Effects of compositional changes of hot spring water upon mineral precipitate. I. Changes in chemical composition and crystal growth rate of Pb-bearing barite (hokutolite) from Tamagawa Hot Spring waters.
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概要
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Changes in the chemical compositions of Tamagawa Hot Spring waters and Pb-bearing barite (hokutolite) were examined. Samples were obtained from various locations and various time in Tamagawa Hot Spring. The relationships between the hot spring waters and the minerals were expressed as partition equations and phenomenological equations; then, the partition coefficients and phenomenological coefficients were calculated. The apparent partition coefficients of Pb<SUP>2+</SUP> and of Sr<SUP>2+</SUP> between the two phases were found to have increased, from 0.14 to 0.30(0.31) and from 0.023 to 0.035(0.042) respectively, with the decrease in the hokutolite growth rate since 1973. The reaction rate of hokutolite as calculated from the phenomenological equations was, however, about 2 times higher in 1983 than in 1965. These results were ascribed to the rise in the degree of the supersaturation of barium sulfate and also to the increase in the nucleation rate in the hot spring water.
- 公益社団法人 日本化学会の論文
著者
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Watanuki Kunihiko
Department Of Chemistory The College Of Arts And Sciences The University Of Tokyo
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Watanuki Kunihiko
Department of Chemistry, The College of Arts and Sciences, The University of Tokyo
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SASAKI Nobuyuki
Department of Bioengineering, Faculty of Engineering, Yokohama National University
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- Effects of compositional changes of hot spring water upon mineral precipitate. I. Changes in chemical composition and crystal growth rate of Pb-bearing barite (hokutolite) from Tamagawa Hot Spring waters.