Plasma-Activated Tap Water by Gliding Arc Discharge Through Bubbles Using an Inverted Reactor Approach

Author(s)

Filgueira, G. A. ; Pessoa, R. S. ; Yamamoto, R. K. ; Alves Jr, C. ; Sobrinho, A. S. da Silva

• Document type: Journal article
• Source: IEEE TRANSACTIONS ON PLASMA SCIENCE; v. 52, n. 8, p. 9-pg., 2024-10-01.

Abstract

This study employed an inverted reactor approach to activate tap water (TW) using effluent bubbles derived from a gliding arc discharge (GAD). Optical emission spectroscopy (OES) analysis revealed the dominant presence of nitrogen species and oxygen radicals within specified spectral ranges. The physicochemical attributes of the plasma-activated TW (PATW) remained consistent, highlighting the efficacy of the reactor's bubbling system. Through UV-Vis spectrophotometry and pH analysis, the notable observation was the stabilizing influence of hydrogen peroxide (H2O2) and positive hydrogen ions (H+) during the initial activation phases (75 min), which played a significant role in maintaining mildly alkaline pH. Energy efficiency metrics demonstrated a decline up to 1.25 h of activation, with subsequent stabilization. Our research outcomes further emphasize the efficacy of GAD, shedding light on its significant potential in optimizing the water activation process. (AU)

• FAPESP's process: 19/05856-7 - Use of low temperature atmospheric pressure plasma in dentistry: from laboratory bench to clinics
• Grantee: Cristiane Yumi Koga Ito
• Support Opportunities: Research Projects - Thematic Grants