Search

The interaction between dacitic tuff and calcium hydroxide under hydrothermal conditions has been investigated. At a ratio of CaO/SiO2 = 0.3–1.5 : 1 and at a ratio between the liquid phase and the solid phase amounting to 10 : 1, after 2 h at 220°C, calcium hydroxide is completely bound. As a result of the destruction of potassium feldspar in tuff, potassium can be transformed into a plant-digestible form.

The paper discusses the prospects of using metal-air electrochemical current sources, in particular the advantages of using magnesium as an anode. The methods for increasing the efficiency of the anode, electrolyte and cathode are analyzed. Moreover, the paper presents the comparative electrochemical characteristics of various metals used as an anode, their effectiveness, advantages, and availability. At the same time, this research considers a number of problems that are specific to metal-air current sources and ways to overcome them. We discuss the methods for reducing the cost of magnesium production and utilization of the by-product of the reaction – magnesium hydroxide based on a new technology (ECOATOM, LLC; Republic of Armenia).