A direct‐current, cold‐atmospheric‐pressure air plasma microjet (PMJ) sustained in a quasi‐steady gas cavity in a liquid medium is used to inactivate Staphylococcus aureus (S. aureus) suspended in the liquid. The temperature and the pH value of the liquid change to steady‐state values of about 40 °C and 3.0–4.5, respectively, after 10 min of plasma treatment. The decrease in the pH is attributed to the reaction of NOx produced in the air plasma with water at the gas–liquid interface. The concentrations of NO and NO are measured to be 37 mg · L−1 and 21 mg · L−1, respectively, after a 20 min of plasma treatment. Effective inactivation of S. aureus is found to start after the pH values decreases to about 4.5. This is attributed to the high oxidizing potential of the perhydroxyl radical (HOO•) on the fatty acid in the cell membranes of the microorganisms in the liquid.

最新修改

• 10/31/2018

Creator

• Fuxiang Liu, Peng Sun, Na Bai, Ye Tian, Haixia Zhou, Shicheng Wei, Yanheng Zhou, Jue Zhang, Weidong Zhu, Kurt Becker, Jing Fang

Publisher

• WILEY‐VCH Verlag

Date created

• 2010/3/22

Resource type

• Journal

Source

• Journal Plasma Processes and Polymers Volume 7 Issue 3‐4 Pages 231-236

Rights statement

• In Copyright