Polymorphic and Morphological Transformations of CaCO₃ under CO₂ Atmosphere and under the Influence of EDTA at 60 °C

Abstract

Calcium carbonate scale samples were synthesized from calcium chloride solution in the presence of ethylenediamminetetraacetic acid (EDTA) by bubbling CO2 gas. Samples were prepared with different concentrations of EDTA at 60 °C and characterized using XRD, FTIR and SEM techniques. The details revealed that EDTA stabilizes aragonite more efficiently at higher concentrations of EDTA. It was also observed that increasing the concentration of EDTA has no significant impact on the polymorphic specificity where as influence the morphology and the size of the particles.