Adsorption-desorption mediated separation of low concentrated D2O from water with hydrophobic activated carbon fiber.
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| Title: | Adsorption-desorption mediated separation of low concentrated D2O from water with hydrophobic activated carbon fiber. |
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| Authors: | Ono, Yuji1, Futamura, Ryusuke2, Hattori, Yoshiyuki3, Sakai, Toshio1, Kaneko, Katsumi2 kkaneko@shinshu-u.ac.jp |
| Source: | Journal of Colloid & Interface Science. Dec2017, Vol. 508, p14-17. 4p. |
| Subjects: | Activated carbon, Carbon fibers, Adsorption (Chemistry), Isotopes, Deuterium |
| Abstract: | The adsorption and desorption of D 2 O on hydrophobic activated carbon fiber (ACF) occurs at a smaller pressure than the adsorption and desorption of H 2 O. The behavior of the critical desorption pressure difference between D 2 O and H 2 O in the pressure range of 1.25–1.80 kPa is applied to separate low concentrated D 2 O from water using the hydrophobic ACF, because the desorption branches of D 2 O and H 2 O drop almost vertically. The deuterium concentration of all desorbed water in the above pressure range is lower than that of water without adsorption-treatment on ACF. The single adsorption-desorption procedure on ACF at 1.66 kPa corresponding to the maximum difference of adsorption amount between D 2 O and H 2 O reduced the deuterium concentration of desorbed water to 130.6 ppm from 143.0 ppm. Thus, the adsorption–desorption procedure of water on ACF is a promising separation and concentration method of low concentrated D 2 O from water. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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