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음이온 계면활성 물질에 의한 구리의 흡착분리에 관한 연구
A Study on the Adsorptive Separation of Copper by an Anion Surfactant
HWAHAK KONGHAK, June 1997, 35(3), 367-373(7), NONE
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Abstract
음이온 계면활성 물질로서 sodium dioctylsulfosuccinate(SDSS라 약함)와 구리의 기포-포말 흡착분리 특성을 고찰하였다. 이상용액과 단분자 흡착의 가정하에 Gibbs 식에 의한 정적방법으로 SDSS 수용액의 표면과잉농도를 구하고 흡착모델을 고찰하였으며, 회분식 흡착실험으로 SDSS의 기액계면 흡착열을 구하였다. 또한 SDSS와 구리의 제거속도 및 포집효율(분리인자)등을 검토하였으며, 구리 및 그 수산화물의 용해도적과 평형상수를 이용하여 수용액 중의 화학종의 분리가능한 pH한계를 구하였다. 흡착모델은 3⁓107 ㏖/ℓ 이하의 희박농도에서는 Langmuir 흡착식을 따르지만 그 이상의 농도에서는 Freundlich식으로 나타낼 수 있었다. SDSS의 기액계면 흡착열은 1.92 ㎉/㏖로 얻어졌고, SDSS에 의한 구리의 효과적인 분리 pH범위는 5∼6이었으며, 분리효율은 3ℓ/min 이하의 범위에서 공기유량에 비례하였다.
To investigate the characteristics of the adsorptive separation of copper by an anion surfactant, sodium dioctylsulfosuccinate(SDSS), the surface excess concentration of SDSS was determined by the static method, and the adsorption heat of SDSS at the gas-liquid interface was also determined under the assumption of ideal solution and monolayer adsorption. The removal rate and the collection efficiency of SDSS and copper were determined, and the effect of pH was discussed from the solubility products and equilibrium constants of copper and its hydroxides. The Langmuir adsorption equation was adequate at very low concentration below 3×10-7mol/l of SDSS, but above this concentration the Freundlich equation worked well. Copper was effectively separated at pH5-6.
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References
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Kubota K, Hayashi S, Kag. Kog. Ronbunshu, 8, 677 (1982)
French RM, Wilson DJ, Sep. Sci. Technol., 15, 1213 (1980)
Lemlich R, "Adsorptive Bubble Separation Techniques," Academic Press, 252 (1972)
Adamson AW, "Physical Chemistry of Surface," 4th ed., John Wiley, 70 (1982)
Ruthven DM, "Principles of Adsorption and Adsorption Process," John Wiley, 49 (1984)
Suzuki M, "Adsorption Engineering," Elsevier, 37 (1990)
Stumn W, Morgan JJ, "Aquatic Chemistry," 2nd ed., John Wiley, 242 (1981)
