L1 /
12
CH3041
RIVER WATER
COMPOSITION
• There is a
considerable difference between the crustal
composition and the average riverwater
composition. (dissolved
cations)
Element Crust Riverwater
Si 277 (g / kg) 4.5 (mg / kg)
Al 81
0.05
Fe 50 0.04
Ca 36 13.4
Na 28 5.2
K 26 1.3
Mg 21 3.4
• This difference is due largely to the different chemistry of the elements.
