Detoxification mechanism of asbestos materials by microwave treatment

N. Yoshikawa; K. Kashimura; M. Hashiguchi; M. Sato; S. Horikoshi; T. Mitani; N. Shinohara

doi:10.1016/j.jhazmat.2014.09.030

Detoxification mechanism of asbestos materials by microwave treatment

N. Yoshikawa, K. Kashimura, M. Hashiguchi, M. Sato, S. Horikoshi, T. Mitani, N. Shinohara

ENG - Graduate School of Engineering (Common - Materials Science and Engineering)

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

30 Citations (Scopus)

Abstract

The detoxification mechanism of asbestos materials was investigated through simulations and experiments. The permittivities of pure CaO and Mg₃Si₄O₁₂, as quasi-asbestos materials, were measured using the cavity perturbation method. The real and imaginary parts of the relative permittivity (e{open}_r' and e{open}_r″) of CaO are functions of temperature, and numerical simulations revealed the thermal distributions in an electromagnetic field with respect to both asbestos shape and material configuration based on permittivity. Optical microscopic observation revealed that the thickness of chrysotile fibers decreased as a result of CaO heating. The heating mechanism of asbestos materials has been determined using CaO phase, and the detoxification mechanism of asbestos materials was discussed based on the heating mechanism.

Original language	English
Pages (from-to)	201-206
Number of pages	6
Journal	Journal of Hazardous Materials
Volume	284
DOIs	https://doi.org/10.1016/j.jhazmat.2014.09.030
Publication status	Published - 2015 Mar 2

Keywords

Amosite
Asbestos materials
Chrysotile
Crashed slate
Microwave treatment
Selective heating

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10.1016/j.jhazmat.2014.09.030

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title = "Detoxification mechanism of asbestos materials by microwave treatment",

abstract = "The detoxification mechanism of asbestos materials was investigated through simulations and experiments. The permittivities of pure CaO and Mg3Si4O12, as quasi-asbestos materials, were measured using the cavity perturbation method. The real and imaginary parts of the relative permittivity (e{open}r' and e{open}r″) of CaO are functions of temperature, and numerical simulations revealed the thermal distributions in an electromagnetic field with respect to both asbestos shape and material configuration based on permittivity. Optical microscopic observation revealed that the thickness of chrysotile fibers decreased as a result of CaO heating. The heating mechanism of asbestos materials has been determined using CaO phase, and the detoxification mechanism of asbestos materials was discussed based on the heating mechanism.",

keywords = "Amosite, Asbestos materials, Chrysotile, Crashed slate, Microwave treatment, Selective heating",

author = "N. Yoshikawa and K. Kashimura and M. Hashiguchi and M. Sato and S. Horikoshi and T. Mitani and N. Shinohara",

note = "Funding Information: The authors are grateful to Natori City (Miyagi, Japan) and the Ministry of Economy, Trade, and Industry of Japan. The present study was supported by the Research Institute for Sustainable Humanosphere, Kyoto University (Project: Mission Research, Adam, Metlab) and the Environment Research and Technology Development Fund ( ZF-1203 ) of the Ministry of the Environment of Japan. Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2015",

month = mar,

day = "2",

doi = "10.1016/j.jhazmat.2014.09.030",

language = "English",

volume = "284",

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AU - Yoshikawa, N.

AU - Kashimura, K.

AU - Hashiguchi, M.

AU - Sato, M.

AU - Horikoshi, S.

AU - Mitani, T.

AU - Shinohara, N.

N1 - Funding Information: The authors are grateful to Natori City (Miyagi, Japan) and the Ministry of Economy, Trade, and Industry of Japan. The present study was supported by the Research Institute for Sustainable Humanosphere, Kyoto University (Project: Mission Research, Adam, Metlab) and the Environment Research and Technology Development Fund ( ZF-1203 ) of the Ministry of the Environment of Japan. Publisher Copyright: © 2014 Elsevier B.V.

PY - 2015/3/2

Y1 - 2015/3/2

N2 - The detoxification mechanism of asbestos materials was investigated through simulations and experiments. The permittivities of pure CaO and Mg3Si4O12, as quasi-asbestos materials, were measured using the cavity perturbation method. The real and imaginary parts of the relative permittivity (e{open}r' and e{open}r″) of CaO are functions of temperature, and numerical simulations revealed the thermal distributions in an electromagnetic field with respect to both asbestos shape and material configuration based on permittivity. Optical microscopic observation revealed that the thickness of chrysotile fibers decreased as a result of CaO heating. The heating mechanism of asbestos materials has been determined using CaO phase, and the detoxification mechanism of asbestos materials was discussed based on the heating mechanism.

AB - The detoxification mechanism of asbestos materials was investigated through simulations and experiments. The permittivities of pure CaO and Mg3Si4O12, as quasi-asbestos materials, were measured using the cavity perturbation method. The real and imaginary parts of the relative permittivity (e{open}r' and e{open}r″) of CaO are functions of temperature, and numerical simulations revealed the thermal distributions in an electromagnetic field with respect to both asbestos shape and material configuration based on permittivity. Optical microscopic observation revealed that the thickness of chrysotile fibers decreased as a result of CaO heating. The heating mechanism of asbestos materials has been determined using CaO phase, and the detoxification mechanism of asbestos materials was discussed based on the heating mechanism.

KW - Amosite

KW - Asbestos materials

KW - Chrysotile

KW - Crashed slate

KW - Microwave treatment

KW - Selective heating

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SN - 0304-3894

VL - 284

SP - 201

EP - 206

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

ER -

Detoxification mechanism of asbestos materials by microwave treatment

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Keywords

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