Development of removal and immobilization technology of mercury in flue gas considering its environmental fate

• Project/Area Number: 17H03335
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Civil and environmental engineering
• Research Institution: Kyoto University
• Principal Investigator: Takaoka Masaki 京都大学, 工学研究科, 教授 (80252485)
• Co-Investigator(Kenkyū-buntansha): 塩田 憲司 京都大学, 工学研究科, 技術職員 (50536563) ; 大下 和徹 京都大学, 工学研究科, 准教授 (90346081)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000); Fiscal Year 2019: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2018: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000); Fiscal Year 2017: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
• Keywords: 水銀 / 活性炭 / 排ガス / 吸着 / 脱着 / 廃棄物 / ヨウ素 / 熱処理施設 / 吸脱着 / 環境運命 / 塩化第二水銀 / 下水汚泥焼却 / 挙動

Outline of Final Research Achievements

In this study, to enhance the removal ability of mercury in flue gas by activated carbon, the impregnation of chlorine, sulfur and iodine compounds were examined and the removal mechanism was understood using various X-ray methods. The stability of mercury adsorbed on the activated carbon was evaluated by leaching test and thermal test and the chemical form of the mercury on the activated carbon was discussed. In addition, the mercury behavior in real anthropogenic sources was investigated and the application of activated carbon adsorbent to flue gas in a real plant was evaluated.

Academic Significance and Societal Importance of the Research Achievements

2017年8月に発効した「水銀に関する水俣条約」においては、国連環境計画（UNEP）において大気排出削減ための利用可能な最良の技術／最良の慣行（BAT/BEP）に関する知見や水銀廃棄物の環境上適正な管理が求められており、本成果は活性炭による吸着法とその安全な処分に関する根本的な科学的根拠に対する基礎的な知見となる。また、これまで知見の少なかったヨウ素化合物を添着した際の水銀除去機構を明らかにしたことの学術的意義は大きい。

Research Products

• [Journal Article] Comparison of sewage sludge mono-incinerators: Mass balance and distribution of heavy metals in step grate and fluidized bed incinerators (2020)
  • Author(s): Chen Y., Oleszek, S., Shiota K., Oshita K., Takaoka M
  • Journal Title: Waste Management Volume: 105 Pages: 575-585
  • DOI: 10.1016/j.wasman.2020.02.044
  • Peer Reviewed
• [Journal Article] Mass balance of heavy metals in a non-operational incinerator residue landfill site in Japan (2020)
  • Author(s): Xiong, Y., Takaoka, M., Kusakabe, T., Shiota, K., Oshita, K., Fujimori, T.
  • Journal Title: Journal of Material Cycles and Waste Management Volume: 22 Issue: 2 Pages: 354-364
  • DOI: 10.1007/s10163-020-00976-w
  • Peer Reviewed
• [Journal Article] Mercury behaviour in flue gas from a sewage sludge incinerator and melting furnace (2018)
  • Author(s): Masaki Takaoka, Kazuyuki Oshita Masaharu Okada, Tomoaki Watanabe, Koji Tanida
  • Journal Title: Water Science and Technology Volume: 2017 Issue: 3 Pages: 782-790
  • DOI: 10.2166/wst.2018.268
  • Peer Reviewed
• [Journal Article] 水銀廃棄物処理に関する大気への排出 (2018)
  • Author(s): 高岡昌輝
  • Journal Title: 都市清掃 Volume: 71 Pages: 16-20
• [Presentation] Effect of sewage sludge incinerator type on heavy metals distribution (2020)
  • Author(s): Yingchao Cheng, Sylwia Oleszek, Kenji Shiota, Kazuyuki Oshita, Masaki Takaoka
  • Organizer: The 6th 3R International Scientific Conference on Material Cycles and Waste Management
  • Int'l Joint Research
• [Presentation] Mass Balance of Heavy Metals in One Closed Landfill site for Incinerator Residues in Japan (2019)
  • Author(s): Yiqun Xiong, Taketoshi Kusakabe, Kazuyuki Oshita, Takashi Fujimori, Masaki Takaoka
  • Organizer: The 3R International Scientific Conference on Material Cycles and Waste Managemen
  • Int'l Joint Research
• [Presentation] 階段炉における水銀収支の調査報告 (2018)
  • Author(s): 杉田大智, 水野孝昭, 株丹直樹, 宍田健一, 大下和徹, 高岡昌輝
  • Organizer: 第55回下水道研究発表会講演論文集
• [Presentation] Heavy Metal Speciation Analysis in Two Landfill Sites (2018)
  • Author(s): Xiong, Y, Takaoka, M, Sano, A, Shiota, K, Oshita, K, Fujimori, T
  • Organizer: 27th KAIST-KU-NTU-NUS Symposium
  • Int'l Joint Research
• [Presentation] The behavior of mercury and other heavy metals in sewage sludge mono incinerators (2018)
  • Author(s): Yingchao Cheng, Kazuyuki Oshita, Masaki Takaoka
  • Organizer: IWA Water Congress and Exhibition
  • Int'l Joint Research
• [Presentation] 階段式汚泥焼却炉における水銀収支の調査報告 (2018)
  • Author(s): 杉田大智, 水野孝昭, 株丹直樹, 宍田健一, 程英超, 大下和徹, 高岡昌輝
  • Organizer: 環境システム計測制御学会誌
• [Presentation] 都市ごみ焼却施設の排ガス処理プロセスにおける水銀挙動について (2017)
  • Author(s): 岡田正治、上林史朗、高岡昌輝
  • Organizer: 廃棄物資源循環学会研究発表会
• [Presentation] Mercury behaviour in flue gas from a sewage sludge incinerator and melting furnace (2017)
  • Author(s): Masaki Takaoka, Kazuyuki Oshita, Masaharu Okada, Tomoaki Watanabe, Koji Tanida,
  • Organizer: Sludge Tech
  • Int'l Joint Research
• [Remarks] 他は、すでに研究成果報告書で報告済み。
• [Patent(Industrial Property Rights)] バグフィルタ、添着活性炭素繊維ユニットを再生する方法及び排ガス処理システム (2022)
  • Inventor(s): 鮫島良二、三宅伴憲、吉川正晃、高岡昌輝、日下部武敏
  • Industrial Property Rights Holder: 国立大学京都大学、株式会社プランテック、大阪瓦斯株式会社
  • Industrial Property Rights Type: 特許
  • Acquisition Date: 2022
  • Overseas
• [Patent(Industrial Property Rights)] バグフィルタ、バグフィルタの再生方法及び排ガス処理システム (2019)
  • Inventor(s): 高岡昌輝、日下部武敏、鮫島良二、三宅伴憲、吉川正晃
  • Industrial Property Rights Holder: 高岡昌輝、日下部武敏、鮫島良二、三宅伴憲、吉川正晃
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2019-216504
  • Filing Date: 2019