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undergraduate thesis
Influence of magnetic stirring, temperature and citrate concentration on the precipitation of calcium oxalate dihydrate
Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2018. urn:nbn:hr:182:958007
Bilić, Katarina
Josip Juraj Strossmayer University of Osijek
Department of Chemistry
Department of Analytical, Organic and Applied Chemistry

Institutional repository: Repository of the Department of Chemistry, Osijek

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Bilić, K. (2018). Influence of magnetic stirring, temperature and citrate concentration on the precipitation of calcium oxalate dihydrate (Undergraduate thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:958007

Bilić, Katarina. "Influence of magnetic stirring, temperature and citrate concentration on the precipitation of calcium oxalate dihydrate." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2018. https://urn.nsk.hr/urn:nbn:hr:182:958007

Bilić, Katarina. "Influence of magnetic stirring, temperature and citrate concentration on the precipitation of calcium oxalate dihydrate." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2018. https://urn.nsk.hr/urn:nbn:hr:182:958007

Bilić, K. (2018). 'Influence of magnetic stirring, temperature and citrate concentration on the precipitation of calcium oxalate dihydrate', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 18 February 2025, https://urn.nsk.hr/urn:nbn:hr:182:958007

Bilić K. Influence of magnetic stirring, temperature and citrate concentration on the precipitation of calcium oxalate dihydrate [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2018 [cited 2025 February 18] Available at: https://urn.nsk.hr/urn:nbn:hr:182:958007

K. Bilić, "Influence of magnetic stirring, temperature and citrate concentration on the precipitation of calcium oxalate dihydrate", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:182:958007

Metadata
TitleInfluence of magnetic stirring, temperature and citrate concentration on the precipitation of calcium oxalate dihydrate
AuthorKatarina Bilić
MentorBerislav Marković (mentor)
MentorAnamarija Stanković (mentor)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
(Department of Analytical, Organic and Applied Chemistry)
Osijek
Defense date and country2018-09-28, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
This paper reports on the investigation of experimental conditions relevant for spontaneous precipitation of significant amount of pure calcium oxalate dihydrate (COD). For this purpose, the hydrodynamic and thermodynamic parameters, such as mode of agitation, temperature, supersaturation and concentration of additives (citrate ions), have been studied. The results show that in the model systems, without the citrate addition and applied mechanical stirring, calcium oxalate monohydrate (COM) was observed as dominant modification after 20 min of aging, while the magnetic stirring resulted in a formation of a mixture of COM and calcium oxalate trihydrate (COT), regardless of the temperature applied. In the mechanically stirred systems, the addition of citrate ions in the range of concentrations, 0.001 mol \(dm^{-3} \) < \(c_{i}\left ( Na_{3} C_{6}H_{5}O_{7}\right )\) < 0.012 mol \(dm^{-3} \) , caused the formation of COM and COD mixture at all temperatures. At the same conditions and in the magnetically stirred systems formation of COD, in a mixture with COT or COM, has been observed. The highest COD content in the mechanically stirred system was obtained at 45 °C and \(c_{i}\left ( Na_{3} C_{6}H_{5}O_{7}\right )\) = 0.001 mol \(dm^{-3} \) (w = 89.5%), while in the magnetically stirred system almost pure COD was obtained at 37 °C and \(c_{i}\left ( Na_{3} C_{6}H_{5}O_{7}\right )\) = 0.008 mol \(dm^{-3} \) (w = 96.5%).
Keywords
Languageenglish
URN:NBNurn:nbn:hr:182:958007
Study programmeTitle: Chemistry
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2018-12-14 10:33:57