Synthesis of Calcium Oxalate Particles in Confined Spaces: Emulsion Liquid Membrane (ELM)

Harsh Bharatkumar Shukla

Abstract: Calcium oxalate (CaOx), a biomineral occurs in both plant and the animal kingdom. There are three hydrate forms of Calcium oxalate which are crystallized in different morphologies and the natural occurrence is connected with the three minerals whewellite as (COM) monoclinic monohydrate, (COD) weddilite as orthorhombic dehydrate and (COT) caoxite as triclinic trihydrate. Emulsion Liquid Membrane (ELM) systems is a useful tool for quick and selective removal of metals from dilute aqueous streams. Emulsion liquid membrane process is achieved by preparing an emulsion between two immiscible phases and then dispersing the emulsion formed into a third (continuous) phase by agitation so as to extract a solute from the continuous phase into the inner phase of the emulsion or vice-versa. The membrane phase is the liquid that separates the encapsulated internal droplets within the emulsion from the external continuous phase. Calcium oxalate used as filler and a pigment in coated paper and the cardboard industry to impart brightness.

Keywords: Calcium Oxalate, COM, COD, COT, Concentration Precursor, ELM