研究了磁性淀粉微球对Ni(Ⅱ)的吸附性能.考查了在常温条件下,反应时间、Ni(Ⅱ)的初始浓度、磁性淀粉微球的用量等对吸附性能的影响.探讨了磁性淀粉微球对Ni(Ⅱ)的吸附热力学和吸附动力学行为.结果表明:Ni(Ⅱ)为80mg/L,磁性淀粉微球用量为30mg时,在常温下经过80min的振荡吸附,磁性淀粉微球对Ni(Ⅱ)饱和吸附量达到11.69mg/g;吸附热力学表明磁性淀粉微球对Ni(Ⅱ)的吸附行为符合Freundlich方程;磁性淀粉微球对Ni(Ⅱ)离子的吸附过程可用准一级和准二级动力学模型进行模拟,但更符合二级动力学方程.
The adsorption of magnetic starch microspheres on Ni(Ⅱ) was studied,effect of different reaction time,the initial concentration of Ni (Ⅱ) , the amount of magnetic starch microspheres on adsorption were re-searched, and the adsorption kinetics and thermodynamic behavior was explored. The results showed that the proper conditions of magnetic starch microspheres on Ni(Ⅱ)were as follows:the adsorption time was 80min,the dosage of magnetic starch microsphere was 30mg,the concentration of Ni(Ⅱ) was 80mg/L. The adsorption be-havior of magnetic starch microsphere on Ni(Ⅱ) can be adapted to Freundlich adsorption isotherm equation very well. Study of adsorption kinetics have been shown that adsorption of magnetic starch microspheres on Ni (Ⅱ) can be simulated by pseudo-first order and pseudo-second order kinetic models,but the latter equation being the better.
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