Experimental Studies on Physicochemical Parameters of Water Samples before and after Treatment with a Cold Atmospheric Plasma Jet and its Optical Characterization

Abstract

Cold plasma-liquid interaction becomes a growing interdisciplinary area of research involving plasma physics, fluid science, and chemistry. Plasma-liquid interaction has gained more interest over the last many years due to its potential applications in different fields. Cold atmospheric plasma jet is an emerging technology for surface drinking water treatment to improve quality and surface modification that is chemical-free and eco-friendly. Cold plasma treatment of water samples results in changes in turbidity, pH, and conductivity and in the formation of reactive oxygen and nitrogen species (RONS). As a result, plasma-activated water has a different chemical composition than water and can serve as an alternative technique for microbial disinfection. CAPJ has been generated by a high voltage 5 kV and a high frequency 19.56 kHz power supply. The discharge has been characterized by an optical method. To characterize the cold atmospheric pressure argon plasma jet, discharge plume temperature, and electron rotational and vibrational temperature have been determined. Cold atmospheric argon plasma jet produced at atmospheric condition contains high energetic electrons, ions, UV radiation, reactive oxygen, and nitrogen species named as cold plasma which has a wide range of applications in the biomedical industry, as well as in water treatment. Nowadays, researches have been carried out on ozonation through plasma jet interaction with surface drinking water. In this paper, we compare the change in physical and chemical parameters of surface water used for drinking purposes. The significant change in the physical parameters such as pH, turbidity, and electrical conductivity was studied. In addition, the significant changes in the concentration and absorbance of nitrate, ferrous, and chromium ions with respect to treatment time were studied. Our results showed that plasma jet interaction with surface drinking water samples can be useful for the improvement of water quality and an indicator for which reactive species play an important role in plasma sterilization.

Effect of plasma treatment on the seed germination and seedling growth of radish (Raphanus sativus)

“…Plasma has been widely applied to different areas, including semiconductor, optics, photonics, manufacturing, medicine, cosmetics, agriculture, and waste treatment [1][2][3][4][5][6][7][8][9][10]. Plasma farming, which has contributed to produce safe agricultural products and increase the income of rural households, has been in the spotlight.…”

Characterization of Plasma Activated Water Generated from Gliding Arc Discharge and Its Application on Enhancement of Seed Germination of Radish (Raphanus sativus var. longipinnatus)

“…PAW has unique chemical composition than water as the formation of reactive nitrogen species (RNS) and reactive oxygen species (ROS) during the discharge have the ability to modify the important properties of water like pH, oxidation-reduction potential, conductivity, H2O2 concentration, nitrate and nitrites concentration, etc. (Šimečková et al, 2020;Baniya et al, 2021). It can be generated by two major approaches.…”

Effects of Plasma-Activated Water on Soybean and Wheat: Germination and Seedling Development

“…Water acidification is seen during plasma discharge because of the formation of peroxynitrous acid, HNO 2 and HNO 3 , as reported by earlier studies. 8,59,60 Electrical conductivity (EC) usually identifies active ions present in a liquid and measures the liquid's ability to transport an electrical current. 19,24,61 There was a significant increment of EC in PAW samples as plasma activation time increased, reaching 58.6 ± 1.60 µS/cm at 10 min, pointing out the generation of active ions in PAW.…”