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

DE2005837302

Publication Date	2005
Page Count	12
Abstract	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.
Keywords	Bacteria Aerobic bacteria Hydroxide Iron oxides Microorganisms Pseudomonas Adsorption Minerals Ph factor Dissolution Clay minerals Siderophores
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200521

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

Dissolution of Fe(III)(hydr) by an Aerobic Bacterium.
DE2005837302

Publication Date	2005
Page Count	12
Abstract	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.
Keywords	Bacteria Aerobic bacteria Hydroxide Iron oxides Microorganisms Pseudomonas Adsorption Minerals Ph factor Dissolution Clay minerals Siderophores
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200521