Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(13), P. 5433 - 5444
Published: March 17, 2023
Advanced
oxidation
processes
(AOPs)
are
increasingly
applied
in
water
and
wastewater
treatment.
Understanding
the
role
of
reactive
species
using
probes
quenchers
is
one
main
requirements
for
good
process
design.
However,
much
fundamental
kinetic
data
reactions
with
lacking,
probably
leading
to
inappropriate
probe
quencher
selection
dosing.
In
this
work,
second-order
rate
constants
over
150
such
as
•OH,
SO4•-,
Cl•
chemical
oxidants
free
chlorine
persulfate
were
determined.
Some
previously
ill-quantified
(e.g.,
furfuryl
alcohol
methyl
phenyl
sulfoxide
certain
oxidants,
nitrobenzene
1,4-dioxane
halogen
radicals)
found
be
kinetically
favorable.
The
specific
can
guided
by
improved
database.
criteria
properly
choosing
dosages
proposed
along
a
procedure
quantifying
interference
from
addition.
limitations
approaches
explicated,
possible
solutions
combination
other
tools)
proposed.
Overall,
database
protocols
provided
work
benefit
future
research
understanding
radical
chemistry
AOPs
well
radical-involved
processes.
Environmental Science & Technology,
Journal Year:
2023,
Volume and Issue:
57(33), P. 12153 - 12179
Published: Aug. 3, 2023
Urbanization
and
industrialization
have
exerted
significant
adverse
effects
on
water
quality,
resulting
in
a
growing
need
for
reliable
eco-friendly
treatment
technologies.
Persulfate
(PS)-based
advanced
oxidation
processes
(AOPs)
are
emerging
as
viable
technologies
to
treat
challenging
industrial
wastewaters
or
remediate
groundwater
impacted
by
hazardous
wastes.
While
the
generated
reactive
species
can
degrade
variety
of
priority
organic
contaminants
through
radical
nonradical
pathways,
there
is
lack
systematic
in-depth
comparison
these
pathways
practical
implementation
different
scenarios.
Our
comparative
analysis
reaction
rate
constants
vs.
indicates
that
radical-based
AOPs
may
achieve
high
removal
efficiency
with
relatively
short
contact
time.
Nonradical
feature
advantages
minimal
matrix
interference
complex
wastewater
treatments.
(e.g.,
singlet
oxygen,
high-valent
metals,
surface
activated
PS)
preferentially
react
bearing
electron-donating
groups,
allowing
enhancement
degradation
known
target
contaminants.
For
byproduct
formation,
analytical
limitations
computational
chemistry
applications
also
considered.
Finally,
we
propose
holistically
estimated
electrical
energy
per
order
(EE/O)
parameter
show
significantly
higher
requirements
pathways.
Overall,
critical
comparisons
help
prioritize
basic
research
PS-based
inform
merits
system-specific
applications.
Ecotoxicology and Environmental Safety,
Journal Year:
2023,
Volume and Issue:
267, P. 115564 - 115564
Published: Oct. 25, 2023
The
use
of
Advance
Oxidation
Process
(AOPs)
has
been
extensively
examined
in
order
to
eradicate
organic
pollutants.
This
review
assesses
the
efficacy
photolysis,
O3
based
(O3/UV,
O3/H2O2,
O3/H2O2/UV,
H2O2/UV,
Fenton,
Fenton-like,
hetero-system)
and
sonochemical
electro-oxidative
AOPs
this
regard.
main
purpose
some
suggestions
for
advancement
is
facilitate
elimination
toxic
Initially
proposed
purification
drinking
water
1980,
have
since
employed
various
wastewater
treatments.
technologies
are
essentially
a
process
intensification
through
hybrid
methods
treatment,
which
generate
large
amounts
hydroxyl
(•OH)
sulfate
(SO4·-)
radicals,
ultimate
oxidants
remediation
covers
ozone
or
UV
treatment
combination
create
powerful
method
treatment.
novel
approach
demonstrated
be
highly
effective,
with
acceleration
oxidation
Fenton
reaction
photocatalytic
technologies.
It
clear
that
helpful
degradation
compounds.
Additionally,
other
processes
such
as
•OH
SO4·-
radical-based
may
also
arise
during
contribute
reduction
target
summarizes
current
development
Environmental Science & Technology,
Journal Year:
2024,
Volume and Issue:
58(12), P. 5616 - 5626
Published: March 12, 2024
Advanced
oxidation
processes
(AOPs),
such
as
hydroxyl
radical
(HO•)-
and
sulfate
(SO4•–)-mediated
oxidation,
are
attractive
technologies
used
in
water
wastewater
treatments.
To
evaluate
the
treatment
efficiencies
of
AOPs,
monitoring
primary
radicals
(HO•
SO4•–)
well
secondary
generated
from
reaction
HO•/SO4•–
with
matrices
is
necessary.
Therefore,
we
developed
a
novel
chemical
probe
method
to
examine
five
key
simultaneously,
including
HO•,
SO4•–,
Cl•,
Cl2•–,
CO3•–.
Five
probes,
nitrobenzene,
para-chlorobenzoic
acid,
benzoic
2,4,6-trimethylbenzoic
2,4,6-trimethylphenol,
were
selected
this
study.
Their
bimolecular
rate
constants
diverse
first
calibrated
under
same
conditions
minimize
systematic
errors.
Three
typical
AOPs
(UV/H2O2,
UV/S2O82–,
UV/HSO5–)
tested
obtain
steady-state
concentrations.
The
effects
dissolved
organic
matter,
Br–,
concentration
inspected.
Our
results
suggest
that
five-probe
can
accurately
measure
HO•-
SO4•–-mediated
when
Br–
DOM
less
than
4.0
μM
15
mgC
L–1,
respectively.
Overall,
practical
easily
accessible
determine
multiple
simultaneously.
