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 (ɛr' and ɛr″) 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.
authors.affiliation: Tohoku University, 6-6 Aoba, Aramaki, Aoba, Miyagi 980-8579, Japan. Electronic address: yoshin@material.tohoku.ac.jp.
authors.forename: N
authors.initials: N
authors.lastname: Yoshikawa
authors.affiliation: Faculty of Engineering, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan. Electronic address: kashimura@isc.chubu.ac.jp.
authors.forename: K
authors.initials: K
authors.lastname: Kashimura
authors.affiliation: Keisoku Engineering System Co., Ltd., 1-9-5 Kanda, Chikusaku 101-0047, Tokyo, Japan. Electronic address: hashiguchi@kesco.co.jp.
authors.forename: M
authors.initials: M
authors.lastname: Hashiguchi
authors.affiliation: Faculty of Engineering, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan. Electronic address: satomoto@isc.chubu.ac.jp.
authors.forename: M
authors.initials: M
authors.lastname: Sato
authors.affiliation: Sophia University, Kioicho, Chiyoda-ku, Tokyo 102-8554, Japan. Electronic address: horikosi@sophia.ac.jp.
authors.forename: S
authors.initials: S
authors.lastname: Horikoshi
authors.affiliation: Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan. Electronic address: mitani@rish.kyoto-u.ac.jp.
authors.forename: T
authors.initials: T
authors.lastname: Mitani
authors.affiliation: Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan. Electronic address: shino@rish.kyoto-u.ac.jp.
authors.forename: N
authors.initials: N
authors.lastname: Shinohara
mesh_terms: D001194:Asbestos / Q000737:chemistry*; D017632:Asbestos, Serpentine / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry*; D003198:Computer Simulation; D055866:Earthquakes; D060733:Electromagnetic Radiation; D004785:Environmental Pollutants / Q000737:chemistry; D006358:Hot Temperature; D007564:Japan; D008858:Microscopy, Phase-Contrast; D008872:Microwaves; D055095:Optics and Photonics; D010087:Oxides / Q000737:chemistry*
chemical_list: D017632:Asbestos, Serpentine; D017610:Calcium Compounds; D004785:Environmental Pollutants; D010087:Oxides; D001194:Asbestos; C016538:lime
keywords: Amosite; Asbestos materials; Chrysotile; Crashed slate; Microwave treatment; Selective heating