The nucleation of gypsum into a NaCl solution was studied within a supersaturation range of 2 ] 4 at 25-708C. The experiments were carried out using a lab-scale apparatus consisting of a batch crystallizer with the related measurement de¨ices. Signals of scattered and transmitted light coming from a He ] Ne laser source were analyzed to measure the induction period, that is, the time delay necessary for homogeneous nucleation to take place. Comparison of the experimental results with those pre¨iously obtained in the absence of added NaCl in solution showed that NaCl strongly affects gypsum precipitation. They were compared in terms of the acti¨ation energy and the interfacial tension between crystals and the surrounding aqueous solution.
“Gypsum Nucleation into sodium chloride solutions”
MUSMARRA, Dino
2001
Abstract
The nucleation of gypsum into a NaCl solution was studied within a supersaturation range of 2 ] 4 at 25-708C. The experiments were carried out using a lab-scale apparatus consisting of a batch crystallizer with the related measurement de¨ices. Signals of scattered and transmitted light coming from a He ] Ne laser source were analyzed to measure the induction period, that is, the time delay necessary for homogeneous nucleation to take place. Comparison of the experimental results with those pre¨iously obtained in the absence of added NaCl in solution showed that NaCl strongly affects gypsum precipitation. They were compared in terms of the acti¨ation energy and the interfacial tension between crystals and the surrounding aqueous solution.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
