亚胺基二乙酸树脂对金属镍的静态吸附及连续逆流U形解吸系统  

Static adsorption properties of Ni(Ⅱ)by IDA resin and U-shaped continuous countercurrent desorption

作　　者：王文忠[1] 黄少斌[1] 

机构地区：[1]华南理工大学环境科学与工程学院,广东广州510006

出　　处：《化工进展》2009年第11期2040-2046,2062,共8页Chemical Industry and Engineering Progress

基　　金：广东省科技计划项目(2007B030103004)

摘　　要：研究了亚胺基二乙酸型螯合树脂R604对模拟含镍废水中镍离子静态交换吸附性能的主要影响因素,包括废水浓度、pH值、温度等,还研究了吸附平衡态、吸附过程的动力学、热力学,并给出了相应的模型,这些模型均与实验结果有很好的符合度。最后研究了独创的U形解吸柱系统对吸附饱和树脂的解吸性能,探讨了树脂停留时间、解吸液树脂流量比对解吸率和金属浓缩液浓度在柱体内分布的影响。研究表明,亚胺基二乙酸型树脂在废水金属离子镍的去除中有着高效、独特的性能,连续逆流U形解吸系统能提高重金属浓缩液浓度,并大幅度节省解吸液用量,减少解吸时间。The chelating exchange resin R604, which has iminodiacetic acid （IDA） functional ligand, was used to remove Ni2＋ from synthetic aqueous solutions. Several factors influencing the ion-exchange adsorption properties, such as the concentration of nickel, the pH value and temperature, were studied. In addition, the adsorption equilibrium, kinetics and thermodynamics were also explored, by which the corresponding models that can well describe the experimental results were obtained. At the same time, an original U-shaped continuous countercurrent desorption system was setted up for the investigation of the desorption ability of the resin that reached saturated adsorption. The influence of residence time of the resin in the column and the flow rate of desorption solution over the resin on the desorption rate of the resin and the concentration distribution of metal-bearing solution were investigated. Results demonstrated that the chelating exchange resin IDA has a high-performance in the removal of Ni2＋ in wastewater, and that U-shaped continuous countercurrent desorption system can enrich the concentration of metal-bearing solution, which can greatly save the amount of desorption solution and reduce the desorption time.

关 键 词：吸附 亚胺基二乙酸型树脂 镍 动力学 连续逆流U形解吸 

分 类 号：TQ028.3[化学工程]