Denitrification of groundwater with pyrite and Thiobacillus denitrificans

Torrentó, Clara; Cama, Jordi; Urmeneta, Jordi; Otero, Neus; Soler, Albert

doi:10.1016/j.chemgeo.2010.09.003

Cited by 176 publications

(139 citation statements)

References 54 publications

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“…About 1% (dry weight) of the sediment of the SO 4 2Ϫ -rich Salton Sea (United States) was found to consist of reduced Fe phases, which were dominated by greigite (Fe 3 S 4 ; sulfur analogue to magnetite) and pyrite (FeS 2 ) (12). Fe(II) released during oxidation of pyrite has been shown to also serve as an electron donor for microorganisms (89). The presence of bioavailable Fe(II) and Fe(III) mineral phases in various salt lake sediments could be indicative of both microaerophilic and anaerobic microbial Fe(II) oxidation and Fe(III) reduction in these environments.…”

Section: Discussionmentioning

confidence: 99%

Abundance, Distribution, and Activity of Fe(II)-Oxidizing and Fe(III)-Reducing Microorganisms in Hypersaline Sediments of Lake Kasin, Southern Russia

Emmerich

Bhansali

Lösekann-Behrens

et al. 2012

Appl Environ Microbiol

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ABSTRACTThe extreme osmotic conditions prevailing in hypersaline environments result in decreasing metabolic diversity with increasing salinity. Various microbial metabolisms have been shown to occur even at high salinity, including photosynthesis as well as sulfate and nitrate reduction. However, information about anaerobic microbial iron metabolism in hypersaline environments is scarce. We studied the phylogenetic diversity, distribution, and metabolic activity of iron(II)-oxidizing and iron(III)-reducingBacteriaandArchaeain pH-neutral, iron-rich salt lake sediments (Lake Kasin, southern Russia; salinity, 348.6 g liter−1) using a combination of culture-dependent and -independent techniques. 16S rRNA gene clone libraries forBacteriaandArchaearevealed a microbial community composition typical for hypersaline sediments. Most-probable-number counts confirmed the presence of 4.26 × 102to 8.32 × 103iron(II)-oxidizingBacteriaand 4.16 × 102to 2.13 × 103iron(III)-reducing microorganisms per gram dry sediment. Microbial iron(III) reduction was detected in the presence of 5 M NaCl, extending the natural habitat boundaries for this important microbial process. Quantitative real-time PCR showed that 16S rRNA gene copy numbers of totalBacteria, totalArchaea, and species dominating the iron(III)-reducing enrichment cultures (relatives ofHalobaculum gomorrense,Desulfosporosinus lacus, and members of theBacilli) were highest in an iron oxide-rich sediment layer. Combined with the presented geochemical and mineralogical data, our findings suggest the presence of an active microbial iron cycle at salt concentrations close to the solubility limit of NaCl.

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Section: Discussionmentioning

confidence: 99%

Abundance, Distribution, and Activity of Fe(II)-Oxidizing and Fe(III)-Reducing Microorganisms in Hypersaline Sediments of Lake Kasin, Southern Russia

Emmerich

Bhansali

Lösekann-Behrens

et al. 2012

Appl Environ Microbiol

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“…Most species of Thiobacillus use ammonium salt as nitrogen source (Allegretti et al 2006;Nikolov et al 2002;Yousefi et al 2014), and some of them are capable of denitrification that can reduce the content of nitrogen in the soil nutrition (Torrentó et al 2010). Based on the reported functional role of Thiobacillus in soil, the lower total nitrogen recorded at XQ5 may be potentially due to metabolic activity of this genus.…”

Section: Identification Of the Core Generamentioning

confidence: 99%

Bacterial community compositions in sediment polluted by perfluoroalkyl acids (PFAAs) using Illumina high-throughput sequencing

Yu-rong

Wang

Peng

et al. 2016

Environ Sci Pollut Res

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The characterization of bacterial community compositions and the change in perfluoroalkyl acids (PFAAs) along a natural river distribution system were explored in the present study. Illumina high-throughput sequencing was used to explore bacterial community diversity and structure in sediment polluted by PFAAs from the Xiaoqing River, the area with concentrated fluorochemical facilities in China. The concentration of PFAAs was in the range of 8.44-465.60 ng/g dry weight (dw) in sediment. Perfluorooctanoic acid (PFOA) was the dominant PFAA in all samples, which accounted for 94.2 % of total PFAAs. High-level PFOA could lead to an obvious increase in relative abundance of Proteobacteria, ε-Proteobacteria, Thiobacillus, and Sulfurimonas and the decrease in relative abundance of other bacteria. Redundancy analysis revealed that PFOA played an important role in the formation of bacterial community, and PFOA at higher concentration could reduce the diversity of bacterial community. When the concentration of PFOA was below 100 ng/g dw in sediment, no significant effect on microbial community structure was observed. Thiobacillus and Sulfurimonas were positively correlated with the concentration of PFOA, suggesting that both genera were resistant to PFOA contamination.

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“…The possibility of quantifying both the origin and the secondary processes affecting N concentrations by means of a single tracer appears more limited however. Nitrogen cannot be considered conservative because it is biologically modified through nitrification and denitrification reactions, both during infiltration of the water and in the groundwater body, causing isotopic fractionation that modifies the б 15 N signatures of the dissolved N species (VOGEL et al, 1981;MARIOTTI et al, 1988;Böttcher et al, 1990;Smith et al, 1991;FEATS et al, 1998;ARAVENA AND ROBERTSON, 1998;PAUWELS et al, 2000, TORRENTÓ et al, 2010ZHANG et al, 2010). In some cases, the interference between the isotopic fractionation (linked to denitrification) and the mixing processes (from the combination of multiple nitrate sources) might hamper the identification of nitrate sources, since the associated fractionation processes can alter the isotope composition of dissolved nitrate.…”

Section: Stable Isotopes Of Nitrate: Nitrogen-15 Oxygen-18 and Oxygementioning

confidence: 99%

Multi-isotope approach for the identification and characterisation of nitrate pollution sources in the Marano lagoon (Italy) and parts of its catchment area

Saccon

Leis

Marca

et al. 2013

Applied Geochemistry

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Denitrification of groundwater with pyrite and Thiobacillus denitrificans

Cited by 176 publications

References 54 publications

Abundance, Distribution, and Activity of Fe(II)-Oxidizing and Fe(III)-Reducing Microorganisms in Hypersaline Sediments of Lake Kasin, Southern Russia

Abundance, Distribution, and Activity of Fe(II)-Oxidizing and Fe(III)-Reducing Microorganisms in Hypersaline Sediments of Lake Kasin, Southern Russia

Bacterial community compositions in sediment polluted by perfluoroalkyl acids (PFAAs) using Illumina high-throughput sequencing

Multi-isotope approach for the identification and characterisation of nitrate pollution sources in the Marano lagoon (Italy) and parts of its catchment area

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