Oct 24, 2008 · Electrochemical splitting of calcium carbonate (e.g., as contained in limestone or other minerals) is explored as a means of forming dissolve hydroxides for absorbing, neutralizing, and storing carbon dioxide, and for restoring, preserving, or enhancing ocean calcification.

Jun 1, 2024 · By employing a Ag catalyst deposited on a gas diffusion layer, we demonstrate CO 2 electroreduction and concurrent storage via mineralisation using seawater, as well as other calcium containing electrolytes.

Oct 1, 2020 · One of the calcium carbonate scale management methods relies on removal of calcium ions from scaling solution by electrochemically enhanced deposition. Application of potential between two electrodes may result in oxygen reduction and water electrolysis.

The present invention provides an electrochemical process for reducing metal contaminants in a calcium carbonate material by dissolving the calcium carbonate material containing the metal...

While essentially insoluble in water, CaCO3 can be dissolved in the presence of the highly acidic anolyte of a water electrolysis cell. The resulting charged constituents, Ca2+ and CO32-,...

Dec 2, 2024 · An electrochemical pathway is developed for brine partial desalination, resource recovery, and CO2 capture and mineralization for the selective precipitation of high-purity calcium carbonate and magnesium hydroxide. In this two-mode electrolysis, magnesium and calcium are separately recovered with efficiencies as high as 87% and 90%, respectively.

Feb 1, 2009 · Electrochemical splitting of calcium carbonate (e.g., as contained in inexpensive and abund ant minerals such as limestone) is proposed as a novel method of forming hydroxide solutions that can absorb, neutralize, and store carbon dioxide from the air or from waste streams.

Aug 16, 2019 · Here, we report a new concept of phosphate removal and recovery, namely a CaCO 3 packed electrochemical precipitation column, which achieved improved removal efficiency, shortened hydraulic retention time, and substantially enhanced stability, compared with our previous electrochemical system.

Apr 14, 2015 · In this paper, a novel method based on membrane electrolysis was proposed and used for carbonation and separation of calcium and magnesium ions from hard water in low voltage.

Jan 2, 2023 · Two scenarios are presented: (1) the precipitation of calcium carbonate and magnesium hydroxide (Mg(OH)2: brucite), with Mg(OH)2 dispersed as solids or dissolved in seawater and pre-equilibrated with CO2under dilute conditions, and (2) the precipitation of calcium and hydrated magnesium carbonates, i.e., when Mg(OH)2 is carbonated under nondilut...