Research work of the dissociation of toxic organic materials in aqueous solution using hotspot generation by micro-bubble

我们在世界上首次通过微泡的崩塌成功地在水溶液中产生了大量的自由基，如羟基。用电子自旋共振方法对自旋捕获材料DMPO的自由基进行了研究。我们还进行了腰水处理的实际研究，结果表明，利用我们的技术，大部分有机物都能解离到COD2000 mg/L以上、腰水200t/d以上的水产水厂的腰水中。微量臭氧加速了微泡的崩塌过程，但其用量还不到被处理有机物化学计量比所需体积的1/10，最终通过加入一定量电解质的水溶液中微泡的崩塌技术成功地制备出了纳米气泡。纳米气泡的尺寸为100-200 nm，气泡可以稳定一个月以上。臭氧纳米气泡是一种对环境破坏小、杀菌力强的杀菌剂，氧气纳米气泡对水生生物具有生理活性。

We succeed to generate a lot of free-radical, such as OH, in aqueous solution by collapsing micro-bubbles firstly in the world. Free-radical was evaluated by the method of Electron Spin Resonance with the spin trap material of DMPO. And we demonstrated that the free-radical generation by micro-bubble is several thousands times as effective as that by ultrasound.We also conducted the practical investigations of the waist water treatment and demonstrated that by using our technology most of the organic material was dissociate to carbon dioxide and water in the waist water from a fishery factory with COD more than 2000mg/L and waist water more than 200t/day. The efficiency of the process of collapsing of micro-bubble was accelerated by small amount of ozone, but the amount was less than 1/10 of the estimated volume which was required from the point of stoichiometry of the treated organic material.We finally succeed to produce the nano-bubble by the collapsing technology of micro-bubble in the aqueous solution with some amount of electrolytes. The size of nano-bubble is 100-200nm, and the bubble can be stable for more than one month. Ozone nano-bubble can be used as the strong sterilizer with small damage to environment, and oxygen nano-bubble was confirmed the physiological activation to aqueous creatures.