Adsorption Characteristics of Nickel and Zinc Ion on Domestic Activated Carbon

활성탄에 의한 니켈 및 아연 이온의 흡착특성

  • Chan-Kuk Kim (Department of Chemistry, Dongguk University) ;
  • Tae-Won Min (Department of Chemistry, Dongguk University)
  • 김찬국 (동국대학교 이과대학 화학과) ;
  • 민태원 (동국대학교 문리과학대학 화학과)
  • Published : 1984.04.20

Abstract

The adsorption characteristics of heavy metal ions $(Ni^{2+}$, $Zn^{2+}$) on domestic activated carbon which manufactured from the wood, waste rubber and coal has been studied. The following conclusions were obtained by investigating the effect of pH, halides, cyanide and temperature on the absorption of heavy metal ions and by determining absorption rate and absorption isotherms. When heavy metal ions were adsorbed on activated carbon in the pH range from 6 to 7, treated heavy metal ions were almost come to the equilibrium and recovered in the form of complex anions such as $MX_4^{2- }$and $M(CN)_4^{2-}$ in an hour. The absorption isotherms of heavy matel ions were well fitted in Freundlich's equation. Heavy metal complex anions on activated carbon were easily eluted by using 0.1N HCl solution. These results suggest that the complex anions have unexpectedly strong affinity for the surface of activated carbon.

원료가 서로 다른 세종류의 국산활성탄을 사용하여 니켈 및 아연이온에 관한 할로겐과 시안이온의 활성탄 흡착에 대한 공존효과를 살펴보았다. 수용액중에서 니켈 및 아연이온은 할로겐이나 시안이온의 공존으로 착음이온 형태로 활성탄에 용이하게 흡착됨을 알 수 있었으며 니켈이온은 pH $6.0{\sim}7.0$에서, 아연이온은 pH $6.5{\sim}7.0$의 범위가 가장 적합함을 알았다. 또한 니켈이온과의 착음이온을 만들기 위한 음이온은$ 1{\times}10^{-2}mol/l$에서 그 최대치를 나타내었다. 실온에서 구한 이들의 흡착등온선은 거의 직선으로 Freundlich의 흡착등온식게 따랐으며, 시안이온 공존시의 기울기는 활성탄 A, B, C에 대해 각각 1.7, 5.4, 7.1로서 활성탄 A가 흡착제로서 매우 양호한 것을 알 수 있다.

Keywords

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