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Chemical Modeling of Acid Waters


Aqueous chemical models have become popular tools for the interpretation of natural water chemistry. Unfortunately, these models have deficiencies because of (1) incorrect or inconsistent thermodynamic data, (2) invalid assumption regarding the equilibrium state, (3) inappropriate or invalidated corrections for nonideality, (4) inadequate expressions for temperature dependence, (5) invalidated limitations for ionic strength, composition and temperature, and (6) lack of data on solid solution solubility. The plethora of models and databases has prompted federal agencies, especially hazardous waste and nuclear waste managers, to request geochemical code validation. Acid mine waters are a major source of water pollution and provide one [...]

Child Items (87)


Contact :
Office of the Chief Scientist for Water
Principal Investigator :
D Kirk Nordstrom

Attached Files

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Chemical Modeling of Acid Waters.xml 183.08 KB application/xml

Project Extension



  • USGS National Research Program



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