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Original scientific paper

https://doi.org/10.5562/cca3806

Precipitation of Calcium Oxalate Monohydrate Under Nearly the Same Initial Supersaturation

Nives Matijaković Mlinarić orcid id orcid.org/0000-0002-3751-1790 ; Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
Silvija Šafranko ; Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Franje Kuhača 18, 31000 Osijek, Croatia
Bernarda Vidas ; Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia
Dominik Goman ; Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia
Stela Jokić ; Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Franje Kuhača 18, 31000 Osijek, Croatia
Jasminka Kontrec ; Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
Branka Njegić Džakula ; Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia
Ida Delač Marion ; Center of Excellence for Advanced Materials and Sensing Devices, Institute of Physics, Bijenička cesta 46, 10000 Zagreb, Croatia
Martina Medvidović‑Kosanović orcid id orcid.org/0000-0002-9887-9169 ; Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia
Anamarija Stanković orcid id orcid.org/0000-0001-5090-0435 ; Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000 Osijek, Croatia


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Abstract

Spontaneous precipitation of calcium oxalate monohydrate (COM) in additive-free systems with nearly the same initial supersaturation has been investigated. The influence of thermodynamic parameters such as: temperature (t = 25, 36.5 and 48 °C), calcium concentration range of 5 mmol dm−3 ≤ ci(Ca2+) ≤ 10 mmol dm−3 and pH (5.6, 6.5 and 7.5), on the potential changes in structure, morphology and crystal size of COM have been studied. The values of the initial parameters were varied in a wide range and included values relevant for mimicking the physiological conditions related to those in biological systems and kidney stone formation. The results contributed to the knowledge about the influence of the selected individual parameters as well as their interplay influence on in vitro precipitation of COM. The findings have indicated that COM was the only precipitated phase exhibiting predominant dendritic morphology. The effects on crystal size, structure and morphology are more pronounced at higher temperature, pH and calcium concentration. These results provide basis for future studies of overall mechanism of COM formation and the future studies of kidney stone prevention.

This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

calcium oxalate monohydrate, thermodynamic parameters, crystal size and morphology, supersaturation

Hrčak ID:

265334

URI

https://hrcak.srce.hr/265334

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