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Interactions between pH, reactive species, and cells in plasma-activated water can remove algae

dc.contributor.authorMizoi, Ken
dc.contributor.authorRodríguez González, Vicente
dc.contributor.authorSasaki, Mao
dc.contributor.authorSuzuki, Shoki
dc.contributor.authorHonda, Kaede
dc.contributor.authorIshida, Naoya
dc.contributor.authorSuzuki, Norihiro
dc.contributor.authorKuchitsu, Kazuyuki
dc.contributor.authorKondo, Takeshi
dc.contributor.authorYuasa, Makoto
dc.contributor.authorFujishima, Akira
dc.contributor.authorTeshima, Katsuya
dc.contributor.authorTerashima, Chiaki
dc.date.accessioned2023-06-14T16:12:34Z
dc.date.available2023-06-14T16:12:34Z
dc.date.issued2022
dc.identifier.citationMizoi, K., Rod?iguez-Gon?alez, V., Sasaki, M., Suzuki, S., Honda, K., Ishida, N., Suzuki, N., Kuchitsu, K., Kondo, T., Yuasa, M., Fujishima, A., Teshima, K., & Terashima, C. (2022). Interactions between pH, reactive species, and cells in plasma-activated water can remove algae. RSC Advances, 12(13), 7626-7634. https://doi.org/10.1039/d1ra07774k
dc.identifier.urihttp://hdl.handle.net/11627/6363
dc.description.abstract"Lightning strikes cause nitrogen to dissolve in water and form reactive nitrogen and oxygen species, which form natural fertilizers that can be absorbed through plant roots. Such processes during rainstorm events can be simulated by applying plasma to a solution. Plasma-activated water (PAW) has great potential as a source of various dissolved reactive chemical species. Different mixtures of species are produced using different solution compositions. Here, basil seeds were grown in PAW to prevent blooms of Chlorella vulgaris and ion chromatography and UV-vis spectroscopy were used to quantify reactive ions. NO2?, NO3?, and H2O2 were found to be key to the antialgal effect. Secondary reactive ions such as peroxynitrite (ONOO?, ONOOH) were also involved. The antialgal effect was strongly related to the pH around the algal cells. Acidification was predominantly caused by the generation of NO2? and H2O2. After two weeks monitoring basil growth, the antifungal properties were preserved, few reactive oxygen species formed in the plasma zone, and only reactive nitrogen species were transformed into reactive peroxynitrite ions. The pH around the cells was determined using an iridium oxide microelectrode. The PAW antialgal mechanism depended on acidic conditions (pH 2.2, at which peroxynitrite can be generated) under which ONOOH penetrated the algal cell membranes, destroying the cells and preventing growth. This practical and sustainable PAW process allows a surprising amount of fertilizer to be generated with an antialgal effect that could be used in various eco-friendly agricultural processes under ambient conditions. "
dc.publisherRoyal Society of Chemistry
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectNitric-oxide
dc.subjectBacterial inactivation
dc.subjectPeroxynitrite
dc.subjectTemperature
dc.subject.classificationQUÍMICA
dc.titleInteractions between pH, reactive species, and cells in plasma-activated water can remove algae
dc.typearticle
dc.identifier.doihttps://doi.org/10.1039/D1RA07774K
dc.rights.accessAcceso Abierto


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