Metals,
Journal Year:
2024,
Volume and Issue:
14(6), P. 605 - 605
Published: May 21, 2024
Notable
increases
in
metal
consumption
and
declining
ore
grades
recent
decades
have
stressed
the
significance
of
dilute
solutions
as
secondary
sources
valuable
metals.
Moreover,
environmental
considerations
imperative
sustainable
development
further
emphasized
their
treatment.
Therefore,
finding
an
efficient
solution
for
separating
metals
from
has
attracted
attention
numerous
researchers.
This
paper
reviews
purification
processes
highlights
key
achievements
published
research
works.
Although
this
study
focuses
on
evaluating
efficiency
recently
developed
aqueous-phase
methods,
such
immobilized
ligands,
ionic
liquids,
air-assisted
solvent
extraction,
application
conventional
to
treat
these
solutions,
ion
exchange,
membranes,
chemical
precipitation,
adsorption
are
also
briefly
outlined.
To
provide
a
comprehensive
assessment,
more
than
200
articles
were
reviewed,
findings
stated
study.
contributes
advancement
knowledge
recovery
sheds
light
dynamic
evolution
field.
Solvent Extraction and Ion Exchange,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 21
Published: Jan. 31, 2025
The
extraction
of
lanthanides(III)
from
aqueous
nitric
acid
solutions
with
tetra(n-octyl)diglycolamide
into
trioctylammonium
di-2-ethylhexylsulfosuccinate
([N888H][SSu])
ionic
liquid
and
its
mixtures
molecular
organic
diluents
is
studied.
It
showed
that
the
efficiency
selectivity
Ln(III)
TODGA
[N888H][SSu]
significantly
higher
than
when
using
1-butyl-3-methylimidazolium
bis(trifluoromethylsulfonyl)imide
IL
[C4mim][Tf2N]
as
a
diluent.
Additionally,
in
system
[N888H][SSu],
transfer
SSu−
ions
phase
occurs
to
much
lesser
extent
Tf2N−
systems
[C4mim][Tf2N].
established
increases
added
phase.
synergistic
effect
arises
due
hydrophobicity
extractable
complexes
formed
by
ligand
anions
compared
those
containing
NO3−
counterions.
stoichiometry
extracted
determined,
influence
composition
phase,
nature
solvent
on
considered.
Molecules,
Journal Year:
2025,
Volume and Issue:
30(4), P. 786 - 786
Published: Feb. 8, 2025
The
synergistic
solvent
extraction
of
La(III),
Eu(III)
and
Lu(III)
with
a
chelating
extractant,
4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one
(HL),
neutral
bidentate
heterocyclic
amines,
such
as
1,10-phenanthroline
(S1
(phen))
or
2,2'-bipyridine
(S2
(bipy))
in
an
ionic
liquid
the
imidazolium
family
[C1C4im+][Tf2N-]
was
investigated.
Synergistic
effects
have
been
observed
to
result
from
formation
ternary
complex
organic
phase,
particularly
cases
where
ligand
S
is
agent.
Examples
include
La(L)2(S2)2,
Eu(L)3(S2)
Lu(L)x(S2)2,
well
La(L)3(S1)2,
Eu(L)2(S1)
Lu(L)3(S1)x).
parameters
process
were
determined
influence
agent
on
discussed.
Additionally,
increase
separation
factors
determined.
equilibrated
phases
analyzed
using
1H
NMR
spectroscopy
elucidate
synergism
mechanism.
role
diluent
complexation
processes
selectivity
investigated
employment
two
agents
for
various
metal
s-,
p-,
d-
f-cations
periodic
table,
almost
22
ions.
Minerals,
Journal Year:
2024,
Volume and Issue:
14(7), P. 734 - 734
Published: July 22, 2024
The
importance
of
rare
earth
elements
as
a
basis
for
the
development
new
technologies
or
improvement
existing
ones
makes
their
recovery
from
raw
and
waste
materials
necessary.
In
this
recovery,
hydrometallurgy
its
derivative
solvometallurgy
play
key
roles
due
to
operational
characteristics,
which
are
emphasized
with
use
ionic
liquids.
This
manuscript
reviews
most
recent
advances
(2023
2024)
in
liquids
unit
operations
(leaching
separation
technologies)
aimed
at
these
valuable
strategic
metals.
Moreover,
comprehensive
review
is
presented
chemicals
advanced
containing
some
elements.
The
importance
of
rare
earth
elements
as
the
basis
in
development
new
technologies
or
improvement
used
ones,
made
a
necessity
its
recovery,
besides
that
from
raw
materials,
waste
materials.
In
this
Hydrometallurgy
and
derivative
Solvometallurgy,
play
key
role
due
to
operational
characteristics,
which
are
emphasized
with
use
ionic
liquids.
manuscript
reviewed
most
recent
advances
(2023
2024
years)
about
liquids
unit
operations
(leaching
separation
technologies)
aimed
recovery
these
valuable
strategic
metals.
Moreover,
comprehensive
review
chemicals
advanced
materials
containing
some
is
presented.
Solvent Extraction and Ion Exchange,
Journal Year:
2024,
Volume and Issue:
42(5), P. 451 - 468
Published: July 28, 2024
The
growing
demand
for
valuable
metals
in
recent
decades
has
heightened
the
economic
significance
of
extracting
them
from
dilute
solutions.
This
research
carefully
assesses
extraction
efficiency
air-assisted
solvent
(AASX)
process
effectively
recovering
copper
industrial
solutions,
such
as
raffinate
(SX)
plant
and
heap
leach
results
clearly
showed
that
increasing
frother
dosage
to
50
mg/L
improved
Cu
83.5%
90.2%,
but
beyond
did
not
change
this
response
significantly.
Although
varying
extractant
concentration
silicone
oil
studied
range
affect
extraction,
it
noticeably
led
an
increase
barrier
recovery.
Furthermore,
a
nine-step
AASX
system
was
applied
comprehensively
evaluate
solution.
Moreover,
impressive
95.1%
recovery
(from
solution
containing
890
Cu,
12.32
g/L
Fe,
2.64
Zn,
4.1
Mn)
achieved
with
selectivity
ratios
149.6,
153.0,
93.5,
Cu/Fe,
Cu/Zn,
Cu/Mn,
respectively.
It
could
be
concluded
is
efficient
promising
method
solutions
derived
secondary
resources,
low-grade
ores,
acid
mine
drainages.
Dalton Transactions,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
Phosphoryl
podands
of
neutral
type
with
a
flexible
ethylene
glycol
chain
and
diphenylphosphorylmethyl
end
groups
are
known
for
their
complexation
properties
towards
various
cations.
In
this
work,
the
process
between
1,3-bis(diphenylphosphoryl)-2-oxapropane
(L)
lanthanide
ions
was
studied.
Namely,
stability
constants
complexes
L
in
acetonitrile
were
estimated
by
method
spectrophotometric
titration.
It
found
that
Ln
Minerals,
Journal Year:
2024,
Volume and Issue:
14(11), P. 1167 - 1167
Published: Nov. 17, 2024
The
extraction
of
lanthanides(III)
from
aqueous
nitric
acid
solutions
with
novel
unsymmetrical
diglycolamide
extactant,
N,N′-dimethyl-N,N′-dicyclohexyldiglycolamide
(DMDCHDGA)
into
bis(trifluoromethylsulfoyl)imide-based
ionic
liquids
(ILs),
namely
1-butyl-3-methylimidazolium
bis(trifluoromethylsulfonyl)imide
([C4mim][Tf2N]),
1-octyl-3-methylimidazolium
([C8mim][Tf2N]),
benzyltriethylammonium
([N222Bn][Tf2N])
methyltrioctylammonium
([N1888][Tf2N]),
and
their
mixtures
molecular
organic
diluent
1,2-dichloroethane
(DCE),
is
studied.
DMDCHDGA
has
been
shown
to
interact
components
the
IL
[C4mim][Tf2N].
effect
HNO3
concentration
in
phase
on
Ln(III)
ions
stoichiometry
extracted
complexes
determined,
mechanism
a
system
[C4mim][Tf2N]
discussed.
It
that
efficiency
intragroup
selectivity
significantly
higher
than
when
using
its
symmetric
analog
TODGA.
