Environmental Science and Ecotechnology,
Journal Year:
2024,
Volume and Issue:
21, P. 100421 - 100421
Published: April 20, 2024
Research
efforts
on
permanganate
(Mn(VII))
combined
with
redox-mediator
(RM),
have
received
increasing
attention
due
to
their
significant
performance
for
bisphenol-A
(BPA)
removal.
However,
the
mechanisms
underpinning
BPA
degradation
remain
underexplored.
Here
we
show
overlooked
interactions
between
RM
and
during
oxidation
by
introducing
an
RM—N-hydroxyphthalimide
(NHPI).
We
discovered
that
concurrent
generation
of
MnO2
phthalimide-N-oxyl
(PINO)
radical
significantly
enhances
within
pH
range
5.0–6.0.
The
detection
cross-coupling
products
PINO
radicals
or
its
derivatives
corroborates
pivotal
role
in
oxidation.
Intriguingly,
observed
formation
NHPI-BPA
complex,
which
undergoes
preferential
Mn(VII),
marked
emergence
electron-rich
domain
NHPI.
These
findings
unveil
underlying
Mn(VII)/RM
system
bridge
knowledge
gap
concerning
transformation
via
complexation.
This
research
paves
way
further
exploration
into
optimizing
complexation
sites
dosage,
enhancing
system's
efficiency
water
treatment
applications.
