Zerovalent
iron
(ZVI)
is
a
widely
utilized
remediation
agent
for
contaminated
soil
and
groundwater;
however,
it
has
consistently
faced
the
challenge
of
balancing
catalytic
activity
with
storage
stability.
Herein,
submicron
ZVI
particles
were
phosphatized
to
produce
(P-ZVI),
which
was
employed
activate
peroxydisulfate
(PDS)
phenol
degradation.
As
anticipated,
phosphatization
significantly
enhanced
both
stability
(>10
months
vs
1
d)
(4.37
0.12
L
m–2
h–1)
compared
unphosphatized
counterparts
attributed
formation
crystalline
Fe3P
shell
on
P-ZVI.
This
selectively
interacts
H2O/O2/PDS,
maintaining
P-ZVI
under
high
humidity
oxygen
conditions
while
creating
mass
transfer
channels
that
enhance
reactivity
in
presence
PDS.
Characterization
results
from
reaction
process
demonstrated
activated
PDS
through
direct
(via
Fe
cations)
indirect
pathways
(through
phosphorus
anion-mediated
Fe3+/Fe2+
cycle),
generating
reactive
species
facilitating
between
core
Fe0
external
efficient
activation
study
elucidates
how
constructing
an
can
realize
selective
simultaneously
enhancing
stabilities
ZVI,
thereby
boosting
practical
application
PDS-based
advanced
oxidation
processes
various
environmental
remediation.
