Reactive solute transport in acidic streams
Water, Air, & Soil Pollution
By: R. E. Broshears
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Abstract
Spatial and temporal profiles of Ph and concentrations of toxic metals in streams affected by acid mine drainage are the result of the interplay of physical and biogeochemical processes. This paper describes a reactive solute transport model that provides a physically and thermodynamically quantitative interpretation of these profiles. The model combines a transport module that includes advection-dispersion and transient storage with a geochemical speciation module based on MINTEQA2. Input to the model includes stream hydrologic properties derived from tracer-dilution experiments, headwater and lateral inflow concentrations analyzed in field samples, and a thermodynamic database. Simulations reproduced the general features of steady-state patterns of observed pH and concentrations of aluminum and sulfate in St. Kevin Gulch, an acid mine drainage stream near Leadville, Colorado. These patterns were altered temporarily by injection of sodium carbonate into the stream. A transient simulation reproduced the observed effects of the base injection.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Reactive solute transport in acidic streams |
| Series title | Water, Air, & Soil Pollution |
| DOI | 10.1007/BF00619281 |
| Volume | 90 |
| Issue | 1-2 |
| Year Published | 1996 |
| Language | English |
| Publisher | Kluwer Academic Publishers |
| Contributing office(s) | Toxic Substances Hydrology Program |
| Description | 10 p. |
| First page | 195 |
| Last page | 204 |
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