Environmental Technology & Innovation,
Journal Year:
2023,
Volume and Issue:
32, P. 103380 - 103380
Published: Sept. 29, 2023
Microbially
induced
carbonate
precipitation
(MICP)
is
increasingly
being
explored
for
Pb-contaminated
water
bodies
and
soil
remediation.
However,
the
Pb-related
precipitate
resulting
from
MICP
process
can
possibly
leach
acid
over
time
when
subjected
to
harsh
environments,
causing
serious
threats
human
health.
In
this
study,
first
time,
self-healing
microbial-induced
calcium
(MICC)
materials
are
proposed
applied
prevent
Pb2+
migration
where
leached
after
spore
germination,
spore-vegetative
cell
transformation,
urease
secretion,
urea
hydrolysis,
thereby
producing
spore-containing
precipitation.
This
was
repeated
five
times
explore
effect
of
a
circular
environment
on
MICC
materials.
Results
indicated
that
Pb
immobilization
would
have
deteriorated
if
inosine
trace
elements
had
not
been
intervened
during
germination
respectively.
The
spores
vegetative
cells
provided
extra
nucleation
sites
minerals
attach.
extracellular
polymeric
substances
(EPSs)
combined
with
functional
groups
chemical
bonds
their
surrounding
environments.
scanning
electron
microscopy–energy-dispersive
X-ray
spectroscopy
(SEM–EDS)
images
also
cerussite
mineral
precipitated
prior
calcite
because
more
affinity
combine
CO32-
OH-.
An
efficiency
greater
than
95%
remained
nearly
same
cycles,
while
it
reduced
very
quickly
less
10%
three
cycles
neglecting
materials,
thus
highlighting
relative
merits.
