Obtención de carbonato de calcio de conchas de piangua

Abstract

Obtaining Calcium Carbonate from piangua shells. The piangua shells Andara spp, collected in a swamp of the Buenaventura, Valle del Cauca, Colombia, was process for digestion in cold with analytic hydrochloric acid (37%) (Treatment A) or commercial hydrochloric Acid (27%) (Treatment B). The yield of carbonate of calcium was 82.48% and 77.21% respectively. El test of atomic absorption threw 30.21+4% aand 27.62+0.165 of Ca, without significant differences (P <0.05). The particle size presented 80%=0.438um, X ray mineral analisys for diffraction sowed glasses of CaCO3 with prevalence of Aragonita (=40%); followed by Dolomita and Calcita between 10 and 20% respectively. The espectrografic analysis threw a concentration Calcium of > 20%.