natwat1 - 100 M polluted river NH 4 + 0.5 M unpolluted...

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Chemical composition of natural waters 1: dissolved constituents natural waters: surface waters: lakes, rivers, oceans groundwater Paradigms: weathering of crustal rocks adds major ions to natural waters biological processes affect the composition of natural waters through the regulation of nutrient concentrations, suspended particle loads, redox conditions, and pH Dissolved species (see Table 13-5, p. 590) major ions ( mM): Na + , K + , Ca 2+ , Mg 2+ , HCO 3 - , Cl - , SO 4 2- , F - Br - ,Sr 2+ (seawater) nutrient species ( μM): NO 3 - , NH 4 + , PO 4 3- , H 2 SiO 3 NO 3 - 10 μM unpolluted river
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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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