Chen J Paul, Wang Lin
Department of Chemical and Environmental Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore.
Chemosphere. 2004 Jan;54(3):397-404. doi: 10.1016/S0045-6535(03)00714-8.
Copper adsorption kinetic properties in batch and fixed-bed reactors were studied in this paper. The isothermal adsorption experiments showed that the copper adsorption capacity of a granular activated carbon (Filtrasorb 200) increased when ionic strength was higher. The presence of EDTA diminished the adsorption. An intraparticle diffusion model and a fixed-bed model were successfully used to describe the batch kinetic and fixed-bed operation behaviors. The kinetics became faster when the solution pH was not controlled, implying that the surface precipitation caused some metal uptake. The external mass transfer coefficient, the diffusivity and the dispersion coefficient were obtained from the modeling. It was found that both external mass transfer and dispersion coefficients increased when the flow rate was higher. Finally effects of kinetic parameters on simulation of fixed-bed operation were conducted.
本文研究了间歇式和固定床反应器中铜的吸附动力学特性。等温吸附实验表明，当离子强度较高时，颗粒活性炭（Filtrasorb 200）对铜的吸附容量增加。EDTA的存在会降低吸附效果。采用颗粒内扩散模型和固定床模型成功地描述了间歇动力学和固定床运行行为。当溶液pH值未受控制时，动力学变得更快，这意味着表面沉淀导致了一些金属的摄取。通过建模获得了外部传质系数、扩散系数和弥散系数。结果发现，当流速较高时，外部传质系数和弥散系数均会增加。最后研究了动力学参数对固定床运行模拟的影响。
