Development of a coupled metal transport-speciation model for surface aquatic systems and its extension to soil.
Published: 2005
Language: eng
Number of pages: 168
Description: A coupled metal fate-TRANsport and SPECiation/complexation model, TRANSPEC, was developed to account for the effects of ambient chemistry on metal dynamics. TRANSPEC is a general model applicable to most cationic metals and surface aquatic systems. The model loosely, sequentially couples a speciation/complexation module and a fate-transport module using two-step, non-iterative method. The speciation/complexation module assumes equilibrium partitioning and is constructed using a commercially available geochemical tool. The fate module is based on the multi-species, fugacity/aquivalence concept of Diamond et al. (1992). The steady-state, pseudo-steady-state, and unsteady-state versions of the model were used to assess Zn dynamics in a mine impacted lake. Sensitivity of model results to a geochemical tool selected was evaluated by developing two versions of the model using WHAM and MINEQL+. The utility of TRANSPEC in the development of a Unit World Model for metals was explored for five metals in three lakes that vary in their trophic states. Finally, the model was extended for soil as a step towards a fully developed multi-media, multi-species metal movement model. The extended model termed as TRANSPEC-II was illustratively applied to mine impacted Kelley Lake watershed soil in Sudbury, Ontario, Canada.
Notes: Source: Dissertation Abstracts International, Volume: 66-10, Section: B, page: 5607.

Thesis (Ph.D.)--University of Toronto, 2005.

Electronic version licensed for access by U. of T. users.