L1 /
12
CH3041
(S %crust =
0.03%)
THE SULPHUR CYCLE
1.3 x 109
8 x 109
Sedimentary Rocks
Sedimentary Rocks
4
x 109 kg S
x 109 kg
S/a
Soluble SO42-
Natural
104
Human 109
Closely
linked to the O cycle
SO42- -
SO2
Natural 20
Human 93
Human 93
SO2
DMS
H2SO4
S dusts
Natural 10
Man 10
Natural 10
Man 10
SO2
H2S
Na2SO4
3 x 105
Soil
Soil
