Geochemical modeling of bacterially induced mineralization of schwertmannite and jarosite in sulfuric acid spring water

Kawano, Motoharu; Tomita, Katsutoshi

doi:10.2138/am-2001-1005

Cited by 131 publications

(73 citation statements)

References 26 publications

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“…Morphology and mineral composition of the rust-colored aggregates formed during oxic microcosm incubations was similar to iron snow sampled from the lake. Because chemical oxidation was never observed, microorganisms appeared to mediate both Fe(II) oxidation and iron snow formation as was assumed in previous studies (Bigham et al 1990;Childs et al 1998;Kawano and Tomita 2001). Bacterial cell surfaces may trigger the precipitation of mineral phases as indicated by the CLSM data (Fig.…”

Section: Discussionsupporting

confidence: 56%

“…While the oxidation of S 22 (Jørgensen et al 1991;Lü thy et al 2000) and CH 4 (Rudd et al 1974;Liu et al 1996;Bédard and Knowles 1997) at redoxclines has been extensively investigated, less information is available about the oxidation of Fe(II). Some evidence for the cycling of iron at pelagic boundaries exists (Campbell and Torgersen 1980;Boehrer and Schultze 2006;Díez et al 2007), and the formation of Fe(III)-minerals in acidic aquatic environments has been linked to a microbial oxidation of Fe(II) in the water column (Childs et al 1998;Peine et al 2000;Kawano and Tomita 2001). Similar processes might have occurred in the Late Paleoproterozoic, leading to the formation of Paleozoic ironstones within the redoxclines of ancient marine sediments (Bekker et al 2010).…”

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confidence: 99%

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Pelagic boundary conditions affect the biological formation of iron‐rich particles (iron snow) and their microbial communities

Reiche

Ciobotă

et al. 2011

Limnology & Oceanography

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We studied the formation of iron-rich particles at steeply opposing gradients of oxygen and Fe(II) within the redoxcline of an acidic lignite mine lake (pH 2.9). Particles formed had a diameter of up to 380 mm, showed high sedimentation velocity (, 2 m h 21 ), and were dominated by the iron mineral schwertmannite. Although the particles were highly colonized by microbial cells (, 10 10 cells [g dry weight] 21 ), the organic carbon content was below 11%. Bathymetry and the inflow of less acidic, Fe(II)-rich groundwater into the northern basin of the lake results in two distinct mixing regimes in the same lake. The anoxic monimolimnion of the northern basin had higher pH, Fe(II), dissolved organic carbon, and CO 2 values compared with the more central basin. Particles formed in the northern basin differed in color, were smaller, had higher organic carbon contents, but were still dominated by schwertmannite. Microcosm incubations revealed the dominance of microbial Fe(II) oxidation.

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Section: Discussionsupporting

confidence: 56%

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confidence: 99%

Pelagic boundary conditions affect the biological formation of iron‐rich particles (iron snow) and their microbial communities

Reiche

Ciobotă

et al. 2011

Limnology & Oceanography

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“…These so-called "ochre precipitates" consist of Fe-phases precipitated from the AMD. In contrast with other well crystallized products of pyrite oxidation, such as hematite or goethite, these mine drainage minerals (MDM; Murad et al, 1994) consist of poorly crystallized oxyhydroxides and oxyhydroxysulphates of fibrous to spherical morphology such as ferrihydrite and schwertmannite, in addition to jarosite and goethite, showing extremely small particle size (b 1 nm spherical particle diameter) (Bigham et al, 1990(Bigham et al, , 1996Carlson and Schwertmann, 1981;Dold, 2003;Fukushi et al, 2003;Kawano and Tomita, 2001;Majzlan et al, 2004;Murad et al, 1994;Nordstrom and Alpers, 1999;Regenspurg et al, 2004;Williams et al, 2002;Yu et al, 1999), which greatly enhance the reactive surface area, allowing the metal adsorption to these mineral phases.…”

Section: Discussionmentioning

confidence: 99%

An integrative assessment of environmental degradation of Caveira abandoned mine area (Southern Portugal)

Silva

Durães

Reis

et al. 2015

Journal of Geochemical Exploration

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Since the end of the 1990s the Portuguese Iberian Pyrite Belt (IPB) is a typical European post-mining region with significant problems related to acid mine drainage (AMD), metal dispersion, mine waste management and unsafe mining infra-structures. The Portuguese government is providing particular attention on the sulphide abandoned mines and doing considerable investments on the mining recovery all over the country. The former Caveira mine was closed in the 1980s. It is considered an extremely impacted site due to the dimension of the areas affected by mining activities. Tailings, mine addicts and associated waste rock dumps, resulting from 129 years of pyrite and Cu exploitation, are spread along the Grândola stream. Despite the semi-arid climatic conditions of the area, the tailings are considerably eroded by the surficial waters, particularly during rainfall events. The past mining and smelting activities have resulted in severe contamination of the Grândola stream and its tributary by AMD (pH b 2) as well as degradation of surrounding stream sediments, soils and vegetation. In order to evaluate possible environmental risks, a sediment and surface water survey was carried out downstream the Caveira mine. The acidic effluent and mixed stream water show high Al, As, Ca, Cd, Cu, Fe, Hg, Mg, Mn, Ni, Pb and SO 4 concentrations, with several of these contaminants exceeding local and/or surface water quality standards. The data show a strong seasonal variation of surface water quality with poorer water quality during the dry and rainy seasons caused by evaporation and efflorescent salt dissolution, respectively. The variable flow regime at the local streams causes dilution of AMD rich in trace metals reaching background within 14 km downstream. The potential toxicity of stream metal concentrations was determined using cumulative criterion unit (CCU) scores and the modified AMD index (MAMDI), which highlighted As, Cd, Cu, Pb and Zn as the major sources of potential chronic stream toxicity, with emphasis on winter season. Although the threshold of the likely harm to aquatic life is exceeded at all sites, the two indexes highlight differences relating to the extension of contamination effects. The Average Index of Toxicity (AIT) showed that sediment contamination is very high even when the distance to mine promoted a decreasing in water metal concentrations, which are being precipitated in the sediments due to pH increase.

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“…It has the ability to induce mineral deposition such as carbonic acid/phosphoric acid/sulphate. Microbial-induced mineralization mainly can be defined as the mineralization process caused by the interaction of microbial life activities with the surrounding environment [2]. Soil mineral-microbial interactions are the most basic biogeochemical effects [3,4].…”

Section: Introductionmentioning

confidence: 99%

Effects of Montmorillonite on the Mineralization and Cementing Properties of Microbiologically Induced Calcium Carbonate

Zhu¹,

Li²,

Shi³

et al. 2017

Advances in Materials Science and Engineering

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Carbonate mineralization microbe is a microorganism capable of decomposing the substrate in the metabolic process to produce the carbonate, which then forms calcium carbonate with calcium ions. By taking advantage of this process, contaminative uranium tailings can transform to solid cement, where calcium carbonate plays the role of a binder. In this paper, we have studied the morphology of mineralized crystals by controlling the mineralization time and adding different concentrations of montmorillonite (MMT). At the same time, we also studied the effect of carbonate mineralized cementation uranium tailings by controlling the amount of MMT. The results showed that MMT can regulate the crystal morphology of calcium carbonate. What is more, MMT can balance the acidity and ions in the uranium tailings; it also can reduce the toxicity of uranium ions on microorganisms. In addition, MMT filling in the gap between the uranium tailings made the cement body more stable. When the amount of MMT is 6%, the maximum strength of the cement body reached 2.18 MPa, which increased by 47.66% compared with that the sample without MMT. Therefore, it is reasonable and feasible to use the MMT to regulate the biocalcium carbonate cemented uranium tailings.

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Geochemical modeling of bacterially induced mineralization of schwertmannite and jarosite in sulfuric acid spring water

Cited by 131 publications

References 26 publications

Pelagic boundary conditions affect the biological formation of iron‐rich particles (iron snow) and their microbial communities

Pelagic boundary conditions affect the biological formation of iron‐rich particles (iron snow) and their microbial communities

An integrative assessment of environmental degradation of Caveira abandoned mine area (Southern Portugal)

Effects of Montmorillonite on the Mineralization and Cementing Properties of Microbiologically Induced Calcium Carbonate

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