Effects of EDTA and Boric Acid on the Morphology of CaCO3 Particles

الملخص EN

Calcium carbonate (CaCO3) particles with different morphologies were prepared using calcium chloride (CaCl2) and sodium carbonate (Na2CO3) aqueous solutions containing various amounts of ethylenediamine tetraacetic acid (EDTA) or boric acid.

The products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).

The sphere-like CaCO3 particle was inclined to be formed in EDTA or boric acid solution at room temperature.

The surface of CaCO3 is smooth in the presence of EDTA, and the crystal structure of CaCO3 is majorly vaterite.

However, the CaCO3 has a rough surface in boric acid solution and pure calcite structure.

The size of CaCO3 particle decreases with the increase in the amount of EDTA or boric acid.