Environmental Science & Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 5, 2025
The
atmospheric
pressure
plasma
jet
(APPJ)
is
a
promising
technology
for
inactivating
waterborne
pathogens
by
generating
diverse
reactive
species
under
ambient
conditions.
However,
uncertainties
regarding
the
bacterial
inactivation
mechanisms
persist
due
to
varying
findings
in
prior
research.
This
study
aimed
clarify
of
two
representative
bacteria,
Staphylococcus
aureus
(S.
aureus,
Gram-positive)
and
Escherichia
coli
(E.
coli,
Gram-negative),
using
an
argon-based
APPJ
(Ar-APPJ)
system
controlled
medium,
primarily
deionized
water.
We
identified
several
oxygen
nitrogen
(RONS),
including
hydrogen
peroxide,
peroxynitrous
acid/peroxynitrite
(ONOOH/ONOO–),
hydroxyl
radical
(•OH),
hydroperoxyl
radical/superoxide
radical,
evaluated
their
roles
inactivation.
Inactivation
experiments
quantification
suspected
RONS
revealed
that
ONOOH
was
primary
lethal
agent
S.
while
•OH
predominantly
inactivated
E.
coli.
Assessment
cell
membrane
integrity
intracellular
levels
showed
with
its
thinner
wall,
more
vulnerable
surface
damage
caused
•OH.
In
contrast,
thicker
attack
penetrated
ONOOH,
being
significantly
diffusive
than
•OH,
effective,
as
alone
could
not
induce
sufficient
damage.
These
advance
our
understanding
Ar-APPJ
provide
valuable
insights
designing
effective
water
disinfection
strategies
utilizing
this
technology.
Proceedings of the National Academy of Sciences,
Год журнала:
2024,
Номер
121(3)
Опубликована: Янв. 8, 2024
The
studies
on
the
origin
of
versatile
oxidation
pathways
toward
targeted
pollutants
in
single-atom
catalysts
(SACs)/peroxymonosulfate
(PMS)
systems
were
always
associated
with
coordination
structures
rather
than
perspective
pollutant
characteristics,
and
analysis
mechanism
commonality
is
lacking.
In
this
work,
a
variety
(M-SACs,
M:
Fe,
Co,
Cu)
fabricated
via
pyrolysis
process
using
lignin
as
complexation
agent
substrate
precursor.
Sixteen
kinds
commonly
detected
various
references
selected,
their
ln
k
obs
values
M-SACs/PMS
correlated
well
(
R
2
=
0.832
to
0.883)
electrophilic
indexes
(reflecting
electron
accepting/donating
ability
pollutants)
energy
gap
0.801
0.840)
between
complexes.
Both
transfer
(ETP)
radical
can
be
significantly
enhanced
systems,
while
was
overwhelmed
by
ETP
lower
indexes.
contrast,
higher
represented
weaker
electron-donating
capacity
complexes,
which
resulted
accompanied
noticeable
oxidation.
addition,
different
regulated
gaps
complexes
pollutants.
As
result,
Fenton-like
activities
could
modulated
reaction
pathways,
determined
both
sites.
This
work
provided
strategy
establish
PMS-based
AOP
tunable
capacities
for
high-efficiency
organic
decontamination.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Июль 9, 2024
Abstract
Developing
eco-friendly
catalysts
for
effective
water
purification
with
minimal
oxidant
use
is
imperative.
Herein,
we
present
a
metal-free
and
nitrogen/fluorine
dual-site
catalyst,
enhancing
the
selectivity
utilization
of
singlet
oxygen
(
1
O
2
)
decontamination.
Advanced
theoretical
simulations
reveal
that
synergistic
fluorine-nitrogen
interactions
modulate
electron
distribution
polarization,
creating
asymmetric
surface
configurations
electron-deficient
nitrogen
vacancies.
These
properties
trigger
selective
generation
from
peroxymonosulfate
(PMS)
improve
neighboring
reactive
species,
facilitated
by
contaminant
enrichment
at
fluorine-carbon
Lewis-acid
adsorption
sites.
Utilizing
these
insights,
synthesize
catalyst
through
montmorillonite
(MMT)-assisted
pyrolysis
(NFC/M).
This
method
leverages
role
MMT
as
an
in-situ
layer-stacked
template,
enabling
controlled
decomposition
carbon,
nitrogen,
fluorine
precursors
resulting
in
enhanced
structural
adaptability,
site
accessibility,
mass-transfer
capacity.
The
NFC/M
demonstrates
impressive
290.5-fold
increase
phenol
degradation
efficiency
than
single-site
analogs,
outperforming
most
metal-based
catalysts.
work
not
only
underscores
potential
precise
electronic
manipulations
design
but
also
advances
development
efficient
sustainable
solutions
purification.
Water Research,
Год журнала:
2024,
Номер
255, С. 121485 - 121485
Опубликована: Март 18, 2024
Catalytic
polymerization
pathways
in
advanced
oxidation
processes
(AOPs)
have
recently
drawn
much
attention
for
organic
pollutant
elimination
owing
to
the
rapid
removal
kinetics,
high
selectivity,
and
recovery
of
carbon
from
wastewater.
This
work
presents
a
review
on
regimes
AOPs
their
applications
wastewater
decontamination.
The
mainly
highlights
three
critical
issues
reactions
induced
by
persulfate
activation
(Poly-PS-AOPs),
including
heterogeneous
catalysts,
pathways,
properties
substrates.
dominant
influencing
factors
selection
reactive
oxygen
species,
substrates
are
discussed
detail.
Moreover,
we
systematically
demonstrate
merits
challenges
Poly-PS-AOPs
upon
degradation
polymer
synthesis.
We
particularly
highlight
that
technology
could
be
promising
treatment
industrial
containing
heterocyclic
organics
synthesis
polymers
polymer-functionalized
materials
environmental
energy
applications.
