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Physicochemical study of CaCO3 from egg shells

2007; Sociedade Brasileira de Ciência e Tecnologia de Alimentos; Volume: 27; Issue: 3 Linguagem: Inglês

10.1590/s0101-20612007000300035

1678-457X

Fábio S. Murakami, Patrik Oening Rodrigues, Célia Maria Teixeira de Campos, Marcos Antônio Segatto Silva,

Microencapsulation and Drying Processes

Calcium carbonate, a pharmaceutical excipient, is widely used as diluent in solid dosage forms. It is also used as a base for medicinal and dental preparations, a buffering and dissolution aid for dispersible tablets, a food additive and a calcium supplement. Egg shells are a rich source of mineral salts, mainly calcium carbonate, which corresponds to about 94% of the shell. Layer farms produce large amounts of shells, whose final disposal poses a challenge from the environmental standpoint. This work was designed to evaluate the physicochemical and thermal properties of calcium carbonate obtained from egg shells. The findings indicated that calcium carbonate from egg shells can be used as an alternative pharmaceutical excipient.