We focuse on the decomposition, and on the technology of recycling for chemical substances that may have negative impact on the environment, while they have high functionality and therefore important not only in industry but also in our lives.
　Specifically, we are developing new reaction technologies (subcritical and supercritical water reactions and photochemical reactions) to decompose organofluorine compounds (including fluoropolymers as well) that consist of strong carbon-fluorine bonds, enabling it to be used as a resource again.

　Organofluorine compounds and fluoropolymers have unique characters such as high thermal and chemical stability, high surface-active effect, and high light transparency. These chemicals, although, are used in industry as functional materials, waste treatment techniques for them are not well established. These chemicals may be decomposed by incineration. This, however, requires high temperatures and HF gas is formed, which can seriously damage the incinerator. Therefore, development of decomposition techniques that work under mild condition is desired. The method should produce F^- ions, because such method would allow the recycling of a fluorine resource.

《 Related representative papers 》
R. Honma, H. Hori, F. Reis da Cunha, N. Horiike, L. Steinbach, B. Ameduri,“Permanganate-induced efficient mineralization of poly(vinylidene fluoride) and vinylidene-fluoride based copolymers in low-temperature subcritical water", Industrial & Engineering Chemistry Research, 2019, 58(29), 13030-13040. DOI:10.1021/acs.iecr.9b01921

H. Hori, H. Tanaka, K. Watanabe, T. Tsuge, T. Sakamoto, A. Manseri, B. Ameduri, “Hydrogen peroxide induced efficient mineralization of poly(vinylidene fluoride) and related copolymers in subcritical water", Industrial & Engineering Chemistry Research, 2015, 54(35), 8650-8658. DOI: 10.1021/acs.iecr.5b01716

H. Hori, Y. Nagaoka, M. Murayama, S. Kutsuna, “Efficient decomposition of perfluorocarboxylic acids and alternative fluorochemical surfactants in hot water”, Environ. Sci. Technol., 2008, 42, 7438-7443. DOI: 10.1021/es800832p

H. Hori, Y. Nagaoka, A. Yamamoto, T. Sano, N. Yamashita, S. Taniyasu, S. Kutsuna, I. Osaka, R. Arakawa, “Efficient decomposition of environmentally persistent perfluorooctanesulfonate and related fluorochemicals using zerovalent iron in subcritical water”, Environ. Sci. Technol, 2006, 40, 1049-1054. DOI: 10.1021/es0517419

Hisao Hori, Ph.D

■ Education and Professional Experience
1990　　　　　　 Ph.D. Graduate School of Science and Technology, Keio University, Yokohama, Japan
1990-1993 　　　Researcher
　　　　　　　 　 Toshiba Corporation, Kawasaki, Japan
1993-2001 　　　Senior Researcher, National Institute for Resources and Environment, Tsukuba,
　　　 　 　　　　Japan
1997-1998 　　　Visiting Researcher
　　　　　　　 　 Max-Plank-Institut fuer Kohlenforschung, Germany
2001-2010 　　　Group Leader
　　　　　　　 　 National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba,
　　　 　 　　　　Japan
2010- 　　　　　 Professor
　　　　　　 　　 Department of Chemistry, Faculty of Science, Kanagawa University, Hiratsuka, Japan

■ Research Interests
Environment remediation technology such as decomposition of environmentally persistent and/or harmful chemicals, which are being used in industry as functional materials, for example, organofluorine compounds, by use of sub- or supercritical fluids, photocatalysts etc.

■ Ph.D students
Ryo Honma

■ Master course students
Yuya Ohno, Satomi Oishi, Michael Biermann (exchange student from TU Clausthal, Germany)

■ Undergraduate students
Kazuma Igarashi, Tomoki, Ushio, Rei Kawashima, Yuki Suzaki, Yukino Nishimura, Jin Hamaura, Koki Hayakawa, Yuki Yonezato
　　　　　

J. Hamaura, R. Honma, Hisao Hori, A. Manseri, B. Ameduri,"Efficient fluoride recovery from poly(vinylidene fluoride), poly(vinylidene fluoride-co-hexafluoropropylene) copolymer and poly(ethylene-co-tetrafluoroethylene) copolymer using superheated water with alkaline reagent", European Polymer Journal, 2023, 182, 111724. DOI:10.1016/j.eurpolymj.2022.111724

H. Hori, R.Honma, K. Igarashi, A. Manseri, B. Ameduri, "Oxidative mineralization of poly[vinylidene fluoride-co-2- (trifluoromethyl)acrylic acid] copolymers in superheated water", Industrial & Engineering Chemistry Research,2022, 61(3),1386-1397. DOI:10.1021/acs.iecr.1c04299

H. Hori, T. Ushio, T. Asai, R. Honma, N. Eid, B. Ameduri, "Efficient mineralization of a novel fluorotelomer surfactant, 2H,3H,3H,5H,5H,6H,6H-4-thia-perfluoro(2-methyl)-1-dodecanoic acid, in superheated water induced by a combination of potassium permanganate and dioxygen", Chemical Engineering Journal, 2021,, 405, 127006. DOI:10.1016/j.cej.2020.127006

H. Hori, S. Oishi, H. Kato, R. Kodama,"Complete mineralization of fluorinated ionic liquids in subcritical water in the presence of potassium permanganate", Industrial & Engineering Chemistry Research, 2020, 59(13), 5566-5575. DOI:10.1021/acs.iecr.9b06198

R. Honma, H. Hori, F. Reis da Cunha, N. Horiike, L. Steinbach, B. Ameduri,“Permanganate-induced efficient mineralization of poly(vinylidene fluoride) and vinylidene-fluoride based copolymers in low-temperature subcritical water", Industrial & Engineering Chemistry Research, 2019, 58(29), 13030-13040. DOI:10.1021/acs.iecr.9b01921

H. Hori, T. Otsu, T. Yasukawa, R.Morita, S. Ishii, T. Asai,“Recovery of rhenium from aqueous mixed metal solutions by selective precipitation: A photochemical approach" Hydrometallurgy, 2019, 183, 151-158. DOI:10.1016/j.hydromet.2018.12.003

H. Hori, T. Kakizawa, N. Kuriyama, A. Kabuki, M. Otsuki, Y. Horii,“Decomposition of environmentally persistent cyclic methylsiloxanes in subcritical water" Sustainable Chemistry and Pharmacy, 2019, 13, 100160. DOI:10.1016/j.scp.2019.100160

H. Hori, K. Ogi, Y. Fujita, Y. Yasuda, E. Nagashima, Y. Matsuki, K. Nomiya,“Oxidative removal of dibenzothiophene and related sulfur compounds from fuel oils under pressurized oxygen at room temperature with hydrogen peroxide and a phosphorus-free catalyst: sodium decatungstate" Fuel Processing Technology, 2018, 179, 175-183. DOI:10.1016/j.fuproc.2018.07.003

H. Hori, A. Kamijo, M. Inoue, A. Chino, Q. Wu, K. Kannan,“Efficient decomposition of perchlorate to chloride ions in subcritical water by use of steel slag" Environmental Science and Pollution Research, 2018, 25, 7262-7270. DOI:10.1007/s11356-016-7332-7


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