GROWTH RATE OF HYDROXYAPATITE CRYSTALS OBTAINED BY PRECIPITATION

Journal article

Authors / Editors

Agachi, Paul

Research Areas

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Publication Details

Author list: Dejeu VR, Reka B, Cormos AM, Sara BE, Agachi PS

Publisher: UNIV ATHENS FIRST DEPT OBSTETR

Place: CLUJ-NAPOCA

Publication year: 2010

Journal acronym: STUD U BABES-BOL CHE

Volume number: 55

Issue number: 2

Start page: 179

End page: 188

Number of pages: 10

ISSN: 1224-7154

Languages: English-Great Britain (EN-GB)

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Abstract

Identification of a precipitation process consists in the formulation of a mathematical model which describes the real system characteristics. The model parameters have physical significance in terms like growth rate, nucleation rate or population density of particles. In the present work, the precipitation kinetics of hydroxyapatite (HAP) was studied at the laboratory scale using a 0.5 L batch reactor. The vessel was operated continuously at 25 degrees C and 50 degrees C at different feed concentrations. A methodology already known for other systems was applied to determine the kinetic parameters (growth rate) from the crystal size distribution (CSD) in the preparation of hydroxyapatite. Predicted particle size characteristics shown reasonable agreement with experimental data collected. The influence of feed concentration on particle size of hydroxyapatite was discussed too.

Keywords

growth rate, hydroxyapatite, mathematical, Particle formation, Population balance, Precipitation

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