A photoelectric Fenton device and method for remediating phthalate-contaminated soil and groundwater

Abstract

The invention discloses a device and a method for repairing phthalate-polluted soil and underground water through a photoelectric Fenton principle, belonging to the field of the repair of soil and underground water. The method comprises the steps of arranging electrodes like an oval in the area at which the soil polluted by phthalate and arranging a central electrode at the position at which the concentration of the pollutant is the highest, wherein both the central electrodes and the outermost electrode are cathode electrodes, and the oval covers the whole polluted area. According to the device and the method, a traditional photoelectric Fenton method is improved; electrolyte solution and hydrogen peroxide are directly injected into the soil, and then a photoelectric Fenton system is directly established in the soil via Fe2+ / Fe3+ produced on an anode and hydrogen peroxide produced at a cathode together with the poured electrolyte solution and the poured hydrogen peroxide; the surface of the soil is irradiated by using ultraviolet rays, so that the phthalate on the surface of the soil is thoroughly decomposed. The photoelectric Fenton system is efficiently and rapidly established through the method, the pollutant such as the phthalate is thoroughly decomposed, and the highest reaction efficiency can reach 99%.

Description

technical field [0001] The invention belongs to the field of soil and groundwater remediation, in particular to a photoelectric Fenton (Fenton) device and method for remediating phthalate-contaminated soil and groundwater. Background technique [0002] With the rapid development of the plastics industry and the widespread application of plastic products, phthalates enter the environment with the discharge of various types of sewage, resulting in widespread contamination of sediment, soil, water, air, organisms and atmospheric dust. known as ubiquitous pollutants. According to reports, the presence of phthalates has been detected in both the human environment and the natural environment, such as the detection of phthalates in the leachate and domestic waste of cities and small towns. The presence of this organic substance has been detected in , water bodies, organisms and even human bodies. [0003] Phthalic acid esters (Phthalic Acid Esters, referred to as PAEs, alias phth...

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Problems solved by technology

[0010] In order to solve the above-mentioned pollution problems of soil and groundwater, the present invention proposes a device and method for remediating phthalate-contaminated soil and groundwater by photoelectric Fenton with concentric oval electrodes.

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