中文摘要：

研究了铜氰溶液中总氰初始浓度、pH、铜浓度等对总氰降解效率的影响,比较了KCN溶液和铜氰溶液的总氰降解率,初步推断了铜氰溶液在辐照过程中的降解机制。实验结果表明,在同样的辐照剂量下,随着总氰初始浓度的增加,总氰降解率降低,相应的总氰降解G值增大;铜浓度越低,总氰降解率越高;pH越小的铜氰溶液总氰降解率越高。电子束辐照KCN溶液和铜氰溶液的总氰降解反应属于表观一级反应。在相同的辐照剂量下,KCN溶液的总氰降解率比铜氰溶液要高得多。铜氰溶液的电子束辐照降解过程非常复杂,主要是铜氰络合离子逐步离解出的CN-与·OH的反应。

英文摘要：

The aqueous phase experiments of cyanide degradation by electron beam were performed to determine the effects of reaction conditions,such as initial total cyanide concentration （TCN）,solution pH,and copper concentration,on the decomposition rate of copper cyanide. The irradiated copper cyanide solution samples were analyzed by the UV spectrophotomotry method. The results show that the degradation efficiency decreased,while the G value increased,with the increasing TCN concentration. The TCN degradation efficiency increased with increasing Cu concentration and/or declining solution pH. The decomposition kinetics of potassium cyanide and copper cyanide were consistent with the pseudo firs-order reaction rate model. The decomposition rate of free cyanide was faster than complex copper cyanides suggesting that free cyanide ions were first released from the complex cyanides for reaction with the radicals produced by the irradiation.