Coal
gangue,
as
a
byproduct
of
coal
mining
and
washing,
has
experienced
significant
surge
in
production
due
to
escalating
energy
demands.
The
extensive
accumulation
gangue
resulted
challenges,
including
resource
wastage
severe
environmental
contamination.
To
better
understanding
the
current
research
landscape,
hotspots,
emerging
trends
comprehensive
utilization
we
employed
CiteSpace
bibliometric
software
visually
analyze
200
articles
published
Web
Science
Core
Collection
from
2004
2023.
majority
these
publications
(85%)
were
between
2019
2023,
with
most
originating
China.
This
study
used
cooperative
network
analysis
examine
synthesize
contributions
different
institutions
scholars
on
examining
gangue.
By
employing
advanced
techniques
such
keyword
co-occurrence
cluster
analysis,
our
delves
into
dynamic
hotspots
this
field
over
time
periods.
Through
trend
situation
analyses,
future
directions
for
are
proposed,
aim
inspiring
relevant
guiding
policy
formulation.
International Journal of Coal Science & Technology,
Год журнала:
2025,
Номер
12(1)
Опубликована: Апрель 19, 2025
Abstract
Coal-based
soild
wastes
(CBSWs)
are
industrial
byproducts
that
can
be
harmful
to
the
environment.
The
exploitation
and
utilization
of
CBSWs
offer
societal
advantages
such
as
resource
conservation,
pollution
reduction,
cost-effective
production.
However,
environmentally
sustainable
management
remains
a
worldwide
challenge
due
substantial
production
volume
limited
disposal
capacity
CBSWs.
physicochemical
properties
summarized,
including
fly
ash,
coal
gangue
gasification
slag.
It
also
presents
current
global
applications
status
resources
examines
market
supply
demand.
Subsequently,
paper
provides
an
overview
studies
on
ways
utilise
CBSWs,
highlighting
primary
avenues
which
mainly
from
fields
chemical
materials,
metallurgy
agriculture.
Furthermore,
comparative
evaluation
various
methods
for
recovery
is
conducted,
outlining
their
respective
disadvantages.
future
development
recycling
processes
discussed.
review
concludes
while
there
growing
need
attention
in
recycling,
its
will
involve
combination
both
large-scale
treatment
refinement
processes.
aims
references
insights
effective
environmental
protection
Future
direction
focus
collaborative
emphasizing
high-value
utilization.
In
addition,
establish
comprehensive
database
based
on-site
practices,
explore
solutions
reduce
transportation
costs,
improve
during
process.
Buildings,
Год журнала:
2025,
Номер
15(2), С. 159 - 159
Опубликована: Янв. 8, 2025
The
recycling
of
coal
gangue
has
considerable
potential
to
produce
secondary
environmental
hazards,
which
significantly
influence
the
high-end
application
in
practical
engineering.
present
study
investigates
effects
activation
treatment
on
physical,
chemical
properties
and
leaching
behavior
gangue.
mineral
composition,
micro-pore
structure
element
were
characterized
by
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM),
Thermogravimetry
Analysis
(TG),
Low-Temperature
Nitrogen
Adsorption
(LTNA)
Inductively
Coupled
Plasma
(ICP).
results
indicate
that
kaolinite
pyrite
experienced
reconstruction
after
600
°C
during
thermal
activation.
density
thermally
activated
is
increased
with
calcination
temperature
as
well
alkalinity
(from
4.8–7.1)
due
burning
organic
oxidation
pyrite.
induced
reduction
macropore
volume
(>50
nm),
enhancement
mesopore
(<5
nm)
volume.
Leachable
Ni,
Cd,
Mn,
Cu,
Zn
Pd
decreased
99%,
67%,
86%,
40%,
99%
93%
at
800
°C,
respectively.
Si
Al
calcined
exhibited
a
high
ability
solution;
leachable
reached
106.4
mg/kg,
while
86.1
mg/kg
48
h
dynamic
leaching.
Frontiers in Environmental Science,
Год журнала:
2025,
Номер
12
Опубликована: Янв. 17, 2025
Three
coal-based
solid
wastes—fly
ash
(FA),
gasification
slag
(GS),
and
coal
gangue
(CG)—were
used
to
prepare
functional
soil
(FGC)
for
the
ecological
restoration
of
mining
areas.
It
not
only
solves
problem
shortage
resources
in
area,
but
also
realizes
resourceful
use
waste.
Investigating
physicochemical
properties
oatgrass
growth
characteristics
revealed
optimal
ratios.
Compared
with
control
(CK)
at
30
d,
average
pH
FGC3
(FA:
50wt%;
GS:
25wt%;
CG:
25wt%)
decreased
from
9.54
8.54,
organic
matter
content
increased
2.57%
7.60%,
available
potassium
ammonium
nitrogen
38.02
2.83
mg⋅kg
−1
53.46
3.21
,
respectively.
Functional
bulk
density
porosity
were
superior
Sandy
somewhere
Ningxia
(SL)
GS
CG
contents
<25wt%.
significantly
improved
agronomic
traits.
CK
plant
height,
stem
thickness,
fresh
weight,
dry
weight
17.68
cm,
0.99
mm,
0.09
g,
0.02
g
27.0
1.26
0.24
0.04
And
chlorophyll
was
by
20.39%
compared
CK.
This
study
verified
feasibility
synergistic
preparation
soils
three
wastes
provides
reference
large-scale
utilization
wastes.