The Sulfur System
Inherent in the discussion in Chap. 2 is the assumption that sulfur deposition will directly increase the concentration of the SO 4 2− ion in solution. The response of the solution concentration to H2SO4 or other forms of sulfur deposition is complicated by biological effects and by the capacity of many soils to retain SO 4 2− . These processes can delay the onset of effects such as base removal, aluminum mobilization, and decreased alkalinity of the percolates for many years or even decades (Lee and Weber 1982). Failure to observe these effects in short- to medium-term experiments may delay, but by no means preclude, the likely long-term consequences in soils and surface waters.
KeywordsBiomass Depo Sition Acidity Immobilization H2SO4
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