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Kawaguchi, Kohei
Graduate School of Global Environmental Studies (GSGES) Program-Specific Assistant Professor
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Last Updated :2025/11/27
Basic Information
Email Address
Email Address
kawaguchi.kohei.6k
kyoto-u.ac.jp
Professional Memberships
Academic Degree
Academic Resume (Undergraduate School/Majors)
Research History
- From Apr. 2023, To Present京都大学大学院地球環境学堂 特定助教
- From Oct. 2021, To Mar. 2023京都大学大学院教育支援機構奨励研究員
- From Nov. 2018, To May 2019株式会社あってぃら, 取締役
- From May 2018, To Nov. 2018株式会社あってぃら
Profile
Profile
浄水、下水、海水などのあらゆる水の酸化処理の研究をしています。
運営に携わっている国際シンポジウム（12月2日開催、インドネシア+Zoom、参加費無料）の参加者を熱烈募集中です：https://www2.eip.ges.kyoto-u.ac.jp/symposium/
英語論文に関しては、KURENAI・ResearchGate・SSRNのいずれかでプレプリントを無料公開しています。
ID,URL
ORCID ID
J-Global ID
Researcher number
30985502
researchmap URL
list
Last Updated :2025/11/27
Research
Research Topics, Overview of the research
Research Topics
Development of a method for selective determination of oxidising agents in the presence of a wide variety of coexisting substances such as sewage.
Development of ozone treatment control methods that follow fluctuations in influent water quality.Overview of the research
My research focuses on chemical water quality engineering, in particular on water purification with ozone, for all types of water, including drinking water, sewage and seawater. Ozone can purify water more powerfully than chlorine, which is widely used, while producing fewer undesirable substances (by-products), and is a treatment method that is expected to spread further in Japan. I am conducting both basic research, such as the development of water quality analysis methods, and applied research, such as the development of control methods in actual treatment plants.
Research Interests
Research Areas
- Environmental science/Agricultural science, Environmental load reduction/restoration technology
- Social infrastructure (civil Engineering, architecture, disaster prevention), Civil engineering (environmental systems)
Papers
- Inefficiency of Dissolved Ozone-Granular Activated Carbon Contact for Hydroxyl Radical Reactions in Drinking Water TreatmentKohei KawaguchiSSRN, Aug. 2025, Lead author, Corresponding author
- An ozone consumption model with two second-order reactions: extending the initial ozone demand/pseudo-first-order modelKohei Kawaguchi; Taira Hidaka; Fumitake NishimuraSSRN, Jul. 2025, Lead author, Corresponding author
- Development of a Selective and Sensitive Measurement Method for Permanganate and its First Quantification Under Actual Ozonation ConditionsKohei Kawaguchi; Taira Hidaka; Taku FujiwaraChemosphere, Oct. 2025, Peer-reviewed, Lead author, Corresponding author
- A more selective and accurate method than indigo method for measuring dissolved ozone concentration (p-vinylbenzoic acid method)Kohei Kawaguchi; Taira Hidaka; Taku FujiwaraWater Research, Mar. 2023, Peer-reviewed, Lead author
- Linear Relationship between Temperature and the Apparent Reaction Rate Constant of Hydroxyl Radical with 4-chlorobenzoic AcidKohei Kawaguchi; Taira Hidaka; Fumitake NishimuraOZONE-SCIENCE & ENGINEERING, May 2022, Peer-reviewed, Lead author, Corresponding author
- Report of Trekking to MasaGang and Jomolhari in 2015: Commemoration of 30th Anniversary of the First Ascent of Mt. MasaGang in 1985 by Kyoto University Alpine Club六車 光貴; 原 宏輔; 川口 康平; 青木 俊輔; 秋本 克規; 酒井 英人; 山下 耕; 外園 喜大; 荻原 宏章; 河合 清定ヒマラヤ学誌 : Himalayan Study Monographs, 28 Mar. 2016, Peer-reviewed
Misc.
Presentations
- 浄水オゾン処理中の過マンガン酸イオン濃度の世界初の定量川口康平; 日髙平; 藤原拓特定非営利活動法人 日本オゾン協会 第34回年次研究講演会, Jun. 2025
- 淀川流域下水オゾン処理場における定期調査とリアルタイム水質を用いた省エネルギーな制御法の開発川口康平; 山部海令和6年度水質保全研究助成成果報告会, Mar. 2025
- 実規模嫌気好気活性汚泥法におけるN₂O 排出特性の長期評価と発生機構の推定李 婷; 藤原 拓; 足立 響; 周 心怡; 木庭 啓介; 小野 誠仁; 日高 平; 野村 洋平; 川口 康平; 江藤 慎太郎; 金海 秀紀第59回日本水環境学会年会, Mar. 2025
- 下水処理に用いるフォトグラニュールの炭素固定特性に及ぼす無機炭素濃度の影響北川裕介; 日髙平; 川口康平; 野村洋平; 藤原拓; Chul Park第61回下水道研究発表会, Aug. 2024
- 高精度かつ共存物質の干渉を受けにくい新たな溶存オゾン濃度測定法：ρ-ビニル安息香酸法川口康平; 日髙平; 藤原拓日本オゾン協会第33回年次研究講演会, Jun. 2024
- 共存酸化剤存在時に使用可能な過マンガン酸の測定方法の開発川口康平; 日高平; 藤原拓第58回日本水環境学会年会, Mar. 2024
- Introduction to Japan's Water and Wastewater Systems and Recent Research Trends for Future Research CollaborationsKohei KawaguchiThe 7th Kyoto University – Mahidol University on-site laboratory workshop, Feb. 2024
- New method for measuring dissolved ozone concentration using p-vinylbenzoic acidKohei Kawaguchi; Taira Hidaka; Taku FujiwaraKyoto University ‐ Mahidol University on‐site laboratory workshop, Mar. 2023
- インジゴ法よりも高精度な溶存オゾン濃度測定方法の開発川口 康平, 日高 平, 藤原 拓公益社団法人 日本水環境学会年会, Mar. 2023
- ヒドロキシルラジカルの反応速度定数における温度依存性の測定方法の開発川口康平; 日高平; 西村文武特定非営利活動法人 日本オゾン協会 第30回年次研究講演会, Nov. 2021
- ヒドロキシルラジカル反応を含むオゾン処理再現モデルの構築川口 康平; 楠田; 育成; 日高; 平; 西村; 文武; 水野 忠雄公益社団法人 日本水環境学会年会, Mar. 2020
- A Performance Prediction Method of Ozonation for the Design of a Typical Ozone Contactor in JapanKawaguchi Kohei; Mizuno Tadao; Nishimura FumitakeKyoto University International Symposium on Education and Research in Global Environmental Studies in Asia, Nov. 2019
- オゾン、HOラジカル反応を考慮したオゾン処理槽モデルの構築川口康平; 水野忠雄; 西村文武特定非営利活動法人 日本オゾン協会 第28回年次研究講演会, Jun. 2019
Awards
External funds: Kakenhi
- Elucidation of the Mechanism of Seawater Ozonation and Comparison with ChlorinationGrant-in-Aid for Research Activity Start-up0303:Civil engineering, social systems engineering, safety engineering, disaster prevention engineering, and related fieldsKyoto University川口 康平From 31 Aug. 2023, To 31 Mar. 2025, Grantedオゾン;臭化物イオン;水処理;消毒;汚染物質;副生成物;次亜臭素酸
