Processes affecting the major chemical components of groundwater

Table
Processes affecting the major chemical components of groundwater
component origin*
sodium ion sodium chloride dissolution (some pollutive)
plagioclase weathering
rainwater addition
potassium ion biotite weathering
K-feldspar weathering
biomass decreases
dissolution of trapped aerosols
magnesium ion amphibole and pyroxene weathering
biotite (and chlorite) weathering
dolomite weathering
olivine weathering
rainwater addition
calcium ion calcite weathering
plagioclase weathering
dolomite weathering
dissolution of trapped aerosols
biomass decreases
bicarbonate ion calcite and dolomite weathering
silicate weathering
sulfate ion pyrite weathering (some pollutive)
rainwater addition
chloride ion sodium chloride dissolution (some pollutive)
rainwater addition
hydrogen silicate silicate weathering
*The sources for each constituent are given in approximate order of decreasing importance.
Source: Adapted from Elizabeth Kay Berner and Robert A. Berner, The Global Water Cycle: Geochemistry and Environment, copyright 1987, Table 4.6, p. 170. Reproduced by permission of Prentice Hall, Inc., Englewood Cliffs, N.J.
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