Agriculture & Biology
river water
100%
marshes
83%
sediments
73%
sulfates
54%
chemical equilibrium
50%
pyrite
45%
calcite
42%
sewage
37%
nitrates
26%
smectite
24%
iron
23%
cation exchange
20%
calcium
19%
eutrophication
18%
energy efficiency
18%
water quality
15%
pollutants
15%
organic matter
14%
chlorides
13%
water
13%
Japan
12%
minerals
11%
sodium
11%
oxidation
11%
oxygen
11%
degradation
9%
nitrogen
9%
Earth & Environmental Sciences
marsh
76%
river water
72%
porewater
55%
sulfate
44%
chemical
38%
sediment
37%
pyrite
28%
sewage
27%
calcite
26%
nitrate
23%
iron
20%
water
19%
calculation
17%
supersaturation
16%
formation mechanism
16%
pollutant source
16%
smectite
16%
energy efficiency
16%
ion exchange
14%
eutrophication
14%
isotopic composition
13%
chloride
12%
sodium
11%
dissolution
11%
decomposition
11%
organic matter
10%
contamination
10%
water quality
10%
oxidation
10%
oxygen
10%
nitrogen
9%
mineral
8%