Nanotechnology,
Год журнала:
2023,
Номер
35(19), С. 195706 - 195706
Опубликована: Дек. 11, 2023
Abstract
Critical
metals
of
environmental
and
economic
relevance
can
be
found
within
complex
mixtures,
such
as
mine
tailings,
electronic
waste
wastewater,
at
trace
amounts.
Specifically,
gold
is
a
critical
metal
that
carries
desired
redox
active
properties
in
various
applications,
including
modern
electronics,
medicine
chemical
catalysis.
Here
we
report
the
structuring
sub-micron
Fe-BTC/PpPDA
crystallites
into
larger
250
μ
m
or
500
granules
for
continuous
packed
bed
experiments
precision
separation
gold.
The
Structured
highly
crystalline
porous
with
BET
surface
area
750
2
g
−1
.
Further,
hybrid
nanocomposite
material
maintains
its
selectivity
ions
over
common
inorganic
interferents.
approach
reported
prevents
excessive
pressure
drop
ensures
stability
time
operation
column.
demonstrate
concentrate
least
42
wt%
under
dynamic
flow
operation.
These
findings
highlight
potential
practical
applications
industry,
particularly
selective
capture
from
mixtures.
Metals,
Год журнала:
2024,
Номер
14(7), С. 744 - 744
Опубликована: Июнь 24, 2024
With
advancements
in
hardware
and
software,
non-destructive
radiometric
analytical
methods
have
become
popular
a
wide
range
of
applications.
A
typical
case
is
the
study
leaching
process
metals
from
mineral
ores
mine
tailings.
The
objective
current
was
to
develop
method
based
on
neutron
activation
analysis
(NAA),
particular,
delayed
gamma
(DGNAA),
monitor
Mn
Zn
Ti
ore,
Cu
tailings,
Zn-Pb
DGNAA
performed
using
source:
deuterium-tritium
(D-T)
generator
for
MARIA
research
nuclear
reactor
Zn.
Laboratory-scale
ores,
tailings
investigated
gamma-rays
56Mn
(half-life
2.6
h).
dissolution
efficiencies
were
found
increase
with
interaction
time
HCl
concentration
(1
5
M)
vary
temperature
(22.5
110
°C).
Such
results
agree
those
obtained
by
total
reflection
X-ray
fluorescence
(TXRF)
spectrometry
same
samples.
65Zn
244
days)
chosen
investigate
real-time/online
During
online
monitoring,
recovery
also
reported
increased
time.
After
approximately
300
min
leaching,
80%,
79%,
53%
respectively,
reported.
Theoretically,
developed
mathematical
prediction
models
radiotracer
showed
that
spherical
diffusion
model
requires
much
less
attain
saturation
compared
linear
model.
NAA
handheld
(handheld-XRF)
TXRF
analysis.
analyzed
samples
encompassed
leached
which
subjected
different
conditions
time,
temperature,
concentrations.
XRF
confirmed
rise
fluctuate
temperature.
approach
important
can
be
applied
laboratories
industrial
setups
monitoring
any
element
whose
isotopes
activated
neutrons.
efficiency
metal-recovery
has
direct
impact
normal
operation
economic
advantages
hydrometallurgy.
Minerals,
Год журнала:
2025,
Номер
15(3), С. 268 - 268
Опубликована: Март 4, 2025
The
increasing
demand
for
critical
metals
essential
renewable
energy
technologies
necessitates
efficient
and
environmentally
sustainable
extraction
methods.
Ilmenite
(FeTiO3)
similar
ore
deposits
serve
as
abundant
sources
of
primary
elements
while
also
incorporating
a
suite
strategically
significant
trace
elements,
including
REEs
Hf,
among
others.
Mixer–settler
units
are
extensively
utilized
in
metal
purification
processes.
It
is
important
to
develop
approaches
tracking
the
metal’s
process
online
optimizing
flow
dynamics.
One
widely
adopted
technique
evaluating
dynamics
various
components
residence
time
distribution
(RTD)
measurement,
which
provides
insights
into
hydrodynamic
behavior
reactors.
This
study
explored
application
radiotracer
techniques
monitoring
solvent
processes
hydrometallurgy,
focusing
on
Hf
recovery.
A
mixer–settler
system
was
employed
using
di(2-ethylhexyl)
phosphoric
acid
(D2EHPA)
extractant
1M
HNO3
aqueous
phase
Ti
ore.
181Hf
synthesized
via
neutron
activation
introduced
track
RTD.
Real-time
revealed
over
95%
efficiency
within
133
min
(8000
s).
RTD
studies
validated
performance
perfect
mixers
series
axial
dispersion
models.
calculated
mean
100
(6000
s)
closely
aligned
with
theoretical
104
(6240
s),
confirming
model
accuracy.
findings
demonstrate
viability
radiotracers
extraction,
offering
real-time
efficiency.
IntechOpen eBooks,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 10, 2025
Spectroscopic
methods
are
essential
for
characterizing
minerals
because
they
provide
important
information
about
their
physical,
chemical,
and
structural
characteristics.
Recent
advances
in
spectroscopy
have
significantly
increased
our
ability
to
investigate
complex
mineral
systems
more
precisely
effectively.
This
chapter
offers
a
thorough
analysis
of
the
most
recent
spectroscopic
techniques
used
characterization,
such
as
advanced
electron
microscopy,
nuclear
magnetic
resonance
(NMR),
Raman
infrared
spectroscopy,
X-ray
fluorescence
(XRF),
spectroscopy.
Emerging
technologies
that
allow
real-time
dynamic
processes,
like
situ
synchrotron-based
highlighted.
The
importance
these
understanding
phase
transitions,
reactivity,
identification
defects
trace
elements
is
also
examines
how
data
computer
can
be
decipher
mineralogical
processes.
presents
findings
practical
applications,
highlighting
transformative
potential
promoting
innovation
characterization
related
disciplines.
Minerals,
Год журнала:
2023,
Номер
14(1), С. 21 - 21
Опубликована: Дек. 24, 2023
Kenya
is
an
East
African
country
with
the
third-largest
economy
in
sub-Saharan
Africa.
The
demand
for
metals
and
minerals
continues
to
increase
due
urbanization,
population
rise,
new
infrastructure
growth
different
countries.
formally
confirmed
discovery
of
oil
various
April
2013,
launching
itself
as
a
player
Africa’s
rapidly
expanding
extractive
sector.
This
review
paper
highlights
mining
status
role
hydrometallurgical
flotation
processes
recovery
deficit
from
ores
mine
wastes.
nation’s
2030
Vision
anticipated
benefit
greatly
proceeds
sale
oil,
gas,
valuable
metals.
Because
was
originally
mapped
agricultural
region,
less
mineral
prospecting
done
earlier
times.
country’s
industry
now
dominated
by
manufacture
non-metallic
goods,
it
largely
neglected
minerals.
One
most
serious
problems
production
tailings
that
hold
strategic
material
already
ground,
which
means
energy-consuming
process
has
been
applied,
chemical
engineering
like
leaching
are
more
feasible
at
this
point.
Hydrometallurgical
wastes,
high
low-grade
ores,
or
essential.
resources
will
be
preserved,
ensures
sustainability
industry.
