Microwave electrochemical method for processing waste water and devices thereof
A technology for wastewater treatment and electrochemistry, applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc. problems, to achieve the effect of not easily damaged by microwaves, stable surface state, and wide potential window
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[0023] Example 1: Such as figure 2 As shown, the device consists of a reactor 1, an anode 2, a cathode 3, a DC power supply 4, a peristaltic pump 5, a flow meter 6, a constant temperature bath 7 and a pipeline 8. Anode 2 adopts boron-doped diamond film electrode, and cathode 3 adopts titanium electrode. Anode 2 and cathode 3 are respectively arranged in reactor 1. Anode 2 and cathode 3 are energized by DC power supply 4, reactor 1 is arranged in a microwave oven, and the pipeline 1 One end is inserted into the reactor 1, the other end passes through the peristaltic pump 5, the flow meter 6, and the thermostat 7 in turn, and is inserted into the reactor 1 to realize the flow cycle injection degradation.
Example Embodiment
[0024] Example 2, using 2,4-dichlorophenoxyacetic acid wastewater as the water sample to be treated
[0025] COD of water samples Cr It is 115mg / L, pH is 6, the concentration of supporting electrolyte sodium sulfate is 0.05mol / L, and the volume is 100ml. The area of the boron-doped diamond film electrode and the titanium electrode as anode and cathode respectively is 5.5 cm 2 , The electrode spacing is 1cm, the current density is 20mA / cm 2 For constant current degradation, the frequency of the microwave is 2450MHz and the power is 120W. A separate electrochemical degradation was used as a comparative test for effect comparison. COD at 3h by electrochemical oxidation alone Cr The removal rate is only 54%; when the microwave-enhanced boron-doped diamond film electrode electrochemical oxidation technology is used for 3 hours, the removal rate is greatly increased to 88%, and the removal rate is increased by 63%.
[0026] by figure 1 It can be seen (the SEM model is Quanta200FEG, th...
Example Embodiment
[0027] Example 3 Take methyl orange wastewater as the water sample to be treated
[0028] The TOC (total organic carbon) of the water sample is 101.5 mg / L, the pH is 5, the concentration of the supporting electrolyte sodium sulfate is 0.05 mol / L, and the volume is 100 ml. The area of the boron-doped diamond film electrode and the titanium electrode as anode and cathode respectively is 5.5 cm 2 , The pole distance is 1cm, the current density is 20mA / cm 2 For constant current degradation, the microwave frequency is 2450MHz and the power is 120W. A separate electrochemical degradation was used as a comparative test for effect comparison. COD at 3h by electrochemical oxidation alone Cr The removal rate is only 49%; the removal rate is greatly increased to 96% when the microwave-enhanced boron-doped diamond film electrode electrochemical oxidation technology is used for 3 hours, and the removal rate is increased by 96%.
[0029] In practical large-scale treatment equipment, as the am...
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