A comparison of the dissolution behavior of troilite with other iron(II) sulfides; implications of structure

Phosphorus removal from aqueous solutions containing low concentration of phosphate using pyrite calcinate sorbent

“…2). Previous studies also demonstrated that among iron sulfides (pyrite, marcasite, pyr-M, pyr-T, orthogonal troilite and tetragonal mackinawite), pyr-M had the highest chemical activity for oxidation by dissolve oxygen or air (Janzen et al 2000;Lehmann et al 2000;Thomas et al 2003).…”

Aerobic oxidation of mackinawite (FeS) and its environmental implication for arsenic mobilization

“…Elemental sulfur was not reported as a reaction product in the homogeneous oxidation of dissolved sulfides at basic pH (Cline and Richards, 1969;Lefers et al, 1978). Thus, the observed production of S 0 at pH 9.1 likely results from the polymerization of monosulfide as observed for other Fe sulfides (Thomas et al, 1998;Thomas et al, 2003;Chirit ßȃ et al, 2008).…”

“…Therefore, the dissolved sulfide resulting from FeS dissolution via reaction (1) was more likely to be volatilized than oxidized. In parallel to the proton-promoted dissolution (nonoxidative dissolution), FeS may be oxidatively dissolved as suggested for other Fe(II) sulfides such as troilite and pyrrhotite (Thomas et al, 1998;Janzen et al, 2000;Thomas et al, 2001;Thomas et al, 2003):…”

“…Note that x-axis is not in a linear scale. known to be slower by over three order magnitudes than the nonoxidative dissolution (Thomas et al, 2003). Reactions (8) and (9) suggest the equal production rates of dissolved Fe(II) and oxidized sulfur species.…”

Anoxic dissolution of troilite in acidic media

“…However, a limited iron deficiency is allowed even for troilite [1]. Furthermore, an important characteristic of troilite and pyrrhotite consists in the presence of various imperfections on their surface, such as truncated Fe-S bonds, iron deficiency, or the presence of oxidized species of iron and sulfur [2][3][4][5][6][7][8][9][10][11].…”