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Citation: Zhou Yanxiu, Zhu Guoyi. CHARACTERISTICS OF SULFHYDRYL-CONTAINING ADSORBENT BASED ON ACTIVE CARBON[J]. Chinese Journal of Applied Chemistry, ;1993, 10(2): 42-46. shu

CHARACTERISTICS OF SULFHYDRYL-CONTAINING ADSORBENT BASED ON ACTIVE CARBON

Zhou Yanxiu ,
Zhu Guoyi

1.
Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun

Received Date: 18 March 1992
Available Online: 16 December 1992

The absorption mechanism of a novel separation absorbent containing sulfhydryl group has been studied in terms of thermodynamics and kinetics. The results indicate that the adsorbent is able to absorb heavy metal ions:Cu²⁺,Pb²⁺,Cd²⁺, and Zn²⁺. The predominant process of the adsorption is a chemical adsorption. The amount of the adsorption on the outer and internal surface of the adsorbent is 19% and 81% for Cu²⁺;6% and 94% for Pb²⁺; 17% and 83% for Zn²⁺, respectively ; while the adsorption of Cd²⁺ is controlled only by internal diffusion. For Cd²⁺ only an outer surface adsorption was observed. The XPS results show that Cd²⁺, Pb²⁺ and Zn²⁺ are adsorbed and thus enriched by the novel separation adsorbent. The Cu²⁺ adsorbed may be then reduced to Cu⁰.
- sulfhydryl-containing active carbon adsorbent,
- heavy metal ion,
- adsorption mechanism
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