Development of air purification method using vacuum ultraviolet rays and ultrasonic waves regardless of the state and properties of air pollutants

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H04361
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 64020:Environmental load reduction and remediation-related
• Research Institution: Saitama University
• Principal Investigator: Sekiguchi Kazuhiko 埼玉大学, 理工学研究科, 教授 (50312921)
• Co-Investigator(Kenkyū-buntansha): 二井 晋 鹿児島大学, 理工学域工学系, 教授 (90262865) ; 三小田 憲史 富山県立大学, 工学部, 助教 (80742064)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 真空紫外線 / VOCガス / オイルミスト / 分解無機化 / 分解生成物 / 物質収支 / オゾン / 反応活性ミスト

Outline of Final Research Achievements

In this study, using an excimer lamp, which is a vacuum ultraviolet light source that is free from mercury, and ultrasonic waves, we have experimentally proved that highly efficient decomposition of VOC gas, successful capturing and decomposition of oil mist. In addition, we confirmed the species and amount of degradation products, and the generation of reactive mist by ultrasonic waves. It was demonstrated that the full capture of degradation products by their mist, and complete decomposition and mineralization of degradation products in water by ultrasonic wave. As a result, a highly efficient air purification method was proposed, which enables to capture degradation products regardless of the state and properties of air pollutants.

Free Research Field

環境化学、エアロゾル科学（大気汚染評価ならびに環境浄化技術開発）

Academic Significance and Societal Importance of the Research Achievements

屋内の有害大気汚染物質には、揮発性有機化合物ガスやオイルミストなどの有機粒子がある。本研究では、水銀を含まないエキシマランプから照射される真空紫外線や超音波から発生する反応活性ミストを用いて、これらガス状、粒子状といった状態や物性によらない有害汚染物質の高効率分解に加え、分解生成物の捕捉や完全無害化も可能な新たな空気浄化手法を提案しており、エキシマランプや超音波の新たな利用分野の開拓も期待される。