INTERACTION BETWEEN IRON AND PSEUDOMONAS AERUGINOSA BIOFILMS ATTACHED TO SEPHAROSE SURFACES
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dc.contributor.author | Lee J.U. | |
dc.contributor.author | Beveridge T.J. | |
dc.date.accessioned | 2021-02-08T00:55:30Z | |
dc.date.available | 2021-02-08T00:55:30Z | |
dc.date.issued | 2001 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=788658 | |
dc.identifier.citation | Chemical Geology, 2001, 180, 1-4, 67-80 | |
dc.identifier.issn | 0009-2541 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/24518 | |
dc.description.abstract | When Pseudomonas aeruginosa PAO1 biofilms (attached to Sepharose surfaces) were subjected to dissolved Fe3+, most Fe was removed from solution within 25 h by surface complexation with negatively charged functional groups on the bacterial cell wall via a nucleation and mineralization process. Chemical formation of Fe-(hydr)oxides was partially responsible for dissolved Fe removal, which stemmed from a pH increase, facilitated by microbial activity. PAO1 used Fe3+ as an electron acceptor producing Fe2+ under localized anaerobic conditions over the first 50 h. The high ratio of Fe2+ to total Fe in solution produced a high proportion of Fe(II) in Fe precipitates; however, as the formation of Fe-(hydr)oxides started after 50 h, the Fe2+ content in solution began to diminish. Biofilms can so influence the local chemical conditions and metal speciation that the bulk solution phase is also affected, thereby mediating a wide-range (bio)geochemical cycling of iron. Long-term survival of natural biofilms, even under strict oligotrophic conditions, could have a broad lasting effect on the bulk geochemical environment. | |
dc.subject | IRON | |
dc.subject | PSEUDOMONAS AERUGINOSA | |
dc.subject | SEPHAROSE | |
dc.title | INTERACTION BETWEEN IRON AND PSEUDOMONAS AERUGINOSA BIOFILMS ATTACHED TO SEPHAROSE SURFACES | |
dc.type | Статья |
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