title: Efficient removal of antibiotics in a fluidized bed reactor by facile fabricated magnetic powdered activated carbon.
abstract: Powdered activated carbons (PACs) with micrometer size are showing great potential for enabling and improving technologies in water treatment. The critical problem in achieving practical application of PAC involves simple, effective fabrication of magnetic PAC and the design of a feasible reactor that can remove pollutants and recover the adsorbent efficiently. Herein, we show that such materials can be fabricated by the combination of PAC and magnetic Fe3O4with chitosan-Fe hydrogel through a simple co-precipitation method. According to the characterization results, CS-Fe/Fe3O4/PAC with different micrometers in size exhibited excellent magnetic properties. The adsorption of tetracycline was fast and efficient, and 99.9% removal was achieved in 30 min. It also possesses good usability and stability to co-existing ions, organics, and different pH values due to its dispersive interaction nature. Finally, the prepared CS-Fe/Fe3O4/PAC also performed well in the fluidized bed reactor with electromagnetic separation function. It could be easily separated by applying a magnetic field and was effectively in situ regenerated, indicating a potential of practical application for the removal of pollutants from water.
authors.affiliation: MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
authors.forename: Jianqing
authors.initials: J
authors.lastname: Ma
authors.affiliation: MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
authors.forename: Qunfeng
authors.initials: Q
authors.lastname: Yang
authors.affiliation: College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou, 310015, China.
authors.forename: Dongmei
authors.initials: D
authors.lastname: Xu
authors.affiliation: College of Pharmaceutics and Material Engineering, Jinhua Polytechnic, Jinhua, 321007, China.
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Zeng
authors.affiliation: MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China. wenyuezhong@zju.edu.cn.
authors.forename: Yuezhong
authors.initials: Y
authors.lastname: Wen
authors.affiliation: MOE Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
authors.forename: Weiping
authors.initials: W
authors.lastname: Liu
mesh_terms: D000327:Adsorption; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification*; D002244:Carbon / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry*; D008280:Magnetics; D013752:Tetracycline / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D000900:Anti-Bacterial Agents; D002606:Charcoal; D002244:Carbon; D013752:Tetracycline
keywords: Activated carbon; Adsorption; Antibiotics; Magnetic separation