Influence of polyvinylpyrrolidone on the precipitation of calcium carbonate and on the transformation of vaterite to calcite

Calcium Carbonate Precipitation for CO2 Storage and Utilization: A Review of the Carbonate Crystallization and Polymorphism

“…FiGURe 2 | Polymorph formation mechanism of the precipitated calcium carbonate, adapted from Wei et al (2003). It is being reproduced with permission from the copyright holder.…”

“…vaterite can be formed at ambient conditions owing to the kinetic constraints induced by synthesis factors such as temperature and impurities (e.g., Mg) (Ogino et al, 1987;Zhang et al, 2012), which can lead to crystallization of less stable aragonite or the least stable vaterite rather than forming calcite. A number of mechanistic studies have been conducted thus far to reveal the transformation mechanisms among the CaCO3 polymorphs (Kralj et al, 1997;Spanos and Koutsoukos, 1998;Katsifaras and Spanos, 1999;Wei et al, 2003;Rodriguez-Blanco et al, 2011;Zhang et al, 2012;Kabalah-Amitai et al, 2013;Nielsen et al, 2014). Although it is necessary to heat to temperature exceeding 730 K for irreversible transformation of vaterite to calcite (Chang et al, 2017), the least stable vaterite can be stabilized in an aqueous solution at ambient conditions preventing its transformation into calcite or aragonite (Trushina et al, 2014).…”

“…Although it is necessary to heat to temperature exceeding 730 K for irreversible transformation of vaterite to calcite (Chang et al, 2017), the least stable vaterite can be stabilized in an aqueous solution at ambient conditions preventing its transformation into calcite or aragonite (Trushina et al, 2014). Despite ongoing debate (Kamhi, 1963;Wang and Becker, 2009;Kabalah-Amitai et al, 2013), the formation of vaterite and its transformation mechanisms among the polymorphs can be explained in terms of sequential dissolution and (re)crystallization processes (Figure 2) (Kralj et al, 1997;Spanos and Koutsoukos, 1998;Katsifaras and Spanos, 1999;Wei et al, 2003): (i) initially formed ACC particles transform to the least stable vaterite and (ii) the most soluble vaterite undergoes dissolution and crystallization finally forming the most stable calcite. The solubility of the CaCO3 polymorphs is in decreasing order of ACC, vaterite, aragonite, and calcite (Beck and Andreassen, 2010).…”

Soil bacteria that precipitate calcium carbonate: mechanism and applications of the process

“…Chen, Okudan & Riley (2010) found that CaCO 3 produced by Proteus mirabilis had an unusual morphology and structure, mainly formed by vaterite spheres. CaCO 3 precipitation by a mixture of Ca 2+ and CO 3 -2 involves three steps as follows: 1) amorphous calcium carbonate formation with low stability and solubility, 2) their transformation into vaterite, and 3) obtaining calcite which is the most stable solid state of CaCO 3 (Hua, Deng, Thornton, Yang & Amonette, 2007;Shen et al, 2006;Spanos & Koutsoukos, 1998;Wei, Shen, Zhao, Wang & Xu, 2003).…”

Morphosynthesis of CaCO3 at different reaction temperatures and the effects of PDDA, CTAB, and EDTA on the particle morphology and polymorph stability

“…Literature resources provide a wide variety of organic additives employed in the morphosynthesis of CaCO 3 . Among these additives are some organic solvents in the presence of CTAB [8], PVP [9], soluble proteins extracted from nacre [10], PEG, PVA, CTAB, and PAA [11], using of amino acids [12], applying ethanol as a solvent [13], and others.…”