Characterization of a microwave plasma jet (TIAGO) in‐contact with water: Application in degradation of methylene blue dye. Issue 3 (17th October 2019)

• Record Type: Journal Article
• Authors: Hamdan, Ahmad; Gagnon, Clara; Aykul, Melisa; Profili, Jacopo
• Is Part Of: Plasma processes and polymers. Volume 17:Issue 3(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-10-17
• Subjects: microwave discharges -- optical emission spectroscopy -- plasma in‐contact with water -- plasma treatment -- TIAGO; Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.201900157
• Languages: English
• ISSNs: 1612-8850

Abstract

Abstract: Plasma in or in‐contact with liquids is a research field that has great potential in the treatment of wastewater. Today, efforts are focused on finding a plasma source that can efficiently remove persistent pollutants from water. In this study, we evaluate the effectiveness of a microwave plasma jet, in TIAGO (Torche à Injection Axiale sur Guide d'Ondes) configuration, using methylene blue (MB) as a model organic contaminant. The assessments conducted herein show that MB degradation is promoted at short nozzle–water distance, high gas flow rate, elevated microwave power, and excessive initial water conductivity (up to 10, 000 µS/cm). The plasma characteristics, namely composition, electron density, and OH rotational temperature, as well as water acidity and conductivity are also evaluated. Abstract : The microwave plasma jet, TIAGO (Torche à Injection Axiale sur Guide d'Ondes) configuration, is an efficient system to degrade organic pollutants in water. The degradation efficiency of methylene blue is the greatest at a short nozzle–water distance and high microwave power. This system demonstrates high efficiency to remove the pollutant from water at very high initial conductivity.