[17p-M_107-1~16] 8.5 Plasma phenomena, emerging area of plasmas and their new applications

6:00 PM - 6:15 PM JST(9:00 AM - 9:15 AM UTC)English Presentation

[17p-M_107-16] Effects of solution conditions on plasma-induced hydrogen peroxide generation
in acidic solutions

〇SIQI DENG¹, Shota Sasaki¹, Toshiro Kaneko¹ (1.Grad. Sch. of Eng., Tohoku Univ.)

Keywords:

gas-liquid interfacial plasma,plasma application

The interaction between non-thermal plasmas and liquids is known to strongly depend on the chemical properties of the liquid phase; however, systematic studies under acidic conditions remain limited. In this work, hydrogen peroxide (H₂O₂) generation induced by plasma contact with aqueous acidic solutions was investigated, with a focus on the effects of solution pH and acid concentration. The results show that H₂O₂ production is significantly enhanced in acidic environments compared with neutral solutions, and its accumulation behavior varies markedly with acid concentration. These observations indicate that liquid-phase acidity plays a critical role in governing plasma–liquid interfacial reactions and the resulting oxidative species formation. The findings provide physicochemical insight into plasma–liquid interaction under acidic conditions and suggest potential relevance to plasma-assisted processes operating in strongly acidic environments, including wastewater treatment and plasma-enabled surface activation or cleaning [1, 2].
[1] J. J. Pignatello, et al., Critical Reviews in Environmental Science and Technology, 36, 1, 1-84, (2006).
[2] L. Qin et al. ACS Sustainable Chem. Eng. 8, 15, 5837–5846 (2020).