中华医学超声杂志

应用化学 ›› 1993, Vol. 0 ›› Issue (2): 42-46.

• 研究论文 • 上一篇    下一篇

巯基活性碳富集剂对重金属离子的吸附特性

周延秀, 朱果逸   

  1. 中国科学院长春应用化学研究所 130022 长春
  • 收稿日期:1992-03-18 修回日期:1992-12-16 出版日期:1993-04-10 发布日期:1993-04-10

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:1992-03-18 Revised:1992-12-16 Published:1993-04-10 Online:1993-04-10

PDF

471

被引次数

6

摘要： 从热力学、动力学及XPS3个方面讨论了巯基活性碳富集剂对重金属离子的吸附机理。结果表明富集剂的吸附过程以化学吸附为主。外表面,内表面对Cu2+的吸附率分别为19%,81%;Pb2+为6%,94%,对Zn2+为17%,83%,而吸附Cd2+完全由内扩散所控制。被吸附的Cu2+还将进一步还原为Cu0。

关键词: 巯基活性碳富集剂, 重金属离子, 吸附机理

Abstract: 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 Cuo.

Key words: sulfhydryl-containing active carbon adsorbent, heavy metal ion, adsorption mechanism

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