Calcium carbonate (CaCO) minerals secreted by marine organisms are abundant in the ocean. These particles settle and the majority dissolves in deeper waters or at the seafloor. Dissolution of carbonates buffers the ocean, but the vertical and regional distribution and magnitude of dissolution are ...
An overview is given of the thermodynamics and kinetics of CaCO3 formation and dissolution and how surface and nanoparticulate chemistry are important in understanding reactivity. Topics covered are major marine carbonate materials, carbonate mineral precipitation and dissolution kinetics relevant to seawater...
CO2 absorption is enhanced by increasing the alkalinity of the solution, and since pH significantly modifies the amount of ionic species present in the aqueous solution, hence, certain carbonate concentrations could be achieved by controlling the pH of water for carbon dioxide dissolution. In the ...
The marine calcium carbonate (CaCO3) cycle is a key component of the global carbon cycle, and is intimately related to atmospheric CO2(ref.1). The formation of CaCO3in the ocean is a process largely controlled by the biological calcification of marine organisms2. Planktonic calcifying organisms ...
after acid dissolution of the solids with a concentrated HCl. 2.2. Mineralogy and morphology of the precipitated calcium carbonatePCCs X-ray diffraction patterns of the PCCs were measured using a powder X-ray diffractometer (Smartlab, Rigaku Co.) with a Cu Kα radiation source (λ =1.54056...
Answer to: Calcium carbonate is insoluble in water. Name two substances that will form a precipitate of calcium carbonate when mixed in solution...
Carbonates are an important component of soil found in dry regions. The main aim of this paper is to investigate the origin of C in soil carbonate and to assess the effect of applied organic residues on carbonate dissolution and crystallization. We measured the delta C-13 of organic carbon (...
A series of the calcium-nickel carbonate solid solutions [(Ca1−xNix)CO3] were synthesized and their dissolution in N2-degassed water (NDW) and CO2-saturated water (CSW) at 25 °C was experimentally investigated. During dissolution of the syntheti
Calcium cations (Ca2+ ) and calcium salts are among the most commonly encountered substances in water, arising mostly from dissolution of minerals. Calcium often is the most abundant cation in river water. Among the most common calcium minerals are the two crystalline forms of calcium carbonate-ca...
A priori predictions of reacidification rates based on Ca carbonate application and historical hydrological data are presented. WAM (Watershed Acidification Model) is a deterministic model that is capable of simulating the movement of water and chemical constituents through a watershed. WAM generates in...