Sulfur Dioxide and the Production of Sulfuric Acid on Present-day and Early Mars: Implications for the Lack of Detected Carbonates on the Surface
نویسندگان
چکیده
Introduction: Measurements from the Viking Landers and Mars Pathfinder have shown that sulfur is a significant component of the surface of Mars [1]. However, one of the major and most surprising findings of the Mars Exploration Rovers [2] and the ESA Mars Express OMEGA instrument [3, 4, 5] is how widespread sulfate minerals, in the form of gypsum (CaSO 4
منابع مشابه
Sulfur dioxide inhibits calcium carbonate precipitation: Implications for early Mars and Earth
[1] Recent studies have suggested a role for sulfur dioxide (SO2) in maintaining relatively warm surface temperatures on early Mars. Here we show experimentally, that SO2 concentrations orders of magnitude lower than those required for it to have been of climatic importance strongly affect the aqueous chemistry and the precipitated mineral assemblage. At near-neutral pH, part-per-billion concen...
متن کاملPreparation, Physiochemical and Kinetic Investigations of V2O5/SiO2 Catalyst for the Sulfuric Acid Production
V2O5/SiO2 catalyst was utilized to oxidize SO2 to SO3 species in the presence of oxygen mainly for producing sulfuric acid. For this catalyst, the active phase was a mixture of vanadium pentoxide and basic sulfate/pyrosulfate material. This active phase at the reaction temperature behaved as a liquid filling up the pores of the silica support. On the other hand, amounts of the SO3 and V5+ speci...
متن کاملCould Some Craters on Mars Have Acid Water Origins?
Introduction: Physical sedimentology experiments using a 39% concentration of sulfuric acid have produced three distinct features, which are similar to features seen on Mars. However, these sedimen-tary features could not be created using pure water in the laboratory. These three features include deeply-incised, narrow channels, cracks that run parallel to the flow direction, and circular depre...
متن کاملA sulfur dioxide climate feedback on early Mars.
Ancient Mars had liquid water on its surface and a CO2-rich atmosphere. Despite the implication that massive carbonate deposits should have formed, these have not been detected. On the basis of fundamental chemical and physical principles, we propose that climatic conditions enabling the existence of liquid water were maintained by appreciable atmospheric concentrations of volcanically degassed...
متن کاملThe comparison of digestibility of treated sugarcane tops silage by bacteria or whole microorganisms of Holstein cow and buffalo rumen
The aim of this study was to evaluate the effects of adding sulfuric acid to sugarcane topssilage on rumen bacteria and whole rumen microorganisms (WRM) and compare the digestibility of sugarcane tops treated with different amount of urea, molasses and sulfuric acid between Holstein cow and Khouzestan buffalo. Regardless of the type of the treatment, potential of gas production (B) by cow WRM (...
متن کامل