In this study, we discuss a process for selectively generating reactive oxygen species (ROS),
such as H 2 O 2 and dissolved O 3, in plasma-activated water (PAW) using pure CO 2 as a
plasma-forming gas. A detailed comparison of the gas species/radicals present in plasma
and the properties of PAW when using CO 2 and air as plasma-forming gases is presented.
Our results show that PAW generated with CO 2 has a significantly higher pH and lower
oxidizing potential and electrical conductivity compared to PAW generated with air. Species …

In the present work, a process of a selective generation of reactive oxygen species (ROS)
such as H2O2 and dissolved O3 in plasma-activated water (PAW) is discussed. For selective
ROS generation, pure CO2 was used as a plasma-forming gas. The gases species present
in plasma and properties of PAW are compared in details when CO2 and air are used as
plasma forming gas. The results reveal that PAW (CO2) has significantly higher pH, and low
oxidizing potential and electrical conductivity compared to PAW (air). The formed species in …