Decolorization of Rhodamine B in Water by Pulsed High-Voltage Gas Discharge
Decolorization of Rhodamine B in Water by Pulsed High-Voltage Gas Discharge
复制标题
脉冲高压气体放电对水中罗丹明B的脱色
DOI：
10.1143/jjap.42.1422
复制
发表时间：
2003
影响因子：
1.5
通讯作者：
T. Nishitani
中科院分区：
文献类型：
--
作者：
Y. Nakagawa;Susumu Mitamura;Yasuhiro Fujiwara;T. Nishitani
有机染料罗丹明 B 染色的水中的红色可通过脉冲气体放电在 10 秒内消除。水被空气雾化，并作为雾沿着反应堆的中心部分流动，并作为水膜沿着内壁流动。径向势垒放电产生的臭氧、OH、O等自由基对罗丹明B进行脱色。在低水流量、高总输入能量时颜色完全脱除，但在高水流量、低总输入能量时去除效率最高。通过使用氧气，由于产生的臭氧浓度比使用空气的情况更高，因此改善了颜色去除和去除效率。效率的提高与罗丹明 B 的初始浓度成正比。在浓度为 22 mg/L、水流量为 150 mL/min 时，去除效率最高为 8.2 µg/J。在氩气中进行的放电结果表明，由水产生的自由基对脱色有很大贡献。通过改变反应器半径，我们发现以水膜形式从反应器壁流下的水以及反应器内的雾化水都被脱色。
The red coloring in water colored by an organic dye, rhodamine B, was removed in as fast as 10 s by pulsed gas discharge. Water was atomized by air and flowed as a mist down the central part of a reactor and as a water film down the inner wall. Radicals, such as ozone, OH and O, which were produced by radial barrier discharge, decolorized rhodamine B. Color was completely removed at a low water flow rate and high total input energy, but the removal efficiency was highest at a high water flow rate and low total input energy. By using oxygen, the color removal and removal efficiency were improved due to higher ozone concentration produced than in the case of using air. The efficiency was improved in proportion to the initial concentration of rhodamine B. The highest removal efficiency of 8.2 µg/J was obtained at 22 mg/L and a water flow rate of 150 mL/min. The results of the discharge performed in Ar suggest that the radicals produced from water considerably contributed to the decolorization. By changing the reactor radius, we clarified that the water flowing down the reactor wall as a water film was decolorized as well as the atomized water in the reactor.