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

doi:10.1007/s10751-013-0858-x

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

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	197-204
Number of pages	8
Journal	Hyperfine Interactions
Volume	224
Issue number	1-3
DOIs	https://doi.org/10.1007/s10751-013-0858-x
State	Published - Jan 2014

Bibliographical note

Funding Information:
Acknowledgements This work was financially supported by the Brazilian Agencies CAPES and CNPq. The authors are grateful to Dr. José Albino Oliveira de Aguiar for XRD analyses and Dr. Adilson Jesus Aparecido de Oliveira for magnetization measurements.

Keywords

Diatomite
Immobilization
Invertase
Magnetic particles
Montmorillonite

Access to Document

10.1007/s10751-013-0858-x

Cite this

@article{c30826665cf442339871fb7aff3ddd39,

title = "Magnetic composites from minerals: Study of the iron phases in clay and diatomite using M{\"o}ssbauer spectroscopy, magnetic measurements and XRD",

abstract = "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 M{\"o}ssbauer 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. M{\"o}ssbauer 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.",

keywords = "Diatomite, Immobilization, Invertase, Magnetic particles, Montmorillonite",

author = "M. Cabrera and Maciel, {J. C.} and J. Quispe-Marcatoma and B. Pandey and Neri, {D. F.M.} and F. Soria and E. Baggio-Saitovitch and {de Carvalho}, {L. B.}",

note = "Funding Information: Acknowledgements This work was financially supported by the Brazilian Agencies CAPES and CNPq. The authors are grateful to Dr. Jos{\'e} Albino Oliveira de Aguiar for XRD analyses and Dr. Adilson Jesus Aparecido de Oliveira for magnetization measurements.",

year = "2014",

month = jan,

doi = "10.1007/s10751-013-0858-x",

language = "Ingl{\'e}s",

volume = "224",

pages = "197--204",

journal = "Hyperfine Interactions",

issn = "0304-3843",

publisher = "Springer Nature",

number = "1-3",

}

TY - JOUR

T1 - Magnetic composites from minerals

T2 - Study of the iron phases in clay and diatomite using Mössbauer spectroscopy, magnetic measurements and XRD

AU - Cabrera, M.

AU - Maciel, J. C.

AU - Quispe-Marcatoma, J.

AU - Pandey, B.

AU - Neri, D. F.M.

AU - Soria, F.

AU - Baggio-Saitovitch, E.

AU - de Carvalho, L. B.

N1 - Funding Information: Acknowledgements This work was financially supported by the Brazilian Agencies CAPES and CNPq. The authors are grateful to Dr. José Albino Oliveira de Aguiar for XRD analyses and Dr. Adilson Jesus Aparecido de Oliveira for magnetization measurements.

PY - 2014/1

Y1 - 2014/1

N2 - 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.

AB - 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.

KW - Diatomite

KW - Immobilization

KW - Invertase

KW - Magnetic particles

KW - Montmorillonite

UR - http://www.scopus.com/inward/record.url?scp=84889250423&partnerID=8YFLogxK

U2 - 10.1007/s10751-013-0858-x

DO - 10.1007/s10751-013-0858-x

M3 - Artículo

AN - SCOPUS:84889250423

SN - 0304-3843

VL - 224

SP - 197

EP - 204

JO - Hyperfine Interactions

JF - Hyperfine Interactions

IS - 1-3

ER -

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

Abstract

Bibliographical note

Keywords

Access to Document

Other files and links

Fingerprint

Cite this