Bulletin of the Korean Chemical Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 19, 2024
Abstract
To
develop
an
adsorbent
for
Li
+
recovery
from
seawater
and/or
spent
lithium
batteries,
a
benzo‐12‐crown‐4
ether
(B12C4)
moiety
was
immobilized
with
silica
(immobilization
yield:
0.70
meq
g
−1
).
Compared
to
pure
silica,
the
resulting
(FB12C4‐SG)
had
reduced
Brunauer–Emmett–Teller
surface
area
(500
vs.
180
m
2
)
and
pore
volume
(0.75
0.26
cm
3
The
adsorption
reached
equilibrium
at
31
mg
after
h
(1000
ppm
solution).
behavior
well
explained
by
pseudo‐second‐order
kinetics
Langmuir
model
(maximum
capacity:
33
material
exhibited
/Na
selectivity
factor
of
4.2
high
chemical
stability
under
acidic
regeneration
conditions
(1.0
N
HCl
Crystals,
Journal Year:
2025,
Volume and Issue:
15(2), P. 161 - 161
Published: Feb. 8, 2025
This
study
presents
a
groundbreaking
method
for
extracting
lithium
from
beta-spodumene
while
simultaneously
achieving
the
sustainable
synthesis
of
LTA-type
zeolite,
designated
as
LPM-15,
without
relying
on
organic
solvents
or
calcination.
Lithium
extraction
was
efficiently
performed
using
sodium
salts,
accompanied
by
recycling
mother
liquor,
with
content
in
supernatant
precisely
quantified
via
atomic
absorption
spectroscopy
(AAS).
The
optimized
route
enables
concurrent
production
Li2CO3
and
distinguished
powdered
appearance
well-defined
geometric
framework
unique
cubic
morphology
spherical
facets,
respectively.
To
gain
deeper
insights
into
process,
density
functional
theory
(DFT)
simulations
were
conducted
to
analyze
how
different
cation
exchanges
(Na+
replacing
Al3+,
NH4+
Ca2+
Al3+)
influence
structural
stability
diffusion
dynamics
within
zeolitic
pores
LPM-15.
Additionally,
cation-exchange
capacity
(CEC)
measurements
further
assessed
ion
mobility
LPM-15
framework.
integrative
approach
not
only
sheds
light
fundamental
mechanisms
underpinning
zeolite
but
also
demonstrates
their
versatile
applications,
particular
emphasis
water
purification
technologies.
AIChE Journal,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 24, 2025
Abstract
Sluggish
internal
mass
transfer
within
granulated
adsorbents
constrains
the
efficiency
of
Li
+
extraction
from
low‐grade
salt
lakes.
In
this
study,
diffusion
behavior
simulations
using
finite
element
analysis
indicated
that
reducing
granule
dimensionality
enhanced
in
aluminum‐based
lithium
adsorbents,
with
ionic
strength
as
driving
force.
Hence,
low‐dimensional
adsorbent
granules
(LD‐LDHs)
fast
transport
channels
and
highly
accessible
adsorption
sites
were
directionally
prepared
via
a
wet‐spinning
method.
Adsorption
kinetics
suggested
LD‐LDHs
reduced
resistance
achieved
equilibrium
less
than
30
min,
which
was
significantly
shorter
36
h
required
for
larger
by
conventional
extrusion
molding,
while
maintaining
performance
encapsulated
active
components.
During
continuous
Qarhan
old
brine,
reached
saturation
60
1.8‐fold
increased
working
capacity,
desorption
solution
higher
quality,
favorable
subsequent
carbonate
production
processes.
