Model study of initial adsorption of SO2 on calcite and dolomite

Molecular interactions of SO2 with carbonate minerals under co-sequestration conditions: A combined experimental and theoretical study

“…Our molecular dynamics simulations tested whether such transformation can occur at lower water contents. At temperatures below the decomposition temperature of calcareous rocks, a simple reaction can be written to produce sulfites/sulfates from calcite (Malaga-Starzec et al, 2004;Al-Hosney and Grassian, 2005;Baltrusaitis et al, 2007;Olaru et al, 2010):…”

Black layers on historical architecture

“…The observations carried out fit to the model recently proposed by other authors (Elfving et al 1994;Ausset et al 1999;Ausset et al 2000;Maravelaki et al 2002). A sort of pseudomorphism of gypsum after calcite takes place (Vergès-Belmin 1994): the corrosion process starts from the boundaries of calcite grains (Malaga-Starzec et al 2004) and goes on penetrating through crystal structure and along pre-existent micro-fractures; it may happen that some calcite fragments, still under sulphation, are visible in the crust (Fig. 5d)-the cleavage lines and twinning planes along which the decay agent is corroding calcite and forming gypsum are quite evident.…”

La composición mineralógica de la arenisca y su influencia en la deposición de dióxido de azufre

“…En el caso de la arenisca de Pliezhaus, la sulfatación del cemento de dolomía y calcita es el mecanismo predominante para la fijación de SO 2 en forma de yeso. En este proceso debe tenerse en cuenta el comportamiento distinto de la dolomía y la calcita, como se describe en (12). Sin embargo, los mecanismos de fijación del dióxido de azufre en la arenisca no calcárea son menos conocidos.…”

“…Many studies have shown that calcareous stone reacts intensely with gaseous pollutants partly via carbonate dissolution and partly via sulphate or nitrate crystallization on the surface or in the pore network (8)(9)(10)(11)(12). Dannecker and Steiger disolución de carbonato pero también por la cristalización de los sulfatos o nitratos sobre la superficie o dentro del sistema poroso (8)(9)(10)(11)(12). Dannecker y Steiger (13) afirmaron incluso que la principal fuente de sales en las fachadas de piedra eran la deposición de dióxido de azufre y su reacción con el sustrato pétreo.…”

“…In Pliezhauser sandstone, dolostone/calcite cement sulphation is the dominant mechanism for the fixation of SO 2 in the form of gypsum The differences in dolomite and calcite behaviour as described in (12) are instrumental to this process. The mechanisms involved in sulphur dioxide fixation in non-calcareous sandstone are less well understood, however.…”