Environmental Science & Technology,
Год журнала:
2023,
Номер
57(32), С. 12105 - 12116
Опубликована: Авг. 2, 2023
Intracellular
antibiotic
resistance
genes
(iARGs)
constitute
the
important
part
of
wastewater
ARGs
and
need
to
be
efficiently
removed.
However,
due
dual
protection
intracellular
DNA
by
bacterial
membranes
cytoplasm,
present
disinfection
technologies
are
largely
inefficient
in
iARG
degradation.
Herein,
we
for
first
time
found
that
erythrosine
(ERY,
an
edible
dye)
could
degrade
iARGs
producing
abundant
1O2
under
visible
light.
Seven
log
antibiotic-resistant
bacteria
were
inactivated
within
only
1.5
min,
6
completely
degraded
40
min
photosensitized
ERY
(5.0
mg/L).
A
linear
relationship
was
established
between
ARG
degradation
rate
constants
concentrations
photosensitizing
system.
Surprisingly,
a
3.2-fold
faster
than
extracellular
observed,
which
attributed
unique
indirect
oxidation
induced
1O2.
Furthermore,
effective
real
other
photosensitizers
(including
Rose
Bengal
Phloxine
B)
high
yields
also
achieve
efficient
The
findings
increase
our
knowledge
preference
provide
new
strategy
developing
with
yield,
like
photosensitizing,
removal.
Accounts of Chemical Research,
Год журнала:
2022,
Номер
55(3), С. 286 - 297
Опубликована: Янв. 13, 2022
ConspectusBecause
of
the
deterioration
global
water
quality,
occurrence
chemical
and
microbial
contaminants
in
raises
serious
concerns
for
health
population.
Identifying
developing
effective
environmentally
friendly
treatment
technologies
are
critical
to
obtain
clean
water.
Among
various
purification
water,
ultraviolet
photolysis
chlorine
(UV/chlorine),
an
emerging
advanced
oxidation
process
(AOP),
has
multiple
functions
control
via
production
hydroxyl
radicals
(HO·)
reactive
species
(RCS),
such
as
Cl·,
ClO·,
Cl2·–.This
Account
centers
around
radical
chemistry
RCS
HO·
different
matrices
their
roles
mechanisms
abatement
contaminants.
The
concentrations
Cl2·–
comparable
or
higher
than
those
(10–14
10–13
M).
reactivities
more
selective
with
a
broader
range
second-order
rate
constants
(k).
k
values
Cl·
toward
most
aromatics
similar
compared
HO·,
while
ClO·
less
but
containing
electron-donating
functional
groups.
Their
major
reaction
electron
transfer
addition,
primarily
involve
transfer.
As
aliphatics,
both
much
lower
aromatics.
them
hydrogen
abstraction,
except
olefins,
which
addition.
In
greatly
contribute
inactivation
contaminants.Toward
future
application,
UV/chlorine
pros
cons.
Compared
traditional
HO·-based
AOP
UV/H2O2,
is
efficient
energy-saving
disinfection,
its
efficiency
affected
by
matrix
components.
However,
formation
toxic
byproducts
limits
application
scenarios.
dissolved
organic
matter
(DOM)-rich
halogenated
enhanced
UV/chlorine.
presence
ammonia,
nitrogen
(RNS)
(e.g.,
·NO
·NO2)
involved,
highly
nitro(so)
products
nitro(so)-phenolics
N-nitrosodimethylamine
generated.
For
niche
recommended
be
utilized
low
levels
DOM
ammonia.Strategies
should
developed
make
full
use
(RCS
HO·)
target
reduce
byproducts.
example,
can
used
tandem
other
treatments
create
barriers
safe
halogen
very
important
ecosystems
well
areas
medical
therapy
synthesis.
homogeneous
system
generate
radicals,
thus
it
provides
perfect
investigate
fates
interdisciplinary
research.
Environmental Science & Technology,
Год журнала:
2022,
Номер
56(7), С. 4413 - 4424
Опубликована: Март 22, 2022
Periodate
(PI)-based
advanced
oxidation
process
has
recently
attracted
great
attention
in
the
water
treatment
processes.
In
this
study,
solar
irradiation
was
used
for
PI
activation
to
disinfect
waterborne
bacteria.
The
PI/solar
system
could
inactivate
Escherichia
coli
below
limit
of
detection
(LOD,
10
CFU
mL-1)
with
initial
concentrations
1
×
106,
107,
and
108
mL-1
within
20,
40,
100
min,
respectively.
•O2-
•OH
radicals
contributed
bacterial
disinfection.
These
reactive
attack
penetrate
cell
membrane,
thereby
increasing
amount
intracellular
oxygen
species
destroying
defense
system.
damage
membrane
caused
leakage
K+
DNA
(that
be
eventually
degraded).
Excellent
disinfection
performance
systems
achieved
a
wide
range
solution
pH
(3-9),
coexisting
humic
acid
(0.1-10
mg
L-1)
broad
ionic
strengths
(15-600
mM).
also
efficiently
Gram-positive
Bacillus
subtilis.
Moreover,
activated
by
natural
sunlight
107
viable
E.
LOD
river
sea
waters
working
volume
L
40
50
Clearly,
potentially
applied
bacteria
water.
Environmental Science & Technology,
Год журнала:
2022,
Номер
56(16), С. 11657 - 11669
Опубликована: Июль 26, 2022
The
elimination
of
gaseous
sulfur-containing
volatile
organic
compounds
(S-VOCs)
by
a
microbubble-assisted
Fenton-like
process
is
an
innovative
strategy.
Herein,
we
established
to
eliminate
malodorous
microbubble
CH3SH
as
representative
S-VOCs,
in
which
BiOCl
nanosheets
loaded
on
three-dimensional
sponge
were
exposed
(001)
or
(010)
facets
and
induced
interface
reactions.
Intriguingly,
the
significantly
removed
99.9%
CH3SH,
higher
than
that
macrobubble-assisted
(39.0%).
self-accelerating
interfacial
catalytic
mechanism
was
in-depth
identified
situ
ATR-FTIR,
PTR-TOF-MS,
EPR,
DFT
computational
study.
extraordinary
performance
lies
enhancing
dissolution/mass
transfer
gas/liquid
phase
tight
contact
between
CH3SH-microbubbles
3D-BiOCl
due
low
rising
velocity
(0.13
mm
s–1)
negative
charge
(−45.53
mV)
CH3SH-microbubbles,
well
effective
generation
1O2
activating
enriched
dissolved
oxygen
CH3SH-microbubble
via
electron-polarized
sites
sponge.
Furthermore,
transferred
electrons
H2O2
through
electron-rich
vacancy
centers
generate
more
•OH,
thus
achieving
excellent
performance.
Overall,
this
study
demonstrates
enhanced
S-VOC
provides
underlying
mechanisms.
