Generation of radicals using discharge inside bubbles and its applications for water treatment

(1)研究了两种陶瓷扩散器发泡体系中自由基的产生及其在水处理中的应用。测量了氧、Ar和空气中的OH自由基在300.335 nm范围内的光发射。从OH自由基发出的光强度与施加的电压成正比。测得氧气中过氧化氢(H_2O_2)的最高浓度为40 mg/L，空气中为35 mg/L。溶解臭氧浓度约为0.13 mg/L。(2)测量了利用水中气泡内放电产生的臭氧。表面臭氧在氧气中的最大释放浓度约为6.4g/Nm~3，溶解在水中的臭氧的最大浓度约为0.3 mg/L。测量了OH自由基的发光强度，并随电压的升高而增加。水中蓝色的去除已经得到了证实。(3)虽然已经尝试过利用放电产生的自由基为水来降解含醋酸的水，但另一种新的方法--水中加压补气产生的沿水面放电的效果还没有得到明确的证实。已经证实，该方法可以分解水中的醋酸。

(1) Generation of radicals in the foaming system using two ceramic diffusers and its applications to water treatment have been done. The measurements of light emissions from OH radicals in the range of 300.335 nm have been done is the oxygen, Ar and air. The light intensity emitted from OH radicals is proportional to the applied voltage. The maximum concentration of hydroperoxide (H_2O_2) obtained is 40mg/l in oxygen and 35 mg/l in air. The dissolved ozone concentration is about 0.13 mg/l.(2)The generated ozone using discharges inside bubbles in water has been measured. The maximum concentration of exhausted ozone from water surface in oxygen is about 6.4 g/Nm3 and dissolved ozone in water is about 0.3 mg/l. The intensity of light emission from OH radicals has been measured and it increases with the applied voltage. The removal of blue color in water has been confirmed.(3) Although the water including acetic acid has been tried to decompose it by the generated radicals produced by discharges is water, the effect has not been confirmed clearly Another new method which has discharge along the water surface generated by pressured fed gas in water. It has been confirmed that this method is possible to decompose the acetic acid in water.