Magnetic composites from minerals: Study of the iron phases in clay and diatomite using Mössbauer spectroscopy, magnetic measurements and XRD

M. Cabrera, J. C. Maciel, J. Quispe-Marcatoma, B. Pandey, D. F.M. Neri, F. Soria, E. Baggio-Saitovitch, L. B. de Carvalho

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

9 Citas (Scopus)

Resumen

Magnetic particles as matrix for enzyme immobilization have been used and due to the enzymatic derivative can be easily removed from the reaction mixture by a magnetic field. This work presents a study about the synthesis and characterization of iron phases into magnetic montmorillonite clay (mMMT) and magnetic diatomaceous earth (mDE) by 57Fe Mössbauer spectroscopy (MS), magnetic measurements and X-ray diffraction (XRD). Also these magnetic materials were assessed as matrices for the immobilization of invertase via covalent binding. Mössbauer spectra of the magnetic composites performed at 4.2 K showed a mixture of magnetite and maghemite about equal proportion in the mMMT, and a pure magnetite phase in the sample mDE. These results were verified using XRD. The residual specific activity of the immobilized invertase on mMMT and mDE were 83 % and 92.5 %, respectively. Thus, both magnetic composites showed to be promising matrices for covalent immobilization of invertase.

Idioma originalInglés
Páginas (desde-hasta)197-204
Número de páginas8
PublicaciónHyperfine Interactions
Volumen224
N.º1-3
DOI
EstadoPublicada - ene. 2014
Publicado de forma externa

Huella

Profundice en los temas de investigación de 'Magnetic composites from minerals: Study of the iron phases in clay and diatomite using Mössbauer spectroscopy, magnetic measurements and XRD'. En conjunto forman una huella única.

Citar esto