Anoxic dissolution of troilite in acidic media

Iron monosulfide (FeS) oxidation by dissolved oxygen: characteristics of the product layer

“…On the other hand, the cracks could be the relicts of SRL breakage as a consequence of tension exercised by H 2 S formed under this layer. [9] It is reasonable to assume that the SRL breakage chiefly occurs during the first time period of dissolution experiments (probably the first hour, if we take into consideration the results of previous studies [1,4,6,9] ) when [H + ] at FeS surface is high enough to produce H 2 S surges. [1,9] Over SRL layer there are particles with different shapes and dimensions.…”

Kinetics of pyrite to pyrrhotite reduction by hydrogen in calcite buffered solutions between 90 and 180°C: Implications for nuclear waste disposal

“…(2)), as discussed by Jerz and Rimstidt (2004), Chirita and Descostes (2006a,b) and Huminicki and Rimstidt (2009) in the framework of pyrite and troilite oxidation, a reaction order of 0.5 for hydrogen should be found in the case of a pure diffusive mechanism. If we assume that the amount of H 2 consumed is equal to the amount of sulfide released in the system, the total amount of sulfide is expected to vary as a function of both t 0.5 and PH 2 0.5 (Chirita and Descostes, 2006a):…”

Troilite oxidation by hydrogen peroxide

“…Prior to the dissolution experiments, the sample of troilite was prepared following the procedure described by Chirita and Descostes [5]. BET surface area of the unreacted troilite particles, as previously reported, was 0.5053 ± 0.0031 m 2 g −1 .…”

“…The sample of synthetic troilite (FeS) used in this study has been previously described in detail elsewhere [5]. Prior to the dissolution experiments, the sample of troilite was prepared following the procedure described by Chirita and Descostes [5].…”

“…The others series' members have collaterally addressed troilite nonoxidative dissolution (in deoxygenated HClO 4 solutions) and oxidative dissolution (by molecular oxygen and ferric iron), respectively. Chirita and Descostes [5] have studied troilite anoxic dissolution at 50 • C and found that this process leads to the sulfur enrichment of troilite surface and is controlled by the reaction products (Fe 2+ and H 2 S) diffusion through the solid layer forming on the surface.…”