Molecules,
Год журнала:
2024,
Номер
29(13), С. 3217 - 3217
Опубликована: Июль 6, 2024
The
progressive
decline
of
the
coal
industry
necessitates
development
effective
treatment
solutions
for
acid
mine
drainage
(AMD),
which
is
characterized
by
high
acidity
and
elevated
concentrations
heavy
metals.
This
study
proposes
an
innovative
approach
leveraging
sulfate-reducing
bacteria
(SRB)
acclimated
to
contaminated
anaerobic
environments.
research
focused
on
elucidating
physiological
characteristics
optimal
growth
conditions
SRB,
particularly
in
relation
pH
level
temperature.
experimental
findings
reveal
that
SRB
exhibited
a
sulfate
removal
rate
88.86%
at
temperature
30
°C.
Additionally,
gel
particles
were
formulated
using
sodium
alginate
(SA)
carboxymethyl
cellulose
(CMC),
their
performance
was
assessed
under
specific
(pH
=
6,
C/S
1.5,
T
°C,
CMC
4.5%,
BSNa
0.4
mol/L,
cross-linking
time
9
h).
Under
these
conditions,
demonstrated
enhanced
efficiency
91.6%.
Thermal
analysis
via
differential
scanning
calorimetry
(DSC)
thermogravimetric
(TGA)
provided
further
insights
into
stability
properties
spheres.
underscore
potential
SRB-based
bioremediation
as
sustainable
efficient
method
AMD
treatment,
offering
novel
environmentally
friendly
solution
mitigating
adverse
effects
environmental
contamination.
Frontiers in Environmental Science,
Год журнала:
2025,
Номер
13
Опубликована: Май 8, 2025
Sulfate
reducing
bacteria
(SRB)
is
considered
to
be
the
most
promising
alternative
biological
treatment
for
immobilization
of
heavy
metals
due
its
high
efficiency
and
low
cost.
However,
mechanism
underlying
biomineralization
process
has
remained
unclear.
In
this
study,
kinetics
effects
Cd2+
Pb2+
mineralization
by
sulfate-reducing
Desulfovibrio
desulfuricans
Desulfobulbus
propionicus
were
investigated
based
on
microbial
technology,
scanning
electron
microscope
energy
dispersive
spectroscopy
(SEM-EDS),
transmission
(TEM),
X-ray
diffractometer
(XRD),
Raman
spectra
photoelectron
(XPS),
used
reveal
SRB
treatment.
The
results
showed
that
D.
had
a
more
efficient
metal
rate
than
desulfuricans,
up
98.97%
75.62%
at
initial
concentrations
30
60
mg/L
particularly.
respectively.
Both
achieved
80%
with
an
concentration
less
50
mg/L.
facilitate
precipitation
in
solution
primarily
as
CdS,
while
Pb
mineralized
removed
through
phosphate
oxide
precipitates
PbS
via
their
metabolic
activities
involving
sulfate
conversion.
This
research
suggested
mediated
reduction
should
have
prospects
broad
application
bioremediation
mine
drainage.
Proceedings of the National Academy of Sciences,
Год журнала:
2024,
Номер
121(13)
Опубликована: Март 18, 2024
Biofilms
of
sulfate-reducing
bacterium
(SRB)
like
Desulfovibrio
vulgaris
Hildenborough
(DvH)
can
facilitate
metal
corrosion
in
various
industrial
and
environmental
settings
leading
to
substantial
economic
losses.
Although
the
mechanisms
biofilm
formation
by
DvH
are
not
yet
well
understood,
recent
studies
indicate
large
adhesin,
DvhA,
is
a
key
determinant
formation.
The
dvhA
gene
neighborhood
resembles
biofilm-regulating
Lap
system
Pseudomonas
fluorescens
but
curiously
missing
c-di-GMP-binding
regulator
LapD.
Instead,
encodes
an
evolutionarily
unrelated
protein
(DVU1020)
that
we
hypothesized
functionally
analogous
To
study
this
unusual
overcome
experimental
limitations
with
slow-growing
anaerobe
DvH,
reconstituted
its
predicted
SRB
P.
strain
lacking
native
regulatory
components
(Δ
lapG
Δ
lapD
).
Our
data
support
model
DvhA
cell
surface–associated
LapA-like
adhesin
N-terminal
“retention
module”
released
from
surface
upon
cleavage
LapG-like
protease
DvhG.
Further,
demonstrate
DVU1020
(named
here
DvhD)
represents
distinct
class
c-di-GMP-binding,
proteins
regulates
DvhG
activity
response
intracellular
levels
second
messenger.
This
provides
insight
into
players
responsible
for
thereby
expanding
our
understanding
Lap-like
systems.
Molecules,
Год журнала:
2024,
Номер
29(13), С. 3217 - 3217
Опубликована: Июль 6, 2024
The
progressive
decline
of
the
coal
industry
necessitates
development
effective
treatment
solutions
for
acid
mine
drainage
(AMD),
which
is
characterized
by
high
acidity
and
elevated
concentrations
heavy
metals.
This
study
proposes
an
innovative
approach
leveraging
sulfate-reducing
bacteria
(SRB)
acclimated
to
contaminated
anaerobic
environments.
research
focused
on
elucidating
physiological
characteristics
optimal
growth
conditions
SRB,
particularly
in
relation
pH
level
temperature.
experimental
findings
reveal
that
SRB
exhibited
a
sulfate
removal
rate
88.86%
at
temperature
30
°C.
Additionally,
gel
particles
were
formulated
using
sodium
alginate
(SA)
carboxymethyl
cellulose
(CMC),
their
performance
was
assessed
under
specific
(pH
=
6,
C/S
1.5,
T
°C,
CMC
4.5%,
BSNa
0.4
mol/L,
cross-linking
time
9
h).
Under
these
conditions,
demonstrated
enhanced
efficiency
91.6%.
Thermal
analysis
via
differential
scanning
calorimetry
(DSC)
thermogravimetric
(TGA)
provided
further
insights
into
stability
properties
spheres.
underscore
potential
SRB-based
bioremediation
as
sustainable
efficient
method
AMD
treatment,
offering
novel
environmentally
friendly
solution
mitigating
adverse
effects
environmental
contamination.
