Biogenic Mn oxide minerals coating in a subsurface granite environment

Miller, Ana Z.; Dionísio, Amélia; Braga, M. A. Sequeira; Hernández-Mariné, Mariona; Afonso, María José; Muralha, Vânia S. F.; Herrera, Liz Karen; Raabe, Jörg; Fernández-Cortés, Ángel; Cuezva, Soledad; Hermosín, Bernardo; Sánchez‐Moral, Sergio; Chaminé, Helder I.; Sáiz-Jiménez, C.

doi:10.1016/j.chemgeo.2012.07.005

Cited by 57 publications

(57 citation statements)

References 56 publications

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“…Mineralized Mnoxidizing bacteria have been suggested to be formed in the final step of microbial Mn(II) oxidation at the onset of the stationary phase or after sporulation (Tebo et al, 2004), providing a direct evidence for the presence of Mn-oxidzing bacteria. In the spheroids, Mn-oxides commonly exhibit fibrillar morphologies, resembling biogenic Mn oxides formed by Mn(II)-oxidizing bacteria reported previously (Miller et al, 2012). NanoSIMS ion mapping reveals that fibrillar Mn oxides display a more intense 12 C 14 N signal, further indicating their biological origin ( Fig.A8).…”

Section: Mineralized Mn(ii)-oxidizing Bacteriamentioning

confidence: 70%

Coexistence of Fe(II)- and Mn(II)-oxidizing bacteria govern the formation of deep sea umber deposits

Peng

Chen

et al. 2015

Geochimica et Cosmochimica Acta

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Section: Mineralized Mn(ii)-oxidizing Bacteriamentioning

confidence: 70%

Coexistence of Fe(II)- and Mn(II)-oxidizing bacteria govern the formation of deep sea umber deposits

Peng

Chen

et al. 2015

Geochimica et Cosmochimica Acta

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“…These U "traps" also explain the high levels of 222 Rn, 6000 to 7000 Bq/m 3 , detected in the air of Paranhos and Salgueiros galleries [37]. According to [33], the granite radioactivity is also due to the enrichment of monazite in mica's inclusions; (ii) U concentrations of 12.9 ppm and 19.7 ppm were found in iron and manganese biomineralisations, which occur as black coatings in the granite [39,79,80] that are capable of adsorbing heavy metals and radionuclides [81]. Furthermore, [82] refer the presence of bacteria similar to Leptothrix that develops in habitats such as Paranhos and Salgueiros galleries, systems where meteoric or surface waters recharge the subterranean environment [81].…”

Section: Hydrogeochemistry and Isotope Tracersmentioning

confidence: 99%

Environmental Groundwater Vulnerability Assessment in Urban Water Mines (Porto, NW Portugal)

Afonso

Freitas

Pereira

et al. 2016

Water

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A multidisciplinary approach was developed to estimate urban groundwater vulnerability to contamination combining hydrogeology, hydrogeochemistry, subterranean hydrogeotechnics, groundwater ecotoxicology and isotope tracers. Paranhos and Salgueiros spring waters in Porto City were used as a case study. Historical and current vulnerability scenarios were compared using hydrogeological GIS-based modelling. Potential contamination sources were mapped around the spring galleries. Most of these were point sources and their potential contamination load was moderate. The ecotoxicological assessment indicated a low acute toxicity potential. Groundwater radionuclides appeared to be mainly controlled by geological factors and biomineralisation. Vulnerability maps suggest that most of the area has a moderate to low vulnerability to contamination. However, some surface sources such as sewage systems cause contamination and contribute to increased vulnerability. This integrated approach was demonstrated to be adequate for a better knowledge of urban hydrogeological processes and their dynamics, and highlighted the importance of a vulnerability assessment in urban areas.

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“…A and B). These formations are similar to biogenic Mn oxides found in different environments and formed under different conditions (Francis and Tebo, ; Spilde et al ., ; Jiang et al ., ; Miller et al ., ). The presence of these structures suggests that the formation of biogenic Mn oxides observed in cultures is occurring in situ in Lake Superior sediments, rather than merely forming as the result of favourable culturing conditions.…”

Section: Resultsmentioning

confidence: 97%

Evidence for the biogenic origin of manganese‐enriched layers in Lake Superior sediments

Palermo

Dittrich

2016

Environ Microbiol Rep

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Manganese (Mn) and iron (Fe)-enriched sediment layers were discovered in Lake Superior within, above and below the oxic-anoxic interface. While the role of bacteria in redox reactions with Mn is known to be significant, little information exists about indigenous microbial communities in many freshwater environments. This study examined the bacterial communities of Mn-enriched layers in Lake Superior to identify the potential Mn(II) oxidizers responsible for the formation of Mn oxides. Anaerobic Mn(II) oxidation occurring in the Mn-enriched layers at the oxic-anoxic interface was investigated using Mn(II)-enriched cultures. High-resolution microscopic and spectroscopic investigations provided evidence of the biogenic formation of Mn oxides on cell surfaces. Spectroscopic mapping confirmed high levels of Mn in structures resembling biogenic Mn oxides. These structures were observed in enrichment cultures and in Mn-enriched layer sediment samples, indicating the significance of biogenic Mn oxidation occurring in situ. 16S ribosomal DNA pyrosequencing was used to identify the bacteria potentially responsible for Mnoxide formation in the enrichment cultures and Mn-enriched layers, revealing that the Mn-enriched layer contains classes with known Mn(II)-oxidizing members. Pyrosequencing of bacterial cultures suggested that these bacteria may be Bacillus strains, and that anaerobic microbial-mediated Mn(II) oxidation contributes to the formation of the layers.

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Biogenic Mn oxide minerals coating in a subsurface granite environment

Cited by 57 publications

References 56 publications

Coexistence of Fe(II)- and Mn(II)-oxidizing bacteria govern the formation of deep sea umber deposits

Coexistence of Fe(II)- and Mn(II)-oxidizing bacteria govern the formation of deep sea umber deposits

Environmental Groundwater Vulnerability Assessment in Urban Water Mines (Porto, NW Portugal)

Evidence for the biogenic origin of manganese‐enriched layers in Lake Superior sediments

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