The Role of Oxygen Transfer in Acid Mine Drainage (AMD) Treatment

A study was conducted to evaluate two chemical models of iron oxidation. The first model was proposed by U. S. EPA in 1983 for use in the design of acid mine drainage (AMD) treatment systems. This model expresses the oxidation rate as a function of ferrous iron, oxygen concentrations, and pH. The se...

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Bibliographic Details
Published in:Water environment research 1992-09, Vol.64 (6), p.817-823
Main Authors: Hustwit, Craig C., Ackman, Terry E., Erickson, Patricia E.
Format: Article
Language:English
Subjects:
01 COAL, LIGNITE, AND PEAT
010800 - Coal, Lignite, & Peat- Waste Management
540320 - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-)
ACID MINE DRAINAGE
Aeration
CHEMICAL REACTIONS
CONCENTRATION RATIO
ELEMENTS
ENVIRONMENTAL SCIENCES
Hydroxides
IRON
Iron mining
MATHEMATICAL MODELS
METALS
mine drainage
Modeling
OXIDATION
Oxygen
oxygen transfer
Research Papers
Sodium
Transfer rates
TRANSITION ELEMENTS
Water quality
WATER TREATMENT
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Summary:A study was conducted to evaluate two chemical models of iron oxidation. The first model was proposed by U. S. EPA in 1983 for use in the design of acid mine drainage (AMD) treatment systems. This model expresses the oxidation rate as a function of ferrous iron, oxygen concentrations, and pH. The second model was proposed by the U. S. Bureau of Mines and expresses the oxidation rate as a function of a treatment system's oxygen transfer rate. The findings of the study were that the model based on oxygen transfer was accurate in predicting oxidation rates over a wide range of initial ferrous iron concentrations. The predictions of the EPA model were inaccurate in modeling iron oxidation.
ISSN:1061-4303
1554-7531
DOI:10.2175/WER.64.6.10