Compounds,
Год журнала:
2024,
Номер
4(4), С. 679 - 687
Опубликована: Ноя. 4, 2024
Advancements
in
membrane
separation
techniques
will
expand
the
applications
and
requirements
for
highly
specialized,
inventive,
efficient,
resistant
materials.
The
selective
of
rare
earth
elements
(REEs)
is
one
expanding
membrane-based
techniques,
as
their
use
becoming
more
widespread.
Membrane
are
increasingly
desired
environmentally
friendly,
straightforward
methods
treating
wastewater
separating
metals.
For
REEs,
an
innovative
impregnated
mixed-matrix
(IMMM)
technique
was
developed
this
study.
It
provides
a
selective,
reusable
method
that
suitable
industrial
applications.
Terbium
selectively
adsorbed
from
other
REEs
using
organophosphorus
IMMM
with
loading
capacity
113.2
mg/g
3
h
reused
three
times
without
destroying
initial
membrane.
Solvent
impregnation
thought
to
offer
specific
chelation
sites
terbium
separation.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 19, 2024
Abstract
The
rare
earth
elements
(REEs)
are
critical
resources
for
many
clean
energy
technologies,
but
difficult
to
obtain
in
their
elementally
pure
forms
because
of
nearly
identical
chemical
properties.
Here,
an
analogue
macropa,
G‐macropa,
was
synthesized
and
employed
aqueous
precipitation‐based
separation
Nd
3+
Dy
.
G‐macropa
maintains
the
same
thermodynamic
preference
large
REEs
as
shows
smaller
stability
constants.
Molecular
dynamics
studies
demonstrate
that
binding
affinity
differences
these
chelators
is
a
consequence
presence
or
absence
inner‐sphere
water
molecule,
which
alters
donor
strength
macrocyclic
ethers.
Leveraging
small
REE
we
within
solutions
,
addition
HCO
3
−
selectively
precipitates
2
(CO
)
leaving
−G‐macropa
complex
solution.
With
this
method,
remarkably
high
factors
841
741
achieved
50
:
75
25
mixtures.
Further
involving
:Dy
ratios
95
5
authentic
magnet
waste
also
afford
efficient
well.
Lastly,
recovered
via
crystallization
with
HCl
used
subsequent
extractions,
demonstrating
its
good
recyclability.
Membranes,
Год журнала:
2023,
Номер
13(10), С. 839 - 839
Опубликована: Окт. 21, 2023
The
systematic
increase
in
the
use
of
rare
earth
elements
(REEs)
various
technologically
advanced
products
around
world
(e.g.,
electronic
devices),
growing
amount
waste
generated
by
high-tech
materials,
and
limited
resources
naturally
occurring
REE
ores
resulted
an
intensive
search
for
effective
environmentally
safe
methods
recovering
these
elements.
Among
methods,
techniques
based
on
application
types
liquid
membranes
(LMs)
play
important
role,
primarily
due
to
their
high
efficiency,
simplicity
membrane
formation
use,
utilization
only
small
amounts
hazardous
reagents,
possibility
simultaneous
extraction
back-extraction
reusing
after
regeneration.
However,
because
both
primary
secondary
sources
waste)
REEs
are
usually
complex
contain
a
wide
variety
components,
selectivity
efficiency
LMs
depend
many
factors
composition
form
membrane,
nature
recovered
ions,
feed
stripping
phases,
etc.),
new
being
developed
that
“tailored”
properties
character
solution
which
they
occur.
This
review
describes
latest
achievements
(since
2019)
related
recovery
range
with
(supported
(SLMs),
emulsion
(ELMs),
polymer
inclusion
(PIMs)),
particular
emphasis
fall
within
trend
eco-friendly
solutions.
