Bacterial Metal Accumulation as a Strategy for Waste Recycling Management
Sustainable mechanisms for efficient and circular metal recycling have yet to be uncovered. In this study, the metal recycling potential of seven metal-resistant bacterial species (<i>Deinococcus radiodurans</i>, <i>Deinococcus aerius</i>, <i>Bacillus coagulans</i>...
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MDPI AG
2023-12-01
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| Online Access: | https://www.mdpi.com/2079-9276/12/12/144 |
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| author | Denise Kölbi Alma Memic Holger Schnideritsch Dominik Wohlmuth Gerald Klösch Mihaela Albu Tetyana Milojevic |
| author_facet | Denise Kölbi Alma Memic Holger Schnideritsch Dominik Wohlmuth Gerald Klösch Mihaela Albu Tetyana Milojevic |
| author_sort | Denise Kölbi |
| collection | DOAJ |
| description | Sustainable mechanisms for efficient and circular metal recycling have yet to be uncovered. In this study, the metal recycling potential of seven metal-resistant bacterial species (<i>Deinococcus radiodurans</i>, <i>Deinococcus aerius</i>, <i>Bacillus coagulans</i>, <i>Pseudomonas putida</i>, <i>Staphylococcus rimosus</i>, <i>Streptomyces xylosus</i> and <i>Acidocella aluminiidurans</i>) was investigated in a multi-step strategy, which comprises bioleaching of industrial waste products and subsequent biosorption/bioaccumulation studies. Each species was subjected to an acidic, multi-metal bioleachate solution and screened for potential experimental implementation. Bacterial growth and metal acquisition were examined using scanning transmission electron microscopy coupled to electron dispersive X-ray spectroscopy (STEM-EDS). Two of the seven screened species, <i>D. aerius</i> and <i>A. aluminiidurans</i>, propagated in a highly acidic and metal-laden environment. Both accumulated iron and copper compounds during cultivation on a multi-metallic bioleachate. Our findings suggest that extremotolerant bacteria should be considered for waste recycling operations due to their inherent polyextremophily. Furthermore, STEM-EDS is a promising tool to investigate microbial–metal interactions in the frames of native industrial waste products. To develop further experimental steps, detailed analyses of adsorption/accumulation mechanisms in <i>D. aerius</i> and <i>A. aluminiidurans</i> are required to design a circular metal recycling procedure. |
| first_indexed | 2024-03-08T20:23:47Z |
| format | Article |
| id | doaj.art-28c27993444e4c2aa7542afd0fa6ee54 |
| institution | Directory Open Access Journal |
| issn | 2079-9276 |
| language | English |
| last_indexed | 2024-03-08T20:23:47Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Resources |
| spelling | doaj.art-28c27993444e4c2aa7542afd0fa6ee542023-12-22T14:39:28ZengMDPI AGResources2079-92762023-12-01121214410.3390/resources12120144Bacterial Metal Accumulation as a Strategy for Waste Recycling ManagementDenise Kölbi0Alma Memic1Holger Schnideritsch2Dominik Wohlmuth3Gerald Klösch4Mihaela Albu5Tetyana Milojevic6Exobiology Group, CNRS-Centre de Biophysique Moléculaire, University of Orléans, Rue Charles Sadron, CEDEX 2, 45071 Orléans, FranceExobiology Group, CNRS-Centre de Biophysique Moléculaire, University of Orléans, Rue Charles Sadron, CEDEX 2, 45071 Orléans, FranceVoestalpine Stahl Donawitz GmbH, 8700 Leoben, AustriaVoestalpine Stahl Donawitz GmbH, 8700 Leoben, AustriaVoestalpine Stahl Donawitz GmbH, 8700 Leoben, AustriaGraz Centre for Electron Microscopy, 8010 Graz, AustriaExobiology Group, CNRS-Centre de Biophysique Moléculaire, University of Orléans, Rue Charles Sadron, CEDEX 2, 45071 Orléans, FranceSustainable mechanisms for efficient and circular metal recycling have yet to be uncovered. In this study, the metal recycling potential of seven metal-resistant bacterial species (<i>Deinococcus radiodurans</i>, <i>Deinococcus aerius</i>, <i>Bacillus coagulans</i>, <i>Pseudomonas putida</i>, <i>Staphylococcus rimosus</i>, <i>Streptomyces xylosus</i> and <i>Acidocella aluminiidurans</i>) was investigated in a multi-step strategy, which comprises bioleaching of industrial waste products and subsequent biosorption/bioaccumulation studies. Each species was subjected to an acidic, multi-metal bioleachate solution and screened for potential experimental implementation. Bacterial growth and metal acquisition were examined using scanning transmission electron microscopy coupled to electron dispersive X-ray spectroscopy (STEM-EDS). Two of the seven screened species, <i>D. aerius</i> and <i>A. aluminiidurans</i>, propagated in a highly acidic and metal-laden environment. Both accumulated iron and copper compounds during cultivation on a multi-metallic bioleachate. Our findings suggest that extremotolerant bacteria should be considered for waste recycling operations due to their inherent polyextremophily. Furthermore, STEM-EDS is a promising tool to investigate microbial–metal interactions in the frames of native industrial waste products. To develop further experimental steps, detailed analyses of adsorption/accumulation mechanisms in <i>D. aerius</i> and <i>A. aluminiidurans</i> are required to design a circular metal recycling procedure.https://www.mdpi.com/2079-9276/12/12/144extremophilesbioleachingsteel wastemetal recycling |
| spellingShingle | Denise Kölbi Alma Memic Holger Schnideritsch Dominik Wohlmuth Gerald Klösch Mihaela Albu Tetyana Milojevic Bacterial Metal Accumulation as a Strategy for Waste Recycling Management Resources extremophiles bioleaching steel waste metal recycling |
| title | Bacterial Metal Accumulation as a Strategy for Waste Recycling Management |
| title_full | Bacterial Metal Accumulation as a Strategy for Waste Recycling Management |
| title_fullStr | Bacterial Metal Accumulation as a Strategy for Waste Recycling Management |
| title_full_unstemmed | Bacterial Metal Accumulation as a Strategy for Waste Recycling Management |
| title_short | Bacterial Metal Accumulation as a Strategy for Waste Recycling Management |
| title_sort | bacterial metal accumulation as a strategy for waste recycling management |
| topic | extremophiles bioleaching steel waste metal recycling |
| url | https://www.mdpi.com/2079-9276/12/12/144 |
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