Naslov
The influence of some naturally occuring minerals on the precipitation of calcium carbonate polymorphs

Autori
Vdović, Neda ; Kralj, Damir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of the ..... ; u: Rapports et proces verbaux des réunions - Commission internationale pour l'exploration scientifique de la mer Méditerranée 35 (1998) (1) / - , 1998, 300-301

Mjesto i datum
,

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
calcium

Sažetak
In this work precipitation of calcium carbonates, initiated by the addtion of suspended mineral particles (quartz, kaolinite or montmorillonite) was investigated. In the precipitation system the initial concentrations of calcium and carbonate species, as well as the ionic strength, were similar to those in seawater. In the model syste, in which no mineral particles were added, vaterite was the only solid phase precipitated after an induction period of approximately two minutes. Quartz had no influence on the precipitation, while the addition of kaolinite to the system partially inhibited the precipitation process ; the effect could probably be attributed to the organic matter desorbed from the surface. In contrast, the addition of calcium montmorillonite, caused an instantaneous precipitation of calcite thus indicating montmorillonite to be a suitable substrate for the overgrowth of this polymorphs.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA