The Adsorption of CTC onto CFBs: A Study on Fabrication of Magnetic Cellulose/Fe3O4 Beads (CFBs) and Adsorption Kinetics

Jing Wang; Ke Shan; Yanhua Tang; Na Wu; Nan Li

doi:10.3390/ma16031189

The Adsorption of CTC onto CFBs: A Study on Fabrication of Magnetic Cellulose/Fe₃O₄ Beads (CFBs) and Adsorption Kinetics

Materials (Basel). 2023 Jan 30;16(3):1189. doi: 10.3390/ma16031189.

Authors

Jing Wang¹, Ke Shan¹, Yanhua Tang¹, Na Wu¹, Nan Li¹

Affiliation

¹ School of Chemistry and Resources Engineering, Honghe University, Mengzi 661199, China.

Abstract

Magnetic cellulose/Fe₃O₄ beads (CFBs) were fabricated by dispersing Fe₃O₄ particles in a microcrystalline cellulose (MCC) matrix. The CFBs were characterized by X-ray diffraction (XRD), vibrating sample magnetometry (VSM), energy dispersive X-ray spectrometry (EDS), Brunauer-Emmett-Teller (BET) analysis and scanning electron microscopy (SEM). The adsorption behaviors of CFBs were studied by chlortetracycline hydrochloride (CTC) adsorption experiments. By means of adsorption kinetics and isotherms, the adsorption mechanisms were explored. The results show that quasi-spherical CFBs with a BET surface area as high as 119.63 m²/g were successfully tailored, with the high saturation magnetization (Ms > 40 emu/g) guaranteeing the magnetic separation of CFBs from wastewater. The process of adsorbing CTC onto CFBs involves monolayer chemical adsorption, and the maximum adsorption capacity for CTC estimated by the Langmuir model is 89.53 mg/g. The CFB product shows better adsorption performance in acidic solution than in basic solution.

Keywords: CTC; adsorption; adsorption kinetics; magnetic cellulose/Fe3O4.

Grants and funding

National Natural Science Foundation of China (Nos. 51962004 and 51562009), the Science Foundation of Yunnan Provincial Department of Education (Grant No. 2022J0892), Joint Fund of Fundamental Research for Yunnan Local Undergraduate Universities (Grant No. 202101BA070001-241).