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수용액중의 Cr(VI) 이온 제거에서의 침전부상법과 흡착콜로이드부상법의 비교

Comparison of the Precipitate Flotation and the Adsorbing Colloid Flotation on the Removal of Cr(VI) from Aqueous Solution

강성길 최상준

Kang SG Choi SJ

HWAHAK KONGHAK, June 1994, 32(3), 483-488(6), NONE

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Abstract

수용액중의 Cr(VI)이온제거를 음이온 계면활성제 sodium lauryl sulfate 를 사용하여 거품분리기술(침전부상법, 흡착콜로이드부상법)을 이용하여 행하였다. Cr(VI)이온제거의 최적 pH는 침전부상법은 pH 8.0 근처에서 흡착콜로이드부상법은 Fe(OH)₃를 사용하는 경우 pH 4.0 근처에서 나타났다. Cr(VI) 이온 제거효율에 영향을 미치는 인자들인 계면활성제, Fe(III)이온, 외부 이온 등의 영향에 대해 조사하였다. 수용액중의 Cr(VI) 이온 제거에 있어서 침전부상법과 흡착부상법의 흡착기구 및 분리 메카니즘을 비교하여 관찰하였다.

Experimental investigations on the removal of Cr(VI) from aqueous solution were carried out by the foam separation techniques (precipitate and adsorbing colloid flotation) using sodium lauryl sulfate as a collector. The optimum pH for the removal of Cr(VI) was found to be about 8 for precipitate flotation and about 4 for adsorbing colloid flotation with Fe(OH)₃. The effect of surfactant and foreign ions(Na+, Ca²⁺, NO_3-, SO₄^2-) addition on the removal efficiency were observed. The adsorption and separation mechanism on the removal of Cu(II) ion by the foam separation techniques of precipitate and adsorbing colloid flotation were also observed.

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