Earth & Environmental Sciences
black shale
73%
selenium
70%
jarosite
65%
mobilization
63%
arsenic
57%
uranium
56%
trace element
48%
shale
40%
phosphate
39%
groundwater
23%
oxide
19%
mineralization
19%
element mobility
18%
acid mine drainage
14%
regolith
14%
environmental assessment
13%
goethite
13%
shale gas
13%
environmental management
12%
fixation
12%
iron oxide
12%
hydraulic fracturing
12%
resource management
12%
substitution
11%
lithology
10%
weathering
10%
penetration
10%
remediation
10%
environmental impact
9%
crust
9%
sulfate
9%
contamination
8%
in situ
7%
coast
7%
removal
6%
temperature
4%
Engineering & Materials Science
Selenium
100%
Arsenic
94%
Uranium
74%
Shale
73%
Trace elements
53%
Phosphates
32%
Groundwater
25%
Deposits
21%
Oxides
12%
Lithology
10%
Environmental management
10%
Iron oxides
9%
Shale gas
9%
Remediation
9%
Weathering
8%
Hydraulic fracturing
8%
Sulfates
8%
Coastal zones
7%
Drainage
7%
Substitution reactions
7%
Contamination
6%
Environmental impact
6%
Acids
6%
Chemical analysis
4%
Temperature
2%
Chemical Compounds
Black
57%
Groundwater
41%
Chemical Element
39%
Compound Mobility
29%
Phosphate
25%
Acid Mine Drainage
19%
Weathering
15%
Oxide
13%
Remediation
13%
Surface
12%
Iron Oxide
12%
Sulfate
9%
Substitution Reaction
8%
Pressure
7%
Environment
7%
Gas
6%