FIG 3.

Aqueous Cr(VI) concentration (a) and pH (b) of the COPR leachate in sterilized controls (open symbols) and when inoculated with a late-log-phase culture of a Halomonas isolate from Mono Lake (solid symbols). The black arrows indicate sampling times for solid-phase analysis. Error bars represent the standard deviations of triplicates. (c) Pseudo-first-order Cr(VI) removal rate kinetics, plotted as ln [Cr(VI)] against time, calculated from the averages of triplicate Cr(VI) values of experiments containing resting cells of Halomonas sp. These experiments were performed at a starting pH of 10 and 11.