압착성형법으로 제작된 전기화학적 이온교환 전극에서 구리이온의 흡착과 용출특성

박세용; 김래현; 조영일

Journal of the Korean Industrial and Engineering Chemistry, Vol.9, No.4, 574-578, August, 1998

The Adsorption and Elution Characteristics of Copper Ions in Electrochemical Ion Exchange Electrode Fabricated by the Compressed Diecasting

박세용, 김래현, 조영일

초록

전기화학적 이온교환전극을 양이온 교환수지 Amberlite IRP-64와 결합제로서 Stylen-Buthylene-Rubber (SBR)를 혼합하여 압축성형 방법으로 제작하여, 전극전위와 전해질의 pH에 따른 구리이온의 흡착과 용출특성을 고찰하였다. 흡착공정에서는 -1800 mV에서 최대 흡착속도를 나타내었으며 90분 경과 후,92%의 흡착율을 나타내었다. 용출공정의 경우, 본 실험영역에서는 전위의 증가에 비례하여 용출율은 증가되어 나타났으며, 3600mV에서 50분 이후 88%의 용출율을 나타내었다. 전기화학적 이온교환 전극 근처의 국부적인 pH 변화는 흡착과 용출공정에 크게 영향을 미치는 것으로 사료되며, 전해질의 pH가 각각 염기성과 산성에서 높은 흡착율과 용출율을 나타내었다.

Electrochemical Ion Exchang(EIX) electrode containing Amberlite IRP-64 as a cation ion exchang resin and Stylene-Buthlene-Rubber(SBR) as a binder was fabricated by the compressed diecasting method. The adsorption and elution characteristics in copper sulfate solution were investigated at the various electrode potentials and electrolyte pHs. In the adsorption process, it was found that the maximum adsorption rate of copper was obtained at -1800 mV and the ratio of adsorption was 92% during 90 min. In the elution process, the elution rate of copper was increased in proportion to anodic potential in the present experimental range and the ratio of elution was 88% during 50 mins at 3600 mV. The adsorption and elution processes were significantly affected by the variation of local pH in the vicinity of electrochemical ion exchange electrode. The higher performances of adsorption and elution were elution were obtained at basic and acidic eletrolytes.

Keywords:Electrochemical Ion Exchange;Adsorption;Elution Process

[References]

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[1] Helfferich F, "Ion Exchange," 91, McGraw-Hill Co., New York (1962)

[2] Bridger NJ, Jones CP, Necille MD, J. Chem. Technol. Biotechnol., 50, 469 (1991)

[3] Turner AD, Dozoil JF, Gerontopoulos P, "Electrochemical and Ion-Exchange Processes. Radioactive Waste Management and Disposal," 53, Ed. R. Simon. Cambridge University Press (1986)

[4] Turner AD, Junkinson AR, Bridger NJ, Electrical International Symposium on Management of Low Intermedinate Level Radioactive Wastes, Stockholm, May (1988)

[5] Wu WS, Uddin MS, Hidajat K, Proceeding of APCChE and Chemeca 93, 1, 335-1 (1993)

[6] 이원식, 김래현, 정택상, 오세중, 한국공업화학회지, 6(4), 519 (1995)

[7] Bridger et al., "Electrodes," U.S. Patent, 5,217,587 (1991)

[8] Bridger et al., "Separation Methods," U.S. Patent, 5,225,056 (1991)

[9] Clearfield A, Stynes JA, J. Inorg. Nucl. Chem., 26, 117 (1964)

[10] Alberti G, Torracca E, J. Inorg. Nucl. Chem., 30, 317 (1968)

[11] Christopher J, Process for Removing Radioactive Burden from Spent Nuclear Reactor Decontamination Solutions Using Electrochemical Ion Exchange, 5, 78, 842 (1992)

[12] Evans S, Hamilton WS, Lewis JE, J. Electrochem. Technol., 6, 153 (1968)

[13] Evans S, Hamilton WS, J. Electrochem. Soc., 113, 309 (1969)