Assessment of the Physicochemical Properties and Biological Effects of Water Activated by Non-thermal Plasma Above and Beneath the Water Surface

A direct current atmospheric pressure cold plasma microjet (PMJ) was used to produce plasma activated water (PAW) in two generation modes above (PAW‐A) and beneath (PAW‐B) the water surface. The physicochemical characteristics and biological effects of them were measured respectively. Results showed...

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Bibliographic Details
Published in:Plasma processes and polymers 2015-05, Vol.12 (5), p.439-449
Main Authors: Tian, Ying, Ma, Ruonan, Zhang, Qian, Feng, Hongqing, Liang, Yongdong, Zhang, Jue, Fang, Jing
Format: Article
Language:English
Subjects:
Activated
Assessments
Biological effects
Cold plasmas
Dogs
generation mode
Membranes
Microjets
physicochemical characteristics
plasma activated water
reactive oxygen species
Sterilization
Surface chemistry
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Summary:A direct current atmospheric pressure cold plasma microjet (PMJ) was used to produce plasma activated water (PAW) in two generation modes above (PAW‐A) and beneath (PAW‐B) the water surface. The physicochemical characteristics and biological effects of them were measured respectively. Results showed that PAW‐B exhibited stronger disinfection efficiency than PAW‐A, which was associated with ORP and conductivity, but not pH value, temperature, H2O2, NO3− or NO2−. Furthermore, the cell membrane integrity and membrane potential of S. aureus were destroyed more severely by PAW‐B. More importantly, a significant increase of intracellular ROS was induced by PAW‐B, which was supposed to contribute most to the sterilization. This work provides valuable guidance for the production and wide applications of PAW. A cold plasma microjet (PMJ) is used to produce plasma activated water in two generation modes above (PAW‐A) and beneath (PAW‐B) the water. Their physicochemical characteristics and biological effects are measured. Results show that PAW‐B exhibited stronger disinfection efficiency than PAW‐A, which most correlated with intracellular ROS. This work sheds light on the further sterilization mechanisms and provides guidance for the production of PAW.
ISSN:1612-8850
1612-8869
DOI:10.1002/ppap.201400082