What is the bio-concentration factor for inorganic substances?
LCA-Tox uses 1.0 as the bio-concentration factor for inorganic substances. The reason for this is that the concentration of inorganic substances is an inverse function of the concentration. Organisms concentrate more effectively at low ambient concentrations than at high concentrations. There are a few metals that exist in aquatic systems predominantly as organic forms that do bio-accumulate (e.g. mercury and tin). Future versions will evaluate bio-concentration factors for these elements.
