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Biodegradation during Contaminant Transport in Porous Media

V. The Influence of Growth and Cell Elution on Microbial Distribution

^a Dep. of Hydrology and Water Resources, Univ. of Arizona, 429 Shantz, Tucson, AZ 85721
^b Dep. of Soil, Water, and Environmental Science, Univ. of Arizona, 429 Shantz, Tucson, AZ 85721

View larger version (32K): [in a new window]   Fig. 1. Salicylate breakthrough curves as a function of (A) input salicylate concentration and (B) initial cell density. The arrows correspond to the completion of salicylate injection. A * indicates the estimated end of the effect of lag on salicylate transport behavior, denoted by the distinct changes in the slope of salicylate breakthrough curves.

View larger version (23K): [in a new window]   Fig. 2. Cell elution for the lowest cell-density experiment (Table 1, Experiment 8) and the accompanying salicylate breakthrough curve.

View larger version (34K): [in a new window]   Fig. 3. Cell elution behavior as a function of (A) salicylate input concentration and (B) cell density. Zero pore volumes represents the initiation of the salicylate pulse.