이온치환 반응을 이용한 니켈-카드뮴 폐이차전지에서 카드뮴의분리에 대한 연구
A Study on the Separation of Cadmium from Waste Ni-Cd Secondary Batteries by Ion Substitution Reaction
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참고문헌
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초록
폐 니켈-카드뮴 전지의 재활용을 위하여 효율적으로 카드뮴과 니켈을 분리할 수 있도록 이온치환 반응을 이용하여 선택적으로카드뮴을 분리하였다. 폐 니켈-카드뮴 전지 내의 전극을 분쇄하여 얻은 전극 분말을 황산에 침출시킨 니켈-카드뮴 용액에 황화나트륨을 첨가하여 CdS로 침전시켰다. 다양한 조건에서 이온치환실험을 실시하였으며, 최적조건으로는 상온에서 용액의 pH = –0.1, Na 2 S/ Cd = 2.3일 때 용액 내 잔존하는 Cd은 약 100 ppm으로 대부분 CdS로 침전된 결과를 얻을 수 있었다.
Abstract
In order to recycle waste nickel-cadmium batteries, cadmium was selectively removed by ion substitution reaction so that cadmium and nickel could be separated efficiently. The electrode powder obtained by crushing the electrode in the waste nickelcadmium battery was leached with sulfuric acid. The cadmium in the nickel-cadmium solution was precipitated with cadmium sulfide by the addition of sodium sulfide. Ion substitution experiments were carried out under various conditions. At the optimum condition with pH = .0.1 and Na 2 S/Cd = 2.3 at room temperature, the residual Cd in the solution was about 100 ppm, and most of it was precipitated with CdS.
참고문헌 (10)
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