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혼합계면활성제 용액의 시너지효과를 이용한 이온부상법과 흡착콜로이드부상법의 분리효율 향상

Improvement of the Separation Efficiency of Ion Flotation and Adsorbing Colloid Flotation by the Synergistic Effect of Mixed Surfactant Solutions

김경화 서은진 최상준

Kim KH Seo EJ Choi SJ

HWAHAK KONGHAK, February 1999, 37(1), 115-119(5), NONE

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Abstract

수용액 중의 Cd(II) 이온을 이온부상법과 Fe(III)를 사용한 흡착콜로이드부상법을 이용하여 제거하였다. Cd(II) 이온 제거의 최적 pH는 이온부상법의 경우는 pH 6.4, 흡착콜로이드부상법의 경우에는 pH 11로 나타났다. Cd(II) 이온의 제거효율에 영향을 미치는 인자들인 부상시간, pH, 계면활성제, 외부이온, 알킬알코올의 영향에 대해 조사하였다. 거품분리를 이용한 Cd(II) 이온 제거에서 방해인자인 외부이온은 혼합계면활성제 용액의 표면활성을 이용하여 극복할 수 있다. 이 연구에서는 혼합계면환성제의 시너지효과를 이용한 거품부상법의 분리효율향상을 실험적으로 증명하였다.

Experimental investigations on the removal of Cd(II) from aqueous solution were carried out through two foam separation techniques : ion flotation and adsorbing colloid flotation with Fe(III). The optimum pH for good removal was found to be about 6.4 for the former and about 11 for the latter. The effects of flotation time, pH, surfactant(sodium lauryl sulfate), foreign ions(Na⁺, Ca²⁺, NO₃^-, SO₄^2-) on the efficiency of Cd(II) removal were discussed. The presence of foreign ions inhibit the Cd(II) removal by foam flotation. It was suggested that the limitation of foam flotation on Cd(II) removal may be overcome by the surface activity of mixed surfactant solution. The application of the synergistic effect of mixed surfactant solutions to the improvement of the removal efficiency of foam flotation was experimentally verified in this work.

Keywords

Ion Flotation Adsorbing Colloid Flotation Mixed Surfactant Synergistic Effect

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