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전해추출에 의한 구리 함유 폐수 처리
Treatment of Wastewater Containing Copper by Electro-Extraction
HWAHAK KONGHAK, December 1997, 35(6), 870-876(7), NONE
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Abstract
합성폐수로부터 구리의 전해추출에 대한 연구를 수행하였다. 그리고 무전해 도금법을 이용하여 다공성 니켈 전극을 제조하여 음극으로 사용하였다. 전해추출을 이용하여 폐수 중 99% 이상의 구리를 추출할 수 있었으며, 수리학적 체류시간이 감소할수록, 전(全)전류가 증가할수록 구리의 추출률은 증가하였으며, 극간거리 변화는 추출률에 큰 영향을 미치지 않았다. 또한 수리학적 체류시간과 전전류가 감소할수록 전류효율은 증가하였으며, 극간거리는 전류효율에 큰 영향을 주지않았다. 그리고 전해추출 반응기의 scale-up에 필요한 인자들의 관계는 Sh=1.24Re0.12Sc1/3(DC/A/L)-0.87(DW/C/L)-0.42로 나타낼 수 있었다.
A study on the electro-extraction of copper from synthetic wastewater has been performed. And foam-type nickel electrode was fabricated using electroless-deposite as cathode. Copper was removed from synthetic wastewater at 99% by electro-extraction. Extraction percentage of copper was increased as hydraulic retention time(HRT) decreased and apparent current increased, but it was not affected as distance between cathode and anode increased. Cathode current efficiency was increased as HRT and apparent current decresed, but it was not varied as distance between cathode and anode increased. Design factors required for scale-up of reactor can be correlated by the equation:Sh=1.24Re0.12Sc1/3(DC/A/L)-0.87(DW/C/L)-0.42
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References
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Hinatsu JT, Foulkes FR, Can. J. Chem. Eng., 69, 571 (1991)
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Walch FC, Reade GW, "Environmental Oriented Electrochemistry," C.A.C. Sequeira, Elsevier, Amsterdam, 5 (1994)
Licsko I, Takacs I, Water Sci. Technol., 18, 19 (1986)
Fleet B, Collection Czechoslovak Chem. Commun., 53, 1107 (1988)
Tanimure Y, Itoh T, Kato M, Mikami Y, Denki Kagaku, 63, 739 (1995)
Yeh RS, Wang YY, Wan CC, Water Res., 29(2), 597 (1995)
Kim M, Kwon SC, J. Metal Finishing, 19(3), 161 (1986)
"Encyclopedia of Electrochemistry of the Elements," Chap. III & IV, Bard, A.J. ed., Marcel Dekker, N.Y. (1975)
Walsh FC, Reade GW, "Environmental Oriented Electrochemistry," Ed. C.A.C. Sequeira, ELSEVIER SCIENCE, Amsterdam, 5 (1994)
Hinatsu JT, Foulkes FR, "Environmental Oriented Electrochemistry," Ed. C.A.C. Sequeira, ELSEVIER SCIENCE, Amsterdam, 136(1), 125 (1989)
Bard AJ, Faulkner LR, "Electrochemical Method," John Wiley and Sons, New York, 218 (1980)
