Environment International,
Год журнала:
2024,
Номер
195, С. 109239 - 109239
Опубликована: Дек. 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
The Science of The Total Environment,
Год журнала:
2023,
Номер
908, С. 168329 - 168329
Опубликована: Ноя. 4, 2023
Dealing
with
plastic
waste
in
an
environmentally
friendly
and
effective
manner
has
been
a
conundrum
that
much
research
attempted
to
address.
An
attractive
approach
is
biodegradation
by
microorganisms;
however
microorganisms
have
shown
such
potential
are
generally
only
able
degrade
surface
layers
of
polymer
materials.
Herein
we
describe
the
multi-stage
degradation
commercial
bulk
polyurethane
two
strains
fungi
isolated
from
landfill.
Moreover,
demonstrate
mechanisms
not
hydrolysis
alone
as
usually
reported,
but
decarboxylation
well.
The
data
presented
here
suggest
chain
scission
at
urethane
groups
involves
terminal
functional
release
CO2.
Two
strains,
Clonostachys
sp.
PB54
Purpureocillium
PB57
were
both
decrease
mass
40
%
after
90
days.
Spectroscopic
analysis
revealed
breakage
ester
linkages
also
detected
variations
hydrogen
bonding
over
time,
indicating
initial
amorphous
regions
followed
destabilization
more
ordered,
crystalline
layers.
Subsequent
Liquid
Chromatography
Mass
Spectrometry
(LCMS)
demonstrated
capable
liberating
monomer-equivalent
molecules
(4,4'-methylenedianiline)
material.
In
this
work,
these
be
significantly
degrading
short
period
producing
small
organic
CO2,
such,
good
prospects
for
development
large-scale
processing.
Environment International,
Год журнала:
2024,
Номер
195, С. 109239 - 109239
Опубликована: Дек. 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
