Precipitation and Transformation of Vaterite Calcium Carbonate in the Presence of Some Organic Solvents.

ABSTRACT: In this paper, the production of CaCO3 particles via the carbonation route in the reaction of CaCl2 and CO2, using NH3 as a promoter of CO2 absorption, was studied. The solvents used as the reaction media for CaCO3 precipitation were aqueous solutions of methanol, isopropanol and dimethyl sulfoxide (DMSO), in a concentration range of 0-20% (v/v). It was found that the presence of an organic additive influenced the precipitation rate, the content of vaterite in the obtained product, the morphology and the size of the precipitated CaCO3 particles, as well as the rate of its transformation into calcite. The presence of all added organic solvents reduced the vaterite concentration in the produced CaCO3 both at the end of the reaction and after incubation in the reaction medium for 1 h. However

SUBMITTER: Konopacka-Lyskawa D 

PROVIDER: S-EPMC7344821 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature