The
nitrogen
removal
efficiency
and
distribution
of
microbial
community
structures
in
a
denitrification
process
aided
by
zero-valent
iron
under
low
carbon-to-nitrogen
ratio
were
assessed
this
study.
Experimental
results
demonstrated
that
the
(TNRE)
increased
to
96.4
±
2.72%
63.3
4.02%
after
continuous
addition
ZVI
with
Fe/N
6
at
C/N
3
2,
respectively,
which
was
4%
7.7%
higher
compared
blank
control.
Meanwhile,
EPS
production
28.43%
53.10%
stimulation
control
group,
can
be
used
as
an
electron
transfer
medium
endogenous
carbon
source
for
system.
Finally,
symbiotic
system
autotrophic
heterotrophic
formed
ZVI-enhanced.
This
study
propose
new
insights
into
improved
ZVI.
Water Research X,
Journal Year:
2024,
Volume and Issue:
27, P. 100299 - 100299
Published: Dec. 27, 2024
Widespread
polyethylene
terephthalate
microplastics
(PET
MPs)
have
played
unintended
role
in
nitrous
oxide
(N2O)
turnovers
(i.e.,
production
and
consumption)
at
wastewater
treatment
plants
(WWTPs).
Mainstream
aerobic
granular
sludge
(AGS)
systems
possess
potentially
strong
N2O-sink
capability,
which
may
be
reduced
by
PET
MPs
stress
through
altering
N2O-contributing
pathways,
electron
transfer,
microbial
community
structures.
In
this
study,
the
effects
of
with
two
common
particle
sizes
effluent
from
WWTPs
(0.1
0.5
mm)
on
N2O
turnovers,
pathways
capability
were
systematically
disclosed
AGS
a
series
biochemical
tests
molecular
biological
means
to
achieve
goal
carbon
neutrality.
The
results
indicated
that
0.1
mm
could
more
significantly
stimulate
inhibiting
denitrifying
metabolism,
compared
control
systems.
Specifically,
slightly
increased
relative
abundance
Nitrosomonas,
reducing
yields
via
promoting
hydroxylamine
(NH2OH)
oxidation
pathway
during
nitrification.
Also,
inhibited
transport
system
activities
reductase,
hindering
reduction
denitrification.
Most
importantly,
apparently
based
ratio
reductase
gene
nitrite
gene.
Microorganisms,
Journal Year:
2024,
Volume and Issue:
12(6), P. 1218 - 1218
Published: June 17, 2024
Enhanced
denitrification
has
been
reported
under
weak
electric
fields.
However,
it
is
difficult
to
investigate
the
mechanism
of
enhanced
due
complex
interspecific
interactions
mixed-culture
systems.
In
this
study,
Pseudomonas
stutzeri,
capable
anaerobic
conditions,
was
selected
for
treating
low
COD/N
(2.0,
ratio
between
concentration
chemical
oxygen
demand
and
NO3−-N)
artificial
wastewater
constant
external
voltages
0.2,
0.4,
0.6
V.
The
results
revealed
that
P.
stutzeri
exhibited
highest
efficiency
in
nitrate
reduction
at
0.2
Moreover,
maximum
removal
rate
15.96
mg/(L·h)
among
closed-circuit
groups,
19.39%
higher
than
open-circuit
group.
Additionally,
a
notable
nitrite
accumulation
observed
Enzyme
activity
analysis
showed
reductase
activities
were
significantly
increased
while
inhibited.
Transcriptomic
indicated
amino
acid
metabolism,
carbohydrate
energy
metabolism
increased,
enhancing
resistance
environmental
stress
carbon
source
utilization
denitrification.
current
study
examined
impacts
fields
on
enzyme
microbial
metabolic
pathways
offers
valuable
insights
into
by
which
Proceedings of the National Academy of Sciences,
Journal Year:
2024,
Volume and Issue:
121(50)
Published: Dec. 4, 2024
Increasing
food
production
and
ensuring
drinking
water
safety
have
always
been
a
focus
of
attention,
especially
for
people
in
underdeveloped
regions
the
world.
Traditional
excessive
fertilizer
applications
increased
crop
yield
but
also
caused
groundwater
nitrate
pollution.
Agricultural
irrigating
is
an
important
reservoir
nitrogen
(N)
(e.g.,
nitrate)
accumulation
after
fertilization.
Ammonium
(NH
4
+
-N)
more
readily
absorbed
N
form
by
rice
than
(NO
3
−
-N).
In
this
study,
we
proposed
strategy
using
iron
single-atom
catalysts
(Fe-SAC)
to
selectively
reduce
NO
-N
NH
from
real
paddy
field
provide
sustainable
supplies
uptakes,
thereby
highlighting
decreasing
mitigating
Then,
constructed
solar-energy-driven
electrochemical
reactor
reduction,
with
Fe
single
atom
as
core
catalyst,
achieved
average
selectivity
80.2
±
2.6%
no
additional
energy
input.
Sustainable
resulted
30.4
%
increase
100-grain
weight
cultivated
50%
decrease
application
those
fertilization
group
pot
experiment,
which
were
one
best
values
ever
reported.
Furthermore,
15
isotope
tracing
results
indicated
use
efficiency
(NUE)
71.2
3.2%.
played
key
role
promoting
root
development
contributed
high
NUE.
Our
study
shares
unique
insights
increasing
grain
yield,
reducing
applications,
preventing
leaching
into
groundwater.
Molecules,
Journal Year:
2024,
Volume and Issue:
29(5), P. 1077 - 1077
Published: Feb. 29, 2024
Raman
spectroscopy
is
an
emerging
method
for
the
identification
of
bacteria.
Nevertheless,
a
lot
different
parameters
need
to
be
considered
establish
reliable
database
capable
identifying
real-world
samples
such
as
medical
or
environmental
probes.
In
this
review,
establishment
databases
with
proper
design
in
microbiological
studies
demonstrated,
shining
light
into
all
parts
that
require
attention.
Aspects
strain
selection,
sample
preparation
and
isolation
requirements,
phenotypic
influence,
measurement
strategies,
well
statistical
approaches
discrimination
bacteria,
are
presented.
Furthermore,
influence
these
aspects
on
spectra
quality,
result
accuracy,
read-out
discussed.
The
aim
review
serve
guide
can
support
fields.
Bioactive Materials,
Journal Year:
2024,
Volume and Issue:
39, P. 224 - 238
Published: May 23, 2024
Transcutaneous
implants
that
penetrate
through
skin
or
mucosa
are
susceptible
to
bacteria
invasion
and
lack
proper
soft
tissue
sealing.
Traditional
antibacterial
strategies
primarily
focus
on
bacterial
eradication,
but
excessive
exposure
bactericidal
agents
can
induce
noticeable
damage.
Herein,
a
rechargeable
model
(HPI-Ti)
was
constructed
using
perylene
polyimide,
an
aqueous
battery
material,
achieving
temporal-sequence
regulation
of
killing
Charge
storage
within
HPI-Ti
is
achieved
after
galvanostatic
charge,
chemical
discharge
initiated
when
immersed
in
physiological
environments.
During
the
early
stage,
post-charging
demonstrates
rate
99.96
±
0.01
%
for
24
h,
preventing
biofilm
formation.
Contact-dependent
violent
electron
transfer
between
material
causes
death.
In
later
attenuated
discharging
status
creates
gentler
electron-transfer
micro-environment
fibroblast
proliferation.
After
discharge,
activity
be
reinstated
by
recharge
against
potential
reinfection.
The
efficacy
compatibility
were
verified
vivo.
These
results
demonstrate
charge-transfer-based
reconciling
with
compatibility.
