A Straightforward Treatment of Activity in Aqueous CaCO3 Solutions and the Consequences for Nucleation Theory
A Straightforward Treatment of Activity in Aqueous CaCO3 Solutions and the Consequences for Nucleation Theory
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DOI：
10.1002/adma.201303643
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发表时间：
2014-02-05
影响因子：
29.4
通讯作者：
Gebauer, Denis
中科院分区：
文献类型：
--
作者：
Kellermeier, Matthias;Picker, Andreas;Gebauer, Denis
含水碳酸钙系统的离子活性经过严格研究。理想的治疗被发现是在相关浓度下的良好近似值。数据进一步表明，结合的 CaCO3 物质不能被视为在成核过程中“不活跃”，而是似乎在相分离过程中发挥着关键作用，并且无定形碳酸钙 (ACC) 可以从比之前认为的低得多的过饱和度中沉淀出来。
The aqueous calcium carbonate system is rigorously investigated with respect to ionic activity. Ideal treatment is found to be a good approximation at relevant concentrations. The data further show that bound CaCO3 species cannot be regarded as "inactive" during nucleation but rather appear to play a key role in the phase-separation process, and that amorphous calcium carbonate (ACC) can be precipitated from much lower levels of supersaturation than previously believed.