Distribution and leaching characteristics of metal elements in coal gasification fine Slag: Insights into inorganic and organic acid systems
Separation and Purification Technology,
Год журнала:
2025,
Номер
unknown, С. 131517 - 131517
Опубликована: Янв. 1, 2025
Язык: Английский
Electron microbeam investigations of the spent ash from the pilot-scale acid extraction of rare earth elements from a beneficiated Kentucky fly ash
International Journal of Coal Geology,
Год журнала:
2025,
Номер
unknown, С. 104738 - 104738
Опубликована: Март 1, 2025
Язык: Английский
Synthesis of tobermorite using coal fly ash and its utilization in highly efficient CO2 adsorption
Separation and Purification Technology,
Год журнала:
2024,
Номер
358, С. 130382 - 130382
Опубликована: Ноя. 7, 2024
Язык: Английский
Fate of Ca2+ and metal impurities of a typical coal fly ash in amino acid mediated CO2 mineralization and simultaneous CaCO3 recovery
Separation and Purification Technology,
Год журнала:
2024,
Номер
353, С. 128610 - 128610
Опубликована: Июнь 28, 2024
Язык: Английский
Application of Taguchi Method for Optimization of Precious Metal Recovery from Coal Fly Ash
Iga Trisnawati,
Fasya Mazaya Asrikania,
Fauziah Ulfah Ajri
и другие.
IOP Conference Series Earth and Environmental Science,
Год журнала:
2025,
Номер
1486(1), С. 012029 - 012029
Опубликована: Апрель 1, 2025
Abstract
Coal
fly
ash
(CFA)
is
considered
to
be
a
promising
secondary
source
for
precious
metal
recovery.
One
application
in
the
recovery
of
metals
from
CFA
through
an
acid-leaching
process
that
begins
with
roasting
or
alkali
fusion.
This
research
studies
mineral
content
coal
Tarahan
Steam
Power
Plant,
Lampung,
3-stage
hydrometallurgy
(alkali
fusion,
water
leaching,
and
acid
leaching).
consists
more
than
20
different
elements,
main
elements
this
being
dominated
by
Fe,
Si,
Ca,
Al
percentages
34.915%,
26.04%,
15.83%,
12.396%,
respectively.
It
also
has
summary
concentration
SiO2,
Al2O3,
Fe2O3
78.16%
CaO
12.6%.
Roasting
NaOH
at
400
°C
can
break
down
aluminum
silicate
structure
into
water-soluble
phase.
More
70%
(Si,
Al,
Mg)
are
soluble
leaching.
The
leaching
was
optimized
Taguchi
orthogonal
array
L16
experimental
design.
optimum
conditions
each
element
were
obtained
combinations.
Among
four
types
acids
used
study,
citric
suitable
Light
Rare
Earth
Elements
(Ce,
Nd,
Pm)
recovery,
acetic
Gd
Sm,
sulfuric
Heavy
(Yb
Er).
average
condition
3
M
concentration,
120
°C,
Solid
Liquid
(S/L)
ratio
1:40,
temperature
S/L
most
influential
factors
on
ash.
Язык: Английский
Recovery of valuable elements from rare earth molten salt electrolytic slag via roasting defluorination with saturated steam
Journal of environmental chemical engineering,
Год журнала:
2025,
Номер
13(3), С. 116930 - 116930
Опубликована: Май 5, 2025
Язык: Английский
Closed-loop valorization of fly ash: Integrating selective metal extraction and multi-solid-waste geopolymer synthesis for circular economy
Separation and Purification Technology,
Год журнала:
2025,
Номер
374, С. 133664 - 133664
Опубликована: Май 21, 2025
Язык: Английский
Efficient Separation of Adjacent Rare Earths in One Step by Using Ion‐microporous Metal–Organic Frameworks
An‐Min Song,
Meng‐Jie Yang,
Zhi Wu
и другие.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 20, 2024
Abstract
High‐purity
rare
earth
(REEs)
materials
are
key
raw
for
the
development
of
cutting‐edge
technologies.
However,
due
to
similar
physical
and
chemical
properties,
separating
adjacent
REEs
from
actual
samples
faces
a
formidable
challenge.
To
overcome
this
challenge,
an
ion‐microporous
metal–organic
framework
(ATZ‐BTC‐Zn;
MOFs)
is
designed
synthesized,
featuring
densely
packed
nano‐trap
pockets
constructed
non‐coordinating
carboxyl
amino
groups.
The
synergistic
effect
open
suitable
ions
channel
in
ATZ‐BTC‐Zn
highly
responsive
size
variation
lighter
REEs.
Notably,
configuration
Zn(H
2
O)
6
2+
counterion
lanthanide
hydrated
(Ln(H
3+
),
facilitating
efficient
ion
exchange
between
them
high‐speed
transport
channel.
This
accelerates
diffusion
within
MOF
pores,
enhancing
utilization
active
adsorption
sites
promoting
capture
by
nano‐traps.
binary
model
experiments
show
high
separation
factors
(
SF
La/Nd
=
908,
Ce/La
543),
demonstrating
one
step.
capability
achieves
selective
tailings
wastewater,
providing
strategy
infer
compatibility
MOFs
Язык: Английский
Synchrotron-aided exploration of REE recovery from coal fly ashes within a Canadian context
Chemosphere,
Год журнала:
2024,
Номер
unknown, С. 143562 - 143562
Опубликована: Окт. 1, 2024
Язык: Английский
Desorption of Cadmium from Cocoa Waste Using Organic Acids
Foods,
Год журнала:
2024,
Номер
13(24), С. 4048 - 4048
Опубликована: Дек. 15, 2024
This
study
evaluated
the
desorption
of
cadmium
(Cd)
from
cocoa
waste-derived
flour
using
organic
acids.
Cocoa
pods
were
collected
Antioquia
and
Casanare,
Colombia,
to
analyze
geographical
Cd
content
its
distribution
within
pod
tissues.
Acid
selection
was
performed
a
multi-criteria
decision-making
(MCDM)
matrix,
assessed
through
full
factorial
23
experimental
design,
considering
acid
concentration,
pulp
density,
agitation
speed.
Additionally,
oxidation–reduction
potential
(ORP)
monitored
as
an
indicator
electrochemical
dynamics
process.
The
results
indicated
that
Casanare
exhibited
higher
concentrations
(1.63
±
0.20
ppm)
compared
with
those
(0.87
0.22
ppm),
49.31%
metal
being
accumulated
in
pod.
Parameters
citric
at
0.5
M,
5
g/L
120
rpm
found
be
optimal
for
process,
achieving
over
95%
efficiency.
Based
on
ORP
monitoring,
heuristic
proposed
determine
contact
time
during
leaching.
work
outlines
scalable
process
desorption,
adding
value
industry
waste
applications.
Язык: Английский