Behavior of Impurities during the Formation of an Ice Sphere

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Yoji Taguchi¹  Akira Ohkawa¹  Jun Guo¹  Togo Yamaguchi¹ 

[1] Department of Chemistry and Chemical Engineering, Faculty of Engineering, Niigata University

关键词: Impurities;    Phosphate and Ammonium Ions;    Ice Spheres;    Adsorption;    Crystallization;   

DOI  :  10.1252/jcej.35.1151

来源: Maruzen Company Ltd

【 摘 要 】

References(12)The distribution of impurities in an ice sphere was examined by melting an ice sphere formed from a solution containing phosphate and ammonium ions as impurities. To interpret this biased distribution, the adsorption phenomena of phosphate and ammonium ions on the surface of ice crystals were also experimentally examined. The adsorption experiments were performed by forming ice into spherical shapes and immersing the spheres in a solution containing phosphate and ammonium ions under a limited range of solution temperatures from 0 to 0.4°C. The results showed that the phosphate and ammonium ions were adsorbed on the ice surface immediately after the immersion. The amounts adsorbed after the establishment of a quasi-equilibrium state obeyed a Langmuir adsorption isotherm. Based on the adsorption isotherm, we proposed a quantitative explanation for the distributed ions in the ice sphere.

【 授权许可】

Unknown