Current Opinion in Biotechnology,
Год журнала:
2024,
Номер
88, С. 103164 - 103164
Опубликована: Июль 3, 2024
The
sulfur
cycle
is
a
complex
biogeochemical
characterized
by
the
high
variability
in
oxidation
states
of
sulfur.
While
essential
for
life
processes,
certain
compounds,
such
as
hydrogen
sulfide,
are
toxic
to
all
forms.
Micro-organisms
facilitate
cycle,
playing
prominent
role
even
extreme
environments,
soda
lakes,
acid
mine
drainage
sites,
hot
springs,
and
other
harsh
habitats.
activity
these
micro-organisms
presents
unique
opportunities
mitigating
sulfur-based
pollution
enhancing
recovery
metals.
This
review
highlights
application
sulfur-oxidizing
-reducing
environmental
biotechnology
through
three
illustrative
examples.
Additionally,
it
discusses
challenges,
recent
trends,
prospects
associated
with
applications.
Frontiers in Microbiology,
Год журнала:
2024,
Номер
15
Опубликована: Март 28, 2024
In
view
of
water
and
soil
getting
polluted
by
Pb(II),
Zn(II),
other
heavy
metals
in
tailings
acid
mine
drainage
(AMD),
we
explored
the
removal
effect
sulfate-reducing
bacteria
(SRB)
on
pollutants
solution
based
microbial
treatment
technology.
We
used
scanning
electron
microscope-energy
dispersive
spectroscopy
(SEM-EDS),
X-ray
diffraction
(XRD),
fluorescence
(XRF),
to
reveal
mechanism
SRB
tailings.
The
results
showed
that
had
a
strong
capacity
for
Zn(II)
at
0–40
mg/L;
however,
60–100
mg/L
inhibited
growth
SRB.
Similarly,
exhibited
very
ability
remove
Pb(II)
from
solution.
At
concentration
10–50
mg/L,
its
percentage
was
100%.
could
effectively
immobilize
leached
With
an
increase
amount
added
each
layer,
treat
diminished.
When
1
cm
tailingssand
best
tailing
sand
treatment.
After
treatment,
immobilization
rates
SO42-
,
Fe(III),
Mn(II),
Cu(II),
total
Cr
leachate
#1
were
95.44%,
100%,
90.88%,
96.20%,
86.23%,
93.34%,
respectively.
treated
SRB,
although
solidified
into
cohesive
mass
loose
granular
particles,
their
mechanical
strength
<0.2
MPa.
Desulfovibrio
Desulfohalotomaculum
played
predominant
roles
treating
mixing
S
2−
carbonate
produced
during
metabolize
sulfate
combining
with
metal
ions
released
form
FeS,
MnS,
ZnS,
CuS,
PbS,
2
3
CaCO
MnCO
precipitated
particles.
These
particles
attached
surface
tailings,
reducing
environmental
pollution
around
mining
area.
