연수화 과정에서 칼슘 이온의 거동에 대한 온도의 영향

• Published in: 한국수처리학회지, 19(6) pp. 31 - 40
• Main Authors: 김희진, 김동수
• Format: Journal Article
• Language: Korean
• Published: 한국수처리학회 30.12.2011
• Subjects: 토목공학
• ISSN: 1225-7192; 2289-0076

Calcium is one of the essential mineral elements in oceanic, fresh, and even drinking water. This study represented the changing patterns of the stable region of calcium ion in an aqueous system using pH-potential diagrams over temperature ranged from 15℃ to 105℃. Calcium species are categorized into two groups under the exclusion of the effects of other ions from the calcium-water system: Ca-Ca^(2+)-Ca(OH)_2 and CaH_2-Ca^(2+)-Ca(OH)_2 system. In both systems, it indicated that while the region of calcium hydroxide predominantly expands as temperature rises, the stable regions of Ca_(s) and CaH_(2(s)) shrink. On the whole, there was a decline in the stable region of calcium ion at high temperature in terms of the absolute value of potential changed. Along with this results, carbonate system would be considered to understand substantial behaviour of calcium ion in natural water, interconnecting with the effects from atmospheric CO_2, biological activities of calcareous marine organisms, and carbonate-solid system. Calcium is one of the essential mineral elements in oceanic, fresh, and even drinking water. This study represented the changing patterns of the stable region of calcium ion in an aqueous system using pH-potential diagrams over temperature ranged from 15℃ to 105℃. Calcium species are categorized into two groups under the exclusion of the effects of other ions from the calcium-water system: Ca-Ca^(2+)-Ca(OH)_2 and CaH_2-Ca^(2+)-Ca(OH)_2 system. In both systems, it indicated that while the region of calcium hydroxide predominantly expands as temperature rises, the stable regions of Ca_(s) and CaH_(2(s)) shrink. On the whole, there was a decline in the stable region of calcium ion at high temperature in terms of the absolute value of potential changed. Along with this results, carbonate system would be considered to understand substantial behaviour of calcium ion in natural water, interconnecting with the effects from atmospheric CO_2, biological activities of calcareous marine organisms, and carbonate-solid system. KCI Citation Count: 0