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Sulfate Reduction and Calcium Carbonate Equilibria in a Central California Histosol
Author(s) -
Deverel S. J.,
Whittig L. D.,
Tanji K. K.
Publication year - 1986
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1986.03615995005000050019x
Subject(s) - calcite , bicarbonate , sulfate , chemistry , carbon dioxide , carbonate , calcium carbonate , organic matter , environmental chemistry , solubility , histosol , soil water , mineralogy , inorganic chemistry , soil organic matter , soil science , geology , organic chemistry , soil biodiversity
Sulfate (SO 2‐ 4 ) reduction and bicarbonate (HCO ‐ 3 ) production were studied in three organic soil profiles removed intact from the California Delta area. The water table was maintained at approximately 0.75 m from the soil surface in columns 1.22 m in height. The partial pressure of carbon dioxide ( P CO 2 ) was monitored throughout the experiment. Extracted soil solutions were evaluated with respect to calcite solubility. Sulfate reduction was found to follow first‐order kinetics for three different initial SO 2‐ 4 concentrations. Bicarbonate production followed approximately the stoichiometry of the organic matter oxidation‐SO 2‐ 4 reduction reaction. Soil solutions extracted below the water table were found to be saturated with respect to calcite depending on the P CO 2 and the initial SO 2‐ 4 concentration.