Spectral Characteristics of Needle Array-Plate Dielectric Barrier Discharge Plasma and Its Activated Water

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-11-01 DOI:10.1155/2021/9771245

Yibing Li, Zhiqing Song, Tao Zhang, W. Xu, C. Ding, Hao Chen

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引用次数: 3

Abstract

The plasma-activated water (PAW), as a new environmentally friendly nonthermal processing technology, has attracted wide attention for its applications in agriculture, food, and biomedical fields. This paper used the needle array-plate dielectric barrier discharge (needle array-plate DBD) device to activate deionized water and prepare PAW simply and efficiently. It was found that the concentration of reactive oxygen and nitrogen species (RONS) generated in the process of needle array-plate DBD was large and varied. Especially in the wavelength range of 600–770 nm, the spectral intensity is stronger. And, the ionic wind is more likely to interact with the deionized water. The changes in PAW parameters and UV/Vis spectra with treatment time were measured under different voltages and needle-dielectric plate distances. Results show that increasing discharge voltage or decreasing needle-dielectric plate distance increases the concentration of RONS, ionic wind speed, water evaporation, and conductivity of the PAW and decreases pH. UV/Vis spectra results show that prolonged treatment time results in increased total absorbance and concentrations of H2O2 and NO 3 − and that a new absorption peak appears at 210 nm in the UV/Vis spectra. When the wavelength is larger than 210 nm, a redshifted new peak and color enhancement are observed. The seeds of Astragalus adsurgens Pall were treated by discharge plasma, PAW, and the combination of plasma and PAW. It was found that high voltage and long-time activated PAW could significantly increase the ROS level of seeds and seedlings after germination for 3 days, resulting in oxidative stress damage. The survival rate of seeds was lower than that under the half lethal dose. This paper provides a feasible device design for treating activated water in large quantities with high efficiency, which is important for the application of PAW and mutation breeding of A. adsurgens Pall.

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针阵列-板介质阻挡放电等离子体及其活性水的光谱特性

等离子体活化水(PAW)作为一种新型的环境友好型非热处理技术，在农业、食品、生物医学等领域的应用受到了广泛关注。本文采用针阵-板介质阻挡放电(needle array-plate DBD)装置对去离子水进行活化，简单高效地制备了PAW。结果表明，针阵板DBD过程中产生的活性氧和活性氮(RONS)浓度较大且变化较大。特别是在600 ~ 770 nm波长范围内，光谱强度更强。离子风更有可能与去离子水相互作用。在不同电压和针-介电板距离下，测定了PAW参数和紫外可见光谱随处理时间的变化。结果表明，增大放电电压或减小针-介电板距离可使材料的离子风速、水分蒸发和电导率增加，ph值降低。紫外/可见光谱结果表明，延长处理时间可使材料的总吸光度、H2O2和no3−浓度增加，并在210 nm处出现新的吸收峰。当波长大于210 nm时，观察到新峰红移和颜色增强。采用放电等离子体、PAW及等离子体与PAW联合处理沙棘黄芪种子。结果发现，高电压和长时间激活的PAW能显著提高种子和幼苗萌发3天后的ROS水平，造成氧化应激损伤。半致死剂量下种子成活率较低。本文提供了一种可行的高效、大批量处理活性水的装置设计，对PAW的应用和沙胶藻的突变育种具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.