Reactive solute transport in acidic streams

Water, Air, & Soil Pollution
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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.

Additional publication details

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