1990 Fiscal Year Final Research Report Summary
New Disinfection Method for Water Treatment by Using Ion-Exchangers
| Project/Area Number |
63850164
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Research Field |
無機工業化学
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| Research Institution | Yamanashi University |
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Principal Investigator |
SUZUKI Takashi Yamanashi Univ. Fac. Eng., Prof., 工学部, 教授 (60020385)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Tatsuo Showa Pharm. Col., Prof., 教授 (60077518)
GOTO Shoji Yamanashi Univ. Fac. Eng., Prof., 発酵化学研究施設, 教授 (00020339)
KINOMURA Nobukazu Yamanashi Univ. Fac. Eng., Associate. Prof., 無機合成研究施設, 助教授 (50029732)
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| Project Period (FY) |
1988 – 1990
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| Keywords | New disinfection method / Mixed-ved DISINFECTION method / Electrodialysis using ion-exchange membranes / Neutrality disturbance phenomenon / OH^- ion / H^+ ion / Synergistic effect |
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| Research Abstract |
The disinfection effects of mixed beds containing synthetic ion-exchangers in H^+ and OH^- forms and electrodialysis systems using inorganic and organic ion-exchange membranes have been probed under various conditions.
Some mixed beds of the OH^- and H^+ ion-exchangers were found to have germicidal efficiency because of the synergistic effect of basic OH^- and acidic H^+ ions on the ion-exchangers. Further, it was found that the mixed bed of a super macroreticular OH^- form anion-exchange resins with large pore diameter of about 10mum and an active alumina or a magnesium oxide with similar surface property as that of the OH^- form exchanger has superior bactericidal effect on Escherichia coli cells in water, whose diameters are about 1-2 mum.Remarkable disinfection efficiency was found in the electrodialysis system with an antimonic acid inorganic cation-exchange membrane where "neutrality disturbance phenomenon" easily occurs, i. e., water in the vicinity of the inorganic ion-exchange membrane is easily dissociated to OH^- and H^+ ions. Thus, the distinguished germicidal efficiency is considered to be due to a synergistic effect of both the active OH^- and H^+ ions produced. The electrodialysis system has the feasibility as a new and practical disinfection system for water treatment.
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