Abstract
The adsorption of ammonia gas on nanoparticle hydroxyapatite (HA) prepared from bovine bone was investigated. HA is well known as a good adsorbent for both of gas and liquid adsorbate. In this study, bovine bone was cleaned, calcined at 700 °C for 4 hrs and subsequently ground. The ground bovine bone powder was the starting material for synthesize of nanoparticle HA via precipitation. As-precipitated HA nanoparticles were filtered, washed and finally calcined at 500, 700, 1000 °C. Phase analyses were performed by X-ray diffraction (XRD) and the result showed that the higher the calcined temperature, the higher the degree of crystallinity. The result of ammonia (NH3) gas adsorption indicated that as-precipitated HA with low crystallinity displayed better adsorption activity to NH3 gas than calcined HA with high crystallinity.
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