The
reactivity
and
stability
of
zero-valent
iron
(ZVI)
sulfidated
(S-ZVI)
are
inherently
contradictory.
Iron
sulfides
(FeSX)
on
the
S-ZVI
surface
play
multiple
roles,
including
electrostatic
adsorption
catalyzing
reduction.
We
proposed
to
balance
air
by
modulating
FeSX.
Benefiting
from
superior
coordination
accelerate
electron
transport
capabilities
phosphate,
eco-friendly
ammonium
dihydrogen
phosphate
(ADP)
was
employed
synthesis
N,
P,
S-incorporated
ZVI
(NPS-ZVI)
regulate
FeSX
in
this
study.
Raman,
FTIR,
XPS,
DFT
calculations
were
combined
reveal
that
HPO42-
acts
as
main
P
species
Fe
surface.
NPS-ZVI
quantified
different
parameters
(kobs,
kSA,
kM),
which
210.77,
27.44,
211.17-fold
than
ZVI,
respectively.
demonstrated
excellent
pH
tolerance
reusability,
there
no
risk
secondary
pollution.
Critically,
could
effectively
maintain
under
combination
diffusion
limitation
protection
mechanisms
ADP.
attributed
fact
ADP
maintains
accelerates
transport.
This
study
provides
a
novel
strategy
balancing
offers
theoretical
support
for
material
modification.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Июль 24, 2024
Abstract
Biochar-supported
ZVI
have
received
increasing
attention
for
their
potential
to
remove
nitrobenzene
in
groundwater
and
soil.
However,
the
capacity
of
this
material
enhance
biological
reduction
alter
microbial
communities
anaerobic
not
been
explored.
In
study,
removal
performance
mechanism
modified
biochar-supported
zerovalent
iron
(ZVI)
composites
were
explored
The
results
showed
that
700
°C
biochar
composite
enhanced
inhibited
its
release
from
soil
aqueous
phase.
NaOH-700-Fe50
had
highest
rate
nitrobenzene,
reaching
64.4%.
300
nitrobenzene.
Microbial
degradation
rather
than
ZVI-mediated
was
main
pathway.
changed
richness
diversity
communities.
symbiotic
relationship
between
genera
weakened
competition
genera.
summary,
by
community
diversity,
upregulating
functional
genes,
promoting
electron
transfer.
Overall,
could
be
used
remediation,
is
a
promising
on-site
remediation
nitrobenzene-contaminated
groundwater.
