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Adsorption of Fe to bacterial surfaces is known to occur and is a possible precursor to biomineralization of Fe-oxides. However, the extent of adsorption and the resulting effect on saturation conditions in the presence of bacteria have not been adequately explored. We conduct four types of experiments: (1) kinetic precipitation-type experiments with and without bacteria at starting Fe concentrations...
We report a detailed study of trace metals in groundwaters from the Somma-Vesuvius volcanic complex and present a model of the chemical processes that control the fate of these components during gas–water–rock interactions. Trace metal concentrations in Vesuvian groundwaters range from 0.01 to 0.1 μg/l for ultra-trace elements (Sb, Cs, Co, Cd, and Pb) up to 0.1–10 mg/l for minor elements (Fe and Sr),...
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