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

Maurice, P.

University of Notre Dame (United States)

关键词: Aerobic Digestion;    Radionuclide Migration;    Clays;    Dissolution;    Adsorption;   

DOI  :  10.2172/837302
RP-ID  :  DOE/ER/15106-1
RP-ID  :  FG02-00ER15106
RP-ID  :  837302

美国|英语

来源: UNT Digital Library

【 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.