Jarosite pseudomorph formation from arsenopyrite oxidation using Acidithiobacillus ferrooxidans

Biosynthesis of natrojarosite by immobilized iron-oxidizing bacteria

“…4 shows a FTIR spectrum with different vibration modes. It indicated that: the absorption peak at 3353 cm −1 was ascribed to the O\H stretching; the ν4, ν3, ν2 and ν1 vibrations of sulfate were represented in the wavenumbers of 626 cm and 1006 cm −1 , respectively (Henao and Godoy, 2010); the vibration peaks of FeO 6 octahedron were observed in the wavenumbers of 511 cm −1 and 473 cm −1 (Sasaki et al, 2006). Consequently, the above results prove the precipitates bio-mediated to be jarosites.…”

Effect of energy source and leaching method on bio-leaching of rock phosphates by Acidithiobacillus ferrooxidans

“…The structure of jarosite formed upon the residues can be also identified by SEM observation of these samples. There were many clusters of round and granular jarosite particles without sharp edges ( Fig.5c-2, d-2, e-1) (Gunneriusson et al, 2009;Henao and Godoy, 2010). Another type of jarosite precipitates was still found to form euhedral compounds with well-developed sharp edges upon the residues (Fig.5e-2) (Wang et al, 2006;Henao and Godoy, 2010).…”

“…There were many clusters of round and granular jarosite particles without sharp edges ( Fig.5c-2, d-2, e-1) (Gunneriusson et al, 2009;Henao and Godoy, 2010). Another type of jarosite precipitates was still found to form euhedral compounds with well-developed sharp edges upon the residues (Fig.5e-2) (Wang et al, 2006;Henao and Godoy, 2010). Furthermore, jarosite precipitates with a regular, smooth, round and crystalline appearance had also formed on the surface of minerals ( Fig.5f-2) (Grishin et al, 1988;Wang et al, 2006).…”

Tracing Mineral Reactions Using Confocal Raman Spectroscopy

“…Examples of natural pseudomorphic mineral replacement span from hydrothermal systems [52] to surface weathering [53] as well as biologically controlled processes [54]. Deciphering the nanoscale mechanism for these reactions helps geoscientists to predict reaction rates as well as the concomitant changes in system chemistry.…”