铜、锌氰配合物在离子交换纤维上的扩散、吸附机理  

Diffusion and adsorption mechanism of copper and zinc cyanide complexes on ion exchange fiber

作　　者：党晓娥[1] 淮敏超[1] 兰新哲[1] 

机构地区：[1]西安建筑科技大学陕西省冶金工程技术中心,西安710055

出　　处：《环境工程学报》2012年第9期3148-3152,共5页Chinese Journal of Environmental Engineering

基　　金：陕西省教育厅科研计划项目(2010JK644)

摘　　要：运用Boyd液膜扩散公式和范山鹰等提出的扩散模型,考察了碱性溶液中铜、锌氰配合物在离子交换纤维上的扩散行为;通过分析吸附前后纤维上官能团的位置变化以及解吸前后纤维上元素含量的变化,研究铜、锌氰配合物在纤维上的吸附机理。实验结果表明,离子交换纤维对铜、锌配合物的吸附在反应初期,以液膜扩散为主控制步骤,反应后期,以空隙扩散为主控制步骤。并运用离子交换纤维在水溶液中具有类似胶体型物质的双电层结构解释了不同控制阶段吸附速率不同的原因,虽然各阶段吸附速率有所不同,但纤维对铜、锌氰配合物的吸附均为离子交换机制。The diffusion behavior of copper and zinc cyanide complexes in alkaline solution on ion exchange fiber （IEF） was studied applying Boyd film diffusion equations and Fan Shan yang＇ s diffusion models. Adsorption mechanism of copper and zinc cyanide complexes was studied by analyzing the changes of the functional group position and the element content on IEF before and after desorption. The results showed that the adsorption process of copper and zinc complexes by IEF was controlled by the main film diffusion at the initial stages of reaction and by diffusion gap at the late stages of reaction. And the reasons for different adsorption rates at different stages are explained by using IEF in the aqueous colloidal substances with similar double-layer structure. In the adsorption process, though the adsorption rate at different stages changes, the fiber adsorption for copper and zinc cyanide complexes coincides with ion exchange adsorption mechanism.

关 键 词：离子交换纤维 铜、锌氰配合物 扩散行为 吸附机理 离子交换 

分 类 号：TB34[一般工业技术—材料科学与工程] X758[环境科学与工程—环境工程]