A hierarchically porous MgFe2O4/gamma-Fe2O3 magnetic microspheres for efficient removals of dye and pharmaceutical from water
Publication in refereed journal

香港中文大學研究人員

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摘要Hierarchically porous MgFe2O4/gamma-Fe2O3 magnetic microspheres were reported as novel efficient adsorbent for the removals of dye and pharmaceutical from water. The spontaneous formation and organization of nanoparticles of MgFe2O4 on gamma-Fe2O3 matrix was based on a cheap, nontoxic and facile technique involving using pine pollen as template. The as-prepared pollen-morphic MgFe2O4/gamma-Fe2O3 exhibited hierarchically porous structure composed of nanocrystallites with grain sizes of 8 nm. The adsorption kinetics equilibrium and thermodynamics of congo red (CR) and minocycline (MC) onto MgFe2O4/gamma-Fe2O3 and gamma-Fe2O3 were investigated. The as-synthesized magnetic microspheres exhibited excellent adsorption performances. Maximum adsorption capacities of 259.1 mg/g and 200.8 mg/g were obtained for congo red and minocycline, respectively. The adsorption kinetics and isotherm of congo red and minocycline onto the as-synthesized samples followed the pseudo-second-order and Langmuir monolayer model, respectively, and the adsorption processes were spontaneous and endothermic in nature. The adsorbed samples could be regenerated by methanol or NaOH solution, and easily magnetically separated from aqueous solution. The synthesized materials might act as excellent adsorbents for environmental processes. (C) 2015 Elsevier B.V. All rights reserved.
著者Lu L, Li J, Yu J, Song P, Ng DHL
期刊名稱Chemical Engineering Journal
出版年份2016
月份1
日期1
卷號283
出版社ELSEVIER SCIENCE SA
頁次524 - 534
國際標準期刊號1385-8947
電子國際標準期刊號1873-3212
語言英式英語
關鍵詞Adsorption; Dye; Magnetic microspheres; MgFe2O4/gamma-Fe2O3; Pharmaceutical; Pine pollen
Web of Science 學科類別Engineering; Engineering, Chemical; Engineering, Environmental

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