Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, Egypt.
Sci Rep. 2023 Feb 24;13(1):3248. doi: 10.1038/s41598-023-29956-4.
The present study is concerned with the development of a new cylindrical basket filled with ion exchange resin. The performance of the reactor was examined by removing Cu, Fe and SO ions from synthetic wastewater. Variables studied were the initial ion concentration in the solution, contact time, resin height inside the cylindrical basket and cylindrical basket rotational speed. Dimensionless analysis was used to obtain a mass transfer correlation for each of the mentioned ions suitable for scale up and design of the present reactor. The experimental results revealed that both the percentage and the rate of removal of (Cu, Fe and SO) ions decrease as the initial ion concentration in the solution increases, while they increase as the contact time, rotational speed and (L/d) ratio increase. Both Langmuir's and Freundlich's adsorption isotherms were examined and it was found that Langmuir's adsorption isotherm gives a better fitting for the obtained data than Freundlich's. Regeneration ability was tested, which revealed the high resin efficiency upon operating several consequence cycles that could reach 4 cycles with a slight decrease in the removal efficiency.
本研究关注的是一种新型的填充离子交换树脂的圆柱形篮子的开发。通过从合成废水中去除 Cu、Fe 和 SO 离子来检查反应器的性能。研究的变量包括溶液中的初始离子浓度、接触时间、圆柱形篮子内的树脂高度和圆柱形篮子的转速。通过无量纲分析，获得了适用于本反应器放大和设计的每个离子的传质关联式。实验结果表明，随着溶液中初始离子浓度的增加，(Cu、Fe 和 SO)离子的去除率和去除率均降低，而随着接触时间、转速和(L/d)比值的增加而增加。考察了 Langmuir 和 Freundlich 吸附等温线，发现 Langmuir 吸附等温线比 Freundlich 吸附等温线更能很好地拟合实验数据。对再生能力进行了测试，结果表明，在操作几个连续周期后，树脂的效率很高，去除效率仅略有下降，可达 4 个周期。
