Table 1. Diffusion coefficients in electrochemically active biofilm models.
Biofilm Diffusion Coefficients | ||||||
---|---|---|---|---|---|---|
Citation | Article | Model Description | Dimensions | Effective |
Spatial
Variability |
Temporal
Variability |
57, 58 | Picioreanu et al., 2007 and 2008 | Biofilm-based microbial fuel cells | 1D,2D,3D | Yes | None | None |
59 | Marcus et al., 2007 | Conduction-based biofilm anode (Nernst-Monod) | 1D | Yes | None | None |
60 | Picioreanu et al., 2010 | pH and electrode geometry in microbial fuel cell | 2D | No | None | None |
61 | Marcus et al., 2010 | Electromigration impact on biofilm anode (PCBIOFILM) | 1D | Yes | Yes* | None |
62 | Marcus et al., 2011 | Biofilm-based microbial electrolysis cell (PCBIOFILM) | 1D | Yes | None | None |
63 | Strycharz et al., 2011 | Cyclic voltammetry of Geobacter biofilm | 1D | No† | None | None |
64 | Merkey and Chopp, 2012 | Anode geometry in microbial fuel cell | 2D | Yes | None | None |
This model provides qualitative analysis of EAB cyclic voltammograms and uses diffusion coefficient values several orders of magnitude larger than realistic values.
The consideration of migration causes an apparent change in the diffusion coefficient of charged solutes based on the electric field magnitude, which is a function of distance in this model.