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Unformatted text preview: 100 M polluted river NH 4 + 0.5 M unpolluted river 5 M polluted river PO 4 3-0.5 M unpolluted river 5 M polluted river H 2 SiO 3 1-200 M (no pollution source) trace elements (nM, pM): metals: Fe, Zn, Cu, Cd, Al, Pb, Hg, etc. non-metals: Se, As, etc. Dissolved carbon in natural waters DOM (dissolved organic matter): rain, groundwater 1 mg L-1 lakes and rivers 2 10 mg L-1 wetlands (bogs, marshes) 10 50 mg L-1 ocean: 0.4 2.5 mg L-1 DIC (dissolved inorganic carbon): 0.5 - 2 mM...
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- Spring '11