Crystallization Kinetics of CaOx in Artificial Urine and in Saline System

Lan Qing Deng; Jun Fa Xue; Li Kuan; Jian Ming Ouyang

doi:10.4028/www.scientific.net/AMR.881-883.708

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Crystallization Kinetics of CaOx in Artificial Urine and in Saline System

Abstract:

The crystallization kinetics of calcium oxalate (CaOx) was comparatively studied by detecting the change of free Ca²⁺ ions concentration with the reaction time in artificial urine and in saline system. The dynamics equations of CaOx crystallization was r=kc^α, and the average reaction order (α) was 3.3 regardless of the relative suprasaturation degree (RS) of CaOx in the range of RS=10.58~17.53. The average reaction rate constant (κ) was (0.97±0.1)×10⁹ in artificial urine and κ=(3.1±1.8)×10⁹in saline system, due to the presence of inhibitors to CaOx crystallization in artificial urine.