Toyoda Lab. Environmental Geochemistry

Dr. Kazuhiro Toyoda

Associate Professor

Division of Environmental Science Development
[Research Faculty of Environmental Earth Science]
Graduate School of Environmental Science
Hokkaido University

E-mail address: kazuhiro@ees.hokudai.ac.jp
Office Tel & Fax: +81-11-706-4512
Office Location: Room C-408, GSEES build., Hokkaido Univ., N10W5, Kita-ku, Sapporo 060-0810, JAPAN

　
Interests: UV-B effect on forest soil, Bioremediation, Paleolimnology,
Inorganic Geochemistry, Environmental Mineralogy,
Analytical Geochemistry, Environmental Radioactivity

　
Education:

1982, B.A. in Chemistry, Faculty of Science, The University of Tokyo. Thesis: "Geochemical study of underground water in watershed area of Tama river ". Supervisor: Prof. Ken Tominaga

1984: MSc., in Chemistry, Faculty of Science, The University of Tokyo. Thesis: "Geochemical study of 1400 m boring core sediment samples in Lake Biwa". Supervisor: Prof. Keiichiro Fuwa

1987: Ph.D., in Chemistry, Faculty of Science, The University of Tokyo. Thesis: "Geochemical studies of manganese nodules and pelagic sediment of the Pacific". Supervisor: Prof. Akimasa Masuda

2001: Visiting Scholar (MEXT oversea fellowship), Scripps Institution of Oceanography University of California, San Diego,"Factors influencing bacterial Mn(II) oxidation." Menter Professor Dr. Bradley Tebo

Employment:

1988-1993: Research Associate, Mineralogical Institute, Faculty of Science, the University of Tokyo.

1993-1995: Research Associate, Mineralogical Institute, Graduate School of Science, The University of Tokyo.

1995-2005: Associate Professor, Division of Material Science, Graduate School of Environmental Earth Science, Hokkaido University.

2005-present: Associate Professor, Division of Environmental Science Creation, Graduate School of Environmental Science [Faculty of Environmental Earth Science] Hokkaido University.

Laboratory　group

Postgraduate Researcher:

Yoshistugu Shinozuka, PhD. in Environmental Earth Science, 2005, Thesis: " The variability of inorganic elemental profiles in sediment cores of Lake Suigetsu and Lake Biwa across the late-glacial/Holocene "

Current Graduate Students:

Lim, Chungwan, M.S. in Environmental Earth Science, Seoul National University. " Construction of alkalic tephrochronological framework in the Japan/East Sea for testing the synchronization of abrupt changes during the Late Quaternary " (PhD. anticipated 2008), Research Assistant of Center of Excellence project

Masanori Gunji, B.S. in Chemistry, Kwansei Gakuin University. Research: "Inorganic geochemistry on the sedimentary paleoenvironment of Kathmandu basin, Nepal" (M.S. anticipated 2006).

Kazunari Miyata, B.S. in Environmental Engineering, Shinshu University. Research: "bioremediation effect of manganese(II) oxidation spore" (M.S. anticipated 2006).

Kengo Nishioka, B.S. in Biochemistry, Hokkaido University. Tentative Research: "The effect of UV-B radiation onto the soil of Boreal Forest " (M.S. anticipated 2007).

Past Graduate Students:

Yoshistugu Shinozuka, M.S., 1998 “The study on the variability of inorganic elemental profiles in sediment cores of Lake Suigetsu and Lake Biwa across the late-glacial/Holocene.”

Naoho Baba, M.S., 1999, “Material chemistry of biogenic apatite as the absorbent of Actinium in environment using the lanthanum as the analogous elements ”. Current: Nippon Sanso cooperation

Shiho Imai, M.S., 1999, “Availability of Microwave digestion of sediment samples and its application to ICP analysis”. Current: Environmental control center. Co. Ltd.

Tomoko Nakajima, M.S., 2000, JAERI fellowship (past receipient) “Solubility of Selenium metal”.

Takuji Murata, M.S., 2001, “Inorganic geochemical study of loess deposits in China” Current: Ibiden Co. Ltd.

Kousuke Yamazaki, M.S., 2001, “Inorganic chemical composition of coral core of Hainan island in China and its proxies for paleo-temperature ” Current: Nippon Paper Industries.

Yuki Moriyasu, M.S., 2004, " Determination of arsenic (III) and arsenic (V) by HG-ICP-AES and scavenging of As by manganese-oxidizing enzyme" Current: Ono pharmaceutical Co. Ltd.

Masahiro Miura, M.S., 2004, "Lead isotope determination of fault gauge samples for the detection of ground water paleo-migration" Current: Industrial Analysis Service Co. Ltd.

Organization

Every Monday morning we hold a round table. A round table begins with a business meeting where we discuss matters of general interest and solve problems. During a round-table, every member in the lab briefly reviews events and results since the last round table and figure goals for the next interval. Round tables allow us to keep current between major research presentations, and ensure communication and exchange of help and ideas among lab members. Each lab member has a regular weekly meeting time (Petit-seminar) with Kazu, as well as frequent informal contact. Friday afternoon we hold a research presentation by a member of the lab or a visitor as appropriate.