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Plasma activated water prepared by different plasma sources:physicochemical properties and decontamination effect on lentils sprouts

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Plasma Science and Technology 2022年第1期24卷 108-117页

作者： Veronika MEDVECKA Samuel OMASTA Matej KLAS silvia mosovska Stanislav KYZEK Anna ZAHORANOVA Department of Experimental Physics Faculty of MathematicsPhysics and InformaticsComenius UniversityMlynska Dolina FI84248 BratislavaSlovakia Department of Nutrition and Food Quality Assessment Faculty of Chemical and Food TechnologySlovak University of TechnologyRadlinskeho 981107 BratislavaSlovakia Department of Genetics Faculty of Natural SciencesComenius UniversityIlkovicova 6Mlynska dolina84215 BratislavaSlovakia

The pulsed corona discharge(CD)generated in contact with water and directly in water,and high-power air plasma jet(APJ)were studied for production of plasma activated water(PAW).The changes of physical(pH,redox potential,conductivity,temperature)and chemical(peroxides,nitrites,nitrates concentrations)properties of treated water were *** comparison of CD generated in gas/water interface and underwater configuration in the same system showed that the interaction of reactive oxygen and nitrogen species formed in ambient air in gas/water system induces different chemical processes,leading to lower pH,higher oxidation-reduction potential(ORP)and higher conductivity of PAW than in underwater *** yield of peroxide was observed in both *** PAW prepared by APJ exhibits high concentration of nitrites and nitrates according to supplied energy,and related significant decrease of pH and increase of ORP and conductivity after *** antimicrobial effect of PAW prepared by CD and plasma jet on lentils sprouts was studied in different treatment and washing *** APJ appears to have great efficacy on water activation resulted in strong decontamination *** PAW treated by APJ for 10 min led to bacterial reduction from initial 8.3 to 5.9 and 4.0 log10 CFU g^(-1)after 10 and 30 min of washing,respectively.

关键词： plasma activated water physicochemical properties air plasma jet underwater plasma decontamination effect

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