Effects of Temperature on Morphology and Adsorption Capacity of CaCO3
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Abstract:
In order to study the effect of temperature on morphology and adsorption capacity of CaCO3, the particle sizes and morphology of CaCO3 were characterized by means of FBRM and SEM, and the content of reducing sugars, color and purity of purified juice were also determined. The results showed that at low temperatures of 60 and 70 ℃, small and rod-like CaCO3 particles were formed. And the clarified juice showed low reducing sugar loss and color values (281 and 289 IU, respectively.), while the corresponding apparent purity values were high (93% and 90%, respectively.). However, at high temperature (80 and 90 ℃), the bigger and sphere-shaped CaCO3 particles were obtained. It was also found that theloss of reducing sugar was greater and color values were higher (303 and 385 IU, respectively) than those at low temperatures . The corresponding apparent purity was decreased (87% and 73%, respectively). Consequently, the morphology of CaCO3 and the content of reducing sugars were significantly affected by temperature. With lower temperature, the adsorption capacity of CaCO3 was better and the loss of reducing sugar was less which were both good for clarification.
