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Microbial Resources, Fermentation and Reduction of Negative Externalities in Food Systems: Patterns toward Sustainability and Resilience. FERMENTATION-BASEL 2021. [DOI: 10.3390/fermentation7020054] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
One of the main targets of sustainable development is the reduction of environmental, social, and economic negative externalities associated with the production of foods and beverages. Those externalities occur at different stages of food chains, from the farm to the fork, with deleterious impacts to different extents. Increasing evidence testifies to the potential of microbial-based solutions and fermentative processes as mitigating strategies to reduce negative externalities in food systems. In several cases, innovative solutions might find in situ applications from the farm to the fork, including advances in food matrices by means of tailored fermentative processes. This viewpoint recalls the attention on microbial biotechnologies as a field of bioeconomy and of ‘green’ innovations to improve sustainability and resilience of agri-food systems alleviating environmental, economic, and social undesired externalities. We argue that food scientists could systematically consider the potential of microbes as ‘mitigating agents’ in all research and development activities dealing with fermentation and microbial-based biotechnologies in the agri-food sector. This aims to conciliate process and product innovations with a development respectful of future generations’ needs and with the aptitude of the systems to overcome global challenges.
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Han X, Tomaszewski EJ, Sorwat J, Pan Y, Kappler A, Byrne JM. Effect of Microbial Biomass and Humic Acids on Abiotic and Biotic Magnetite Formation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:4121-4130. [PMID: 32129607 DOI: 10.1021/acs.est.9b07095] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Magnetite (Fe3O4) is an environmentally ubiquitous mixed-valent iron (Fe) mineral, which can form via biotic or abiotic transformation of Fe(III) (oxyhydr)oxides such as ferrihydrite (Fh). It is currently unclear whether environmentally relevant biogenic Fh from Fe(II)-oxidizing bacteria, containing cell-derived organic matter, can transform to magnetite. We compared abiotic and biotic transformation: (1) abiogenic Fh (aFh); (2) abiogenic Fh coprecipitated with humic acids (aFh-HA); (3) biogenic Fh produced by phototrophic Fe(II)-oxidizer Rhodobacter ferrooxidans SW2 (bFh); and (4) biogenic Fh treated with bleach to remove biogenic organic matter (bFh-bleach). Abiotic or biotic transformation of Fh was promoted by Feaq2+ or Fe(III)-reducing bacteria. Feaq2+-catalyzed abiotic reaction with aFh and bFh-bleach led to complete transformation to magnetite. In contrast, aFh-HA only partially (68%) transformed to magnetite, and bFh (17%) transformed to goethite. We hypothesize that microbial biomass stabilized bFh against reaction with Feaq2+. All four Fh substrates were transformed into magnetite during biotic reduction, suggesting that Fh remains bioavailable even when associated with microbial biomass. Additionally, there were poorly ordered magnetic components detected in the biogenic end products for aFh and aFh-HA. Nevertheless, abiotic transformation was much faster than biotic transformation, implying that initial Feaq2+ concentration, passivation of Fh, and/or sequestration of Fe(II) by bacterial cells and associated biomass play major roles in the rate of magnetite formation from Fh. These results improve our understanding of factors influencing secondary mineralization of Fh in the environment.
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Affiliation(s)
- Xiaohua Han
- Biogeomagnetism Group, Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen 72074, Germany
- France-China International Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms, Chinese Academy of Sciences, Beijing 100029, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Elizabeth J Tomaszewski
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen 72074, Germany
| | - Julian Sorwat
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen 72074, Germany
| | - Yongxin Pan
- Biogeomagnetism Group, Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
- France-China International Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms, Chinese Academy of Sciences, Beijing 100029, China
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Andreas Kappler
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen 72074, Germany
| | - James M Byrne
- Geomicrobiology, Center for Applied Geosciences, University of Tuebingen, Tuebingen 72074, Germany
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Park S, Lee JH, Shin TJ, Hur HG, Kim MG. Adsorption and Incorporation of Arsenic to Biogenic Lepidocrocite Formed in the Presence of Ferrous Iron during Denitrification by Paracoccus denitrificans. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:9983-9991. [PMID: 30111094 DOI: 10.1021/acs.est.8b02101] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We demonstrate adsorption and partial incorporation of arsenic, in its soluble form, either as arsenite or arsenate into lepidocrocite (γ-FeOOH), which was formed through nitrite-driven Fe(II) oxidation by Paracoccus denitrificans under nitrate-reducing conditions. Fe and As K-edge XANES and radial distribution functions of Fourier-transformed EXAFS spectra showed that portions of As were found to be incorporated in the biogenic lepidocrocite, in addition to higher portions of adsorbed As. We suggest that denitrifying bacteria such as Paracoccus denitrificans, studied here, could facilitate decrease of aqueous arsenic As(III) and/or As(V) through indirect Fe(II) oxidation to solid phase iron minerals, here as lepidocrocite, by the denitrification product nitrite in the presence of nitrate, ferrous iron, and arsenic, under certain environmental conditions where these materials could be found, such as in As-contaminated paddy soils and wetlands.
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Affiliation(s)
- Sunhwa Park
- School of Earth Sciences and Environmental Engineering , Gwangju Institute of Science and Technology (GIST) , 123 Cheomdan-gwagiro , Buk-gu, Gwangju 61005 , Republic of Korea
| | - Ji-Hoon Lee
- Department of Bioenvironmental Chemistry , Chonbuk National University , Jeonju 54896 , Republic of Korea
| | - Tae Joo Shin
- UNIST Central Research Facilities & School of Natural Science , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - Hor-Gil Hur
- School of Earth Sciences and Environmental Engineering , Gwangju Institute of Science and Technology (GIST) , 123 Cheomdan-gwagiro , Buk-gu, Gwangju 61005 , Republic of Korea
| | - Min Gyu Kim
- Pohang Accelerator Laboratory (PAL) , Pohang University of Science and Technology , Pohang 37673 , Republic of Korea
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Byrne JM, Kappler A. Current and future microbiological strategies to remove As and Cd from drinking water. Microb Biotechnol 2017; 10:1098-1101. [PMID: 28695710 PMCID: PMC5609257 DOI: 10.1111/1751-7915.12742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 05/16/2017] [Indexed: 11/29/2022] Open
Affiliation(s)
- James M Byrne
- Center for Applied Geoscience, Geomicrobiology, Sigwartstr. 10, Tuebingen, 72076, Germany
| | - Andreas Kappler
- Center for Applied Geoscience, Geomicrobiology, Sigwartstr. 10, Tuebingen, 72076, Germany
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