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Abstract: Plasma-activated water (PAW) with a mixture of reactive oxygen and nitrogen species (RONS) has a wide range of applications in the health, agriculture, and the food sectors. However, some applications require PAW with a specific chemical composition. Therefore, we studied the generation of PAW by transient spark (TS) discharge in different gases (N2, O2, and synthetic air, dry or humidified) with direct or indirect contact of the discharge with water microdroplets formed by electrospray (ES) process. In direct contact, ES microdroplets were generated within the discharge zone. In the indirect treatment, the gas was first treated by TS discharge and sprayed by ES water microdroplets in the second section ofthe reactor. Using direct or indirect treatment, different inlet gas and input energy density, PAW with different composition was generated. Moreover, the obtained results allowed us to better understand the processes of PAW formation. H2O2(aq) is mainly formed due to short-lived reactive species, such as the OH radicals, and not by dissolution of gaseous H2O2. Next, NO2–(aq) ions are formed predominantly by the dissolution of gaseous HNO2.
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Citations: | 1.) | Agus, R., Pipoz, L., Avino, F., Lavrikova, A., Myers, B., Furno, I., 2025. Plasma-activated water retains antimicrobial properties against Escherichia coli after 72 h of storage. PLASMA PHYSICS AND CONTROLLED FUSION 67. https://doi.org/10.1088/1361-6587/ad9950
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------------- | | 5.) | Tian, Y., An, X., Du, X., Chang, D., Li, H., Hua, Y., Zhang, X., Zhang, J., Di, L., 2025. Plasma-assisted controllable synthesis of α-Co(OH)2 supported on multiwalled carbon nanotubes in water without precipitant addition. Journal of Alloys and Compounds 1010. https://doi.org/10.1016/j.jallcom.2024.178005
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(2024) Journal of Water Process Engineering, 67, art. no. 106127
DOI: 10.1016/j.jwpe.2024.106127
(2024)
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