Keyphrases
Rare Earth Elements
100%
Acid Mine Drainage
81%
Respirable Coal Mine Dust
75%
Coal Preparation Plant
62%
Rare Earth Element Concentrations
60%
Trace Elements
48%
Coal Workers' Pneumoconiosis
44%
Mineralogy
42%
Selective Precipitation
37%
Respirable Dust
37%
Appalachia
35%
Dust
34%
Mass Concentration
32%
Particle Size
31%
Waste Streams
31%
Comprehensive Characterization
28%
Underground Coal Mine
26%
Ash Content
25%
Inductively Coupled Plasma Mass Spectrometry
25%
Coal Waste
24%
Rare Earth
24%
Central Appalachia
23%
Metal Elements
23%
Density Fractions
23%
Precipitation Process
22%
Environmental Concern
22%
Yttrium
21%
Long-term Leaching
21%
Physical Separation
21%
Waste Materials
21%
Total Rare Earth
20%
Acid Mine Drainage Treatment
20%
Waste Assessment
18%
Staged Precipitation
18%
Waste Disposal
18%
Scaling Laws
18%
Chemical-free
18%
Environmental Issues
18%
Desorption
18%
Scale Model
18%
Dust Sources
18%
Appalachian Mountains
18%
Leachants
18%
Leachate
18%
Mechanistic Effect
18%
Mining Industry
18%
Base Metals
18%
Precipitation Pattern
18%
Eastern USA
18%
Toxicological Studies
18%
Engineering
Coal Mine
85%
Critical Element
48%
Leaching
43%
Flowsheet
32%
Coal Preparation
28%
Leaching Test
25%
Leachability
24%
Ash Content
24%
Physical Separation
22%
Scaling Law
22%
Resurgence
21%
Anthracite
18%
Screening Test
18%
Metrics
18%
Optimum Number
18%
Mineralisation
18%
Ash Sample
18%
Roasting Time
18%
Waste Processing
18%
Sludge Treatment
18%
Mass Concentration
18%
Surface Area Ratio
18%
Product Stream
18%
Numerical Modeling
18%
Physicochemical Property
18%
Surface Water
18%
Conventional Method
18%
Air Velocity
14%
Test Data
13%
Ray Diffraction
13%
Extraction Process
13%
Diesel Exhaust
12%
Particle Surface
12%
Processing Plant
12%
Oxidization
11%
Environmental Concern
9%
Test Result
9%
Full Scale
9%
Processing Time
9%
X-Ray Fluorescence
9%
Chemical Reduction
9%
Net Present Value
9%
Microwave Heating
9%