Hydrometallurgy,
Journal Year:
2022,
Volume and Issue:
213, P. 105950 - 105950
Published: Aug. 1, 2022
Biological
sulfidogenic
systems
are
advantageous
over
hydroxide
precipitation
methods
to
recover
base
metals
from
hot
and
acidic
metallurgical
streams.
Sulfide
is
not
widely
used
in
the
hydrometallurgical
industry
for
high
operational
capital
expenses
associated
with
compartmentalizing
metal
process.
A
single-stage
elemental
sulfur-reducing
process
which
sulfidogenesis
occur
concurrently
could
significantly
decrease
these
costs.
This
study
examines
effect
of
on
activity
an
adapted
thermoacidophilic
culture.
Batch
tests
were
conducted
Cu2+,
Ni2+,
Zn2+
concentrations
up
100,
570,
525
mg
L−1,
respectively.
All
ions
completely
precipitated
(LOQ
<
0.1
L−1)
higher
volumetric
sulfide
production
rates
than
experiments
without
metals.
Dissolved
appear
stimulate
sulfur
reduction
metabolism
a
redox-dependent
Additionally,
we
investigated
use
unadapted
microbial
inoculum
full-scale
anaerobic
reactor
as
fast
start-up
under
temperature
(80
°C),
low
pH
(pH
3),
Cu2+
(up
1143
L−1).
After
seven
days
operation,
found
equivalent
those
obtained
after
75
adaptation
same
inoculum.
These
results
encourage
development
conditions
suitable
microorganisms.
Minerals,
Journal Year:
2021,
Volume and Issue:
11(12), P. 1385 - 1385
Published: Dec. 8, 2021
The
interest
in
metal
sulfide
precipitation
has
recently
increased
given
its
capacity
to
efficiently
recover
several
metals
and
metalloids
from
different
aqueous
sources,
including
wastewaters
hydrometallurgical
solutions.
This
article
reviews
recent
studies
about
precipitation,
considering
that
the
most
relevant
review
on
topic
was
published
2010.
Thus,
our
emphasizes
focuses
overall
process
main
unit
operations.
study
follows
flow
diagram
definition,
discussing
progress
application
of
this
matrices
recover/remove
diverse
metals/metalloids
them,
addition
kinetic
reaction
reactor
types,
precipitate
behavior,
improvements
solid–liquid
separation,
future
perspectives.
features
included
are:
operational
conditions
terms
pH
Eh
perform
a
selective
recovery
contained
an
source,
aggregation/colloidal
behavior
precipitates,
new
materials
for
controlling
release,
novel
separation
processes
based
membrane
filtration.
It
is
therefore
direct
production
nanoparticles
(Nps)
method
could
potentially
become
research
approach
with
important
implications
operations,
which
possibly
expand
applications.
Antioxidants,
Journal Year:
2023,
Volume and Issue:
12(3), P. 767 - 767
Published: March 21, 2023
The
definition
of
reactive
sulfur
species
(RSS)
is
inspired
by
the
reactivity
and
variable
chemical
valence
sulfur.
Sulfur
an
essential
element
for
life
a
part
global
geochemical
cycles.
Wastewater
treatment
bioreactors
can
be
divided
into
two
major
categories:
reduction
oxidation.
We
review
origins
RSS
related
biotechnological
processes
in
environmental
management.
Sulfate
reduction,
sulfide
oxidation,
sulfur-based
redox
reactions
are
key
to
driving
coupled
carbon,
nitrogen,
co-cycles.
This
shows
coupling
cycle
with
carbon
nitrogen
cycles
provides
insights
material−chemical
cycle.
also
biological
classification
metabolic
mechanisms
functional
microorganisms
involved
processes,
such
as
sulfate-reducing
sulfur-oxidizing
bacteria.
Developments
molecular
biology
genomic
technologies
have
allowed
us
obtain
detailed
information
on
these
importance
requires
further
consideration.
