Search / Korean Journal of Chemical Engineering
HWAHAK KONGHAK,
Vol.36, No.6, 903-907, 1998
구리, 니켈의 흡착에 대한 활성탄소섬유 표면 처리의 영향
Effect of Surface Modification of Activated Carbon Fiber for Adsorption on Copper and Nickel Ions
비표면적이 각기 다른 활성탄소섬유를 산, 염기로 표면 처리하여 구리(Ⅱ), 니켈(Ⅱ)에 대한 흡착량의 변화와 표면 관능기의 영향을 조사하였다. NaOH로 처리한 섬유보다 HNO 3와 HCl로 처리한 섬유의 비표면적이 33%까지 크게 감소하였다. 적정법에 의한 결과, HNO3로 처리한 활성탄소섬유의 표면에 많은 관능기가 도입됨을 알 수 있었다. 구리 (Ⅱ), 니켈(Ⅱ)에 대한 흡착량은 Al5의 경우 표면에 존재하는 관능기의 영향을 받았으며, A20의 경우는 표면 관능기보다 비표면적의 영향이 더 큰 것으로 나타났다.
After modifying ACFs with oxidizing reagent, the adsorption characteristics of Cu(Ⅱ) and Ni(Ⅱ) ions are investigated into the amount adsorbed and the change of surface functional group. In comparison with ACF treated with NaOH, the specific surface area of ACF modified by HNO3 and HCl is decreased to 33%. The results of titration method show that, in case of being modified by nitric acid, more surface groups were introduced to ACF. The amount of Cu(Ⅱ) and Ni(Ⅱ) adsorbed on Al5 was mainly influenced by the surface functional groups, while the surface area of A20 is more important factor for metal removals.
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