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Gypsum nucleation into sodium chloride solutions
Author(s) -
Prisciandaro Marina,
Lancia Amedeo,
Musmarra Dino
Publication year - 2001
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690470415
Subject(s) - supersaturation , nucleation , gypsum , aqueous solution , surface tension , precipitation , chemistry , sodium , homogeneous , thermodynamics , classical nucleation theory , chemical engineering , mineralogy , inorganic chemistry , materials science , composite material , meteorology , physics , organic chemistry , engineering
The nucleation of gypsum into a NaCl solution was studied within a supersaturation range of 2–4 at 25–70°C. The experiments were carried out using a lab‐scale apparatus consisting of a batch crystallizer with the related measurement devices. 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 previously obtained in the absence of added NaCl in solution showed that NaCl strongly affects gypsum precipitation. They were compared in terms of the activation energy and the interfacial tension between crystals and the surrounding aqueous solution.