KR-20260065284-A - GROUND WATER PURIFYING SYSTEM AND METHOD FOR PURIFYING GROUND WATER USING THE SAME

Abstract

The present disclosure relates to a method for purifying groundwater using an oxidizing agent and a reaction wall. The groundwater purification method of the present disclosure utilizes an oxidizing agent and a reaction wall to achieve excellent efficiency in removing pollutants, and allows for the recycling of iron-containing industrial waste, thereby enabling environmentally friendly and low-cost groundwater purification.

Inventors

• 김철용
• 이승택
• 최수빈

Assignees

• 인천대학교 산학협력단

Dates

Publication Date

20260508

Application Date

20241101

Claims (7)

1. A persulfate injection pipe connecting an upstream point of the target groundwater body to the surface; and A groundwater purification system comprising a permeable reactive wall positioned at a downstream point of a target groundwater body.
2. In paragraph 1, A groundwater purification system in which the lower part of the above persulfate injection pipe has a porous structure.
3. In paragraph 1, A groundwater purification system in which the above-mentioned permeable reactive wall contains iron-containing industrial waste.
4. In paragraph 3, A groundwater purification system in which the above iron-containing industrial waste contains zero-valence iron.
5. A step of injecting a persulfate solution into an upstream point of a target groundwater body through a persulfate injection pipe to form a mixed solution of organic pollutants and persulfates; and A groundwater purification method comprising the step of generating ferrous iron as the above-mentioned mixed solution passes through a permeable reaction wall.
6. In paragraph 5, The above mixed solution comprises the above organic pollutant and the above persulfate in a molar ratio of 1:10 to 1:500, a method for purifying groundwater.
7. In paragraph 5, The above permeable reactive wall comprises iron-containing industrial waste, and A groundwater purification method in which the weight ratio of carbon contained in the iron-containing industrial waste and the organic pollutant is 1:10 to 1:500.

Description

Groundwater Purification System and Method for Purifying Groundwater Using the Same The present disclosure relates to a groundwater purification system and a groundwater purification method using the same. Non-biodegradable substances, such as phenolic organic compounds and dioxins, which are known to be harmful to the human body, can originate from incineration facilities for municipal or industrial waste, as well as various combustion facilities and equipment. Non-biodegradable substances are unintentionally released into the natural environment without purification, causing adverse effects on the environment. Organic pollutants remaining in sediment after a chemical spill accident become a continuous source of pollution for the aquatic ecosystem due to resuspension and leaching from the contaminated sediment. Conventionally, technologies have been developed to remove as many non-biodegradable hazardous substances as possible from water to be treated containing non-biodegradable hazardous substances using filtration devices, membrane separation methods, etc., and to decompose non-biodegradable hazardous substances in the treated water (e.g., Japanese Patent Publication No. 1999-99395). Advanced Oxidation Processes (AOPs) are widely used for the purpose of mineralizing organic pollutants by utilizing powerful oxidizing agents (ozone, Fenton, persulfuric acid, etc.) that generate radicals and activators (transition metals, heat, microwaves, UV, etc.). Representative oxidizing agents used in advanced oxidation processes to remove organic pollutants harmful to the human body include permanganate, hydrogen peroxide, ozone, and persulfuric acid. First of all, regarding the chemical oxidation method using permanganate, the permanganate is an oxidizing agent applied in many remediation methods in contaminated areas and there are many cases where it has been applied in the field. However, while it exists very stably in the soil, it is an oxidizing agent that is difficult to apply to the treatment of various organic pollutants due to its low reactivity. In addition, in chemical oxidation methods using hydrogen peroxide, the hydrogen peroxide generates hydroxyl radicals through catalytic reactions, exhibiting excellent reactivity and wide applicability; however, it is very unstable in soil and decomposes easily, making it difficult to penetrate deep into the soil. Accordingly, chemical oxidation methods using hydrogen peroxide require a large amount of hydrogen peroxide for complete restoration and have the disadvantage of low cost efficiency. In addition, chemical oxidation methods using ozone have the disadvantage that they are difficult to handle because the ozone exists in a gaseous state, and they are difficult to apply effectively to various organic pollutants because of their low solubility in water. On the other hand, persulfate exhibits relatively superior stability in soil compared to other oxidizers and possesses broad reactivity toward various pollutants, so it has recently been receiving significant attention as an oxidizer capable of replacing existing ones. Generally, oxidizers achieve more effective oxidation reactions by forming highly reactive radicals through activation reactions rather than acting on themselves. Persulfate also forms radicals through activation reactions; in such cases, it possesses stronger oxidizing power, enabling it to effectively decompose pollutants. However, radicals formed from persulfate by transition metals react further with the transition metals, which resulted in reduced efficiency. Therefore, there is a need for research and development on high-efficiency groundwater purification systems and groundwater purification methods using persulfate. FIG. 1 is a schematic diagram of a groundwater purification system according to one embodiment of the present disclosure. FIG. 2 is a schematic diagram of an experiment to measure the purification efficiency of a groundwater purification system according to one embodiment of the present disclosure. FIG. 3 is the result of measuring the amount of methyl orange over time when the persulfate concentration (a) and the amount of scrap metal scrap (b) were varied in the groundwater purification system of the present disclosure. Figure 4 is an experimental result confirming whether there is a breach in the groundwater purification system according to Example 1 of the present disclosure. The present disclosure is described in more detail below. However, the following examples are merely for reference to explain the present disclosure in detail and are not limited thereto, and the present disclosure may be implemented in various forms. Additionally, unless otherwise defined, all technical and scientific terms have the same meaning as generally understood by one of the people skilled in the art to which this disclosure pertains. The terms used in the description herein are merely for the purpose of effectively describing specific embodime