Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(42), P. 19070 - 19079
Published: Oct. 9, 2024
When
222
nm
far-UVC
is
used
to
drive
AOPs,
photolysis
emerges
as
a
critical
pathway
for
the
degradation
of
numerous
organic
micropollutants
(OMPs).
However,
photodegradation
mechanisms
asymmetrically
polarized
OMPs
at
remain
unclear,
potentially
posing
knowledge
barrier
applications
far-UVC.
This
study
selected
carbamazepine
(CBZ),
prevalent
aquatic
antiepileptic
drug
that
degrades
negligibly
254
nm,
investigate
its
nm.
Accelerated
CBZ
treatment
by
was
mainly
attributed
in
situ
ROS
generation
via
self-sensitized
CBZ.
By
quenching
experiments
and
EPR
tests,
•OH
radicals
were
identified
major
contributor
photodegradation,
whereas
O2•–
played
minor
role.
deoxygenation
solvent
exchange
experiments,
H2O
molecules
demonstrated
play
crucial
role
deactivating
excited
singlet
state
(1CBZ*)
nm:
generating
electron
transfer
interactions
with
1CBZ*.
In
addition,
1CBZ*
could
also
undergo
photoionization
process.
The
transformation
products
pathways
proposed,
toxicities
CBZ's
predicted.
These
findings
provide
valuable
insights
into
OMPs'
far-UVC,
revealing
more
mechanistic
details
far-UVC-driven
systems.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(22), P. 14085 - 14122
Published: May 22, 2024
Infectious
diseases
pose
a
serious
threat
and
substantial
economic
burden
on
global
human
public
health
security,
especially
with
the
frequent
emergence
of
multidrug-resistant
(MDR)
bacteria
in
clinical
settings.
In
response
to
this
urgent
need,
various
photobased
anti-infectious
therapies
have
been
reported
lately.
This
Review
explores
discusses
several
photochemical
targeted
antibacterial
therapeutic
strategies
for
addressing
bacterial
infections
regardless
their
antibiotic
susceptibility.
contrast
conventional
therapies,
these
approaches
facilitate
precise
targeting
pathogenic
and/or
infectious
microenvironments,
effectively
minimizing
toxicity
mammalian
cells
surrounding
healthy
tissues.
The
highlighted
include
photodynamic
therapy,
photocatalytic
photothermal
endogenous
pigments-based
photobleaching
polyphenols-based
photo-oxidation
therapy.
comprehensive
exploration
aims
offer
updated
information
development
effective,
convenient,
safe,
alternative
counter
growing
MDR
future.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(47), P. 18452 - 18461
Published: Jan. 20, 2023
Ultraviolet
(UV)/chlor(am)ine
processes
are
emerging
advanced
oxidation
(AOPs)
for
water
decontamination
and
raising
continuous
attention.
However,
limitations
appear
in
the
UV/hypochlorite
UV/monochloramine
removing
specific
contaminants
ascribed
to
differences
sorts
yields
of
free
radicals.
Here,
this
study
reports
UV/dichloroisocyanurate
(NaDCC)
as
a
novel
source
NaDCC
was
demonstrated
be
well-balanced
compound
between
hypochlorite
monochloramine,
it
had
significant
UV
absorption
medium
intrinsic
quantum
yield.
The
UV/NaDCC
produced
more
substantial
hydroxyl
radicals
(·OH)
reactive
chlorine
species
(RCSs,
including
Cl·,
ClO·,
Cl2·-)
than
conventional
UV/chlor(am)ine,
thereby
generating
higher
efficiency.
reaction
mechanisms,
environmental
applicability,
energy
requirements
process
(ECs)
abatement
were
further
investigated.
results
showed
that
·OH
·NH2
attacked
ECs
mostly
through
hydrogen
atom
transfer
(HAT)
radical
adduct
formation,
whereas
Cl·
destroyed
mainly
HAT
single
electron
transfer,
with
ClO·
playing
certain
role
HAT.
Kinetic
model
analyses
revealed
outperformed
UV/chlor(am)ine
variety
matrices
superior
degradation
efficiency,
significantly
saving
up
96%
electrical
per
order.
Overall,
first
demonstrates
application
prospects
AOP
using
UV/NaDCC,
which
can
compensate
deficiency
AOPs.
Environmental Science & Technology,
Journal Year:
2022,
Volume and Issue:
56(17), P. 12542 - 12552
Published: Aug. 17, 2022
UVA
photolysis
of
nitrite
(NO2-)
occurs
in
a
number
natural
and
engineered
aquatic
systems.
This
study
reports
for
the
first
time
that
pathogenic
microorganisms
can
be
effectively
inactivated
during
coexposure
irradiation
NO2-
under
environmentally
relevant
conditions.
The
results
demonstrated
more
than
3
log
inactivation
Escherichia
coli
K-12,
Staphylococcus
aureus,
Spingopyxis
sp.
BM1-1
was
achieved
by
2.0
mg-N
L-1
synthetic
drinking
water
real
surface
water.
mainly
attributed
to
reactive
species
generated
from
rather
or
oxidation
alone.
predominantly
contributed
nitrogen
(NO2•
ONOO-/HOONO)
instead
oxygen
(HO•
O2•-).
A
kinetic
model
simulate
generation
established,
validated,
used
predict
contributions
different
various
environmental
Several
advanced
tools
(e.g.,
D2O
-
labeling
with
Raman
spectroscopy)
were
demonstrate
UVA/NO2-
treatment
DNA
destruction
species,
which
completely
suppressed
viable
but
nonculturable
(VBNC)
states
reactivation
bacteria.
highlights
novel
process
emphasizes
critical
role
disinfection
purification.
Land,
Journal Year:
2023,
Volume and Issue:
12(2), P. 472 - 472
Published: Feb. 14, 2023
In
recent
decades,
previously
unobserved
trace
compounds
have
become
more
widely
detected
in
wastewater
treatment
effluents
and
freshwater
ecosystems.
Emanating
from
various
sources
presenting
potential
human
health
ecological
risks
at
much
lesser
concentrations
than
traditional
contaminants,
detection
of
“emerging
contaminants”
has
increased
with
improvements
analytical
techniques.
The
behavior
emerging
contaminants
wetlands
is
a
topic
increasing
interest,
as
natural
are
known
to
transform
sequester
pollutants
constructed
or
utilized
address
elevated
constituents
concern.
Both
complex
biogeochemical
systems
interrelated
abiotic
biotic
mechanisms
leading
the
removal
contaminants.
A
literature
review
was
performed
assess
current
state
knowledge
wetland
involved
removing
these
surface
waters
effluents.
primary
discussed
sorption,
photodegradation,
microbial
biodegradation
phytoremediation.
most
influential
dependent
on
properties
studied.
Common
trends
exist
for
different
designs
leverage
based
hydrology,
substrate
vegetation
plantings.
Much
remains
be
understood
about
processes
occurring
they
relate
contaminant
removal.
Improving
understanding
role
can
help
manage
this
environmental
challenge
effectively.
