【摘要】 利用大块液膜体系初步研究了杯芳烃类载体对Cr(Ⅲ)的液膜传递机理.采用单因素实验,考查了载体浓度、源相Cr(Ⅲ)浓度、pH值、氧化反应条件等因素对液膜传递的影响.研究表明杯[4]乙酸衍生物在氧化促进和pH梯度条件下可以较好地进行Cr(Ⅲ)的识别传递,提出了对叔丁基杯[4]芳烃乙酸衍生物对Cr(Ⅲ)的氧化促进同向传递机理,传递过程通过化学反应、配合过程和扩散过程的结合实现,外相和内相的△pH是主要的传质推动力,内相双氧水的引入可以明显地改善传递过程.更多还原

【Abstract】 The transport mechanism of Cr(Ⅲ)by bulk liquid membrane using calixarene derivative as carrier was studied.The influnces of carrier concentration,initial Cr(Ⅲ)concentration,pH,oxidation reaction condition on transport had been examined.In conditions of oxidation and pH gradient,Cr(Ⅲ)can be identified and transported by calix[4]arene acetic acid derivative.The study brings forward oxidation-facilitated co-transfer mechanism of Cr(Ⅲ)by calix[4]arene acetic acid derivative.The whole transport includes chemical reactions and process of match and diffusion.Main driving force for transport is pH gradient between outer phase and innerphase.Transport can be improved apparently as H2O2in inner phase.更多还原