
mainly
some
species
darkling
beetles
(Tenebrionidae)
pyralid
moths
(Pyralidae)
is
currently
a
highly
active
potentially
transformative
area
research.
Over
past
eight
years,
publications
increased
explosively,
including
discoveries
ability
different
to
biodegrade
plastics,
performance,
contribution
host
microbiomes,
impacts
polymer
types
their
physic-chemical
properties,
responsible
enzymes
secreted
gut
microbes.
To
date,
almost
all
major
polyethylene
(PE),
polypropylene
(PP),
polyvinyl
chloride
(PVC),
terephthalate
(PET),
polyurethane
(PUR),
polystyrene
(PS)
can
be
biodegraded
T.
ten
other
representing
Tenebrionidae
Pyralidae
families.
The
processes
are
symbiotic
reactions
or
performed
synergistic
efforts
both
gut-microbes
rapidly
depolymerize
with
hourly
half-lives.
digestive
ezymens
bioreagents
screted
insects
play
an
essential
role
plasatic
certain
New
research
itself,
transcriptomes,
proteomes
metabolomes
evaluated
mechanisms
insects.
We
conclude
this
discussing
future
perspectives
Water,
Journal Year:
2024,
Volume and Issue:
16(7), P. 1043 - 1043
Published: April 4, 2024
With
ongoing
climate
change,
new
threats
appear
to
the
operation
of
water
supply
systems
(WSSs),
which
are
related
amount
available
drinking
resources,
its
quality,
existing
infrastructure
and
changes
in
consumer
behavior.
The
paper
presents
a
bibliometric
analysis
state
knowledge
on
impact
change
failure
infrastructure.
was
performed
based
VOSviewer
program.
results
indicate
current
research
trends
this
area
around
world
allow
identification
strengths
weaknesses.
Most
concerns
factors
rate
distribution
systems.
A
popular
topic
also
prediction
network
failures,
taking
into
account
climatic
factors.
main
gap
is
determining
quality.
acquired
can
be
used
by
companies,
policy-makers
other
researchers
plan
adaptation
strategies
pose
challenges
for
conducted
allowed
identifying
gaps.
Journal of Cleaner Production,
Journal Year:
2024,
Volume and Issue:
443, P. 141025 - 141025
Published: Feb. 8, 2024
Ubiquitous
post-consumer
plastic
waste
is
often
physically
mixed
combining
recalcitrant
petroleum-based
plastics
with
bioplastics,
forming
(petro-bio)plastic
streams.
Finding
appropriate
end-of-life
(EoL)
strategies
for
highly
pertinent
in
achieving
environmental
protection,
sustainability
value
chain
industries
including
recyclers
and
government
policy
makers
worldwide.
The
presence
of
bioplastic
polyethylene
terephthalate
(PET)
or
other
streams
poses
a
substantial
drawback
to
mechanical
recycling
strongly
impedes
the
development
sustainable
EoL
routes.
Here,
we
present
model
system
management
waste,
demonstrating
biotechnological
route
through
synergy-promoted
enzymatic
degradation
PET–representing
petrochemical
polyester
plastic–mixed
thermoplastic
starch
(TPS)–as
bioplastic.
Leaf-branch
compost
cutinase
(LCCICCG)
commercial
amylase
(AMY)
deliver
effective
depolymerization
this
material,
subsequent
bio-upcycling
stream
into
bacterial
nanocellulose
(BNC)
by
Komagataeibacter
medellinensis.
Compared
LCCICCG
AMY,
LCCICCG/AMY
combined
treatment
synergistically
produced
2.6-
4.4-fold
increase
decomposition
at
70
°C
four
days,
respectively,
yielding
sugars
terephthalic
acid
(TPA)
as
main
building
blocks.
Bio-upcycling
post-enzymatic
hydrolysates
resulted
high
BNC
yield
3
g
L−1
after
10
days.
This
work
paves
way
routes
challenging
prepares
opportunities
its
participation
circular
production
eco-polymers.
