Metal(loid)organic compounds in geothermal gases and waters

Hirner, Alfred V.; Feldmann, Jörg; Krupp, Eva M.; Grümping, R.; Goguel, Reiner; Cullen, William R.

doi:10.1016/s0146-6380(98)00153-3

Cited by 92 publications

(67 citation statements)

References 44 publications

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“…The presence of stibine (STB; SbH 3 ), monomethylstibine (MMSb), and dimethylstibine (DMSb) was first reported in natural waters by Andreae et al (71). Subsequently, the presence of Sb volatile and methylated species was further observed in freshwater, seawater, geothermal waters, sewage, soils, sediments, and landfill gas (71)(72)(73)(74). In addition, methylantimony species have been found in plants, such as pondweed (Potamogeton pectinatus), moss (Drepanocladus sp.…”

Section: Microbial Antimony Cyclementioning

confidence: 99%

Microbial Antimony Biogeochemistry: Enzymes, Regulation, and Related Metabolic Pathways

Wang

Oremland

et al. 2016

Appl Environ Microbiol

164

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e Antimony (Sb) is a toxic metalloid that occurs widely at trace concentrations in soil, aquatic systems, and the atmosphere. Nowadays, with the development of its new industrial applications and the corresponding expansion of antimony mining activities, the phenomenon of antimony pollution has become an increasingly serious concern. In recent years, research interest in Sb has been growing and reflects a fundamental scientific concern regarding Sb in the environment. In this review, we summarize the recent research on bacterial antimony transformations, especially those regarding antimony uptake, efflux, antimonite oxidation, and antimonate reduction. We conclude that our current understanding of antimony biochemistry and biogeochemistry is roughly equivalent to where that of arsenic was some 20 years ago. This portends the possibility of future discoveries with regard to the ability of microorganisms to conserve energy for their growth from antimony redox reactions and the isolation of new species of "antimonotrophs."

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Section: Microbial Antimony Cyclementioning

confidence: 99%

Microbial Antimony Biogeochemistry: Enzymes, Regulation, and Related Metabolic Pathways

Wang

Oremland

et al. 2016

Appl Environ Microbiol

164

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“…91-105 mg/L (Hug et al 2014). It was previously reported that the combination between dissolved toxic metal(loid)s and high temperature in hot springs represents a strong selective pressure on the inhabiting microbial communities (Hirner et al 1998). Indeed, sulfide ions commonly used as electron donors/acceptors by microorganisms under geothermal conditions, are highly reactive with arsenic ).…”

Section: Taupo Volcanic Zone New Zealandmentioning

confidence: 99%

Metagenomics of microbial and viral life in terrestrial geothermal environments

Strazzulli

Fusco

Cobucci‐Ponzano

et al. 2017

Rev Environ Sci Biotechnol

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Geothermally heated regions of Earth, such as terrestrial volcanic areas (fumaroles, hot springs, and geysers) and deep-sea hydrothermal vents, represent a variety of different environments populated by extremophilic archaeal and bacterial microorganisms. Since most of these microbes thriving in such harsh biotopes, they are often recalcitrant to cultivation; therefore, ecological, physiological and phylogenetic studies of these microbial populations have been hampered for a long time. More recently, culture-independent methodologies coupled with the fast development of next generation sequencing technologies as well as with the continuous advances in computational biology, have allowed the production of large amounts of metagenomic data. Specifically, these approaches have assessed the phylogenetic composition and functional potential of microbial consortia thriving within these habitats, shedding light on how extreme physico-chemical conditions and biological interactions have shaped such microbial communities. Metagenomics allowed to better understand that the exposure to an extreme range of selective pressures in such severe environments, accounts for genomic flexibility and metabolic versatility of microbial and viral communities, and makes extreme-and hyper-thermophiles suitable for bioprospecting purposes, representing an interesting source for novel thermostable proteins that can be potentially used in several industrial processes.Keywords Hyperthermophiles Á Geothermal environments Á Microbial and viral metagenomics Á CRISPR Á Enzyme discovery BackgroundHot springs populated by extreme thermophiles (T opt : 65-79°C) and hyperthermophiles (T opt [ 80°C) (DeCastro et al. 2016) are very diverse and some of them show combinations of extreme chemo-physical conditions, such as temperature, acidic or alkaline pHs, high pressure, and high concentrations of salts and heavy metals (López-López et al. 2013). As with all studies of environmental microbiology, our understanding of the composition, functional and physiological dynamics, and evolution of extreme-and hyper-thermophilic microbial consortia has lagged A. Strazzulli Á M. Moracci Á P. Contursi

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“…Concentrations of trimethylstibine in thermophilic sewage digestion gases in the range of 6.7 to 14.7 g m Ϫ3 were proposed to originate from biological sources after this metalloid was supplied from anthropogenic sources (86). Volatile antimony species were detected in gases over hot springs in British Columbia, Canada (120). Analytical methods for antimony determination at trace levels in environmental samples have been reviewed (183,221).…”

Section: Microbial Methylation Of Antimonymentioning

confidence: 99%

Microbial Methylation of Metalloids: Arsenic, Antimony, and Bismuth

Bentley

Chasteen

2002

Microbiol Mol Biol Rev

515

316

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A significant 19th century public health problem was that the inhabitants of many houses containing wallpaper decorated with green arsenical pigments experienced illness and death. The problem was caused by certain fungi that grew in the presence of inorganic arsenic to form a toxic, garlic-odored gas. The garlic odor was actually put to use in a very delicate microbiological test for arsenic. In 1933, the gas was shown to be trimethylarsine. It was not until 1971 that arsenic methylation by bacteria was demonstrated. Further research in biomethylation has been facilitated by the development of delicate techniques for the determination of arsenic species. As described in this review, many microorganisms (bacteria, fungi, and yeasts) and animals are now known to biomethylate arsenic, forming both volatile (e.g., methylarsines) and nonvolatile (e.g., methylarsonic acid and dimethylarsinic acid) compounds. The enzymatic mechanisms for this biomethylation are discussed. The microbial conversion of sodium arsenate to trimethylarsine proceeds by alternate reduction and methylation steps, with S-adenosylmethionine as the usual methyl donor. Thiols have important roles in the reductions. In anaerobic bacteria, methylcobalamin may be the donor. The other metalloid elements of the periodic table group 15, antimony and bismuth, also undergo biomethylation to some extent. Trimethylstibine formation by microorganisms is now well established, but this process apparently does not occur in animals. Formation of trimethylbismuth by microorganisms has been reported in a few cases. Microbial methylation plays important roles in the biogeochemical cycling of these metalloid elements and possibly in their detoxification. The wheel has come full circle, and public health considerations are again important

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Metal(loid)organic compounds in geothermal gases and waters

Cited by 92 publications

References 44 publications

Microbial Antimony Biogeochemistry: Enzymes, Regulation, and Related Metabolic Pathways

Microbial Antimony Biogeochemistry: Enzymes, Regulation, and Related Metabolic Pathways

Metagenomics of microbial and viral life in terrestrial geothermal environments

Microbial Methylation of Metalloids: Arsenic, Antimony, and Bismuth

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