Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, Shanxi Province Key Laboratory of Functional Nanocomposites, School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, PR China.
Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
Carbohydr Polym. 2019 Jun 1;213:39-49. doi: 10.1016/j.carbpol.2019.02.067. Epub 2019 Feb 22.
The aim of this study is to explore facile and large-scale method for the preparation of magnetic adsorbent materials with high-efficient heavy metal removal performance. Here, based on the process intensification of high-gravity technology, the carboxymethyl cellulose-immobilized FeO nanoparticles (CMC-FeO) were continuously synthesized via impinging stream-rotating packed bed. With a theoretical production rate of 2.35 kg h, the as-prepared CMC-FeO exhibited better adsorption capacity and faster rate for Pb(II) than those of pure FeO, and the maximum adsorption capacity of Pb(II) reached up to 152.0 mg g. It was found that the adsorption data of Pb(II) onto CMC-FeO fit well to pseudo-second order kinetic model and Langmuir isotherm model. Moreover, the as-prepared adsorbent exhibited good reusability after five adsorption-desorption cycles. Overall, the high-gravity technology can be employed for the preparation of high-performance nano-adsorbent and has a great potential in the application of heavy metal removal.
本研究旨在探索一种简便、大规模的方法，用于制备具有高效重金属去除性能的磁性吸附材料。在此，基于超重力技术的强化过程，通过冲击流-旋转填充床连续合成了羧甲基纤维素固载的 FeO 纳米颗粒（CMC-FeO）。以 2.35kg h 的理论产率，所制备的 CMC-FeO 对 Pb(II)的吸附容量和吸附速率均优于纯 FeO，最大吸附容量达到 152.0mg g。研究发现，Pb(II)在 CMC-FeO 上的吸附数据符合准二级动力学模型和 Langmuir 等温模型。此外，经过五次吸附-解吸循环后，所制备的吸附剂表现出良好的可重复使用性。总体而言，超重力技术可用于制备高性能纳米吸附剂，在重金属去除应用中具有很大的潜力。
