Photoelectrochemical reaction tank and method of treating hydrogen sulfide waste gases and waste water by same
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A chemical reaction and photoelectric technology, applied in chemical instruments and methods, special compound water treatment, light water/sewage treatment, etc., to achieve efficient degradation, risk avoidance and purification treatment process effects
Active Publication Date: 2018-09-14
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 anod...
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 synchronizing hydrogen sulfide waste gas treatment and advanced waste water oxidation by taking sunlight as the driving force and recycling sulfur resources. A photoelectrocatalytic reactor applied comprises an anode chamber, a photo-anode, a cathode chamber, a cathode, an external circuit and an ion exchange membrane. The anode chamber is separated from the cathode chamber by the ion exchange membrane. The method and the device have the advantages that redox active substances (such as iodide ions and iron ions) are added into the anode chamber and the cathode chamber, and cavities formed through photocatalysis of the anode oxidize sulfur oxide ions indirectly to form high-purity recyclable elemental sulfur particles; peroxymonosulfate isactivated by ions (such as ferrous ions) with catalytic activity, generated through cathodic reduction, to generate free radicals, and pollutants in waste water are removed efficiently; the sunlight can be used as the only energy, and sulfur ions in recycled waste gases and organic pollutants in the waste water can be removed synchronously; the method and the device are applicable to treatment ofanaerobic digestion waste gases and sulfide-containing waste water/waste gases as well as water environment remediation.
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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