Dissolution of Fe(III)(hydr)oxides by an Aerobic Bacterium

[摘要] This project investigated the effects of an aerobic Pseudomonas mendocina bacterium on the dissolution of Fe(III)(hydr)oxides. The research is important because metals and radionuclides that adsorb to Fe(III)(hydr)oxides could potentially be remobilized by dissolving bacteria. We showed that P. mendocina is capable of dissolving Fe-bearing minerals by a variety of mechanisms, including production of siderophores, pH changes, and formation of reductants. The production of siderophores by P. mendocina was quantified under a variety of growth conditions. Finally, we demonstrated that microbial siderophores may adsorb to and enhance dissolution of clay minerals.

[发布日期] 2004-12-13 [发布机构] University of Notre Dame (United States)

[关键词] Aerobic Digestion;Radionuclide Migration;Clays;Dissolution;Adsorption