Investigation of dissolution kinetics of natural magnesite in gluconic acid solutions

Principles of demineralization: Modern strategies for the isolation of organic frameworks

“…Despite a number of studies on calcite dissolution in the presence of organic ligands (Perry et al, 2004(Perry et al, , 2005Fredd and Fogler, 1998a,b;Wu and Grant, 2002;Frye and Thomas, 1993;Hoch et al, 2000;Thomas et al, 1993;Compton and Sanders, 1993;Compton and Brown, 1995;Spanos et al, 2006a,b), rarely the effect of variable ligand concentration on the dissolution rate has been rigorously quantified. There are a few data on magnesite dissolution in the presence of ligands at some technologically relevant solution conditions (Hamdona et al, 1995;Demir et al, 2003;Laçin et al, 2005;Bayrak et al, 2006) and Jordan et al (2007) studied ligandcontrolled magnesite dissolution at 100 8C and low pCO 2 in the presence of a single concentration (0.01 M) of organic and inorganic ligands via a combination of macroscopic rate measurements and hydrothermal AFM. In order to extend the range of ligand concentrations to broader environmental conditions, Pokrovsky et al (2008) performed detailed study on calcite and magnesite dissolution in the presence of variable (10 À5 to 10 À2 M) ligand concentrations at conditions pertinent to CO 2 storage basins (60 8C, 30 atm pCO 2 , pH 4.5-5.5).…”

Investigation dissolution behaviours and kinetics parameters of ulexite in boric acid solution

“…2 ,16-18 To reveal behaviors of leaching, some different acids such as organic acids of citric acid, lactic acid, acetic acid, gluconic acid have been tested on different boron minerals. [19][20][21] However, while the selectivity of organic acids is high, they are weak and exhibit low activity. 3 Also, some inorganic acids such as ammonium nitrate, sulfur dioxide saturated water, sulfuric acid, hydrogen sulfate, ammonium chloride, and phosphoric acid have also been used in various studies related to ulexite.…”

Leaching of Nigeria Limonitic Laterite using Acidified Sodium Thiosulphate

“…Generally, the process can be considered in three parts: first, the change of phase of the solid as it dissolves in the solvent, secondly, its diffusion through the solvent in the pores of the solid to the outside of the particle, and thirdly, the transfer of the solute from the solution in contact with the particles in the main bulk of the solution [6]. Inorganic acids have been commonly used as leaching reagents in most studies but in recent years organic acid is in use [7]., [8]., [9]., [10]., [11]., [12]. Also autotrophic [13]., and heterotrophic [14]., [15]., [16].,microorganisms possess the potential to remove nickel from its ores.…”