Formation of Methane and Carbon Dioxide from Dimethylselenide in Anoxic Sediments and by a Methanogenic Bacterium

Oremland, Ronald S.; Zehr, Jon P.

doi:10.1128/aem.52.5.1031-1036.1986

Cited by 50 publications

(33 citation statements)

References 22 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, a high yield of Se 0 production by further reducing SeO 3 2− has been observed for Bacillus beveridgei [22], D. indicum [75], Desulfovibrio desulfuricans [95], E. cloacae SLD1a-1 [96] and Sulfospirillum barnesii SES-3 [25,96]. Nevertheless, fewer bacterial species (i.e., Bacillus selenitireducens and Aquificales sp.)…”

Section: −mentioning

confidence: 99%

Microbial-Based Bioremediation of Selenium and Tellurium Compounds

Piacenza¹,

Presentato²,

Zonaro³

et al. 2018

Biosorption

View full text Add to dashboard Cite

The chalcogens selenium (Se) and tellurium (Te) are rare earth elements, which are mainly present in the environment as toxic oxyanions, due to the anthropogenic activities. Thus, the increased presence of these chalcogen-species in the environment and the contamination of wastewaters nearby processing facilities led to the necessity in developing remediation strategies aimed to detoxify waters, soils and sediments. Among the different decontamination approaches, those based on the ability of microorganisms to bioaccumulate, biomethylate or bioconvert Se-and/or Te-oxyanions are considered the leading strategy for achieving a safe and eco-friendly bioremediation of polluted sites. Recently, several technologies based on the use of bacterial pure cultures, bacterial biofilms or microbial consortia grown in reactors with different configurations have been explored for Se-and Te-decontamination purposes. Further, the majority of microorganisms able to process chalcogen-oxyanions have been described to generate valuable Se-and/or Te-nanomaterials as end-products of their bioconversion, whose potential applications in biomedicine, optoelectronics and environmental engineering are still under investigation. Here, the occurrence, the use and the toxicity of Se-and Te-compounds will be briefly overviewed, while the microbial mechanisms of chalcogen-oxyanions bioprocessing, as well as the microbialbased strategies used for bioremediation approaches will be extensively described. Biosorption 132Biosorption 136Microbial-Based Bioremediation of Selenium and Tellurium Compounds

show abstract

Section: −mentioning

confidence: 99%

Microbial-Based Bioremediation of Selenium and Tellurium Compounds

Piacenza¹,

Presentato²,

Zonaro³

et al. 2018

Biosorption

View full text Add to dashboard Cite

show abstract

“…The subject of microbial methylation of arsenic and related metalloids was recently reviewed by Bentley and Chasteen [92]. Methylotrophic methanogens can demethylate metalloids like dimethylselenide, which is an analog of dimethylsulfide, one of their recognized growth substrates [93]. However, in the case of arsenic, McBride and Wolfe [94] demonstrated the opposite, namely that whole cells and extracts of hydrogen-oxidizing Methanobacterium bryantii could form dimethylarsine from externally supplied arsenate ions.…”

Section: Organic Arsenicalsmentioning

confidence: 99%

The microbial arsenic cycle in Mono Lake, California

Oremland¹,

Stolz²,

Hollibaugh³

2004

FEMS Microbiology Ecology

160

View full text Add to dashboard Cite

Significant concentrations of dissolved inorganic arsenic can be found in the waters of a number of lakes located in the western USA and in other water bodies around the world. These lakes are often situated in arid, volcanic terrain. The highest concentrations of arsenic occur in hypersaline, closed basin soda lakes and their remnant brines. Although arsenic is a well-known toxicant to eukaryotes and prokaryotes alike, some prokaryotes have evolved biochemical mechanisms to exploit arsenic oxyanions (i.e., arsenate and arsenite); they can use them either as an electron acceptor for anaerobic respiration (arsenate), or as an electron donor (arsenite) to support chemoautotrophic fixation of CO(2) into cell carbon. Unlike in freshwater or marine ecosystems, these processes may assume quantitative significance with respect to the carbon cycle in arsenic-rich soda lakes. For the past several years our research has focused on the occurrence and biogeochemical manifestations of these processes in Mono Lake, a particularly arsenic-rich environment. Herein we review some of our findings concerning the biogeochemical arsenic cycle in this lake, with the hope that it may broaden the understanding of the influence of microorganisms upon the speciation of arsenic in more common, less "extreme" environments, such as drinking water aquifers.

show abstract

“…This may be the most important loss mechanism for methylarsenicals from aerated soils and CO 2 and arsenate may be final products [50]. Methanogenic and sulphate-respiring bacteria can demethylate dimethylselenide to CH 4 and CO 2 [78].…”

Section: Degradation and Detoxification Of Organometal (Ioid)smentioning

confidence: 99%

Microbial formation and transformation of organometallic and organometalloid compounds

Gadd

1993

FEMS Microbiology Reviews

182

View full text Add to dashboard Cite

Microbial formation and transformation of organometallic and organometalloid compounds comprise significant components of biogeochemical cycles for the metals mercury, lead and tin and the metalloids arsenic, selenium, tellurium and germanium. Methylated derivatives of such elements can arise as a result of chemical and biological mechanisms and this frequently results in altered volatility, solubility, toxicity and mobility. The major microbial methylating agents are methylcobalamin (CH3CoB12), involved in the methylation of mercury, tin and lead, and S‐adenosylmethionine (SAM), involved in the methylation of arsenic and selenium. Evidence for the methylation of other toxic metal(loid)s is sparse. Biomethylation may result in metal(loid) detoxification since methylated derivatives may be excreted readily from cells, are often volatile and may be less toxic, e.g. organoarsenicals. However, for mercury, low yields of methylated derivatives and the existence of more efficient resistance mechanisms, e.g. reduction of Hg2+ to Hg0, suggest a lower significance in detoxification. Bioalkylation has only been characterised in detail for arsenic. Microorganisms can accumulate organometal(loid)s, a phenomenon relevant to toxicant transfer to higher organisms. As well as bioaccumulation, many microorganisms are capable of the degradation and detoxification of organometal(loid) compounds by, e.g. demethylation and dealkylation. Several organometal(loid) transformations have potential for environmental bioremediation.

show abstract

Formation of Methane and Carbon Dioxide from Dimethylselenide in Anoxic Sediments and by a Methanogenic Bacterium

Cited by 50 publications

References 22 publications

Microbial-Based Bioremediation of Selenium and Tellurium Compounds

Microbial-Based Bioremediation of Selenium and Tellurium Compounds

The microbial arsenic cycle in Mono Lake, California

Microbial formation and transformation of organometallic and organometalloid compounds

Contact Info

Product

Resources

About