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Chemical factors that influence the availability of iron and manganese in aqueous systems

J. D. Hem
Chemical factors that influence the availability of iron and manganese in aqueous systems
Special Paper - Geological Society of America (1972) (140): 17-24

Abstract

The principal factors affecting aqueous chemical behavior of iron and manganese are shown in Eh-pH diagrams, designed to show predominant solute species, stable solid forms and solubility. Simple systems which contain water and the metal, and more complicated systems which contain fixed total amounts of one to four additional anions are considered. Relatively small shifts in Eh or pH can greatly change the equilibrium solubility of the metals. Some complexes, especially ferric fluoride and probably organic ferrous and ferric complexes, may strongly influence the solubility of iron. Because iron and manganese have low solubilities in oxidizing systems at pH levels near or little above neutrality, small shifts in Eh or pH, and complexing effects, may be very important in making the metals available to plants and animals.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Issue: 140
Serial Info: Geochemical environment in relation to health and disease
Title: Chemical factors that influence the availability of iron and manganese in aqueous systems
Author(s): Hem, J. D.
Affiliation: U. S. Geol. Surv., Menlo Park, Calif., United States
Pages: 17-24
Published: 1972
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Accession Number: 1976-000372
Categories: Geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1976
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