文献类型：期刊文献

英文题名：Qualitative discussion of prenucleation cluster role in crystallization of calcium carbonate under high concentration of magnesium based on experimental phenomena

作者：Zhang, Jie[1];Sun, Yuzhu[1];Yu, Jianguo[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China

年份：2017

卷号：478

起止页码：77

外文期刊名：JOURNAL OF CRYSTAL GROWTH

收录：;EI(收录号：20173604114442);WOS:【SCI-EXPANDED(收录号:WOS:000413647300013)】；

基金：The authors would like to thank the financial support from Natural Science Foundation of China (NSFC, No. U1507105), National Sci-Tech Support Plan (No. 2015BAB10B01), National Key R&D Program (No. 2016YFC0401203).

语种：英文

外文关键词：Multistep crystallization; Non-classical nucleation; Prenucleation cluster; Amorphous calcium carbonate; Local mixing

摘要：Crystallization of calcium carbonate under high concentration of magnesium was studied. Interesting phenomena were observed. Approximately 80% of calcium ions stably existed in the solution up to 60 min after amorphous calcium carbonate was separated by centrifugation, and induction time was significantly affected by concentration and feeding rate of sodium carbonate when other operating conditions remained unchanged. Experiments and computer simulation have proved that prenucleation cluster exists during crystallization of calcium carbonate in solutions. This paper tried to figure out specific crystallization process of calcium carbonate under high concentration of magnesium, and to interpret unforeseen phenomena combining with the idea of prenucleation cluster. With regarding prenucleation cluster which can incorporate magnesium into its structure as amorphous calcium carbonate, most of the phenomena including significant influence of local mixing could be better understood. Prenucleation cluster played an important role in crystallization of calcium carbonate, which was related to the induction time, morphology and final product, thus more fundamental studies of prenucleation cluster structure and magnesium role in it should be done. (C) 2017 Elsevier B.V. All rights reserved.