Naslov
Precipitation of calcium carbonate polymorphs effectuated through catalytic decomposition of urea in solutions of calcium salts

Autori
Boček, Adrijana ; Bermanec, Vladimir ; Sondi, Ivan

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

Izvornik
19th General Meeting of the International Mineralogical Association, Program & Abstracts / Yamanaka, Takamitsu - Kobe, 2006

Skup
19th General Meeting of the International Mineralogical Association

Mjesto i datum
Kobe, Japan, 23.07.2006. - 28.07.2006

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
calcium carbonate; precipitation; urea

Sažetak
Precipitation processes of carbonate particles of different size, shape, and surface properties have been intensively investigated due to their importance in geo- and biosciences, and in numerous industrial applications. This study describes and discusses a conceptually new method for the precipitation of calcium carbonate polymorphs, effectuated through catalytic decomposition of urea at elevated temperatures and by using Canavalia ensiformis urease enzyme at ambient conditions in solutions of calcium salts. It was found that the formation of different polymorphs of calcium carbonate at elevated temperatures was affected mostly by agitation and by the mixing procedures of reacting solutions. This study has also confirmed that the enzyme macromolecules are important in the development of calcite faces and, as such, they exert significant influence on calcite morphology.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija

POVEZANOST RADA