Separations,
Journal Year:
2025,
Volume and Issue:
12(4), P. 98 - 98
Published: April 15, 2025
Adsorption
is
a
popular
method
for
the
recovery
of
low-grade
lithium.
It
low-cost
and
highly
efficient
way
to
treat
solutions
with
low
lithium
concentrations.
The
impurity
content
determines
industrial
application.
This
study
investigated
novel
strategy
remove
divalent
cations
from
desorption
solution
containing
Mg2+,
Ca2+,
Mn2+,
generated
by
manganese
absorbent
using
an
organophosphoric
acid,
followed
precipitation
carbonate
concentrated
raffinate
evaporation.
Di(2-ethylhexyl)phosphoric
acid
(P204)
was
selected
as
preferred
extractant.
saponification
degree
were
determined,
extraction
parameters
(pH,
extractant
concentration,
phase
ratio)
investigated.
A
three-stage
countercurrent
process
tested.
Removal
efficiencies
Mn2+
manganese-containing
exceeded
99%,
leaving
<1.0
mg/L
in
raffinate.
evaporated
>23
g/L
total
concentration
lithium-rich
approximately
10.0
mg/L.
Further
conversion
sodium
carried
out
prepare
battery-grade
product
purity
99.83%.
present
work
may
provide
means
solution.
Journal of the Chinese Chemical Society,
Journal Year:
2024,
Volume and Issue:
71(9), P. 978 - 1007
Published: July 24, 2024
Abstract
Dirty
dozen
chemicals
(DDCs)
are
a
group
of
12
extremely
toxic
that
were
recognized
at
the
Stockholm
convention
in
2001
for
their
severe
impact
on
ecosystem
and
human
health.
Despite
embargo
restraint
placed
DDCs
usage,
these
continue
to
find
way
into
because
they
still
secretly
or
openly
applied
by
many
nations,
especially
African
regions.
Moreover,
can
be
perceived
where
have
been
employed
previously
before
treaty
due
persistent
profile.
This
study
aimed
critically
review
original
works
directed
toward
removal
various
dirty
using
covalent
metal–organic
frameworks
(COFs
MOFs).
Specifically,
this
study,
COFs/MOFs
composites
with
remarkably
tailored
adsorptive
profiles
evaluated
adsorption
efficiency
different
DDCs.
In
addition,
effect
operating
parameters
importance
environmentalists
stakeholders
optimization
purposes
was
empirically
discussed.
also
fills
knowledge
vacuums
about
COF/MOF‐DDCs
process,
offers
insights
reusability
potential,
fundamental
mechanism,
isotherm,
kinetic
modeling,
framework
future
studies.
Findings
from
revealed
COF
MOF
high
DDC
capacity
potential
attributed
admirable
porosity
existence
plethora
oxygen‐rich
functional
groups
allow
better
interactions
through
chelation,
halogen
bonding,
H‐bonding,
π‐π
stacking.
points
upscaling
remediation
technique.
Future
researchers
need
direct
more
efforts
use
density
theory
mechanism
interpretation,
exploration
hybrid
technology,
cost
analysis,
scalability,
thermodynamics,
adsorption,
desorption
modeling.
Hydrogen
titanium
oxide
(HTO)
is
a
promising
material
to
efficiently
extract
lithium
ions
from
oil,
gas,
or
geothermal
brines.
Tremendous
experimental
efforts,
including
doping
selective
foreign
elements
into
HTO
materials,
have
been
performed
improve
their
performances;
however,
clear
mechanistic
understanding
still
missing.
Here,
ab
initio
molecular
dynamics
(AIMD)
simulations
are
carried
out
investigate
the
effects
of
wide
range
possible
dopants
(Pb,
Zr,
Sn,
Mo,
Fe,
Mn,
Ni,
and
Si)
on
adsorption,
which,
best
my
knowledge,
never
studied
in
literature.
Simulation
results
show
that,
for
dopant
sizes
larger
than
Ti
Mo),
maximum
Li
adsorption
capacity
limited
by
characteristic
Li-poor/Li-rich
phase
transition;
smaller
(Fe,
Si),
decreases
due
early
crystal
volume
shrinkages
that
result
free
energy
minimum.
These
helpful
guiding
future
research
directions
more
efficient
lithium-ion
sieve
materials.
Separations,
Journal Year:
2025,
Volume and Issue:
12(4), P. 98 - 98
Published: April 15, 2025
Adsorption
is
a
popular
method
for
the
recovery
of
low-grade
lithium.
It
low-cost
and
highly
efficient
way
to
treat
solutions
with
low
lithium
concentrations.
The
impurity
content
determines
industrial
application.
This
study
investigated
novel
strategy
remove
divalent
cations
from
desorption
solution
containing
Mg2+,
Ca2+,
Mn2+,
generated
by
manganese
absorbent
using
an
organophosphoric
acid,
followed
precipitation
carbonate
concentrated
raffinate
evaporation.
Di(2-ethylhexyl)phosphoric
acid
(P204)
was
selected
as
preferred
extractant.
saponification
degree
were
determined,
extraction
parameters
(pH,
extractant
concentration,
phase
ratio)
investigated.
A
three-stage
countercurrent
process
tested.
Removal
efficiencies
Mn2+
manganese-containing
exceeded
99%,
leaving
<1.0
mg/L
in
raffinate.
evaporated
>23
g/L
total
concentration
lithium-rich
approximately
10.0
mg/L.
Further
conversion
sodium
carried
out
prepare
battery-grade
product
purity
99.83%.
present
work
may
provide
means
solution.
