 | | Journal (article/letter/editorial) | | pages 1915–1918, 2003 Iron-rich precipitates in a mine drainage environment: Influence of pH on mineralogy...sulfide-rich lignite seam exposed in an abandoned mine in the Czech Republic show marked variations in...color and their mineralogy is dominated by schwertmannite. Following confluence with alkaline (pH 8.3)...3) waters that have not been affected by mine drainage, the effluent pH rises to 7.3, the color changes...of the most common secondary minerals produced by mine drainage is complicated by their inherently poor |  | | Report (issue) | | Geological Survey of Finland Special Paper 35 Boris Saltikoff, Kauko Puustinen and Mikko Tontti Metallogenic...deposits in Finland Explanation to the Metallogenic Map of Finland Geological Survey of Finland Espoo 2006...metallic mineral deposits in Finland – Explanation to the Metallogenic Map of Finland. Geologian tutkimuskeskus...tutkimuskeskus – Geological Survey of Finland, Special Paper 35. 66 pages, 19 figures, 2 tables. This paper contains...contains explanations to the Metallogenic Map of Finland 1 : 1 000 000 (Saltikoff et al. 2002). The aim |  | YU, CHANGYUAN, ZHANG, JING, WU, XIAOLEI, LAN, YEQING, ZHOU, LIXIANG (2014) Cr(VI) removal by biogenic schwertmannite in continuous flow column. GEOCHEMICAL JOURNAL, 48 (1) 1-7 doi:10.2343/geochemj.2.0278 | Journal (article/letter/editorial) | | 2343/geochemj.2.0278 Cr(VI) removal by biogenic schwertmannite in continuous flow column CHANGYUAN Y U,1 JING...11, 2013) Adsorption of Cr(VI) by biogenic schwertmannite in a continuous flow column was studied. The...of flow rates, initial pH values, dosages of schwertmannite, and accompanying anions on Cr(VI) adsorption...35.30 mg/g, demonstrating that the biogenic schwertmannite held a high adsorption capacity for Cr(VI)...mechanism for Cr(VI) adsorption by biogenic schwertmannite was proposed using the anion exchange processes |  | | Journal (article/letter/editorial) | | The crystallization behaviour of jarosite and schwertmannite has been studied by precipitation-aging experiments...acidic conditions and ambient temperature. Schwertmannite exhibits low crystallinity and is the only...ripening process leads to the transformation of schwertmannite into natrojarosite. The presence of sodium...obtained phases. TEM observations reveal that schwertmannite particles consist of disoriented nanodomains...amount of structural water is clearly higher in schwertmannite than in natrojarosite. The present results |  | | Journal (article/letter/editorial) | | Removal of As(III) from acidic waters using schwertmannite: Surface speciation and effect of synthesis...2010 Editor: D.B. Dingwell Keywords: Schwertmannite Arsenite Acid mine drainage Surface precipitation Sorption...arsenic(III) from aqueous solution by three different schwertmannite specimens that were synthesized by i) biogenic...oxidation of As(III) occurred on any of the schwertmannite surfaces within 5 days equilibration time even...and Hering, 2003; Ona-Nguema et al., 2005). Schwertmannite, an amorphous Fe-oxyhydroxy sulfate mineral |  | | Journal (article/letter/editorial) | | www.elsevier.com/locate/apgeochem Abiotic schwertmannite transformation kinetics and the role of sorbed...D. Fortin a b s t r a c t Schwertmannite (SHM) precipitated from acid mine drainage often contains high...fate of As(III) preadsorbed to bio-synthesized schwertmannite (0.92 wt% As(III)) during transformation, compared...Ltd. All rights reserved. 1. Introduction Schwertmannite (SHM) is a metastable ferric oxyhydroxy sulfate...75) that is abundant in oxidized and diluted acid mine-drainage (AMD) affected waters (Bigham et al., 1990) |  | | Journal (article/letter/editorial) | | modeling of bacterially induced mineralization of schwertmannite and jarosite in sulfuric acid spring water...their formation. To estimate the solubility of schwertmannite, experimental dissolution in 10.0 mM H2SO4...containing pyrite, and precipitates schwertmannite and jarosite. Schwertmannite appears as a film-like thin layer...also present in close association with the schwertmannite spheres. Results of the experimental incubation...indicates that the solubility product of the schwertmannite having an average chemical composition of Fe8O8(OH)5 |  | | Journal (article/letter/editorial) | | imre region, Mátra Mountains, Hungary. The last mine was closed in 1986 without remediation. In 2006...abandoned shafts and adits still releasing acid mine-drainage owing to the large amount of oxidizing...opportunity for the systematic sampling of the products of mine-waste alterations. One of these accessible “natural...dans les montagnes Mátra, en Hongrie. La dernière mine a fermé en 1986 sans réhabilitation. En 2006, on...Gyöngyösoroszi, Bányabérc, Hongrie. Introduction Abandoned mine-wastes pose potential environmental hazards. Their |  | | Journal (article/letter/editorial) | | Accepted Manuscript Schwertmannite stability in anoxic Fe(II)-rich aqueous solution Susanta Paikaray...as: Paikaray, S., Schröder, C., Peiffer, S., Schwertmannite stability in anoxic Fe(II)-rich aqueous solution...disclaimers that apply to the journal pertain. Schwertmannite stability in anoxic Fe(II)-rich aqueous solution...Stirling, Stirling FK9 4LA, Scotland, UK Abstract Schwertmannite (SHM) is a powerful scavenger for As(III) leading...leading to As(III)-enriched precipitates around acid mine drainage environments that may become exposed to |  | Miyata, Naoyuki, Takahashi, Ayato, Fujii, Tatsuo, Hashimoto, Hideki, Takada, Jun (2018) Biosynthesis of Schwertmannite and Goethite in a Bioreactor with Acidophilic Fe(II)-Oxidizing Betaproteobacterium Strain GJ-E10. Minerals, 8 (3) 98 doi:10.3390/min8030098 | Journal (article/letter/editorial) | | minerals Article Biosynthesis of Schwertmannite and Goethite in a Bioreactor with Acidophilic Fe(II)-Oxidizing...March 2018 Abstract: Iron oxide minerals, schwertmannite and goethite, which are naturally occurring...applications. Although the biosynthesis of schwertmannite by acidophilic Fe(II)-oxidizing microorganisms...and pH 2.5 oxidized Fe(II) and precipitated schwertmannite rapidly. Increasing pH at each temperature...high sorption capacity for metal oxyanions. Schwertmannite was also a good adsorbent for oxyanions, regardless |  | | Journal (article/letter/editorial) | | PHOSPHATES, AND PERCHLORATES Akaganéite and schwertmannite: Spectral properties and geochemical implications...ferric oxyhydroxide minerals akaganéite and schwertmannite are associated with acidic environments and...4830–5210 cm–1) in akaganéite spectra, while in schwertmannite spectra they occur at 1.44–1.48 and 1.95–2...near 1.42 µm (∼7040 cm–1) in akaganéite and schwertmannite spectra and due to OH combination bands in...and transmittance spectra of akaganéite and schwertmannite due to overlapping OH and H2O stretching vibrations |  | | Journal (article/letter/editorial) | | 1326–1337, 2008 The kinetics and mechanisms of schwertmannite transformation to goethite and hematite under...LS2 9JT, U.K. Abstract The transformation of schwertmannite to goethite and/or hematite in high pH solutions... Most of the sulfate was released from the schwertmannite during the early stages of crystallization...crystallization was complete. Sulfate from the initial schwertmannite retarded the dissolution of ferrihydrite, which...goethite to hematite is 103 ± 3 kJ/mol. Keywords: Schwertmannite, ferrihydrite, goethite, hematite, sulfate |  | Murray, Jesica, Kirschbaum, Alicia, Dold, Bernhard, Guimaraes, Edi, Miner, Elisa (2014) Jarosite versus Soluble Iron-Sulfate Formation and Their Role in Acid Mine Drainage Formation at the Pan de Azúcar Mine Tailings (Zn-Pb-Ag), NW Argentina. Minerals, 4 (2) 477-502 doi:10.3390/min4020477 | Journal (article/letter/editorial) | | Formation and Their Role in Acid Mine Drainage Formation at the Pan de Azúcar Mine Tailings (Zn-Pb-Ag), NW Argentina...iron-sulfate minerals control the composition of acid mine waters formed by the oxidation of sulfide in tailings...tailings impoundments at the (Zn-Pb-Ag) Pan de Azúcar mine located in the Pozuelos Lagoon Basin (semi-arid...outcrops. The most abundant compounds in the acid mine drainage (AMD) are SO42−, Fe2+, Fe3+, Minerals...downstream environment. Keywords: sulfide oxidation; mine tailings; soluble iron-sulfate salts; jarosite; |  | | Report (chapter) | | properties. INTRODUCTION TO ACID SULFATE ENVIRONMENTS Mine drainage The best known examples of acid sulfate...may be as many as 500,000 inactive or abandoned mine sites in the United States alone (Lyon et al. 1993)...been seriously damaged by mine effluents. Contamination of natural waters by mine drainage has killed enormous...be unfit for recreational activities. Most acid mine waters have pH values in the range of 2 to 4 (Nordstrom... Bigham & Nordstrom Plumlee et al. 1999). Acid mine drainage occurs when acid production exceeds the |  | | Journal (article/letter/editorial) | | An example is the iron oxyhydroxide known as schwertmannite, which forms as a hydrolysis product from Fe3+...solutions (Bigham et al. 1994). The structure of schwertmannite remains the subject of some debate (Loan et...et al. 2004), but it has been suggested that schwertmannite is structurally similar to β-FeOOH, and that...spiculed-ball morphology that is typical of schwertmannite, and which has been reported for both molybdate...Traina, S.J., Winland, R.L., and Wolf, M. (1996) Schwertmannite and the chemical modeling of iron in acid sulfate |  | Miot, Jennyfer, Lu, Shipeng, Morin, Guillaume, Adra, Areej, Benzerara, Karim, Küsel, Kirsten (2016) Iron mineralogy across the oxycline of a lignite mine lake. Chemical Geology, 434. 28-42 doi:10.1016/j.chemgeo.2016.04.013 | Journal (article/letter/editorial) | | Iron mineralogy across the oxycline of a lignite mine lake Jennyfer Miot a,⁎, Shipeng Lu b,c,1, Guillaume...Available online 19 April 2016 Keywords: Schwertmannite Mine lake Iron snow STXM HRTEM Iron reducing bacteria...formed in the water column of some acidic lignite mine lakes. We investigated the evolution of Fe mineralogy...Microscopy (STXM) at the Fe L2,3-edges and C K-edge. Schwertmannite [Fe8O8(OH)8-2x(SO4)x] identified as the sole...exhibiting the crystal structure of schwertmannite. In contrast, schwertmannite was partly (40%) converted to |  | Maia, Flávia, Pinto, Cláudia, Waerenborgh, João Carlos, Gonçalves, Mário A., Prazeres, Cátia, Carreira, Ondina, Sério, Susana (2012) Metal partitioning in sediments and mineralogical controls on the acid mine drainage in Ribeira da Água Forte (Aljustrel, Iberian Pyrite Belt, Southern Portugal) Applied Geochemistry, 27 (6) 1063-1080 doi:10.1016/j.apgeochem.2012.02.036 | Journal (article/letter/editorial) | | sediments and mineralogical controls on the acid mine drainage in Ribeira da Água Forte (Aljustrel, Iberian...stream that drains the area of the old mine dumps of the Aljustrel mine, which have for decades been a source...source of acid waters. This stream flows to the north for a little over than 10 km, but mixes with a reduced...takes place, and the flux of acid water from the mine dumps is continuous, resulting in the immediate...stream. In particular, evidence suggests that schwertmannite may be precipitating and later decomposing |  | | Journal (article/letter/editorial) | | homepage: www.elsevier.com/locate/apgeochem Schwertmannite and hydrobasaluminite: A re-evaluation of their...R. Fuge a b s t r a c t The solubility of schwertmannite and hydrobasaluminite and their control on...study of natural precipitates confirms that schwertmannite constitutes a major control of Fe3+ concentration...that the precipitation of a highly hydrated schwertmannite (with empirical formula Fe8O8(SO4)x(OH)ynH2O...converge and give log Ksp = 18.8 ± 1.7 for schwertmannite, and log Ksp = 23.9 ± 0.7 for hydrobasaluminite |  | Lane, M. D., Bishop, J. L., Dyar, M. D., Hiroi, T., Mertzman, S. A., Bish, D. L., King, P. L., Rogers, A. D. (2015) Mid-infrared emission spectroscopy and visible/near-infrared reflectance spectroscopy of Fe-sulfate minerals. American Mineralogist, 100 (1) 66-82 doi:10.2138/am-2015-4762 | Journal (article/letter/editorial) | | http://dx.doi.org/10.2138/am-2015-4762 66 acid mine drainage environments; conversely, many Fe2+ sulfates...KFe3(SO4)2(OH)6 ML-S51; ε ch; R <45 μm Copiapo Jarosite Mine, Dona Ana Co., NM Kornelite (pure)f Fe2(SO4)3·7...MgFe4(SO4)6(OH)2·20 H2O ML-S86; ε pellet; R <45 μm Alma Pyrite Mine, Leona Heights, Oakland, Alameda Co., California...FeSO4·H2O 104276; ε ch; R <45 μm Tintic Standard Mine, Dividend, UT; Collection of the Smithsonian-National...K2Fe5Fe3Al(SO4)12·18 H2O 115035; ε ch; R <45 μm United Verde Mine, Jerome, AZ; Collection of the Smithsonian-National |  | Reyes, Martín, Herrera, Guadalupe, Escudero, Ramiro, Patiño, Francisco, Reyes, Iván A., Flores, Mizraim, Palacios, Elia G., Juárez, Julio, Barrientos, Francisco (2022) Surface Spectroscopy of Pyrite Obtained during Grinding and Its Magnetisation. Minerals, 12 (11) 1444 doi:10.3390/min12111444 | Journal (article/letter/editorial) | | ferromagnetic [13–15]. Along with these species, schwertmannite has been reported as an oxy-hydroxysulphate...that appearing at 697 cm−1 corresponded to Schwertmannite, Fe8O8(OH)6SO4 [35]. The band at 1623 cm−1...that appearing at 697 cm−1 corresponded to Schwertmannite, Fe8 O8 (OH)6 SO4 [35]. The band at 1623 cm−1... L.; Murad, E. Schwertmannite, a new iron oxyhydroxysulphate from Pyhäsalmi, Finland, and other localities...Nordstrom, D.K. Stable isotope geochemistry of acid mine drainage: Experimental oxidation of pyrite. Geochim |  | | Journal (article/letter/editorial) | | paper Incongruent weathering of Cd and Zn from mine tailings: A column leaching study D. Kossoff a,b...online 4 December 2010 Editor: J. Fein Keywords: Mine tailings Bolivia Potosí Zn Cd Sphalerite Wurtzite...leaching a b s t r a c t The weathering of discharged mine tailings can contaminate groundwaters, rivers and...Elsevier B.V. All rights reserved. 1. Introduction Mine tailings can be a significant source of Cd and Zn...oxides, hydroxides and sulphates (goethite, schwertmannite, jarosite, other hydrous sulphates (e.g., goslarite |  | | Report (volume) | | and sediment. Concentrated waters associated with mine wastes may precipitate a variety of metal-sulfate...role of soluble sulfate minerals formed from acid mine drainage (and its natural equivalent, acid rock...ENVIRONMENTS .................................... . 351 Mine drainage .........................................CRYSTALLINITY ........................... 362 Schwertmannite [Fe 80 8(0H) 6S04 ·nH 20] ...................a novel mineral species from the Tonopah-Belmont mine, Arizona. Am Mineral 81:244-248 Giester G, Zemann |  | | Thesis/Dissertation | | Mining and benefication activities at the Sanyati mine 35 2.5.1 Historical development 35 2.5.2 Mining...Mining process 36 2.6 HL-SX-EW at the Sanyati mine 37 3 Field- and laboratory work 40 3.1 Fieldwork...Fieldwork 40 3.1.1 Sampling of orebodies and run-of-mine ore dump 40 3.1.2 Sampling of host rock 41 3...leach pads 91 5.1 Characteristics of the run-of-mine ore (ROM) 91 5.2 Composition of the leach pad...6 Composition of goethite and hematite in run-of-mine and leach pad ore 107 6.1 Chrystal chemistry of |  | | Journal (article/letter/editorial) | | HEINRICH5 Division of Geology, University of Helsinki, Finland GFZ German Research Centre for Geosciences Potsdam...partial melting of ancient mafic lower crust in the North China Craton QUAN WAN*, SHANSHAN LI, ZONGHUA QIN...Triassic adakitic rocks in the eastern part of the North China Craton. They are granitic gneisses with high...and pathways of microbial mediated C/N cycling in North Pond, western flank of Mid-Atlantic Ridge FENGPING...mediated C/N cycling in the sediments and rocks of North Pond, western flank of Mid-Atlantic Ridge, which |
|
