CN-121974474-A - Photocatalytic optical fiber in-situ well repairing device for treating underground water organic pollution

Abstract

The invention discloses a photocatalytic optical fiber in-situ remediation well device for treating underground water organic pollution, which relates to the technical field of environmental remediation and comprises a light source, a shaft and an optical fiber, wherein the in-situ remediation well device is fixed by the shaft, the optical fiber is arranged in the shaft, and the light source is arranged at the top of the optical fiber. The invention combines the photocatalytic oxidation method in the in-situ chemical oxidation restoration process of the underground water, strengthens the in-situ chemical oxidation restoration efficiency of the organic pollution of the underground water, reduces the consumption of an oxidant, and further reduces the risk of secondary pollution. The invention adopts the coating technology and uses the light-emitting diode as a light source, the coating technology combines optical fiber conduction to realize the direct irradiation of light to the catalyst, improves the photocatalysis efficiency, can realize the recovery-free catalyst, and solves the problems of insufficient illumination, difficult recovery of the photocatalyst and the like.

Inventors

• CHEN QINGKONG
• WENG JIAHAO
• CHEN SHUANG

Assignees

• 重庆交通大学

Dates

Publication Date

20260505

Application Date

20260325

Claims (10)

1. 1. The photocatalysis optical fiber in-situ remediation well device for treating underground water organic pollution is characterized by comprising a light source, a shaft and an optical fiber, wherein the in-situ remediation well device is fixed by the shaft, the optical fiber is arranged in the shaft, and the light source is arranged at the top of the optical fiber.
2. 2. A photocatalytic optical fiber in-situ remediation well device for treating groundwater organic pollution as set forth in claim 1 wherein said optical fiber has a photocatalyst on its surface.
3. 3. A photocatalytic optical fiber in situ remediation well device for treating organic contamination of groundwater as claimed in claim 2 wherein said photocatalyst is attached to the surface of said optical fiber by a coating technique.
4. 4. A photocatalytic optical fiber in situ remediation well device for treating organic contamination of groundwater as claimed in claim 3 wherein light from said light source is diverted inside said fiber and leaks at the end or side of said fiber.
5. 5. The photocatalytic fiber in-situ remediation well device for treating organic contamination of groundwater of claim 1, further comprising a water seepage hole, wherein a plurality of said water seepage holes are provided in said well bore, and groundwater can flow into or out of said well bore through said water seepage holes.
6. 6. A photocatalytic optical fiber in situ remediation well device for treating organic contamination of groundwater as claimed in claim 1, further comprising an oxidizer injection tube disposed within said well bore.
7. 7. A photocatalytic optical fiber in situ remediation well device for treating organic contamination of groundwater as claimed in claim 6 further comprising an oxidant addition port through which oxidant is injected into said oxidant injection tube.
8. 8. The photocatalytic fiber in-situ remediation well device for treating groundwater organic pollution of claim 7, further comprising a booster pump disposed between said oxidant addition port and said oxidant injection tube, wherein said oxidant enters said oxidant injection tube after passing through said booster pump.
9. 9. The photocatalytic fiber in-situ remediation well device for treating groundwater organic pollution of claim 1, wherein said light source is a light emitting diode light source.
10. 10. A photocatalytic optical fiber in-situ remediation well device for treating groundwater organic pollution as claimed in claim 1 wherein said optical fiber has a diameter of 10mm.

Description

Photocatalytic optical fiber in-situ well repairing device for treating underground water organic pollution Technical Field The invention relates to the technical field of environmental remediation, in particular to a photocatalytic optical fiber in-situ remediation well device for treating organic pollution of underground water. Background At present, an in-situ remediation well is a main treatment mode of groundwater organic pollution. The technology comprises the steps of 1, excessive use of the oxidant, limited oxidant diffusion capacity, low pollutant mass transfer efficiency and other factors in a polluted groundwater environment, more than 3 times of the theoretical demand on the practical oxidant addition, 2, secondary pollution risk, generation of intermediate products with stronger partial toxicity due to incomplete reaction of the oxidant and the target pollutant, and possibility of secondary environmental problems such as heavy metal activation migration, water pH fluctuation and the like caused by the non-targeted consumption of the oxidant, 3, low non-advanced oxidation efficiency, limited degradation capacity of the traditional oxidant on persistent organic matters (POPs), obvious reduction of reactivity in a low-temperature environment, and interference of a groundwater matrix on the oxidation process. Accordingly, those skilled in the art have focused their efforts on developing a novel photocatalytic fiber in situ remediation well device aimed at enhancing the in situ chemical oxidation remediation efficacy of groundwater organic pollution. The invention provides a high-efficiency sustainable technology, namely a photocatalytic oxidation method, which is used in the in-situ chemical oxidation restoration process of groundwater, and a photocatalyst receives light energy and generates oxidation substances such as OH and the like to degrade organic pollutants in water. The photo-generated electrons (e -) generated in the photocatalysis process can directly drive the activation (e -+HSO5-→SO4·—+OH-) of oxidants such as Persulfate (PMS) and the like to improve the utilization rate of the oxidants, thereby reducing the consumption of the oxidants and further reducing the risk of secondary pollution. The photocatalysis activates PMS to generate SO 4·— and OH double free radicals, electron transfer inhibits recombination, and cooperatively degrades pollutants, and the synergistic restoration effect of the photocatalysis and the PMS is obviously superior to that of a single technology. However, the heterogeneous photocatalysis technology is applied to the in-situ restoration of groundwater, so that the problems that the powder photocatalyst is difficult to recover, the groundwater environment is matt and light is difficult to introduce are solved, and the device aims to solve the problems that the illumination is insufficient, the photocatalyst is difficult to recover and the like by taking an LED lamp as a light source and an optical fiber as a light conduction channel and a fixed carrier of the photocatalyst. Disclosure of Invention In view of the above-mentioned drawbacks of the prior art, the present invention is directed to how to use a photocatalytic oxidation method in an in-situ chemical oxidation remediation process of groundwater. In order to achieve the aim, the invention provides a photocatalytic optical fiber in-situ remediation well device for treating organic pollution of underground water, which is characterized by comprising a light source, a shaft and an optical fiber, wherein the in-situ remediation well device is fixed by the shaft, the optical fiber is arranged in the shaft, and the light source is arranged at the top of the optical fiber. Further, the surface of the optical fiber is provided with a photocatalyst. Further, the photocatalyst is attached to the surface of the optical fiber by a coating technique. Further, the light emitted from the light source is transferred inside the optical fiber and leaked at the end or side of the optical fiber. Further, the underground water treatment device also comprises water seepage holes, wherein a plurality of water seepage holes are formed in the shaft, and underground water can flow into or out of the shaft through the water seepage holes. Further, an oxidant injection tube is included and is disposed within the wellbore. Further, an oxidant adding port is further included, through which an oxidant is injected into the oxidant injection pipe. Further, the device also comprises a pressure pump, wherein the pressure pump is arranged between the oxidant adding port and the oxidant injection pipe, and the oxidant enters the oxidant injection pipe after being acted by the pressure pump. Further, the light source is a light emitting diode light source. Further, the diameter of the optical fiber is 10mm. The beneficial technical effects of the invention are as follows: 1. In the existing in-situ chemical oxidation technology, the problems