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Effect of magnetic field on nano-magnetite composite exhibits in ion-adsorption.
Lo, Fabian Fosheng; Kow, Kien-Woh; Kung, Fabian; Ahamed, Firnaaz; Kiew, Peck-Loo; Yeap, Swee-Pin; Chua, Huang-Shen; Chan, Chung-Hung; Yusoff, Rozita; Ho, Yong Kuen.
Afiliación
  • Lo FF; Department of Chemical and Petroleum Engineering, Faculty of Engineering, Technology & Built Environment, UCSI University, Kuala Lumpur 56000, Malaysia.
  • Kow KW; Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, The University of Nottingham Ningbo China, Ningbo 315100, China. Electronic address: Kien-Woh.Kow@nottingham.edu.cn.
  • Kung F; Faculty of Engineering, Multimedia University, 63100, Cyberjaya, Selangor, Malaysia.
  • Ahamed F; Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Selangor, Malaysia.
  • Kiew PL; Department of Chemical and Petroleum Engineering, Faculty of Engineering, Technology & Built Environment, UCSI University, Kuala Lumpur 56000, Malaysia.
  • Yeap SP; Department of Chemical and Petroleum Engineering, Faculty of Engineering, Technology & Built Environment, UCSI University, Kuala Lumpur 56000, Malaysia.
  • Chua HS; School of Engineering, University of Wollongong (UOW) Malaysia KDU, Jalan Kontraktor U1/14, Seksyen U1, 14 Glenpark U1, 40150 Shah Alam, Selangor, Malaysia.
  • Chan CH; Advanced Oleochemical Technology Division, Malaysian Palm Oil Board, 43000 Kajang, Selangor, Malaysia.
  • Yusoff R; Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50600 Kuala Lumpur, Malaysia.
  • Ho YK; Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Selangor, Malaysia.
Sci Total Environ ; 780: 146337, 2021 Aug 01.
Article en En | MEDLINE | ID: mdl-33770606
Nano-magnetites are widely researched for its potential as an excellent adsorbent in many applications. However, the efficiency of the nano-magnetites are hindered by their tendency to agglomerate. In this work, we dispersed and embedded the nano-magnetites in a porous silica gel matrix to form a nanocomposite to reduce the extent of agglomeration and to enhance the adsorption performance. Our experimental results showed that the removal efficiency of Cu2+ ion has improved by 46% (22.4 ± 2.2%) on the nano-magnetite-silica-gel (NMSG) nanocomposite as compared to pure nano-magnetites (15.3 ± 0.6%). The adsorption capacity is further enhanced by 39% (from 11.2 ± 1.1 to 15.6 ± 1.6 mg/g) by subjecting the NMSG to a magnetic field prior to adsorption. We infer that the magnetic field aligned the magnetic domains within the nano-magnetites, resulting in an increased Lorentz force during adsorption. Similar alignment of magnetic domains is near to impossible in pure nano-magnetites due to severe agglomeration. We further found that the adsorption capacity of the NMSG can be manipulated with an external magnetic field by varying the strength and the configurations of the field. Equipped with proper process design, our finding has great potentials in processes that involve ion-adsorptions, for example, NMSG can: (i) replace/reduce chemical dosing in controlling adsorption kinetics, (ii) replace/reduce complex chemicals required in ion-chromatography columns, and (iii) reduce wastage of nano-adsorbents by immobilizing it in a porous matrix.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2021 Tipo del documento: Article País de afiliación: Malasia Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2021 Tipo del documento: Article País de afiliación: Malasia Pais de publicación: Países Bajos