Ferric iron reduction acidophiles
WebNov 3, 2011 · Iron oxidation in acidophiles is best understood in the model organism Acidithiobacillus ferrooxidans. However, recent functional genomic analysis of acidophiles is leading to a deeper appreciation of the diversity of acidophilic iron-oxidizing pathways. ... (II) is rapidly oxidized to ferric iron [Fe(III)]. Thus, iron predominantly occurs in ... WebDec 1, 1998 · Ferric iron reduction has also been demonstrated with a number of mesophilic heterotrophic bacteria and the mixotroph Thiobacillus acidophilus [27], and with some Alicyclobacillus-like thermophilic acidophiles [28]. Anaerobic growth coupled to iron reduction was demonstrated in one strain (SJH) of Acidiphilium [27]. However, attempts …
Ferric iron reduction acidophiles
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Reductive dissolution by acidophiles was shown for several ferric iron-containing minerals, as ferric hydroxide [Fe(OH)3], goethite (α-FeOOH), akageneite (β-FeOOH), magnetite (Fe3O4), potassium jarosite [KFe2(SO4)2(OH)6], and natrojarosite [NaFe2(SO4)2(OH)6] (Bridge and Johnson, 1998, … See more Acidic environments such as acid mine drainage are the result of anthropogenic influences or have a natural origin, e.g., solfataric springs (Johnson, 2009). Depending on the occurring pH, these environments are … See more Iron reduction as part of the natural iron cycle plays an important role on Earth (Kappler and Straub, 2005). Despite the well-studied mechanisms of iron reduction by neutrophilic microorganisms, the process in acidophilic … See more LM: writing manuscript, preparing figures, and tables. SH: conceptual discussions, revising, and editing manuscript. Both authors contributed … See more Although iron reduction processes mediated by acidophiles have been known for nearly 50 years, it is only in the last decade that much interest has developed in their application. This especially included the … See more WebMar 16, 2012 · Bioprocessing of oxidized mineral ores using acidophiles that catalyze the reductive dissolution of ferric iron minerals such as goethite has also recently been …
WebWhile dissimilatory ferric iron reduction has been described previously for Acidiphilium spp., this is this first report of this capacity in Acidocella and the moderate acidophile … WebFerric iron reduction by Acidiphilium spp. may occur in oxygen-containing as well as anoxic acidic environments. This will detract from the effectiveness of bioremediation …
WebMar 1, 2008 · Dissimilatory ferric iron reduction under anaerobic conditions is widespread among acidophiles and can be coupled to the oxidation of hydrogen, sulfur, RISC or organic compounds (Coupland and ... WebDec 24, 2024 · There are three distinct types of ferrous iron-oxidizing microbes. The first are acidophiles, such as the bacteria Acidithiobacillus ferrooxidans and Leptospirillum …
WebJul 1, 2016 · The aim of this review is to provide an up-to-date overview on ferric iron reduction by acidophiles. The importance of this process in anaerobic habitats will be demonstrated as well as its ...
WebJan 1, 2024 · The most important milestones of ferric iron reduction research in acidophiles are summarized in Table 1. First investigations of acidithiobacilli described aerobic ferric iron reduction at low pH (Brock and Gustafson, 1976; Sand, 1989) and anaerobic ferrous iron formation (Brock and Gustafson, 1976). download java 8 linux 64 bitWebMar 16, 2012 · Specific rates of ferric iron reduction by heterotrophic (Acidiphilium) and autotrophic (Acidithiobacillus spp.) acidophiles. … radicals projectWebThis is reasonable since energy generation in many species from these classes is associated with ferrous iron oxidation or ferric iron reduction (Bridge and Johnson, 2000; Holmes et al., 2004). ... and are obligate acidophiles since the oxidation of sulfur and sulfide minerals generates sulfuric acid (Bini, 2010). download java 8 jdk ubuntu 18.04WebBoth are aerobic chemolithotrophs; L. ferriphilum is known only to use ferrous iron as electron donor, while A. caldus can use zero-valent and reduced sulfur, and also hydrogen, as electron donors. It has recently been demonstrated that A. caldus reduces ferric iron to ferrous when grown aerobically on sulfur. Experiments were carried out which ... download java 8 jre and jdkWebMar 1, 2008 · While dissimilatory ferric iron reduction has been described previously for Acidiphilium spp., this is this first report of this capacity in Acidocella and the moderate … radicals strokesWebJan 12, 2024 · Malik and Hedrich Ferric Iron Reduction in Acidophiles FIGURE 4 Proposed mechanism of iron reduction coupled to hydrogen oxidation by … download java 8 jre macWebJul 1, 1992 · Recent new developments in the field of acidophilic iron metabolism are reviewed and new heterotrophic isolates have been described that are capable of oxidizing ferrous iron. Abstract Redox reactions of iron in acidic environments are of economic and environmental significance, for example, for the leaching of metal ores and for the … radical sr1 kaufen