카르복실 이온교환수지의 암모니아 흡착에 대한 전위차 적정곡선

김태일; 손원근

Journal of the Korean Industrial and Engineering Chemistry, Vol.10, No.7, 969-973, November, 1999

Export Citation

카르복실 이온교환수지의 암모니아 흡착에 대한 전위차 적정곡선

The Potentiometric Titration Curves on Ammonia Absorption of Carboxylic Ion Exchanger

김태일, 손원근

초록

본 연구에서는 카르복실산 약산성 양이온교환수지인 Fiban K-4를 이용하여 NH₄OH 용액에서의 가수분해 정도와 전위차 적정곡선에 의한 암모니아 흡착 특성을 알아보았다. 여러가지 농도의 지지전해질 (NH₄)₂SO₄에서 NH₄OH의 농도에 따른 pH 값은 실험 값과 이론 값이 잘 일치되었다. 암모니아의 평행 흡착곡선으로부터 pH에 따른 이온교환수지의 NH₃ 흡착량을 계산할 수 있었다. 또한 지지전해질의 농도가 낮아지거나 pH가 감소함에 따라 가수분해 정도가 증가하는 것을 알 수 있으며, 전해질의 농도가 감소함에 따라 0.01M 이하의 모노 이온형태를 갖기 위해서는 pH값을 증가시켜야 하는 것을 알 수 있었다. 그러므로 이들의 결과로부터 전해질의 농도와 pH의 값이 결정된다.

In this work, we studied the degree of hydrolysis of ion exchanger in NH₄OH solution and sorption characteristics of NH₃ by potentiometric titration curves with using carboxylic acid ion exchanger Fiban K-4. We knew that the theoretical pH values agreed with the experimental pH values on the NH₄OH concentrations in various concentrations of supporting electrolyte (NH₄)₂SO₄. The sorption values of NH₃using the ion exchanger can be calculated from equivalent sorption curves for various pH. Also, the degree of hydrolysis increased with decreasing concentration of supporting electrolyte and pH. In order to obtain the mono ion form below 0.01 M as the decreasing concentration of supporting electrolyre, the pH values should be increased. From these results, therefore, the concentrations of supporting electrolyte and pH values were determined.

Keywords:ion exchanger;carboxylic ion exchanger;potentiometric titration;equilibrium constant;adsorption ammonia

[References]

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[1] Kaneko K, Ozeki S, Inouye K, Nippon Kagaku Kaishi, 1351 (1985)

[2] Goupil JM, Hemidy JF, Cornet D, Zeolites, 2, 47 (1982)

[3] Toshima N, Asanuma H, Yamaguchi K, Hirai H, Bull. Chem. Soc. Jpn., 62, 563 (1989)

[4] Tuenter G, van Leeuwen WF, Leo JM, Ind. Eng. Chem. Prod. Res. Dev., 25, 633 (1986)

[5] Yoshkado S, Solid State Ion., 9-10, 1305 (1983)

[6] Yoshkado S, Solid State Ion., 40-41, 142 (1992)

[7] Hori T, Saito K, Frusaki S, Sugo T, Okamoto J, Chem. Soc. Jpn., 12, 1792 (1986)

[8] Tsuneda S, Saito K, Furusaki S, J. Membr. Sci., 58, 221 (1991)

[9] Okamoto J, Sugo T, Katakai A, Omichi H, J. Appl. Polym. Sci., 30, 2967 (1985)

[10] Gustafson L, Fillius HF, Kunin R, Ind. Eng. Chem. Fundam., 9, 221 (1970)

[11] Kunin R, Fisher S, J. Phys. Chem., 66, 2275 (1962)

[12] Soldatov VS, J. Phys. Chem. USSR, 1(42), 2287 (1968)

[13] Soldatov VS, Nauka Tech. Minsk, 162 (1972)

[14] Kim TI, Hwang TS, Son WK, Choi DM, Oh IS, Soldatov BC, Polym.(Korea), 23(5), 747 (1999)

[15] Soldatov VS, Dokl. Akad. Nauk USSR, 314(N3), 664 (1990)

[16] Soldatov VS, React. Polym., 19, 105 (1993)

[17] Soldatov VS, Ind. Eng. Chem. Res., 34(8), 2605 (1995)