Environment International,
Journal Year:
2024,
Volume and Issue:
195, P. 109239 - 109239
Published: Dec. 25, 2024
Municipal
landfills
are
hotspot
sources
of
antimicrobial
resistance
(AMR)
and
also
important
habitats
contaminant-degrading
bacteria.
However,
high
diversity
antibiotic
genes
(ARGs)
in
hinders
assessing
AMR
risks
the
affected
environment.
More
concerned,
whether
there
is
co-selection
or
enrichment
antibiotic-resistant
bacteria
these
extremely
polluted
environments
far
less
understood.
Here,
we
collected
metagenomic
datasets
32
raw
leachate
45
solid
waste
samples
22
municipal
China.
The
resistome,
were
explored,
then
compared
with
other
environmental
types.
Results
showed
that
resistome
contained
1,403
ARG
subtypes,
total
abundance
over
levels
natural
reaching
human
feces
sewage.
Therein,
49
subtypes
listed
as
top
priority
ARGs
for
future
surveillance
based
on
criteria
landfills,
mobilizable
present
pathogens.
By
comparing
to
those
contaminated
river
environments,
elucidated
an
potentials
landfills.
Bacteria
Pseudomonadaceae,
Moraxellaceae,
Xanthomonadaceae
Enterobacteriaceae
deserved
most
concerns
since
72.2
%
hosts
classified
them.
Klebsiella
pneumoniae,
Acinetobacter
nosocomialis
Escherichia
coli
abundant
multidrug-resistant
pathogenic
species
(∼10.2
microbiomes),
but
they
rarely
carried
contaminant-degradation
genes.
Notably,
several
bacterial
genera
belonging
Pseudomonadaceae
had
antibiotic-resistant,
pathogenic,
than
Overall,
findings
highlight
selection
pathogens,
provide
significant
insights
into
Molecules,
Journal Year:
2024,
Volume and Issue:
29(2), P. 387 - 387
Published: Jan. 12, 2024
In
2021,
global
plastics
production
was
390.7
Mt;
in
2022,
it
400.3
Mt,
showing
an
increase
of
2.4%,
and
this
rising
tendency
will
yearly.
Of
data,
less
than
2%
correspond
to
bio-based
plastics.
Currently,
polymers,
including
elastomers,
are
non-recyclable
come
from
non-renewable
sources.
Additionally,
most
elastomers
thermosets,
making
them
complex
recycle
reuse.
It
takes
hundreds
thousands
years
decompose
or
biodegrade,
contributing
plastic
waste
accumulation,
nano
microplastic
formation,
environmental
pollution.
Due
this,
the
synthesis
natural
renewable
resources
has
attracted
attention
researchers
industries.
review
paper,
new
methods
strategies
proposed
for
preparation
elastomers.
The
main
goals
advances
improvements
synthesis,
properties,
applications
industrial
rubbers,
polyurethanes,
polyesters,
polyethers,
approach
their
circular
economy
sustainability.
Olefin
metathesis
is
as
a
novel
sustainable
method
which
allows
depolymerization
degradation
rubbers
with
use
essential
oils,
terpenes,
fatty
acids,
alcohols
such
chain
transfer
agents
(CTA)
donors
terminal
groups
chain,
allow
control
molecular
weights
functional
groups,
obtaining
compounds,
oligomers,
added
value
application
polymers
materials.
This
contributes
development
that
can
reduce
carbon
emissions,
avoid
cross-contamination
fossil
fuels,
obtain
greener
material
biodegradable
and/or
compostable
behavior.
Heliyon,
Journal Year:
2023,
Volume and Issue:
9(11), P. e21374 - e21374
Published: Oct. 22, 2023
Nowadays,
the
tendency
to
replace
conventional
fossil-based
plastics
is
increasing
considerably;
there
a
growing
trend
towards
alternatives
that
involve
development
of
plastic
materials
derived
from
renewable
sources,
which
are
compostable
and
biodegradable.
Indeed,
only
1.5
%
whole
production
part
small
bioplastics
market,
even
when
these
with
partial
or
full
composition
biomass
rapidly
expanding.
A
very
interesting
field
investigation
currently
being
developed
in
disposal
processing
final
products
evaluated
terms
reducing
environmental
harm.
This
review
presents
compilation
polyethylene
(PE)
types,
their
uses,
current
problems
waste
management
PE
recycling.
Particularly,
this
based
on
capabilities
synthesize
bio-based
natural
sources
as
replacement
for
raw
material
petroleum.
In
addition
recent
studies
degradation
different
types
weight
loss
ranges
1
47
%,
techniques
used
main
changes
observed
after
degradation.
Finally,
perspectives
presented
manuscript
about
non-renewable
polymers,
depending
non-degradable,
biodegradable,
behavior,
including
composting
PE.
addition,
it
contributes
3R
approaches
responsible
advancement
an
environmentally
friendly
Polymers,
Journal Year:
2025,
Volume and Issue:
17(2), P. 169 - 169
Published: Jan. 11, 2025
This
study
attempted
to
isolate
and
identify
pedospheric
microbes
originating
in
dumpsites
utilized
them
for
the
degradation
of
selected
synthetic
polymers
first
time
a
cost-effective,
ecologically
favorable
sustainable
manner.
Specifically,
low-density
polyethylene
(LDPE)
polyurethane
(PUR)
were
converted
by
isolated
fungi,
i.e.,
Aspergillus
flavus,
A
terreus,
A.
clavatus,
nigers
bacterial
coccus
filamentous
assessed
biotransformative
assay
under
simulated
conditions.
Commendable
biodegradative
potentials
exhibited
against
that
analyzed
over
span
30
days.
Among
fungal
microbes,
highest
activity
was
achieved
niger,
expressing
55%
40%
conversion
LDPE
PUR,
respectively.
In
case
strains,
50%
PUR
coccus.
Fourier
transform
infrared
spectroscopy
(FT-IR)
thermogravimetric
analysis
(TGA)
analyze
degradative
patterns
terms
vibrational
thermal
characteristics,
stereomicroscopic
performed
visual
assessment
morphological
variations.
Profound
structural
transformations
detected
FT-IR
spectra
TGA
thermograms
microbes.
Stereomicroscopic
also
indicative
remarkable
transformation
surface
morphology
these
after
comparison
reference
samples
not
treated
with
any
The
results
are
supportive
utilization
as
environmental
remediators
cleanup
persistent
polymeric
toxins.
current
work
can
be
further
extended
successful
optimization
augmented
percentages
using
other
adoption
biotechnological
tools
at
practical
level.
Journal of Hazardous Materials,
Journal Year:
2025,
Volume and Issue:
490, P. 137806 - 137806
Published: March 3, 2025
The
persistence
of
plastics,
particularly
polypropylene
(PP),
and
their
conversion
into
microplastics
(MPs),
specifically
PP-MPs,
have
emerged
as
serious
ecological
threats
to
soil
aquatic
environments.
In
the
present
study,
we
aimed
isolate
a
microbial
consortium
capable
degrading
PP-MPs.
results
revealed
that
three
consortia
(CPP-KKU1,
CPP-KKU2,
CPP-KKU3)
exhibited
ability
degrade
achieving
weight
losses
ranging
from
11.6
±
0.2
%
17.8
0.5
after
30
days.
Fourier
transform
infrared
(FTIR)
spectroscopy
analysis
confirmed
degradation
through
oxidation,
evidenced
by
presence
new
functional
groups
(-OH
-C=O).
particular,
CPP-KKU3
showed
highest
efficiency,
with
scanning
electron
microscopy
(SEM)
revealing
surface
cracking
treatment.
Additionally,
gas
chromatography-mass
spectrometry
(GC-MS)
identified
various
intermediate
compounds,
including
heterocyclic
aromatic
phenyl
groups,
methylthio
derivatives,
ethoxycarbonyl
indicating
complex
biochemical
processes
were
likely
mediated
enzymes.
Furthermore,
polyhydroxybutyrate
(PHB)
production
these
was
also
investigated.
result
both
CPP-KKU2
successfully
produced
PHB,
demonstrating
superior
performance
in
terms
PP-MP
PHB
production.
Metagenomic
abundant
carbohydrate-active
enzymes
(CAZymes),
glycosyl
transferases
glycoside
hydrolases,
which
are
associated
MP
digestion.
This
study
presents
promising
bioremediation
approach
addresses
plastic
waste
sustainable
bioplastic
production,
offering
potential
solution
for
environmental
pollution.
