Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: March 12, 2024
Aeration
is
an
important
factor
to
regulate
composting
efficiency
and
nitrogen
loss.
This
study
aimed
compare
the
effects
of
different
aeration
modes
(continuous
intermittent)
rate
on
conversion
bacterial
community
in
from
dehydrated
sludge
corn
straw.
Results
showed
that
intermittent
mode
at
same
volume
was
superior
continuous
terms
NH
3
emission
reduction,
germination
index
(GI)
improvement.
Intermittent
with
1200
L/h
(aeration
5
min,
stop
15
min)
[K5T15
(V1200)]
300
helped
conservation
fractions
accelerate
process.
However,
it
most
advantageous
use
150
reduce
ensure
effective
The
K5T15
(V1200)
fastest
temperature
rise,
longer
duration
thermophilic
stage
highest
GI
(95%)
composting.
cumulative
higher
than
mode.
V300
23.1%
lower
(V1200).
dominant
phyla
straw
were
Firmicutes,
Proteobacteria,
Actinobacteria,
Bacteroidetes.
phylum
Firmicutes
(49.39%~63.13%),
genus
Thermobifida
(18.62%~30.16%).
relative
abundance
greater
(63.13%)
(57.62%),
Pseudomonas
lowest
emission.
suggested
adjustment
could
affect
core
bacteria
loss
Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: April 10, 2024
The
complexity
of
crude
oil
composition,
combined
with
the
fluctuating
oxygen
level
in
contaminated
environments,
poses
challenges
for
bioremediation
pollutants,
because
compound-specific
microbial
degradation
petroleum
hydrocarbons
under
certain
conditions.
As
a
result,
facultative
bacteria
capable
breaking
down
both
aerobic
and
anaerobic
conditions
are
presumably
effective,
however,
this
hypothesis
has
not
been
directly
tested.
In
current
investigation,
Water Environment Research,
Journal Year:
2024,
Volume and Issue:
96(8)
Published: Aug. 1, 2024
Abstract
The
confined
groundwater
of
arid
sedimentary
plains
has
been
disturbed
by
long‐term
anthropogenic
extraction,
and
its
hydrochemical
quality
is
required
for
sustainable
development.
present
research
investigates
the
characteristics,
formation,
potential
health
threats,
suitability
in
central
North
China
Plain.
Results
show
that
a
slightly
alkaline
nature
study
area,
predominantly
dominated
fresh‐soft
Cl‐Na
HCO
3
‐Na
types.
Water
chemistry
governed
water–rock
interactions,
including
dissolution
evaporites
cation
exchange.
Approximately
97%
sampled
groundwaters
exceed
prescribed
standard
F
−
.
It
mainly
due
to
geological
factors
such
as
mineral
dissolution,
exchange,
competitive
adsorption
may
also
be
released
from
compacted
soils
because
extraction.
Enriched
can
pose
an
intermediate
higher
non‐carcinogenic
risk
more
than
90%
population.
poses
greatest
threat
population
north‐eastern
part
especially
infants
children.
For
development,
use
irrigation
area
should
avoided,
attention
paid
soil
salinization
infiltration
risks.
In
are
found
excellent
or
good
domestic
purposes
based
on
Entropy‐weighted
Quality
Index.
However,
caused
high
contents
cannot
ignored.
Therefore,
it
recommended
differential
water
supplies
implemented
according
spatial
heterogeneity
ensure
scientific
rational
resources.
Practitioner
Points
hydrochemistry
plain
extraction
was
investigated.
multiple
drinking
were
evaluated.
characteristics
formation
mechanism
under
influence
revealed.
Frontiers in Microbiology,
Journal Year:
2025,
Volume and Issue:
15
Published: Jan. 6, 2025
The
makeup
of
soil
microbial
communities
may
serve
as
a
crucial
predictor
the
alpine
grassland
ecosystem.
Climate
change
and
human
disturbance
have
resulted
in
intensified
ecosystem
degradation,
such
rocky
desertification,
which
modify
structures
composition
microorganisms.
However,
little
is
known
about
effects
desertification
on
soil.
Here,
we
investigated
five
different
layers
Qinghai-Tibet
Plateau,
including
nil
rock
(NRD);
potential
(PRD);
light
(LRD);
moderate
(MRD);
severe
(SRD),
compared
bacterial
community
with
physiochemical
properties
conditions.
result
showed
that
significantly
altered
but
did
not
affect
abundance
diversity.
At
same
time
increased,
organic
carbon
(SOC),
total
nitrogen
(TN),
alkali
hydrolyzable
(AN),
available
phosphorus
(AP),
potassium
(AK)
decreased
significantly,
while
pH,
(TP);
(TK)
increased.
Redundancy
analysis
revealed
AK,
TP,
SOC
are
key
factors
influencing
communities.
Our
finding
provides
basic
information
scientific
reference
for
restoration
grasslands.
It
has
been
widely
accepted
that
iron
plays
an
important
role
in
stimulating
the
activity
of
anammox
bacteria,
which
contain
many
clusters
for
electron
transport
cells.
However,
whether
bacteria
could
directly
use
and
how
to
uptake
Fe(III)
have
long-time
ignored.
Here,
we
found
micrometer-scale
magnetite
with
size
10–20
μm
significantly
promoted
bacterial
by
core
uptake.
Anammox
cannot
utilize
as
they
are
unable
secrete
siderophore
extracellular
transfer
intracellular.
In
anaerobic
consortia
at
presence
magnetite,
synthesis
belonging
Alphaproteobacteria,
Candidate
phylum,
Chloroflexi
secreted
abundant
siderophores,
combined
ionized
from
form
siderophore-Fe(III)
complexes.
These
complexes
were
then
used
via
a
specific
outer
membrane
receptor
transported
transporter
protein
periplasm,
further
releasing
Fe(III).
Cytochrome
c
was
formed
complex
reduction,
assimilation
Fe–S
heme
B
increase
capability.
This
study
reveals
siderophore-mediated
cooperation
implies
driving
nitrogen
conversion
artificial
or
natural
system.
Frontiers in Microbiology,
Journal Year:
2025,
Volume and Issue:
16
Published: Feb. 19, 2025
Uranium
mining
presents
significant
environmental
challenges,
particularly
through
radiological
contamination
affecting
soil
and
water
bodies.
While
microbial
communities
are
known
to
be
influenced
by
geochemical
factors
like
pH
nutrient
availability,
their
responses
severe
uranium
in
mine
tailing
environments
remain
poorly
understood.
This
study
investigated
community
distributions
soils
ores
at
four
sites
South
China
explore
adaptations
contamination.
concentrations
ranged
from
170
18,000
mg/kg,
with
the
most
severely
contaminated
samples
dominated
Cyanobacteria,
which
comprised
up
49.17%
of
community.
Proteobacteria,
such
as
Sphingomonas,
were
also
abundant,
indicating
roles
radiation
resistance,
while
Acidobacteriota
Actinobacteria
showed
negative
uranium.
Addition
lime
neutralize
acidity
tailings
led
an
increase
Gemmatimonadaceae,
a
family
commonly
found
under
oligotrophic
conditions.
Multivariate
statistical
analyses
confirmed
concentration
primary
factor
influencing
composition,
along
values,
total
nitrogen,
contents
Fe2O3
SiO2
soils.
Co-occurrence
network
analysis
suggested
that
extremely
high
disrupted
interrelationships,
reflecting
lived
more
independently
adopted
strategies
cope
intense
selective
pressure.
Intriguingly,
dispersal
limitation
governed
90%
assembly
high-uranium
(>10,000
mg/kg),
suggesting
isolated
ecological
niches.
Deterministic
processes
heterogeneous
homogeneous
selection
only
relatively
moderate
low
levels.
These
findings
provide
insights
into
dynamics
uranium-contaminated
related
bioremediation
strategies.
