Takehiko Gotoh

Last Updated :2025/06/16

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
E-mail
tgotohiroshima-u.ac.jp
Self-introduction
I belong to the Chemical Engineering Program and am studying polymer gels. My previous job was a petrochemical plant engineer. When I was a student, I was researching immobilized culture of animal cells in polymer gels. Polymer gel is a substance that has both liquid and solid properties, and its unique properties can be applied to various fields such as reaction, separation, storage, and energy conversion. Although the polymer gels are studied in all over the world, only simple properties such as water absorption and water retention have been utilized industrially. Therefore, I am researching the utilization of the unique physical and chemical properties of polymer gels such as environmental purification and substance production methods.

Basic Information

Academic Degrees

  • Doctor of Engineering, Tokyo Institute of Technology
  • Master of Engineering, Tokyo Institute of Technology

Educational Activity

  • [Bachelor Degree Program] School of Engineering : Cluster 3(Applied Chemistry, Biotechnology and Chemical Engineering) : Program of Chemical Engineering
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Chemical Engineering Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Chemical Engineering Program

Research Fields

  • Engineering;Process / Chemical engineering;Properties in chemical engineering process / Transfer operation / Unit operation

Research Keywords

  • functional polymer
  • polymergel
  • environmental responsive
  • phase-transition
  • kinetics
  • rheology
  • adsorption
  • Gel
  • polymer

Affiliated Academic Societies

  • Society of Environmental Science, Japan
  • American Chemical Society
  • Japan Society on Water Environment
  • The Society of Chemical Engineers, Japan
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  • The Japan Petroleum Institute
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  • The Society of Polymer Science, Japan
  • The Japan Society on Adsorption
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Educational Activity

Course in Charge

  1. 2025, Undergraduate Education, 4Term, Technical English
  2. 2025, Undergraduate Education, Second Semester, Basic Experiments in Chemistry
  3. 2025, Undergraduate Education, Second Semester, Chemical Engineering Exercise I
  4. 2025, Undergraduate Education, Year, Graduation Thesis
  5. 2025, Graduate Education (Master's Program) , 3Term, Special Exercises on Chemical Engineering B
  6. 2025, Graduate Education (Master's Program) , 4Term, Special Exercises on Chemical Engineering B
  7. 2025, Graduate Education (Master's Program) , Year, Special Study on Chemical Engineering
  8. 2025, Graduate Education (Master's Program) , Year, Special Study on Chemical Engineering
  9. 2025, Graduate Education (Master's Program) , 3Term, Advanced Chemical Plant Engineering and Construction

Research Activities

Academic Papers

  1. Radiation resistance and saturated adsorption capacity of a superabsorbent polymer and anion-supporting hydrogel for the safe storage of treated water, Journal of Radioanalytical and Nuclear Chemistry, 20240510
    Link to Paper Search Results by DOI
  2. Controlling organic carbon increase in oxygenated marine sediment by using decarburization slag, JOURNAL OF ENVIRONMENTAL MANAGEMENT, 358, 120820, 20240410
    Link to Paper Search Results by DOI
  3. ★, Functional Hydrogels Promote Vegetable Growth in Cadmium-Contaminated Soil, GELS, 10(5), 348, 20240520
    Link to Paper Search Results by DOI
  4. ★, Simultaneous Removal of Anionic and Cationic Species by Ionic Hydrogels via Positively Charged Complex: Adsorption Mechanism of Arsenic(V) and Chromium(III) in Highly Acidic System, ACS ES&T WATER, 4(5), 2005-2017, 20240401
    Link to Paper Search Results by DOI
  5. Application of Eco-Feed Produced by Aurantiochytrium sp. L3W Using Solid Food Waste for Producing Hirodai-dori Products Containing Omega-3 Fatty Acids, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 57(1), 20240415
    Link to Paper Search Results by DOI
  6. ★, Dual Benefits of Hydrogel Remediation of Cadmium-Contaminated Water or Soil and Promotion of Vegetable Growth under Cadmium Stress, PLANTS-BASEL, 12(24), 4115, 20231208
    Link to Paper Search Results by DOI
  7. Application of an eco-feed produced by culturing Aurantiochytrium sp. strain L3W using solid food waste to produce poultry products enriched with ﾏ‰-3 fatty acids, JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT, 25(6), 3346-3354, 20230806
    Link to Paper Search Results by DOI
  8. Valorization of Solid Food Waste as a Source of Polyunsaturated Fatty Acids Using Aurantiochytrium sp. L3W, WASTE AND BIOMASS VALORIZATION, 14(9), 2945-2956, 20230901
    Link to Paper Search Results by DOI
  9. ★, A Novel Composite Hydrogel Material for Sodium Removal and Potassium Provision, POLYMERS, 15(17), 20230828
    Link to Paper Search Results by DOI
  10. ★, Hexavalent Chromium Removal by an Ascorbic Acid Functionalized Polymer Hydrogel Adsorbent: the Effect of Physicochemical Factors, ACS APPLIED POLYMER MATERIALS, 5(3), 2105-2112, 20230214
    Link to Paper Search Results by DOI
  11. Utilization of saline and viscous food-processing liquid waste for cultivation of thraustochytrid for production of polyunsaturated fatty acids, Clean Technologies and Environmental Policy, 20220622
    Link to Paper Search Results by DOI
  12. The Removal of Hydrophobic Matter from Thermosensitive Poly[oligo(ethylene glycol) Monomethyl Ether Acrylate] Gel Adsorbent in Alcohol-Water Mixtures, GELS, 8(4), 1-11, 20220323
    Link to Paper Search Results by DOI
  13. ★, Removal of Acetic Acid from Bacterial Culture Media by Adsorption onto a Two-Component Composite Polymer Gel, GELS, 8(3), 1-11, 20220302
    Link to Paper Search Results by DOI
  14. Simultaneous Removal of Arsenic and Manganese from Synthetic Aqueous Solutions Using Polymer Gel Composites, NANOMATERIALS, 11(1032), 1-12, 20210418
    Link to Paper Search Results by DOI
  15. ★, Synthesis and Characterization of a Novel Heteropoly Acid/Hydrogel Composite, MATEC Web of Conferences, 333(11005), 1-5, 20210108
    Link to Paper Search Results by DOI
  16. Properties of Zwitterionic Sulfobetaine Gels Containing Different Numbers of Methylene Units, MATEC Web of Conferences, 333(01002), 1-6, 20210108
    Link to Paper Search Results by DOI
  17. ★, Simultaneous Adsorption of Cation and Anion by Thermosensitive Hydrogels, MATEC Web of Conferences, 333(11007), 1-6, 20210108
    Link to Paper Search Results by DOI
  18. ★, Poly(triethylene glycol methyl ether methacrylate) hydrogel as a carrier of phosphotungstic acid for acid catalytic reaction in water, MATERIALS ADVANCES, 2(11), 3556-3559, 20210607
    Link to Paper Search Results by DOI
  19. Increase in sedimentary organic carbon with a change from hypoxic to oxic conditions, MARINE POLLUTION BULLETIN, 168(112397), 1-10, 20210504
    Link to Paper Search Results by DOI
  20. ★, Synthesis of Oxidant Functionalised Cationic Polymer Hydrogel for Enhanced Removal of Arsenic (III), GELS, 7(197), 1-13, 20211114
    Link to Paper Search Results by DOI
  21. ★, Novel Thermosensitive-co-Zwitterionic Sulfobetaine Gels for Metal Ion Removal: Synthesis and Characterization, GELS, 7(4), 1-16, 20211207
    Link to Paper Search Results by DOI
  22. ★, Recovery of Rare Earths using Anion-Supporting Polymer Gel, Kagaku Kogaku Ronbunshu, 47(5), 161-168, 20210920
  23. Removal of Manganese Using Polymer Gel Composites, Materials Proceedings, 4(68), 1-7, 20201120
    Link to Paper Search Results by DOI
  24. Correlating properties between sulfobetaine hydrogels and polymers with different carbon spacer lengths, POLYMER, 186, 20200109
    Link to Paper Search Results by DOI
  25. The Effect of Synthesis Condition of the Ability of Swelling, Adsorption, and Desorption of Zwitterionic Sulfobetaine-Based Gel, INTERNATIONAL JOURNAL OF TECHNOLOGY, 11(2), 299-309, 20200421
    Link to Paper Search Results by DOI
  26. Application of Aurantiochytrium sp. L3W for food-processing wastewater treatment in combination with polyunsaturated fatty acids production for fish aquaculture, SCIENCE OF THE TOTAL ENVIRONMENT, 743, 20201115
    Link to Paper Search Results by DOI
  27. Effect of Plastics on the Photodegradation Behavior of Chlorophenols, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 53(10), 660-666, 202010
    Link to Paper Search Results by DOI
  28. Degradation of secondary polyamide reverse osmosis membrane by hypochlorite in the presence of calcium ions, POLYMER DEGRADATION AND STABILITY, 181, 202011
    Link to Paper Search Results by DOI
  29. ★, Synthesis, Phase-Transition Behaviour, and Oil Adsorption Performance of Porous Poly(oligo(ethylene glycol) Alkyl Ether Acrylate) Gels, Polymers, 12, 1405
  30. Development and regeneration of composite of cationic gel and iron hydroxide for adsorbing arsenic from ground water, Chemosphere, 217, 808-815, 20190201
    Link to Paper Search Results by DOI
  31. THE EFFECT OF CATION AND ANION SPECIES ON THE TRANSITION AND ADSORPTION BEHAVIORS OF THERMOSENSITIVE SULFOBETAINE GEL-BASED ADSORBENT, INTERNATIONAL JOURNAL OF TECHNOLOGY, 10(3), 443-452, 20190524
    Link to Paper Search Results by DOI
  32. Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide, JOVE-JOURNAL OF VISUALIZED EXPERIMENTS, 201906
    Link to Paper Search Results by DOI
  33. Influence of Hydrophobicity of Backbone Polymer in Thermo-Responsive Hydrogel with Immobilized Amine on Cycle Capacity for Absorption and Recovery of CO2, POLYMERS, 11(6), 2019
  34. Deterioration Mechanism of a Tertiary Polyamide Reverse Osmosis Membrane by Hypochlorite, ENVIRONMENTAL SCIENCE & TECHNOLOGY, 53(15), 9109-9117, 20190806
    Link to Paper Search Results by DOI
  35. The effect of gamma-FeOOH on enhancing arsenic adsorption from groundwater with DMAPAAQ plus FeOOH gel composite, SCIENTIFIC REPORTS, 9, 20190815
    Link to Paper Search Results by DOI
  36. ★, Selective Recovery of Metal Ion by Using Hydrogel With Different Inner pH, Macromolecular Symposia, 385(1), 163-168, 20190607
  37. The Effect of Cation And Anion Species on the Transition and Adsorption Behaviors of Thermosensitive Sulfobetaine Gel-Based Adsorbent, International Journal of Technology, 10(3), 443-452, 2019
  38. Influence of Hydrophobicity of Backbone Polymer in Thermo-Responsive Hydrogel with Immobilized Amine on Cycle Capacity for Absorption and Recovery of CO2, Polymers, 11(6), 1024, 2019
  39. ★, Metal Hydroxide Formation in DMAPAA Hydrogel and Novel Metal Ion Removal Method, KAGAKU KOGAKU RONBUNSHU, 43(4), 199-206, 20170710
    Link to Paper Search Results by DOI
  40. ★, Novel Metal Ion Removal Method Using Protonated Hydrogel, Macromolecular Symposia, 372(1), 120-126, 201708
    Link to Paper Search Results by DOI
  41. Effects of specific anions on the relationship between the ion-adsorption properties of sulfobetaine gel and its swelling behavior, POLYMER, 59, 144-154, 20150224
    Link to Paper Search Results by DOI
  42. Investigation of ion adsorption properties of sulfobetaine gel and relationship with its swelling behavior, POLYMER, 55(20), 5189-5197, 20140926
    Link to Paper Search Results by DOI
  43. Investigation of ion adsorption properties of sulfobetaine gel and relationship with its swelling behavior, POLYMER, 55(20), 5189-5197, 2014
  44. Consolidation of suspended particles by using dual ionic thermosensitive polymers with incorporated a hydrophobic component, SEPARATION AND PURIFICATION TECHNOLOGY, 106, 90-96, 20130314
    Link to Paper Search Results by DOI
  45. Adsorption and desorption of calcium ions by temperature swing with copolymer of thermosensitive and chelating components grafted on porous ethylene vinyl acetate disk, REACTIVE & FUNCTIONAL POLYMERS, 73(12), 1632-1638, 201312
    Link to Paper Search Results by DOI
  46. Consolidation of suspended particles by using dual ionic thermosensitive polymers with incorporated a hydrophobic component, SEPARATION AND PURIFICATION TECHNOLOGY, 106, 90-96, 2013
  47. Synthesis of porous poly[oligo(ethylene glycol) methyl ether methacrylate] gels that exhibit thermosensitivity in highly concentrated aqueous NaCl solution, POLYMER, 53(16), 3417-3420, 20120719
    Link to Paper Search Results by DOI
  48. ★, Novel pH-thermosensitive Gel Adsorbents for Phosphoric Acid,, Mater. Res. Sym. Proc, 1134, 5-7, 20090101
  49. Control of Transition Temperature of Thermosensitive Porous Gel and Its Application for Dewatering Organic Slurry, KOBUNSHI RONBUNSHU, 65(12), 739-744, 2008
  50. ★, Dewatering of Organic Slurry Using Reinforced Thermosensitive Poroous Gels -Effect of preparation conditions on the dewatering performance of the gel-, polymer bulletin, 58, 213-223, 20070101
  51. Synthesis of nonporous poly(N-alkylacrylamide) gel beads by nonaqueous sedimentation polymerization, POLYMER JOURNAL, 39(1), 18-20, 2007
    Link to Paper Search Results by DOI
  52. Dewatering of organic slurries using reinforced thermosensitive porous gels, POLYMER BULLETIN, 58(1), 213-223, 200701
    Link to Paper Search Results by DOI
  53. Synthesis of porous poly(N-isopropylacrylamide) gel beads by sedimentation polymerization and their morphology, JOURNAL OF APPLIED POLYMER SCIENCE, 104(2), 842-850, 20070415
    Link to Paper Search Results by DOI
  54. Synthesis of nonporous poly(N-alkylacrylamide) gel beads by nonaqueous sedimentation polymerization, POLYMER JOURNAL, 39(1), 18-20, 2007
  55. ★, Dewatering of Organic Slurry Using Thermosensitive Porous Gel, Journal of Chemical Engineering of Japan, 37, 347-352, 20040601
  56. Preparation of molecular imprinted thermosensitive gel adsorbents and adsortion/desorption properties of heavy metal ions by temperature swing, Journal of Chemical Engineering of Japan, 37(1), 59-66, 20040101
  57. Dewartering of organic slurry using thermosensitive porous gel, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 37(2), 347-352, 200402
    Link to Paper Search Results by DOI
  58. Measurements of mechanical properties on a swollen hydrogel by a tension test method, POLYMER JOURNAL, 36(1), 59-+, 2004
    Link to Paper Search Results by DOI
  59. Characterization and swelling behavior of thermosensitive porous gel, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 37(5), 597-603, 200412
    Link to Paper Search Results by DOI
  60. Synthesis of porous poly(N-isopropylacrylamide) gel beads by sedimentation polymerization, POLYMER JOURNAL, 36(4), 356-360, 2004
    Link to Paper Search Results by DOI
  61. Dewatering of Organic Sludge Using Reinforced Thermosensitive Porous Gel, GelSympo 2003, 5, 29, 20031101
  62. The application of thermosensitive porousgel for dewatering of oranic sludge, Korea-Japan Symposium on Materials, 14, 20030501
  63. The Dewatering of Organic Sludge by Using Thermosensitive Porous Gel, 9th APCChE Congress and CHEMECA 2002, 415, 20020901
  64. Control of the Structure of thermosensitive porous gels, Proceedings of the society of chemical engineers= Japan, 66, 454, 20010401
  65. Control of the phase transition temperature of the thermosensitive gel, Proceedings of the society of chemical engineers= Japan, 65, O-320, 20000401
  66. Control of the structure of thermosensitive porous gels-the stepwise temperture control method-, Proceedings of the society of chemical engineers= Japan, 33, 53, 20000401
  67. Structure control of thermosensitive porous gels with hydrophobic long side chains and their thermoresponsive properties, KOBUNSHI RONBUNSHU, 57(11), 722-729, 2000
    Link to Paper Search Results by DOI
  68. The relation between porous structure and swelling behavior of the thermo-sensitive porous gel, Proceedings of the society of chemical engineers= Japan, 32(1), V106, 19990401
  69. Control of the structure of thermo-sensitive porous gel and its swelling kinetics, Proceedings of the society of polymer science= Japan, 10(1), 35, 19990401
  70. Novel Synthesis of Thermosensitive Porons Hydrogels, Journal of Applied Polymer Science, 69, 895-906, 19980401
  71. Newly developed thermoresponsive porons gels and its application to dewatering process, Recent Research Development in Macromolecules Research, 3(1), 77-87, 19980401
  72. Synthesis of Thermo-Sensitive Porons Gels-The effect of synthesis conditions on the swelling and shrinking properties-, Preprints of 37th International Symposium on Macromolecules, 499, 19980401
  73. Structure and sensitivity of thermo-sensitive porous gel, Proceedings of the society of chemical engineers= Japan, 31(3), 141, 19980401
  74. Novel method for preparation of thermo-sensitive porous gel, Proceedings of the society of chemical engineers= Japan, 62(1), 220, 19970401
  75. Porous Thermo-sensitive Gel, "Simple method for preparation of industrial separation medium", Polymer applications, 46(12), 26, 19971201
  76. Novel Synthesis of Thermo-sensitive Porous Gels and Their Swelling Properties, Polymer preprints= Japan, 46(3), 391, 19970401
  77. The effects of synthesis conditions on the swelling property of porous thermo-sensitivegel, Proceedings of the society of chemical engineers= Japan, 30(1), 215, 19970401
  78. A Novel Synthesis of Porous Thermo-sensitive Hydrogels, IUMRS-ICA-97, 148, 19970901
  79. Mass-Production of Biocatalyst-Entrapping Algtnate Gel Particles by a Forced Oscillation Method, Chemical Engineering Communications, 120, 73-84, 19930401
  80. Analysis of the process of the capture of animal cells into the porous carriers, Proceedings of the society of chemical engineers= Japan, 58(3), 14, 19930401
  81. A New Type Porous Carrier and Its Application to Culture of Anchorage-Independent Animall Cell, Cytotechnology, 11, 35-40, 19930401
  82. Growth of Archorage-Independent Animal Cells in Newly Developed Porous Microcarriers, 350-352, 19920401
  83. Culture of anchorage-independent animal cell with porous calcium alginate carrier, Proceedings of the society of chemical engineers= Japan, 57(3), 187, 19920401
  84. Forced break up of a Power-lan fluid jet discharged from an orifice, Journal of Chemical Engineering of Japan, 24(6), 799-801, 19911201
  85. Characteristics of piezo-electric vibration and its application for production of polymer beads carrier, Chmical Engineering Symposium Series, 25, 67-71, 19910201
  86. Preparation of calcium alginate porous carriers and its application to animal cell culture, Polymer preprints= Japan, 40(11), 4153, 19910401
  87. Synthesis of Porous Polymers Utilizing Crystallization of Hydrophobic Long Alkyl Side Chains, 55(3), 137-144, 19980325
  88. Structure Control of thermosensitive Porous Gels with Hydrophobic Long Side Chains and Their thermoresponsive Properties, KOBUNSHI RONBUNSHU, 57(11), 722-729, 20001125
  89. Effects of Synthesis Conditions on Formation of Thermosensitive Porous Gels and Swelling/Shrinking Properties, 59(1), 44-50, 20020125
  90. Measurements of Mechanical Properties on a Swollen Hydrogel by a Tension Test Method, Polymer Journal, 36(1), 59-63, 20040115
  91. Synthesis of Porous Poly(N-isopropylacrylamide) Gel Beads by Sedimentation Polymerization, Polymer Journal, 36(4), 356-360, 20040415
  92. Dewartering of Organic Slurry Using Thermosensitive Porous Gel, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 37(2), 347-352, 20040201
  93. Characterization and Swelling Behavior of Thermosensitive Porous Gel, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 37(5), 597-603, 20040501
  94. Synthesis of Nonporous Poly(N-alkylacrylamide) Gel Beads by Nonaqueous Sedimentation Polymerization, Polymer journal, 39(1), 18-20, 20070115
  95. Control of Transition Temperature of Thermosensitive Porous Gel and Its Application for Dewatering Organic Slurry, 65(12), 739-744, 20081225
  96. 3F09 Attempts toward to improvement in students' report writing and contents-learning in a laboratory class : A case study in the basic chemical laboratory in Cluster III, Faculty of Engineering, Hiroshima University, Proceedings of Annual Conference of Japanese Society for Engineering Education, 2014(0), 542-543, 2014
  97. Preparation of Molecular Imprinted Thermosensitive Gel Adsorbents and Adsorption/Desorption Properties of Heavy Metal Ions by Temperature Swing, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 37(1), 59-66, 20040101
  98. Effects of Synthesis Conditions on Formation of Thermosensitive Porous Gels and Swelling/Shrinking Properties., KOBUNSHI RONBUNSHU, 59(1), 44-50, 2002
  99. Synthesis of Porous Polymers Utilizing Crystallization of Hydrophobic Long Alkyl Side Chains., KOBUNSHI RONBUNSHU, 55(3), 137-144, 1998
  100. Measurements of Mechanical Properties on a Swollen Hydrogel by a Tension Test Method, Polymer Journal, 36(1), 59-63, 2004
  101. Synthesis of Porous Poly(N-isopropylacrylamide) Gel Beads by Sedimentation Polymerization, Polymer Journal, 36(4), 356-360, 2004
  102. Metal Hydroxide Formation in DMAPAA Hydrogel and Novel Metal Ion Removal Method, KAGAKU KOGAKU RONBUNSHU, 43(4), 199-206, 2017
  103. Development of oil separation and recovery system from O/W mixed water using thermosensitive gels, Proceeding of Annual/Fall Meetings of the Japan Petroleum Institute, 2017(0), 2017
  104. Evaluation and application of thermosensitivity characteristics of Oligo (ethylene glycol) monomethyl ether (meth)acrylate, Proceeding of Annual/Fall Meetings of the Japan Petroleum Institute, 2017(0), 2017

Invited Lecture, Oral Presentation, Poster Presentation

  1. Polyoxometalate hydrogel composite as solid acid catalyst in water, Takehiko Gotoh, JunJie Zhu, Ryota Urabayashi, Masahiro Sadakane, Satoshi Nakai, The 13th SPSJ International Polymer Conference (IPC 2023), 2023/07/18, Without Invitation, English, The Society of Polymer Science, Japan, SAPPORO, The Keggin-type phosphotungstic acid H3PW12O40 (PTA) has high levels of acidity and thermal stability, that makes it widely used as a solid catalyst in gas phase or as a homogeneous catalyst in liquid phase. Unfortunately, PTA readily dissolve in polar solvents, rendering it less useful as homogeneous catalyst. In this research, a novel technique is proposed to synthesize a heteropoly acid supported composite and its stability as a catalyst was also tested.
    Related URL
  2. Selective Recovery of Metal Ions using Ionic Polymer Gel, Takehiko Gotoh, The 35th Ion Exchange Seminar, 2023/07/07, With Invitation, Japanese, Japan Society of Ion Exchange, Tokyo, In this study, we proposed a new separation and recovery method for accumulating metal ions as hydroxides inside the gel from a heavy metal solution by utilizing the property of a polymer gel having a tertiary amine in the side chain to generate hydroxide ions (OH-) when it swells in water and keeps the inside basic. It was possible to separate and recover heavy metal ions as hydroxides by performing a reaction in which metal ions react with OH- in a high pH solution to form poorly soluble metal hydroxides in a polymer gel. In addition, by using a gel having a quaternary amine in the side chain and supporting the target metal ion and an anion forming a poorly soluble salt in the protonated amino group, it was clarified that a specific metal can be selectively recovered from the mixed aqueous solution by the difference in the solubility product of each salt. It was also shown that the used gel can be reused without eluting the recovered metal by supporting the anion again.
  3. Assessing the removal of arsenic and boron from geothermal wastewaters with the use of an adsorbent hydrogel, Mentari MUKTI, Barbara TOMASZEWSKA, Eva Oktavia Ningrum, Jochen Bundschuh, Takehiko Gotoh, European Geothermal Congress 2022, 2022/10/17, Without Invitation, English, EUROPEAN GEOTHERMAL ENERGY COUNCIL, Berlin, Germany, published
    Related URL, Attached File's URL
  4. Recovery of Rare-Earth Elements from Industrial Wastewater by Ionic Gel, Takehiko Gotoh, 14th Japan-Korea Symposium on Materials and Interfaces, 2022/11/03, With Invitation, English, Society of Chemical Engineers, Japan, Kanazawa
  5. Removal of Manganese using Polymer gel composites, Syed Ragib Safi, Takehiko Gotoh, 2nd International Online Conference on Nanomateials, 2020/11/15, Without Invitation, English
  6. Cultivation of Aurantiochytrium sp. L3W Using Organic Waste for Polyunsaturated Fatty Acids Production, Megumi FURUTA, Satoshi NAKAI, Takehiko GOTOH, Yuya MAEDA, Humaidah NURLAILI, Wataru NISHIJIMA, Water and Environment Technology Conference 2018, 2018/07/14, Without Invitation, English
  7. Preparation of Composite of Cationic Gel and Iron Hydroxide for Adsorbing Arsenic from Ground Water, Takehiko Gotoh, Safi Sayed Ragib, Satoshi Nakai, 7th IWA-ASPIRE Conference 2017, 2017/09/11, Without Invitation, English, International Water Association, Kuala Lumpur, Malaysia
  8. Preparation of Composite of Cationic gel and Iron Hydroxide for Adsorbing Arsenic, Safi Syed Ragib, 2017/05/26, Without Invitation, English
  9. Selective Metal Ion Recovery from Waste Water by Using Hydrogel with Tertiary Amino Group, Takehiko. Gotoh, Masahide Sano, Asuka, Ogawa and Satoshi Nakai, IWA-ASPIRE Conference 2017, Without Invitation, English, International Water Association, Kuala Lumpur, New metal ion recovery method with hydrogels as a reaction and separation media has been investigated. Hydrogels based on copolymers of 2-(Dimethylamino)ethyl methacrylate, N-3-(Dimethylamino)propyl acrylamide and N,N-dimethylacrylamide were prepared. Diethyleneglycol dimethacrylate was used as a crosslinker. The hydrogel with tertiary amino group exhibited high pH value inside of them when they swelled in water because the tertiary amino group was protonated by water and produced hydroxide ion was retained in the hydrogel. When the hydrogel was immersed in the metal ion aqueous solution, the metal ion diffused into the hydrogels to produce metal hydroxide in the hydrogel. The metal hydroxide within hydrogel was easily separated from the solution. The recovery amount of the metal in the hydrogel was increased with the concentration of the metal ions in the solution. The pH value of the hydrogel could be controlled by the concentration monomers at the preparation. The selective recovery of a certain metal ion from the mixed metal ion solution was attained by controlling the pH value of the hydrogel. The results obtained here suggest the possibilities of the novel metal ion recovery method replacing the coagulation and/or adsorption methods.

Awards

  1. 2005/07, IUPAC Poster Prize, Dewatering of Organic Slurries Using Reinforced Thermosensitive Porous Gels
  2. 2016/06/22, Best Poster, Polymer Networks Group, New Metal Ion Recovery Method Using Protonated Hydrogel
  3. 2015/02/01, Outstanding Reviewer, Elsevier Limited

Patented

  1. Patent
  2. Patent
  3. Patent, 7495276, 2024/05/28
  4. Patent, 7465545, 2024/04/03

External Funds

Acceptance Results of Competitive Funds

  1. 2018/08/01, 2019/03/31
  2. 2019/06/01, 2020/03/31