Water,
Journal Year:
2024,
Volume and Issue:
16(20), P. 2883 - 2883
Published: Oct. 10, 2024
Various
green
materials
like
biochar
and
Fe0
(nano-scale
zerovalent
iron,
nZVI)
have
been
applied
to
remediate
aqueous
Cr(VI)
contamination,
but
few
studies
tried
further
improve
the
performance
of
nZVI
and/or
composites
with
different
sulfidation
methods.
Here,
we
modified
a
hybrid
material
nZVI@biochar
Na2S
pyrite
(FeS2),
it
remove
under
experimental
conditions,
revealed
key
factors
influencing
removal
performance.
The
results
show
that
loading
is
an
effective
method
increase
Fe
S
contents
in
composites.
FeSx-nZVI@BC
(1:1)
had
efficiency
~95%
5
mg/L
loaded,
which
was
much
higher
than
other
showed
decreasing
trend
pH
conditions
increased
from
3
9.
presence
dissolved
oxygen
Cu2+
Cd2+
could
significantly
suppress
Cr(VI),
while
humic
acids
at
concentrations
did
not
removal.
After
reaction,
observed
energy-dispersive
spectrometer
(SEM-EDS)
most
Cr
solid
phase
closely
associated
minerals.
X-ray
photoelectron
spectroscopy
(XPS)
spectra,
together
Fe2+-quenching
method,
confirmed
(Fe2+
or
Fe0)
acted
as
main
electron
donor,
contributing
~90%
reduction.
Our
study
indicates
remediation
pyrite-loaded
nZVI@BC
composite
strong
potential
be
water
contaminated
by
Cr(VI).
