Table 4. Compositions of Brines

Table 4. Compositions of Brines
Composition of average seawater and brine from Great Salt Lake, Utah (from Drever, 1997) and freshwater (rain and river water; from Hem, 1985). The units are mg/kg, which gives the mass (in milligrams) of an ion (like sodium) in one kilogram of water. In the ocean and the Great Salt Lake, evaporation removes water, leaving other ions behind. This concentrates the ions (as you can see by comparing the amounts of ions in seawater and the Great Salt Lake with the ions in rain water and the Mississippi River). Note that brines, like that in the Great Salt Lake, are saltier than seawater; and while all brines are saltier than seawater, different brines will contain different amounts of certain ions.

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Provenance
Table created by Joy Branlund, Southwestern Illinois College with data from: Drever, James I., 1997, The geochemistry of natural waters: Surface and groundwater environments, 3rd edition, Prentice Hall and
Hem, John D., 1985, Study and interpretation of the chemical characteristics of natural water, 3rd edition, USGS Water Supply Paper 2254
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