Hydroxyl radical generation method, organic wastewater treatment method and device
A technology of organic wastewater treatment and generation method, which is applied in special compound water treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of low degradation efficiency, secondary pollution, and inability to treat organic wastewater. , to achieve the effects of highly controllable process, environmental protection, low consumption and economic utility, and highly innovative treatment methods
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Embodiment 1
[0072] In this embodiment, the electrifying material is polytetrafluoroethylene powder with a diameter of 3 μm, and the surface of the powder is first modified by ion sputtering spraying and inductively coupled plasma etching. Then 20mg of polytetrafluoroethylene powder was fully dispersed into 50mL of ultrapure water (18.4MΩ.S) by magnetic stirring for 12h, and finally the above solution was transferred to an ultrasonic generator and treated at 120W, 40kHz for 4h. During the process of ultrasonic treatment, the generation, growth, and implosion of cavitation bubbles induced by ultrasonic waves will lead to frequent contact-separation cycles between PTFE powder and water molecules. When the two are in contact, since PTFE exhibits a stronger electron affinity, electron transfer from water to PTFE will occur at the PTFE / water interface, thereby leaving an electron on the PTFE surface. The next surface polarization charge is caused by the contact electrification effect, and at th...
Embodiment 2
[0074] Similar to the operation in Example 1, the difference is that the concentration of dissolved oxygen in water is adjusted by passing different atmospheres into the solution, and then the data of hydroxyl radicals generated under different dissolved oxygen concentrations are explored. The types of atmospheres introduced are: nitrogen, oxygen; the concentration of hydroxyl radicals is determined by reacting with terephthalic acid dissolved in sodium dodecahydrate to form adducts with fluorescence responses. Such as figure 1 As shown (the open box is the measurement result when nitrogen gas is continuously fed, and the solid box is oxygen gas), under the condition that nitrogen gas is continuously fed into the solution to eliminate dissolved oxygen in water, the concentration of hydroxyl radicals generated is much lower Under the condition of continuously feeding oxygen, it is only 28.3% of that under the condition of feeding oxygen.
Embodiment 3
[0076] The electrifying material may be a non-dielectric material, preferably gold (Au) particles with a diameter of 3 μm in this embodiment. 20mg of gold particles were first fully dispersed into 50mL of ultrapure water (18.4MΩ.S) by magnetic stirring for 12h, and finally the above solution was transferred to an ultrasonic generator and treated at 120W, 40kHz for 4h. During sonication, the generation, growth, and implosion of cavitation bubbles induced by ultrasound will lead to frequent contact-separation cycles between gold particles and water molecules. When the two are in contact, due to the difference in electron affinity, a similar electron transfer will also occur at the gold particle / water interface, and finally generate hydroxyl radicals directly or through a chain reaction. Subsequently, under the action of a series of chain reactions, it is converted into hydroxyl radicals, and at the same time, the gold particles also fall back to the initial surface uncharged sta...
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