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지지막을 이용하는 회분 액막 추출기에 의한 수용액 중의 아연이온 분리
주창식,천재기,하홍두 한국화학공학회 2000 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.38 No.1
지지막을 이용하는 회분 액막 추출기를 사용하여 수용액 중의 아연이온을 분리하였다. 액막 추출기는 액막과 두 개의 수용액상(추출상과 회수상)으로 구성된다. 액막으로는 D₂EHPA를 케로신에 30 vol%로 희석시킨 용액을 사용하며, 두 장의 미세공을 가진 친유성 지지막에 의해 양측의 두 수용액상과 격리된다. 추출상으로는 pH를 조절한 아연 수용액을 사용하였고, 회수상으로는 황산 수용액을 사용하였다. 이 액막 추출기는 수용액 중의 아연이온을 지속적이고 효과적으로 분리하였다. 아연의 분배계수와 추출기 내에서의 아연이온 분리속도에 미치는 조작변수들의 영향을 실험적으로 조사하였으며, 이를 바탕으로 초기 분리속도와 조작변수 사이의 실험식을 얻었다. Separation of zinc ion from aqueous solutions by batch liquid membrane permeator with two micro-porous films was studied. The permeator consisted of a liquid membrane and two cells for aqueous solutions. The liquid membrane consisted of D₂EHPA(di-2-ethylhexyl-phosphoric acid), diluted to 30 vol% with kerosine and trapped between two micro-porous hydrophilic films, as the carrier. This liquid membrane separated two aqueous solutions, one of which was the extraction solution containing zinc ion and the other of which was the stripping solutions consisting of H₂SO₄solution. The permeator separated zinc ion from aqueous solutions effectively. The effect of operating parameters on the distribution coefficient of zinc ion and separation velocity of zinc ion were examined on the basis of the experimental results.
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유기추출제를 이용한 산화아연 폐기물로부터 아연의 선별 침출 및 산화아연 제조
주창식,천재기,이석희,하홍두,정갑섭,황덕기 한국환경과학회 1998 한국환경과학회지 Vol.7 No.3
An experimental research was preformed for the development of an effective process for zinc oxide waste(zinc ash) reuse. Zinc was selectively leached from zinc ash by 30 vol.% D_2EHPA in kerosine solution, and the leaching velocity was quite fast. Zinc leached was stripped by sulfuric acid solutions, and the amount of zinc stripped was linearly increased with the amount of sulfuric acid used. Zinc oxide fine particles were obtained by dropwise adding of sodium hydroxide solution to the resultant aqueous zinc solution at 85℃.
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지지막을 이용하는 액막 추출기 내에서 아연 이온의 이동
주창식,이석희,이민규,홍성수,하홍두,정석기 한국환경과학회 2000 한국환경과학회지 Vol.9 No.2
For the purpose of development of a liquid membrane permeator which separates metal ions from aqueous solutions continuously and effectively, a continuous membrane permeator with the membrane solution trapped between extraction and stripping phases by two micro-porous hydrophilic films was manufactured. Experimental researches on the separation of zinc ion from aqueous solutions were performed in the liquid membrane permeator with 30 vol % D_2EHPA solution in kerosine as liquid membrane. As results, the liquid membrane permeator separates zinc ion from aqueous solutions continuously and effectively in the wide range of operating conditions. A simple mass transfer rate model using equilibrium constant of the extraction reaction for the system used were proposed, and the model was compared with experimental results of separation of zinc ion in the permeator. And the effects of operating factors, such as space time, pH of extraction solution, extraction temperature, on the separation rate of zinc ion in the permeator were experimentally examined.
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