Abstract:
Exploring
flexible,
economical,
and
environmentally
friendly
peracetic
acid
(PAA)
activation
methods
is
crucial
in
water
purification.
In
this
work,
a
cobalt-nitrogen-doped
porous
carbon
(Co-N-C)
composite
was
synthesized
by
direct
carbonization
of
ZIF-67,
employed
as
PAA
activator
to
enhance
norfloxacin
(NX)
degradation.
Rapid
degradation
NX
observed
the
Co-N-C/PAA
system
over
wide
pH
range
with
high
resistance
common
radical
scavengers,
anions,
natural
organics.
The
Co
species
surface
functional
groups
Co-N-C
were
primary
active
sites
for
activation.
hydroxyl
radicals
(HO·),
organic
free
(R-O·),
singlet
oxygen
(1O2),
(IV)
play
significant
roles
removal
NX.
Two
probable
pathways
confirmed
density
theory
high-performance
liquid
chromatography-mass
spectrometry.
biological
toxicity
after
reaction
effectively
reduced
via
system.
This
study
should
be
valuable
promoting
research
on
pollutants
ACS ES&T Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 5, 2024
The
quenching
method
is
widely
utilized
to
evaluate
the
contribution
of
reactive
species;
however,
its
validity
has
recently
been
questioned.
primary
role
superoxide
(O2•–)
in
pollutant
degradation
remains
controversial
due
low
reactivity.
To
ascertain
suitability
and
ability
O2•–,
a
simple
efficient
O2•–
generation
system
was
built
using
p-benzoquinone
(p-BQ)
as
probe
with
disodium
hydrogen
phosphate–dimethyl
sulfoxide
(DHP–DMSO).
results
demonstrated
that
accountable
for
p-BQ
transformation
DHP–DMSO,
can
also
be
generated
various
alkaline-organic
solvent
(methanol,
ethanol,
iso-propanol,
tert-butanol,
acetonitrile,
acetone,
chloroform,
tetrahydrofuran)
systems,
revealing
these
reagents
do
not
scavenge
O2•–.
Superoxide
dismutase
limited
on
presence
hydroxyl
radicals
(•OH).
Some
organic
solvents
produce
when
stimulated
by
•OH.
This
serves
reminder
exercise
caution
employing
quenchers.
exhibited
insufficient
capability
majority
eight
pollutants
tested.
relevance
quickly
discerned
DHP–DMSO.
study
holds
significant
importance
accurately
evaluating
species.
