Struvite crystal growth inhibition by trisodium citrate and the formation of chemical complexes in growth solution

Autor:	Jolanta Prywer, Ewa Mielniczek-Brzóska, Marcin Olszynski
Rok vydání:	2015
Předmět:	chemistry.chemical_classification Aqueous solution Base (chemistry) Chemistry Precipitation (chemistry) Inorganic chemistry Nucleation Condensed Matter Physics law.invention Inorganic Chemistry Ammonia chemistry.chemical_compound law Struvite Materials Chemistry Crystallization Trisodium citrate
Zdroj:	Journal of Crystal Growth. 418:92-101
ISSN:	0022-0248
DOI:	10.1016/j.jcrysgro.2015.02.027
Popis:	Effect of trisodium citrate on the crystallization of struvite was studied. To evaluate such an effect an experiment of struvite growth from artificial urine was performed. The investigations are related to infectious urinary stones formation. The crystallization process was induced by the addition of aqueous ammonia solution to mimic the bacterial activity. The spectrophotometric results demonstrate that trisodium citrate increases induction time with respect to struvite formation and decreases the growth efficiency of struvite. The inhibitory effect of trisodium citrate on the nucleation and growth of struvite is explained in base of chemical speciation analysis. Such an analysis demonstrates that the inhibitory effect is related with the fact that trisodium citrate binds NH 4 + and Mg 2+ ions in the range of pH from 7 to 9.5 characteristic for struvite precipitation. The most important is the MgCit − complex whose concentration strongly depends on an increase in pH rather than on an increase in citrate concentrations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b99e79f1af89bdd23c27926af8e1495c https://doi.org/10.1016/j.jcrysgro.2015.02.027 Zobrazit plný text záznamu Full Text from ScienceDirect