The yield of redox reactions (Fe 2+ oxidation and Mn 7+ reduction in aqueous solutions) under the action of hot plasma radiation in liquid and species formed in the region of plasma discharge was measured. The goal of the investigation is to evaluate the role of hot plasma radiation as active factor compared to species generating in discharge itself. As source of active species we studied the spark discharge in air and in nitrogen (SD50 generator), the generator of corona discharge in air and low-pressure mercury UV lamp (λ = 253.7 nm). The yield of redox reactions for all sources was determined using detecting liquids; the mechanisms of these reactions were analysed. It was shown that chain reactions do not take place. When the yields were calculated, the stoichiometry of the reactions was taken into account. An analysis of the results shows that under the action of a spark discharge generator SD50, the main active factor is radiation. The role of active species formed in discharge region not more than 15%. Under the action of a spark discharge radiation, active species first form in the sample being processed, and then interact with substances dissolved in water. There is an indirect mechanism of action. Owing of this peculiarity, the redox properties of water, activated by hot plasma radiation, are the same as direct treatment of samples to hot plasma radiation. For a corona discharge plasma and radiation from a mercury lamp, such a mechanism does not occur.

中文翻译：

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直接和间接等离子处理水引起的化学反应与紫外线辐射效应的比较

测量了在热等离子体辐射作用下的氧化还原反应（水溶液中的 Fe 2+ 氧化和 Mn 7+ 还原）的产率和等离子体放电区域中形成的物质。调查的目的是评估热等离子体辐射作为活性因素与放电本身产生的物种相比的作用。作为活性物质的来源，我们研究了空气和氮气中的火花放电（SD50 发生器）、空气中的电晕放电发生器和低压汞紫外线灯（λ = 253.7 nm）。使用检测液体确定所有来源的氧化还原反应产率；分析了这些反应的机制。结果表明，链式反应不会发生。当计算产率时，考虑了反应的化学计量。结果分析表明，在火花放电发生器SD50的作用下，主要的活性因素是辐射。作用在放电区形成的活性种不超过15%。在火花放电辐射的作用下，活性物质首先在被处理的样品中形成，然后与溶解在水中的物质相互作用。有一个间接的作用机制。由于这种特性，由热等离子体辐射激活的水的氧化还原特性与将样品直接处理为热等离子体辐射相同。对于电晕放电等离子体和来自汞灯的辐射，这种机制不会发生。在火花放电辐射的作用下，活性物质首先在被处理的样品中形成，然后与溶解在水中的物质相互作用。有一个间接的作用机制。由于这种特性，由热等离子体辐射激活的水的氧化还原特性与将样品直接处理为热等离子体辐射相同。对于电晕放电等离子体和来自汞灯的辐射，这种机制不会发生。在火花放电辐射的作用下，活性物质首先在被处理的样品中形成，然后与溶解在水中的物质相互作用。有一个间接的作用机制。由于这种特性，由热等离子体辐射激活的水的氧化还原特性与将样品直接处理为热等离子体辐射相同。对于电晕放电等离子体和来自汞灯的辐射，这种机制不会发生。