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Photoelectrochemical reaction cell and method for treating hydrogen sulfide waste gas and waste water
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A chemical reaction, photoelectric technology, applied in chemical instruments and methods, oxidized water/sewage treatment, special compound water treatment, etc., to achieve the effect of efficient degradation, risk avoidance and purification process
Active Publication Date: 2021-02-26
SUZHOU INST FOR ADVANCED STUDY USTC
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[0006] The purpose of the present invention is to solve the problems existing in the photoelectrochemical sulfur recovery technology and the advanced electrochemical oxidation degradation pollutant technology, and provide a new green and sustainable treatment process, which uses sunlight to drive synchronously to realize sulfur recovery and high efficiency of pollutants. degradation
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Embodiment 1
[0045] Example 1 A photoelectrochemical reaction cell recovers sulfur element from hydrogen sulfide waste gas and a method for synchronous wastewater advanced electrochemical oxidation to degrade pollutants
[0046] In this embodiment, carbamazepine is used to represent biodegradable pollutants in wastewater, FeCl 3 As an iron source in the catholyte, potassium peroxymonosulfate acts as an oxidant for cathodic advanced electrochemical oxidation.
[0047] In this example, 1% H 2 S (99% N 2 ) gas is passed into the anode chamber at 10ml / min, the catholyte is added with 4ppm carbamazepine and ultrasonically dissolved and then transferred to the cathode chamber, and a final concentration of 81.5 μM potassium persulfate is added, and the catholyte is stirred during the whole reaction process Mix well.
[0048] see figure 1 , the illumination effectively promotes the anode compartment I - Oxidation and cathode Fe 3+ synchronization restore. figure 2 Shown in embodiment 1 ano...
Embodiment 2
[0053] A photoelectrochemical reaction cell recovers sulfur element from hydrogen sulfide waste gas and a method for synchronous wastewater advanced electrochemical oxidation degradation of azo dyes
[0054] In this embodiment, Rhodamine B is used to represent pollutants in wastewater, FeCl 3 As the iron source in the catholyte, hydrogen peroxide acts as the oxidizing agent for the cathodic advanced electrochemical oxidation.
[0055] In this example, 1% H 2 S (99% N 2 ) gas is passed into the anode chamber at 10ml / min, and 20mg / L Rhodamine B and 1mM FeCl are added to the catholyte 3 Dissolved and then transferred to the cathode chamber, and added a final concentration of 1mM H 2 o 2 , the catholyte was mixed with a stir bar throughout the reaction.
[0056] see Figure 7 , the characteristic absorption peak of rhodamine B gradually decreases with the increase of the light time, which means that the iron ions reduced by the cathode effectively activate hydrogen peroxide ...
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Abstract
The invention relates to a method and a device for synchronous hydrogen sulfide waste gas treatment and advanced wastewater oxidation treatment using sunlight as a driving force to realize sulfur resource recovery. The adopted photoelectric catalytic reactor includes an anode chamber, a photoanode, a cathode chamber, a cathode, an external circuit and an ion exchange membrane separating the anode chamber and the cathode chamber. In the present invention, by adding redox active substances (such as iodide ions and iron ions) into the anode chamber and the cathode chamber, the holes generated by the photocatalytic anode are used to indirectly oxidize sulfur ions to generate high-purity, recyclable elemental sulfur particles; Reduction of catalytically active ions (such as ferrous ions) to activate persulfate to generate free radicals, thereby achieving efficient removal of pollutants in wastewater. The invention can use sunlight as the only energy source to simultaneously remove and recover sulfur ions in waste gas and degrade organic pollutants in waste water, and is suitable for anaerobic digestion of waste gas, sulfur-containing waste water / waste gas treatment and water environment restoration.
Description
technical field [0001] The invention relates to the technical fields of waste water, waste gas treatment and sulfur resource recovery, and more specifically relates to a photoelectric catalytic process and device capable of synchronously recovering sulfur resources from hydrogen sulfide waste gas and advanced electrochemical oxidation treatment of waste water. Background technique [0002] Hydrogen sulfide is a common pollutant in the process of biological wastewater treatment, which has the characteristics of foul smell, high toxicity and high corrosion. Especially in anaerobic digestion or treatment of high-sulfur wastewater, the concentration of hydrogen sulfide can reach a high level. If it cannot be effectively removed, it will often cause environmental pollution, equipment corrosion, pipeline blockage and other problems, causing equipment failure and endangering human health. . On the other hand, sulfur is an important industrial raw material, which is widely used in ...
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