Kazuhiko Takeda

Last Updated :2024/10/11

Affiliations, Positions
Graduate School of Integrated Sciences for Life, Professor
Web Site
https://eac.hiroshima-u.ac.jp/
E-mail
takedaqhiroshima-u.ac.jp
Other Contact Details
1-7-1，Kagamiyama，Higashi-Hiroshima, Japan
TEL : (+81)824-24-6506 FAX : (+81)824-24-0758
Self-introduction
I am a professional environmental scientist based on analytical chemistry of trace materials, reactive oxygen species and microplastics in the aquatic environments and atmosphere, The current works of our research group are focused on 1) photochemistry of microplastics in aquatic environments, 2) determination of iodine and bromide in seawater and river water using an ion chromatography and their geochemistry, 3) environmental photochemistry of reactive oxygen species, and 4) photochemical dynamics of pollutants. We are approaching these themes with laboratory work and fieldwork.

Basic Information

Major Professional Backgrounds

  • 1990/12/01, 1999/03/31, Hiroshima University, School of Integrated Arts and Sciences, Research Associate
  • 1999/04/01, 2019/03/31, Hiroshima University, Graduate School of Biosphere Science, Associate Professor

Educational Backgrounds

  • Hiroshima University, Graduate School, Division of Biophere Sciences, Japan, 1987/04, 1989/03
  • Hiroshima University, Faculty of Science, Japan, 1983/04, 1987/03

Academic Degrees

  • Doctor of Philosophy, Hiroshima University
  • Master, Hiroshima University

Educational Activity

  • [Bachelor Degree Program] School of Integrated Arts and Sciences : Department of Integrated Arts and Sciences : Integrated Arts and Sciences
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Transdisciplinary Science and Engineering Program
  • [Master's Program] Graduate School of Integrated Sciences for Life : Division of Integrated Sciences for Life : Program of Life and Environmental Sciences
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Transdisciplinary Science and Engineering Program
  • [Doctoral Program] Graduate School of Integrated Sciences for Life : Division of Integrated Sciences for Life : Program of Life and Environmental Sciences

In Charge of Primary Major Programs

  • Integrated Arts and Sciences

Research Fields

  • Chemistry;Applied chemistry;Analytical chemistry
  • Environmental science;Environmental analyses and evaluation;Environmental dynamic analysis
  • Environmental science;Environmental conservation;Modeling and technologies for environmental conservation and remediation

Research Keywords

  • Reactive Oxygen Species
  • Hydroxyl rodical
  • Humic Substances
  • Dissolved organic matter
  • Natural Water
  • Photochemical process
  • aldehyde
  • HPLC
  • Trace Elemental analysis
  • ICP-MS

Affiliated Academic Societies

  • The Japan Society for Analytical Chemistry, 1991
  • The Chemical Society of Japan, 1992
  • The Geochemical Society of Japan, 1992
  • The Oceanographic Society of Japan, 1998

Educational Activity

Course in Charge

  1. 2024, Liberal Arts Education Program1, 4Term, Environment and Chemistry
  2. 2024, Liberal Arts Education Program1, 2Term, Basic Concepts of Chemistry
  3. 2024, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Chemistry I
  4. 2024, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Chemistry I
  5. 2024, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Chemistry I
  6. 2024, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Chemistry I
  7. 2024, Liberal Arts Education Program1, 1Term, Experimental Methods and Laboratory Work in Chemistry I
  8. 2024, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Chemistry I
  9. 2024, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Chemistry I
  10. 2024, Liberal Arts Education Program1, 3Term, Experimental Methods and Laboratory Work in Chemistry I
  11. 2024, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Chemistry II
  12. 2024, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Chemistry II
  13. 2024, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Chemistry II
  14. 2024, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Chemistry II
  15. 2024, Liberal Arts Education Program1, 2Term, Experimental Methods and Laboratory Work in Chemistry II
  16. 2024, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Chemistry II
  17. 2024, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Chemistry II
  18. 2024, Liberal Arts Education Program1, 4Term, Experimental Methods and Laboratory Work in Chemistry II
  19. 2024, Liberal Arts Education Program1, 1Term, Basic Laboratory Work in Chemistry
  20. 2024, Liberal Arts Education Program1, 1Term, Basic Laboratory Work in Chemistry
  21. 2024, Liberal Arts Education Program1, 1Term, Basic Laboratory Work in Chemistry
  22. 2024, Undergraduate Education, 2Term, Natural Sciences of Life and Environment
  23. 2024, Undergraduate Education, Second Semester, Laboratory Work in Natural Sciences
  24. 2024, Undergraduate Education, Second Semester, Practical Methods in Natural Sciences
  25. 2024, Undergraduate Education, 1Term, Environmental Analytical Chemistry
  26. 2024, Undergraduate Education, Intensive, Shipboard Exercise for Natural Environment Studies
  27. 2024, Undergraduate Education, 3Term, Laboratory Course in Natural Environmental Sciences A
  28. 2024, Undergraduate Education, 3Term, Practical Methods in Natural Environmental SciencesA
  29. 2024, Undergraduate Education, 1Term, Laboratory Course in Natural Environmental Sciences B
  30. 2024, Undergraduate Education, 1Term, Practical Methods in Natural Environmental SciencesB
  31. 2024, Undergraduate Education, 2Term, Laboratory Course in Natural Environmental Sciences C
  32. 2024, Undergraduate Education, 2Term, Practical Methods in Natural Environmental SciencesC
  33. 2024, Undergraduate Education, 3Term, Natural Histories and Sciences
  34. 2024, Graduate Education (Master's Program) , Academic Year, Research for Academic Degree Dissertation in Life and Environmental Sciences
  35. 2024, Graduate Education (Master's Program) , First Semester, Exercises in Life and Environmental Sciences A
  36. 2024, Graduate Education (Master's Program) , Second Semester, Exercises in Life and Environmental Sciences B
  37. 2024, Graduate Education (Master's Program) , 4Term, Atmospheric Hydrosphere Chemistry
  38. 2024, Graduate Education (Doctoral Program) , 4Term, Exercises in Integrated Life Sciences
  39. 2024, Graduate Education (Doctoral Program) , Academic Year, Research for Academic Degree Dissertation in Integrated Life Sciences
  40. 2024, Graduate Education (Doctoral Program) , Intensive, Research for Academic Degree Dissertation in Integrated Life Sciences

Research Activities

Academic Papers

  1. Light-Induced Generation of Charge Carriers in Porphyrin Solids Doped with Electron-Accepting and Donatiny Molecules, Bulletin of the Chemical Society of Japan, 62, 1458-1462, 1989
  2. ★, Preparation of Porphyrin Thin Films Using the Micelle Disruption Method and Their Photoresponses., Japanese Journal of Applied Physics, 28(L), L141-L143, 1989
  3. ★, Photoelectrochemical and Optical Properties of Porphyrin Thin Films Prepared by the Electrolytic Micelle Disruption Method., Canadian Journal of Chemistry, 69, 192-197, 1991
  4. ★, Determination of nitrate in natural waters with the photo-induced conversion of nitrate to nitrite, Analytica Chimica Acta, 276, 25-32, 1993
  5. Diurnal and Seasonal distribution of hydrogen peroxide in seawater of Seto In1and Sea., Geochemical Journal, 27, 103-115, 1993
  6. Moleculer solid of zinc tetraphenilporphyrin as a model organic semiconductor with a well-defined deplition layer., Journal of Physics and Chemistry of Solids, 56, 1223-1229, 1995
  7. Thermal lens produced in nematic liquid crystal., Applied Spectroscopy, 49, 1189-1192, 1995
  8. Measurements of atmospheric and rainwater organic acids in the Hiroshima Prefecture, Japan, 1995(10), 823-829, 1995
  9. ★, Characteristics on the determination of dissolved organic nitrogen compounds in natural waters using titanium dioxide and platinized titanium dioxide mediated photocatalytic degradation, Water Research, 30, 323-330, 1996
  10. Magneto-optic fluorescence behavior of anthracene and its derivatives in a diluted magnetic fluid solution, Spectroscopy Letter, 30, 1135-1147, 1997
  11. A new, automatic hydrothermal fluid sampler using a shape memory alloy, Journal of Oceanography, 54, 241-246, 1998
  12. ★, Heavy metals and lead isotope ratios in annual rings of the Red Pine Trees collected in the Chugoku Dictrict and Comparisons with coastal sediments., 1998(2), 99-106, 1998
  13. Concentrations, deposition rates and sources of organic acids in precipitation collected in Higashi-Hiroshima, Japan, 2000(5), 357-366, 2000
  14. ★, Three-year determination of trace metals and the Lead isotope ratio in rain and snow depositions collected in Higashi- Hiroshima, Japan., Atmospheric Environment, 34, 4525-4535, 2000
  15. Acid deposition on pine needles in Mt. Gokurakuji, Hiroshima Prefecture, Japan, Japanese Journal of Biometeorology, 37, 15-20, 2000
  16. The determination of dissolved total Fe by flow injection analysis in environmental samples, Analytical Science & Technology, 14(6), 510-515, 2001
  17. Chemical compositions in rainwater at Hiroshima Prefecture, Japan, 15(4), 321-328, 2002
  18. Evaluation of cation exchange processes in acid soil slope for solute transport modelling in unsaturated zone, Carolinae-Geologica Acta Universitatis, 46(42769), 439-441, 2002
  19. The photochemical reactions of iron species in rain and snow in Higashi-Hiroshima, Japan, Analytical Science & Technology, 16(6), 466-474, 2003
  20. ★, Determination of Hydroxyl Radical Photoproduction Rates in Natural Waters, Analytical Sciences, 20(1), 153-158, 2004
  21. Contribution of nitrogen load to BOD in an urbanizing river basin, Journal of Water and Waste, 48(6), 66-73, 2006
  22. ★, Rapid and highly sensitive determination of low-molecular-weight carbonyl compounds in drinking water and natural water by preconcentration HPLC with 2,4-dinitrophenylhydrazine, Analytical Sciences, 22(12), 1509-1514, 2006
    Link to Paper Search Results by DOI
  23. Dissolved organic matter originating from the riparian shrub Salix gracilistyla, Journal of Forest Research, 12(1), 68-74, 2007
    Link to Paper Search Results by DOI
  24. Improvement of photovoltages in organic dye-sensitized solar cells by Li-intercalation in particulate TiO2 electrodes, Applied Physics Letters, 90, 103517 1-3, 2007
  25. Contribution of the photo-fenton reaction to hydroxyl radical formation rates in river and rain water samples, Analytical Sciences, 23(9), 1137-1142, 2007
    Link to Paper Search Results by DOI
  26. Exploring the correlation of particulate PAHs, sulfur dioxide, nitrogen dioxide and ozone, a preliminary study, Water Air and Soil Pollution, 194, 5-12, 2008
  27. Polycyclic aromatic hydrocarbons (PAHs) associated with atmospheric particles in Higashi Hiroshima, Japan: Influence of meteorological conditions and seasonal variations, Atmospheric Research, 88(42798), 224-233, 2008
    Link to Paper Search Results by DOI
  28. Application of Fenton reaction for nanomolar determination of hydrogen peroxide in seawater, Analytica Chimica Acta, 627(2), 270-276, 20081010
    Link to Paper Search Results by DOI
  29. Periphyton contribution to nitrogen dynamics in the discharge from a wastewater treatment plant, River Research and Applications, 25(2), 229-235, 2009
    Link to Paper Search Results by DOI
  30. Transesterification of soybean oil using combusted oyster shell waste as a catalyst, Bioresource Technology, 100(3), 1510-1513, 2009
    Link to Paper Search Results by DOI
  31. ★, Application of gamma-Ray Irradiation to Reduction of Blank for Highly Sensitive Analysis of Low Molecular Weight Aldehydes in Water, BUNSEKI KAGAKU, 58(2), 101-105, 2009
    Link to Paper Search Results by DOI
  32. Proposal of long term environmental-pollution monitoring by use of sediment cores in a small pond, Man and Environment, 35(1), 14-17, 20090301
  33. Development of an Analytical Method for Nitric Oxide Radical Determination in Natural Waters, Analytical Chemistry, 81(16), 6843-6850, 20090815
    Link to Paper Search Results by DOI
  34. Measuring the Photochemical Production of Carbon Dioxide from Marine Dissolved Organic Matter by Pool Isotope Exchange, Environmental Science & Technology, 43(22), 8604-8609, 20091115
    Link to Paper Search Results by DOI
  35. Photochemical Production and Consumption Mechanisms of Nitric Oxide in Seawater, ENVIRONMENTAL SCIENCE & TECHNOLOGY, 44(22), 8403-8408, 20101115
    Link to Paper Search Results by DOI
  36. Atmospheric formaldehyde and acetaldehyde at the campus University of Hiroshima, Japan., Semina: Ciencias Exatas e Tecnologicas, Londrina, 31(1), 23-29, 2010
  37. ★, Chemical Dosimetry System for gamma-Ray Irradiation Based on the Formation of Phenol from Aqueous Benzene Solutions, ANALYTICAL SCIENCES, 27(12), 1213-1216, 2012
    Link to Paper Search Results by DOI
  38. Magnetic Screening for Heavy Metal Pollution in the Wood Biomass Obtained from the Roadside Trees, Journal of the Japan Institute of Energy, 91(2), 118-126, 20120201
  39. Occurrence of Diuron and Irgarol in seawater, sediments and planktons of Seto Inland Sea, Japan, GEOCHEMICAL JOURNAL, 46(3), 169-177, 2012
    Link to Paper Search Results by DOI
  40. Combined adsorption and oxidation mechanisms of hydrogen sulfide on granulated coal ash, JOURNAL OF COLLOID AND INTERFACE SCIENCE, 377, 284-290, 20120701
    Link to Paper Search Results by DOI
  41. Mechanisms of Hydrogen Sulfide Removal with Steel Making Slag, ENVIRONMENTAL SCIENCE & TECHNOLOGY, 46(18), 10169-10174, 20120918
    Link to Paper Search Results by DOI
  42. Development of Seawater Sampler for Collection of Dissolved Gaseous Mercury Preventing Vaporization Loss and Influence of the Loss on Estimating Mercury Flux, BUNSEKI KAGAKU, 61(12), 1063-1072, 2012
    Link to Paper Search Results by DOI
  43. Applicability of solar photo-Fenton process to the remediation of water polluted with pesticides, NATURE AND SCIENCE, 11(1), 144-152, 20130101
  44. Effect of Carbonated Steelmaking Slag on the Growth of Benthic Microalgae, TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 99(3), 260-266, 2013
    Link to Paper Search Results by DOI
  45. ★, Phenol Formation in Gamma Radiolysis of Aqueous Benzene Solution with Sodium Hypochlorite, JOURNAL OF PHYSICAL CHEMISTRY A, 117(9), 1941-1945, 20130307
    Link to Paper Search Results by DOI
  46. ★, Determination of phenolic concentrations in dissolved organic matter pre-concentrate using solid phase extraction from natural water, MARINE CHEMISTRY, 157, 208-215, 20131220
    Link to Paper Search Results by DOI
  47. Development of Iron Supplying Fertilizer for Restoration of Coastal Marine Ecosystems, 51(2), 105-115, 2014
  48. Removal of hydrogen sulfide with steelmaking slag by concurrent reactions of sulfide mineralization and oxidation, ECOLOGICAL ENGINEERING, 63, 122-126, 2014
    Link to Paper Search Results by DOI
  49. ★, Spatial distributions of and diurnal variations in low molecular weight carbonyl compounds in coastal seawater, and the controlling factors, SCIENCE OF THE TOTAL ENVIRONMENT, 493, 454-462, 20140915
    Link to Paper Search Results by DOI
  50. Sources of hydroxyl radical in headwater streams from nitrogen-saturated forest, CHEMOSPHERE, 119, 1386-1390, 20150115
    Link to Paper Search Results by DOI
  51. Antifouling agents and Fenitrothion contamination in seawater, sediment, plankton, fish and selected marine animals from the Seto Inland Sea, Japan, GEOCHEMICAL JOURNAL, 49(1), 23-37, 20150101
    Link to Paper Search Results by DOI
  52. Photoformation rate, steady-state concentration and lifetime of nitric oxide radical (NO center dot) in a eutrophic river in Higashi-Hiroshima, Japan, CHEMOSPHERE, 119, 302-309, 2015
    Link to Paper Search Results by DOI
  53. Diuron, Irgarol 1051 and Fenitrothion contamination for a river passing through an agricultural and urban area in Higashi Hiroshima City, Japan, SCIENCE OF THE TOTAL ENVIRONMENT, 518, 450-458, 20150615
    Link to Paper Search Results by DOI
  54. Novel Fluorometric Method for the Determination of Production Rate and Steady-State Concentration of Photochemically Generated Superoxide Radical in Seawater Using 3 ',6 '-(Diphenylphosphinyl)fluorescein, ANALYTICAL CHEMISTRY, 87(24), 11998-12005, 20151215
    Link to Paper Search Results by DOI
  55. Contamination and ecological risk assessment of heavy metal in the sediment of Ala River, South-West Nigeria: An Index-Analysis Approach, International Journal of Scientific & Engineering Research, 7(1), 1392-1408, 20160101
  56. Distribution and seasonal variation of heavy metals in sediments of urban surface water, South-West Nigeria, International Journal of Scientific & Engineering Research, 7(1), 870-898, 20160101
  57. Concentration and degradation of alternative biocides and an insecticide in surface waters and their major sinks in a semi-enclosed sea, Japan, CHEMOSPHERE, 145, 256-264, 2016
    Link to Paper Search Results by DOI
  58. Material load from submarine groundwater discharge around Ohkurokami Island and Suo-ohshima Island, NIPPON SUISAN GAKKAISHI, 83(3), 385-391, 2017
    Link to Paper Search Results by DOI
  59. Pesticides and heavy metals in sediment core samples from a coastal area in Japan, GEOCHEMICAL JOURNAL, 51(6), 525-536, 2017
    Link to Paper Search Results by DOI
  60. Analysis of Particulate and Gaseous Polycyclic Aromatic Hydrocarbons (PAHs) in Higashi Hiroshima, Japan -Concentration, Distribution, and Its Seasonal Variation, Research Reports of the faulty of Engineering. Kindai University, 51, 9-13, 2017
  61. Simulation and reduction measure of photochemical oxidant in Hiroshima prefecture –based on global warming countermeasure–, People & Environment, 43(1), 14-23, 2017
  62. ★, The Iodide and Iodate Distribution in the Seto Inland Sea, Japan, AQUATIC GEOCHEMISTRY, 23(5-6), 315-330, 201712
    Link to Paper Search Results by DOI
  63. ★, Hydroxyl radical generation with a high power ultraviolet light emitting diode (UV-LED) and application for determination of hydroxyl radical reaction rate, Journal of Photochemistry and Photobiology A: Chemistry,, 340, 8-14, 20170501
    Link to Paper Search Results by DOI
  64. Photogeneration and interactive reactions of three reactive species in the Seto Inland Sea, Japan, ENVIRONMENTAL CHEMISTRY, 15(4), 236-245, 2018
    Link to Paper Search Results by DOI
  65. Evaluation of Levels, Sources and Health Hazards of Road-Dust Associated Toxic Metals in Jalalabad and Kabul Cities, Afghanistan, ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY, 74(1), 32-45, 201801
    Link to Paper Search Results by DOI
  66. Determination of Inorganic Anions in Seawater Samples by Ion Chromatography - Effects of Residual Silanol Groups on a Reversed-phase C18 Silica Column -, BUNSEKI KAGAKU, 67(1), 51-59, 201801
    Link to Paper Search Results by DOI
  67. ★, Nanomolar Determination of Hydrogen Peroxide in Coastal Seawater Based on the Fenton Reaction with Terephthalate, ANALYTICAL SCIENCES, 34(4), 459-464, 201804
    Link to Paper Search Results by DOI
  68. ★, Correction to: The iodide and iodate distribution in the Seto Inland Sea, Japan, AQUATIC GEOCHEMISTRY, 24(2), 163-164, 20180308
  69. Spatio-temporal variations of selected pesticide residues in the Kurose River in Higashi-Hiroshima city, Japan, JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES, 53(9), 602-614, 2018
    Link to Paper Search Results by DOI
  70. ★, Optimization for the Determination of Hydrogen Peroxide in River Water Based on the Fenton Reaction with Terephthalate, BUNSEKI KAGAKU, 68(2), 125-131, 201902
    Link to Paper Search Results by DOI
  71. Identifying sulfur species adsorbed on particulate matters in exhaust gas emitted from various vessels, CHEMOSPHERE, 223, 399-405, 201905
    Link to Paper Search Results by DOI
  72. Determination of Trace Iodine in Seawater - Use of Ion Chromatography and Capillary Zone Electrophoresis -, BUNSEKI KAGAKU, 68(4), 227-239, 201904
    Link to Paper Search Results by DOI
  73. Persistent organic pollutants are still present in surface marine sediments from the Seto Inland Sea, Japan, MARINE POLLUTION BULLETIN, 149, 201912
    Link to Paper Search Results by DOI
  74. Carbaryl residue concentrations, degradation, and major sinks in the Seto Inland Sea, Japan, ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 27(13), 14668-14678, 202005
    Link to Paper Search Results by DOI
  75. Photoformation of reactive oxygen species and their potential to degrade highly toxic carbaryl and methomyl in river water, CHEMOSPHERE, 244, 202004
    Link to Paper Search Results by DOI
  76. ★, Factors controlling the degradation of hydrogen peroxide in river water, and the role of riverbed sand, SCIENCE OF THE TOTAL ENVIRONMENT, 716, 20200510
    Link to Paper Search Results by DOI
  77. Singlet Oxygen Photogeneration in Coastal Seawater: Prospect of Large-Scale Modeling in Seawater Surface and Its Environmental Significance, ENVIRONMENTAL SCIENCE & TECHNOLOGY, 54(10), 6125-6133, 20200519
    Link to Paper Search Results by DOI
  78. Heterogeneity and potential aquatic toxicity of hydrogen peroxide concentrations in selected rivers across Japan, SCIENCE OF THE TOTAL ENVIRONMENT, 733, 20200901
    Link to Paper Search Results by DOI
  79. Distribution and source estimation of polycyclic aromatic hydrocarbons in coastal sediments from Seto Inland Sea, Japan, ENVIRONMENTAL CHEMISTRY, 17(7), 488-497, 2020
    Link to Paper Search Results by DOI
  80. Spatial distribution of perfluorinated organic compounds in surface marine sediments from the Seto Inland Sea, Japan, Journal of Water and Environment Technology, 18(4), 226-237, 20200810
    Link to Paper Search Results by DOI
  81. A fluorescence method for the determination of photochemically generated peroxynitrite in seawater, ANALYTICA CHIMICA ACTA, 1132, 83-92, 20201002
    Link to Paper Search Results by DOI
  82. Organic matter degradation characteristics of coastal marine sediments collected from the Seto Inland Sea, Japan, MARINE CHEMISTRY, 225, 20200910
    Link to Paper Search Results by DOI
  83. Heavy metals in urban dusts from Alexandria and Kafr El-Sheikh, Egypt: implications for human health, ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 28(2), 2007-2018, 202101
    Link to Paper Search Results by DOI
  84. Measurements, sources and sinks of photoformed reactive oxygen species in Japanese rivers, GEOCHEMICAL JOURNAL, 55(2), 89-102, 2021
    Link to Paper Search Results by DOI
  85. Dynamics and Mass Balance of Polycyclic Aromatic Hydrocarbons in and Around the Seto Inland Sea, Japan, ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY, 82(4), 467-480, 202205
    Link to Paper Search Results by DOI
  86. Optical properties of dissolved organic matter in Japanese rivers and contributions to photoformation of reactive oxygen species, SCIENCE OF THE TOTAL ENVIRONMENT, 826, 153671, 20220620
    Link to Paper Search Results by DOI
  87. Contamination, dynamics, and health risk assessment of pesticides in seawater and marine samples from the Seto Inland Sea, Japan, ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 29(45), 67894-67907, 202209
    Link to Paper Search Results by DOI
  88. ★, Migration of terephthalate from scraps of poly(ethylene terephthalate) (PET) in water and artificial seawater, SCIENCE OF THE TOTAL ENVIRONMENT, 838, 156053, 20220910
    Link to Paper Search Results by DOI
  89. Distribution and phylogeny of mercury methylation, demethylation, and reduction genes in the Seto Inland Sea of Japan, MARINE POLLUTION BULLETIN, 186, 114381, 202301
    Link to Paper Search Results by DOI
  90. ★, Photodegradation of the insecticide fipronil in aquatic environments: photo-dechlorination processes and products, ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 30(38), 89877-89888, 202308
    Link to Paper Search Results by DOI

Invited Lecture, Oral Presentation, Poster Presentation

  1. Determination of the polyethylene terephthalate microplastics (PET-MPs) in the sediments of the Seto Inland Sea, S. Furura, N. Takahshi, S. Hirashima, Y. Iwamoto, K. Takeda, Japan Geoscience Union Meeting 2024, 2024/05/27, Without Invitation, Japanese, Japan Geoscience Union
  2. Evaluation of photodegradation of microplastics in the atmosphere by using model substances, oko IWAMOTO, Mayuna ISHIMI, Yoko IWAMOTO, Yasuhiro ISHIHARA, Nobuharu Takahashi, Kazuhiko TAKEDA, Hiroshi OKOCHI, JpGU Meeting 2023, 2023/05/23, Without Invitation, Japanese, JpGU, Makuhari Messe
  3. Photodegradation of atmospheric microplastics: evaluation by laboratory experiments using model substances, Yoko IWAMOTO, Mayuna ISHIMI, Yasuhiro ISHIHARA, Nobuharu TAKAHASHI, Kazuhiko TAKEDA, Hiroshi OKOCHI, The 40th Annual Meeting and Symposium on Aerosol Science and Technology, 2023/08/30, Without Invitation, Japanese, Japan Association of Aerosol Science and Technology, Gunma (Kiryu)
  4. Atmospheric aerosol observation using a training ship base -Focusing on the dynamics of combustion-derived iron from steelworks-, Yoko IWAMOTO, Kazuki SHIMOJI, Yuki NAKAGAWA, Taisei KODAMA, Kazuhiko TAKEDA, Annual Meeting of GSJ 2023, 2023/09/23, Without Invitation, Japanese, Geochemical Society of Japan, Tokyo
  5. Tropospheric ozone depletion and iodine chemistry over the western Pacific low-latitude region: Project overview and model system development toward a global assessment, Y. Kanaya, T. Sekiya, H. Takashima, Y. Iwamoto, K. Takeda, F. Taketani, K. Kawana, A. Ooki, SOLAS2022, 2022/09/28, Without Invitation, English, SOLAS South Africa 2022, South Africa
  6. Spatial distribution of iosine in the tropical western North Pacific surface water, Y. Iwamoto, K. Takeda, H. Takashima, F. Taketani, Y. Kanaya, SOLAS2022, 2022/09/28, Without Invitation, English, SOLAS South Africa 2022, South Africa
  7. Seasonal Variation of Phosphate in Atmospheric Aerosols in Higashi-Hiroshima, Y. Iwamoto, M. Hirota, K. Takeda, H. Sakugawa, Japan Geoscience Union 2021, 2021/06/05, Without Invitation, English, Japan Geoscience Union 2021, ONLINE
  8. Measurement of reactive oxygen species (ROS) and fluorescent organic matter in rivers within Hiroshima Prefecture, Japan, A. T. Tolulope, T. Umeda, Y. Iwamoto, K. Takeda, H. Sakugawa, K. M. G. Mostofa, Japan Geoscience Union 2021, 2021/06/05, Without Invitation, English, Japan Geoscience Union 2021, ONLINE
  9. Optical properties of dissolved organic matter in Japanese rivers and their contributions to photo-generation of reactive oxygen species, A. T. Tolulope, Y. Iwamoto, K. Takeda, H. Sakugawa, K. M. G. Mostofa, 2020/11/01, Without Invitation, English, ONLINE
  10. Measurements of reactive oxygen species such as hydroxyl radical, nitric oxide radical and singlet oxygen in some rivers in Japan, A. T. Tolulope, W. A. Jadoon, A. O. Adesina, M. O. Sunday, K. Takeda, H. Sakugawa, 2019/09, Without Invitation, English, Tokyo, Japan
  11. Determination of photochemical formation of nitric oxide in seawater and air-sea exchange in the Seto-Inland Sea, Kazuhiko Takeda, Emmanuel F. Olasehinde, Hiroshi Sakugawa, IUPAC International Congress on Analytical Sciences 2011, 2011/05/25, Without Invitation, English, Kyoto International Conference Center
  12. Aqueous photolysis of the UV filter compounds in natural waters - Role of hydroxyl radical reaction and direct photolysis -, Kazuhko Takeda, Asato Shingu, Tatsushi Sumida, Hiroshi Sakugawa, Pacifichem2010, 2010/12/18, Without Invitation, English, Honolulu, Hawaii, USA
  13. Distribution and Source Estimation of Polycyclic Aromatic Hydrocarbons in the Coastal Sediment Cores from Seto Inland Sea, Japan, H. Tsuji, W. A. Jadoon, Y. Nunome, H. Yamazaki, K. Takeda H. Sakugawa, Asia Oceania Geosciences Society 16th Annual Meeting, Singapore, 2019/07, Without Invitation, English, Singapore
  14. Hydroxyl radical generation with a high power ultraviolet light emitting diode (UV-LED) and application for determination of hydroxyl radical (•OH) reaction rate constants, Kazuhiko Takeda, K. Fujisawa, R. Kato, Asia/CJK symposium on analytical science 2017, 2017/09/10, With Invitation, English, The Japan Society for Analytical Chemistry, Tokyo, Japan

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, 1993, 1993
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  2. KAKENHI, Enhancement on sensitivities and selectivities of absorption and fluorescence spectrometries with combination of various optical effects and application to the natural water analysis., 1993, 1994
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  3. KAKENHI, 1994, 1994
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  4. KAKENHI, 1995, 1995
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  5. KAKENHI, Source and source strength determination of atmospheric organic acids, 1995, 1996
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  6. KAKENHI, Control and detection of molecular dynamics in the diluted magnetic fluid solution under magnetic field., 1996, 1997
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  7. KAKENHI, 1998, 1999
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  8. KAKENHI, The role of marine photochemical reactions in removal of dissolved material in the Yellow Sea, 2001, 2003
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  9. KAKENHI, 2002, 2002
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  10. KAKENHI, Measurement of atmospheric aqueous phase OH radical and the elucidation of its toxic effects on higher plants, 2002, 2004
    Permalink
  11. KAKENHI, A Rapid and High-Sensitive Determination of Low Molecular Weight Carbonyl Compounds in River Water and Seawater and Photochemical Formation Mechanism, 2003, 2005
    Permalink
  12. KAKENHI, 2006, 2008
    Permalink
  13. KAKENHI, Effect of groundwater and seawater interaction on nitrogen dynamics in coastal sediment of inland sea, 2007, 2009
    Permalink
  14. KAKENHI, 2016, 2018
  15. 2019, 2019

Social Activities

History as Peer Reviews of Academic Papers

  1. 2008, Analytical Sciences, Editor
  2. 2009, Analytical Sciences, Editor
  3. 2009, Geochemical Journal, Editor, Associate Editor
  4. 2010, Geochemical Journal, Editor, Associate Editor
  5. 2011, Geochemical Journal, Editor, Associate Editor
  6. 2012, Geochemical Journal, Chief editor, Associate Editor
  7. 2013, Geochemical Journal, Editor, Associate Editor
  8. 2014, Geochemical Journal, Editor, Associate Editor
  9. 2015, Geochemical Journal, Editor, Associate editor
  10. 2016, Geochemical Journal, Editor
  11. 2017, Geochemical Journal, Editor
  12. 2018, Geochemical Journal, Editor