Colleen M. Hansel

TL;DR: In this article, the authors investigated the pathways and mechanisms of secondary mineralization during dissimilatory iron reduction by a common iron-reducing bacterium, Shewanella putrefaciens (strain CN32), of 2-line ferrihydrite under advective flow conditions.

TL;DR: Predicting the secondary mineralization of ferrihydrite, a process having sweeping influences on contaminant/nutrient dynamics, will need to take into consideration kinetic restraints and transient precursor phases (e.g., lepidocrocite) that influence ensuing reaction pathways.

TL;DR: Investigating changes in the microbial and functional communities within soil aggregates obtained along a soil profile spanning the surface, vadose zone, and saturated soil environments found that the microbial communities and putative ammonia-oxidizing and Fe(III)-reducing communities varied greatly along the soil profile, likely reflecting differences in carbon availability, water content, and pH.

TL;DR: The soil-root interface appears to be a complex biochemical environment, containing both reduced and oxidized mineral species, as well as bacterial-induced organic-metal complexes, which will influence the availability and mobility of metals within the rhizosphere of aquatic plants.

TL;DR: In this paper, the authors show that bacterially generated superoxide can oxidize manganese ions, generating manganized oxides, which can control numerous environmental processes, including the fate of contaminants.