期刊
JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
卷 71, 期 8-9, 页码 957-967出版社
SERBIAN CHEMICAL SOC
DOI: 10.2298/JSC0609957M
关键词
zinc; adsorption; granular activated carbon; natural zeolite; equilibrium; kinetic modeling; homogeneous solid diffusion model
The isotherms and kinetics of zinc adsorption from aqueous solution onto g-ranular activated carbon (GAC) and natural zeolite were studied using an agitated batch adsorber. The maximum adsorption capacities of GAC and natural zeolite towards zinc(II) from Langmuir adsorption isotherms were determined Using experimental adsorption equilibrium data. The homogeneous solid diffusion model (HSD-model) combined with external mass transfer resistance was applied to fit the experimental kinetic data. The kinetics simulation Study was performed using a computer program based on the proposed mathematical model and developed using gPROMS. As the two-mass transfer resistance approach was applied, two model parameters were fitted during the simulation study External mass transfer and solid phase diffusion coefficients were obtained to predict the kinetic curves for varying initial Zn(II) concentration at constant agitation speed and constant adsorbent mass. For any particular Zn(II) - adsorbent system, k(f) was constant, except for the lowest initial concentration, while D-s was found to increase with increasing initial Zn(II) concentration.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据