摘要
通过实验探讨了含氰废水在活性炭表面上的吸附和氧化历程，提出了以化学吸附为特征和在氰化物的氧化过程中铜化合物起催化剂作用的观点．实验研究了金属离子、溶液ｐＨ值及溶解氧对活性炭处理氰化物容量的影响，分别用热力学和动力学实验来计算吸附热和吸附活化能，从而提出吸附机理和催化氧化反应机理．结果指出，氰化物在活性炭上的催化氧化反应与活性炭的表面含氧基因、催化剂Ｃｕ２＋和吸附的溶解氧有关．这一机理对实际处理合氰电镀废水有指导意义．
The adsorption and oxidation of cyanide on activated carbon have been investigated to examine whether or not this process involves chemisorption and catalysis of copper compounds on the oxidation of cyanide. The effect of metal ions, dissolved oxygen and the pH of cyanide solution on the treatment capacity of activated carbon were tested. Thermodynamic experiments and kinetic experiments were also conducted to calculate the heat of adsorption and the activated energy of adsorption. The mechamism for the adsorption and catalytic oxidation of cyanide on activated carbon is proposed. This mechanism is characterized by the chemisorption resulting from the interaction between complex ions and the surface groups of activated carbon, and the catalytic oxidation of cyanide by adsorbed oxygen with copper compounds adsorbed on carbon surface being the catalyst.The application of the mechanism to the treatment of synthetic cyanide wastewater in a draft-tube three- phase fluidized bed reactor raised the treatment capacity of activated carbon. Applied Chemistry Dhemistry Department, Harbin Institute of Technology '65 Chemistry and Chemical Engineering Department, Southeast University
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
1994年第5期1-9,共9页
Journal of South China University of Technology(Natural Science Edition)
关键词
氰化物
活性炭
废水处理
s: Cyanide
activated carbon
adsorption
catalytic oxidation
mechanism.
