KR102197362B1 - Method for manufacturing permeable reactive barriers and permeable reactive barriers blade rubber for contaminated groundwater purification - Google Patents

Abstract

An objective of the present invention is to provide a permeable reactive barrier for purifying contaminated groundwater, in which a sealing member using extruded rubber made of a high-elasticity material is installed on a reactive barrier to effectively seal a gap between a well and the reactive barrier and elasticity and smooth vertical sliding characteristics, which are the characteristics of the extruded rubber, are utilized, such that the permeable reactive barrier can be replaced and be used for deep groundwater and, at the same time, can solve a problem between sealing and replacement between the well and the sealing, and a method for manufacturing a blade rubber thereof. According to the present invention, a permeable reactive barrier for purifying contaminated groundwater comprises: a permeable reaction barrier including a reaction medium for adsorbing or reacting with pollutants of groundwater for purification of contaminated soil and groundwater; and a sealing member including high-elasticity extruded rubber fitted in the vertical direction at positions divided into quarters on the water-permeable reactive barrier in the circumferential direction.

Description

Method for manufacturing permeable reactive barriers and permeable reactive barriers blade rubber for contaminated groundwater purification}

The present invention relates to a method of manufacturing a water-permeable reaction wall for purifying contaminated groundwater and a water-permeable reaction wall blade rubber, and more particularly, a sealing member using extruded rubber made of a highly elastic material is installed on the reaction wall to provide a space between the well and the reaction wall. Efficiently sealed and replaceable by using the elasticity and vertical sliding characteristics of the extruded rubber, and can be used for deep groundwater, but a permeable for purification of contaminated groundwater that can simultaneously solve the conflicting problems of sealing and replacement between the well and the casing It relates to a method of manufacturing a reactive wall and a water permeable reactive wall blade rubber.

Globally, the pollution of groundwater is intensifying due to the improper handling and disposal of massive amounts of waste and chemicals such as chemicals, oils, pesticides, etc., which are incidental due to the acceleration of industrial development and population growth. The environmental problems caused by this are seriously emerging.

In particular, environmentally harmful soil and groundwater pollution is mainly caused by leakage of oil from oil storage and transport facilities such as oil storage bases, crude oil storage facilities in oil refineries, etc. .

Petroleum compounds (BTEX) in groundwater, which occupy a large proportion of these soil pollutants, contain monocyclic aromatic hydrocarbons such as benznene, toluene, ethylbenzene, and xylene. Among them, gasoline with a high BTEX concentration is the main reason. Oils with high BTEX content flow out to the ground and reach the groundwater surface, becoming a liquid (LNAPL: light non aqueous phase liquid) with a lower specific gravity than water, forming a free phase on the groundwater surface. An average of 60% of BTEX is volatilized and contained in the air, 10% is mixed with soil particles, and the remaining 30% is dissolved and distributed in groundwater. The reason why BTEX substances are classified and regulated as separate items is that each of these substances is highly toxic and relatively high in solubility, making them a major source of groundwater pollution.

Next, as a soil pollutant, oil is TPH (Total Petroleum Hydrocarbons) containing hundreds of chemicals such as gasoline, jet fuel, fuel oils, and tar. have. These chemicals are gas, petroleum ether, gasoline, diesel, residual fuel oil, lubricating oil, and paraffin depending on the boiling point during distillation. ), asphalt, etc. Since these substances have different physicochemical properties, not only human and environmental hazards, but also pollution characteristics and treatment methods are different. Among these oils, gasoline and diesel are the most important substances in soil pollution. Gasoline is different for each use, but it is easy to volatilize under normal temperature and pressure conditions, has high flammability, and there is a possibility of explosive combustion when the vapor is mixed with air in an appropriate concentration range (about 1-7% capacity). The composition is a mixture of liquid hydrocarbons having 5 to 12 carbon atoms, and the mixing ratio of paraffin, olefin and aromatic hydrocarbons is different depending on the manufacturing method and use of gasoline. Of these, toluene, an aromatic hydrocarbon, accounts for a significant amount of gasoline from as little as 45% to as much as 210%. In addition, MTBE, an oxygen-containing chemical substance, is widely used as a gasoline base to increase the octane number and improve the blendability with the product. Diesel is generally a long-chain hydrocarbon mixture having 11 to 16 carbon atoms, and diesel sold at domestic gas stations is mainly saturated hydrocarbons, with aliphatic compounds as the main component. Diesel has a high viscosity compared to gasoline and has low mobility, making it difficult to remove from soil particles, and since oil substances are composed of various individual compounds, it is not easy to quantify.

Among these pollutants in oil, TPH has a boiling point of 150 to 500°C, and is the sum of the concentration of oil compounds over the range of normal alkanes (C8 to C40). Among the TPH components, aliphatic compounds mainly consist of paraffinic hydrocarbons (Alkane), and are formed by arranging chains or branched carbons in various lengths. These single carbon bonds are composed of paraffinic hydrocarbons (Alkane), double bonded olefinic hydrocarbons (Alkene), and triple bonded acetylene-based hydrocarbons (Alkyne). Alkanes are more easily decomposed than Alkenes and Alkynes, and chain-type compounds are more easily decomposed using microorganisms than branch-type compounds. Main Decomposition Reactor With a small β-oxidation, oxygen reacts with the terminal portion of chain-shaped Alkanes to decompose into carboxylic acid, and the two terminal carbons are separated from the molecule. In the case of hydrocarbons having long chains, these reactions are repeated and decomposed. The β-oxidation reaction proceeds until the branches of the hydrocarbon-like molecules are removed. Since short-structured molecules can increase toxicity to many types of microorganisms, biological decomposition of Alkans is easy to decompose compounds composed of at least 10 hydrocarbons. Molecules with a small number of carbon atoms, such as methane, ethane, propane, and butane, exist in the gaseous phase and can be removed by decomposition through metabolism of major substrates. Other enzymatic processes can also be used to decompose Alkanes, Alkenes, Alkynes and alicyclic compounds, but this decomposition process does not occur often and the reaction speed is slow. The anaerobic degradation of aliphatic compounds is limited and does not play a particularly important role in biological degradation processes. Alkene is a mechanism used in Alkane, and the saturated part at the end of the molecule is generally decomposed. Microorganisms such as Candida lipolytica, a type of yeast, act on double bonds to decompose Alkene into Alkane-1,2-diol. In order to decompose in an amount similar to that of Alkane, Alkene must have a longer molecular length than the corresponding Alkane. Many microorganisms cannot grow in Alkenes with fewer than 12 carbon atoms. Molecules having two Alkenes are more likely to decompose methyl groups present at both ends of each molecule than a molecule having one Alkene, so that microbial decomposition can be used.

In addition, as soil pollutants, chlorinated aliphatic hydrocarbons (CAHs) and heavy metals are also included.

A permeable reactive barrier (PRB) is a purifying device used in a purification technology that continuously extracts groundwater contaminated with such soil pollutants, and the permeable reactive wall is a flow path through which contaminated groundwater flows. When the contaminated groundwater passes through the wall, it induces a chemical reaction between the reaction medium and the pollutant, and purifies the pollutant using physicochemical and biological mechanisms such as precipitation, volatilization and biodegradation, adsorption, and oxidation/reduction. This purification technology was first introduced by Mc Murthy and Elton in 1985. It has been actively researched and developed since the 1990s, using permanent, semi-permanent media, and replaceable fillers as reactive wall media. have.

Permeable reactive walls can be classified into continuous permeable reactive barriers and funnel and gates according to their shape (Vidic et al, 1996). Because it does not change, it is possible to remove contaminants while keeping it close to the flow rate of the underground aquifer. As described above, the continuous reaction wall is relatively easy to construct and has the advantage of not affecting the flow of existing groundwater.However, the pollution cloud is very large because the flow of the groundwater on the target site must be made to contact the reaction wall having a sufficient cross-section and size. In this case, it is necessary to consider economic feasibility because the reaction wall must be manufactured according to the size of the polluted cloud. Induction wall-attached reactive walls are economically advantageous because they can reduce the reaction area by inducing the flow of groundwater contaminated zones to the reaction gate by using a funnel with low permeability. Since the contact time with the medium is short, the thickness of the wall must be increased so that sufficient contact can occur. The funnel mainly uses soil-bentonite slurry wall, cement-bentonite slurry wall, slurry wall such as plastic concrete, steel sheet pile, synthetic resin sheet pile, and wood sheet pile.

Induction wall-attached reactive walls can be manufactured and used in various shapes and sizes that can induce pollutants according to site characteristics. In general, the most effective installation angle between the reaction wall and the induction wall attached to the reaction wall is 180°, so that it is installed parallel to both sides of the reaction wall, and the length of the induction wall must be at least 15m to effectively induce the pollutant source. . It is most effective to design/install the guide wall so that it is perpendicular to the groundwater flow direction to guide the pollutant source. In addition, in order to increase the treatment efficiency of the induction wall-attached reactive wall, the shape of the induction wall, the gate system, the size of the induction wall, the size of the groundwater trapping section, and the residence time in the reaction wall should be considered.

Most of the permeable reaction walls are used after installing the groundwater in the horizontal movement. Groundwater contaminated with LNAPL (light nonaqueous phase liquids) naturally moves horizontally due to the hydraulic gradient and meets the permeable reaction walls at a right angle. It gradually passes through the inside of the wall. Contaminants entering the wall are insolubilized by physical, chemical and biological methods. On the contrary, groundwater contaminated with DNAPL (dense non-aqueous phase liquids) is a method of purifying the pollutant by passing the sinking pollutant through the reaction wall. Therefore, the permeable reaction wall for purifying DNAPL must be installed large and deep up to the bedrock layer to include the entire pollutant, and LNAPL moves the pollutant according to the flow of groundwater, so the permeable reaction wall is located at the groundwater level from the surface. Install it in the form of "Hang-up" which is calculated and installed.

On the other hand, various techniques for improving oil pollution purification are currently being studied, and as a representative prior art, high-temperature and medium-temperature air is injected into the aquifer remaining after restoration of high-concentration oil-polluted areas by thermal desorption method. Oil pollutant purification device and purification method to increase biological activity (Patent Registration No. 10-0925292 and Patent Registration No. 10-0798763), microorganisms with oil decomposition capacity separated from oil-contaminated soil are separated and cultured according to the growth rate Microorganisms for purification of oil-contaminated soil that can shorten the purification time of oil-contaminated soil by increasing the decomposition rate of pollutants without deteriorating the activity of microorganisms that have excellent oil decomposition activity but slow growth rate by using one mixed strain. , The method of manufacturing the same and the purification method of oil-contaminated soil using the same (Patent Registration No. 10-1300348), oil-decomposing microbial preparation having excellent oil decomposition ability from the environment contaminated by oil and other hydrocarbon compounds is added to the matrix (draft elvan powder). After inoculation and fixation, it is mixed with over-dried natural organic peat moss to adsorb oil, as well as a biological biodegradable adsorbent that biologically decomposes the adsorbed oil material, and its manufacturing method (Patent Registration No. 10-0455754). It is disclosed.

However, none of the prior art of the prior art has proposed a structure of a permeable reaction wall that allows replacement of the reaction medium, including the reaction wall, and can be used for deeply contaminated groundwater for purification of contaminated soil and groundwater. .

Domestic Patent Registration No. 10-0925292, Soil Contaminant Purification Device and Its Purification Method. Domestic Patent Registration No. 10-0798763, Underground Thermal Desorption Method and Device for Purifying Oil Contaminated Soil. Domestic Patent Registration No. 10-1300348, a microbial liquid composition for purifying oil-contaminated soil, a manufacturing method thereof, and a method for purifying oil-contaminated soil using the same. Domestic Patent Registration No. 10-0455754, Biological biodegradation adsorbent for removing oil and other hydrocarbon compounds, and method for manufacturing the same.

The present invention was conceived to solve the problems of the prior art, and an object of the present invention is to provide a sealing member using extruded rubber made of a highly elastic material on the reaction wall to efficiently seal between the well and the reaction wall and It is replaceable and can be used for deep groundwater by using the characteristics of elasticity and vertical sliding, which are the characteristics of the pipe, but it is a water-permeable reaction wall for purification of contaminated groundwater and water permeability that can simultaneously solve the conflicting problems of sealing and replacement between the well and the casing. It is to provide a method of manufacturing a reactive wall blade rubber.

The present invention for achieving the above object is a permeable reaction wall comprising a reaction medium for adsorbing or reacting pollutants of groundwater for purification of contaminated soil and groundwater; And

It is preferable to include; a sealing member including a highly elastic extruded rubber fitted in a vertical direction at a position divided into quarters along the circumferential direction to the water permeable reaction wall.

The sealing member is: a base containing at least one selected from the group consisting of natural rubber, chloroprene, EPDM (Ethylene propylene diene monomer), NBR (Acrylonitrile butadiene rubber), and silicone rubber Rubber 100 parts by weight, filler 5 to 100 parts by weight, process oil 2 to 50 parts by weight, additive (processing aid) 1 to 10 parts by weight, accelerator 0.5 to 5 parts by weight, anti-aging agent 0.5 to 10 parts by weight, crosslinking agent (crosslinking agent) It is preferably prepared from a rubber compound containing 0.3 to 8 parts by weight.

The rubber compound: It is preferable to include a filler such as carbon black, a white pigment, and an abrasive resin to improve the sealing performance of the sealing member.

A coating layer formed on the surface of the sealing member; further comprising, the coating layer: 100 parts by weight of epoxidized isoprene, 5 to 150 parts by weight of a reactive alkylphenol resin, 1 to 50 parts by weight of a friction lubricant, 0.5 to 50 imidazole It is preferred to be coated with a coating composition containing 2.5 to 20 parts by weight of polyisocyanate and 2 to 20 parts by weight of a fluidizing agent.

The water-permeable reaction wall includes: a cylindrical casing having a hole in the surface thereof; A mesh network installed to surround the outside of the casing to prevent the reaction medium from flowing out, and to prevent foreign substances of contaminated groundwater from entering from the outside; And a fixing part installed at a position divided into quarters along the circumferential direction on the outer circumferential surface of the mesh network to fit and fix the sealing member.

In addition, the present invention for achieving the above object is a vertically divided position along the circumferential direction in a permeable reaction wall case containing a reaction medium for adsorbing or reacting pollutants of groundwater for purification of contaminated soil and groundwater. A method for manufacturing water permeable reactive wall blade rubber that is installed in the direction, a group consisting of natural rubber, chloroprene, EPDM (Ethylene propylene diene monomer), NBR (Acrylonitrile butadiene rubber), and silicone rubber. 100 parts by weight of a base rubber containing at least one selected from, 5 to 100 parts by weight of a filler, 2 to 50 parts by weight of a process oil, 1 to 10 parts by weight of an additive, 0.5 to 5 parts by weight of an accelerator, A first step of preparing a water-permeable reactive wall blade rubber from a rubber compound comprising 0.5 to 10 parts by weight of an anti-aging agent and 0.3 to 8 parts by weight of a crosslinking agent; A second step of chlorinating the water permeable reaction wall blade rubber; 100 parts by weight of epoxidized isoprene, 5 to 150 parts by weight of a reactive alkylphenol resin, 1 to 50 parts by weight of a friction lubricant, 0.5 to 50 parts by weight of imidazole, 2.5 to 20 parts by weight of polyisocyanate, and 2 to 20 parts by weight of a fluidizing agent. A third step of coating the surface of the water-permeable reactive wall blade rubber with a coating composition; And a fourth step of crosslinking the coated surface and then molding it into a final water permeable reaction wall blade rubber.

The third step is: After preparing a compound by mixing an epoxidized isoprene, a reactive alkylphenol resin, a friction lubricant, imidazole, polyisocyanate, and a fluidizing agent, the compound is dissolved in an organic solvent to dissolve the water-permeable reactive wall blade rubber body It is preferable to coat.

According to the manufacturing method of the water-permeable reaction wall and the water-permeable reaction wall blade rubber for purifying contaminated groundwater according to the present invention, a sealing member using extruded rubber made of a highly elastic material is installed on the reaction wall to effectively seal the well and the reaction wall. It can have an effect.

In addition, the present invention can be replaced by using the smooth characteristics of the elasticity and vertical sliding, which are the characteristics of the extruded rubber, and can be used in deep groundwater, but there is also an effect of simultaneously solving the conflicting problems of sealing and replacement between the well and the casing.

1 is a view showing a water permeable reaction wall for purifying contaminated groundwater according to the present invention,
2 is a plan view of the display of FIG. 1,
3 is an enlarged view showing a sealing member provided in the water-permeable reaction wall for purifying contaminated groundwater according to the present invention,
4 is a block diagram of a method of manufacturing a water-permeable reactive wall blade rubber for purifying contaminated groundwater according to the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

Prior to the description of the present invention, the following specific structure or functional descriptions are exemplified only for the purpose of describing embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms. , It should not be construed as being limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can be modified in various ways and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the present specification. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific type of disclosure, and it should be understood that all modifications, equivalents, and substitutes included in the spirit and scope of the present invention are included.

1 is a view showing a permeable reaction wall for purifying contaminated groundwater according to the present invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a sealing member provided in the permeable reaction wall for purifying contaminated groundwater according to the present invention It is an enlarged view showing.

As shown in these drawings, the present invention is preferably configured to include a water-permeable reaction wall 10 and a sealing member 20 for purifying contaminated groundwater.

The water-permeable reaction wall 10 is preferably configured to include a reaction medium for adsorbing or reacting contaminants of groundwater for purification of contaminated soil and groundwater.
In addition, it is preferable that the sealing member 20 has a groove formed in the water-permeable reaction wall 10 so as to be fitted in a vertical direction at a position divided into quarters along the circumferential direction, and includes a highly elastic extruded rubber.

At this time, the water permeable reaction wall 10 has a cylindrical casing 12 with a hole perforated on its surface, and is installed to surround the outside of the casing to prevent the internal reaction medium from flowing out, and foreign substances in the contaminated groundwater from the outside. A mesh net 14 that prevents the inflow of the mesh net 14 and a fixing part 16 provided with a fitting part installed at a position divided into quarters along the circumferential direction on the outer circumferential surface of the mesh net, and fitted to and fixed to the groove of the sealing member 20 ) It is preferable to be configured to include.

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Here, it is preferable to form a coating layer 22 on the surface of the sealing member 20. The surface of the sealing member 20 is modified by the coating layer 22 to improve sealing properties and durability.

According to the present invention, by installing the sealing member 20 to be fitted to the water permeable reaction wall 10, it has a feature that can solve both the two opposite factors of sealing and replacement of the water permeable reaction wall 10. . That is, sealing and replacement can be simultaneously solved by installing the sealing member 20 in four vertical directions.

This sealing member 20 can be smoothly replaced even when the reaction medium is loaded up to 1,000 Kg inside the reaction wall, and contaminated groundwater contacts and flows through the reaction medium, thereby improving the purification efficiency (performance) of contaminated groundwater. It can be improved. That is, by installing the four sealing members 20, the contaminated groundwater can have a structure that passes through the reaction medium, and has the advantage of being replaceable by the elasticity and sliding properties of the sealing member.

4 is a block diagram of a method of manufacturing a water-permeable reactive wall blade rubber for purifying contaminated groundwater according to the present invention.

The present invention relates to a first step (S101) of manufacturing a water-permeable reactive wall blade rubber from a rubber compound, a second step (S102) of chlorinating the water-permeable reactive wall blade rubber, and a water-permeable reactive wall blade as a coating composition. It is preferably manufactured by a method comprising a third step (S103) of coating the surface of the rubber, a step of crosslinking the coated surface, and a fourth step (S104) of forming a final water-permeable reactive wall blade.

At this time, the water permeable reactive wall blade rubber is one selected from the group consisting of natural rubber, chloroprene, EPDM (Ethylene propylene diene monomer), NBR (Acrylonitrile butadiene rubber), and silicone rubber. It can be prepared from a rubber formulation comprising a base rubber comprising the above. Preferably, the rubber compound may be used by blending the ingredients in order to improve the performance of the diene-based rubber.

In addition, the rubber blend may include a filler such as carbon black, white pigment (SiO2), and abrasive resin to improve the sealing performance of the water-permeable reactive wall blade rubber.

In addition, the rubber formulation may include a process oil and a plasticizer to control dispersibility and elastic modulus.

The rubber compound may include a processing aid such as wax and resin for dispersion of the compound, and may include an accelerator or the like to control the rate of crosslinking. The accelerator may preferably be N-Cyclohexyl-2-benzothiazole sulfonamide or tetramethyl-thiuram disulfide.

In addition, anti-aging agents (Antiozonant, Antioxidant) may be included to prevent aging of the water permeable reactive wall blade rubber. The antioxidant is polymerized 2,2,4-trimethyl-1,2-dihydroquinoline (Polymerized 2, 2, 4-trimetyl-1,2-dihydroquinoleine) or N-phenyl-2-naphthylamine (N -phenyl-2-Naphtylamine) and the like may be preferably used.

In addition, as a crosslinking agent for the vulcanization (crosslinking) of rubber, sulfur, peroxide, zinc oxide, alkyl phenol resin, and the like may be included.

In the present invention, the rubber compound includes 100 parts by weight of the base rubber, 5 to 100 parts by weight of a filler, 2 to 50 parts by weight of a process oil, 1 to 10 parts by weight of an additive, 0.5 to 5 parts by weight of an accelerator, and aging. It may contain 0.5 to 10 parts by weight of an inhibitor and 0.3 to 8 parts by weight of a crosslinking agent.

A water-permeable reactive wall blade rubber was prepared from the rubber compound prepared above and chlorinated. The chlorination step can be carried out by a known method, and is not particularly limited in the present invention. Preferably, the chlorination of the surface of the blade rubber may consist of a substitution step, an addition step, and a circulation step.

The chlorinated water-permeable reactive wall blade rubber is treated with a surface-modifying coating composition. The coating composition preferably comprises an epoxidized isoprene, a reactive alkylphenol resin, a friction lubricant, an imidazole, a polyisocyanate and a fluidizing agent. The coating composition thus prepared is dissolved in an organic solvent to form a certain viscosity, preferably 100-3000 cps (brookfield viscometer), and then sprayed on the surface of the water permeable reactive wall blade rubber or immersed in the water permeable reactive wall blade rubber. , To form a coating layer on the water permeable reaction wall blade rubber surface.

The epoxidized isoprene differs in oil resistance, gas barrier, and adhesion according to the epoxy content. In the present invention, the epoxy content is preferably 50%.

In the present invention, the reactive alkylphenol resin is preferably 5 to 150 parts by weight per 100 parts by weight of epoxidized isoprene, and more preferably 50 to 100 parts by weight. Reactive alkylphenol resins are accompanied by abrasion properties of epoxidized isoprene and resin cure.

In the present invention, the friction lubricant may be one selected from the group consisting of graphite, Teflon powder, silicon powder, molybdenum leachate and nylon powder. The friction lubricant may preferably be 1 to 50 parts by weight per 100 parts by weight of epoxidized isoprene, more preferably 1 to 30 parts by weight, more preferably 20 parts by weight is effective in terms of securing performance and preventing precipitation. . In addition, graphite may be preferably used, which is advantageous in terms of securing performance and cost.

Imidazole (Imidazol) can be preferably used 0.5 to 50 parts by weight per 100 parts by weight of epoxidized isoprene as an important component in the present invention. Depending on the composition of the imidazole and the reaction temperature, the amount of use may vary. The present invention induces low-temperature crosslinking (135° C. or lower) for ease of preparation of the compound and prevention of oxidation and aging in the manufacturing process, so latent imidazol may be preferably used, and more preferably 2.5 to 10 parts by weight may be used.

Imidazoles that can be used include imidazole, 2-methylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, and 1,2-dimethylimida Sol (1,2-dimethylimidazole), 2-ethyl-4-methylimidazole (2-ethyl-4-methylimidazole), 2-phenylimidazole (2-phenylimidazole), 2-phenyl-4-methylimida Sol (2-phenyl-4-methylimidazole), 1-benzyl-2-methylimidazole (1-benzyl-2-methylimidazole), 1-benzyl-2-phenylimidazole (1-benzyl-2-phenylimidazole) , 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-undecylimidazole, 1-cyano Ethyl-2-ethyl-4-methylimidazole (1-cyanoethyl-2-ethyl-4-methylimidazole), 1-cyanoethyl-2-phenylimidazole (1-cyanoethyl-2-phenylimidazole), 2, 4-diamino-6-[2'-methylimidazole-(1')]-ethyl-s-triazine (2,4-diamino-6-[2'-methylimidazolyl-(1')]-ethyl -s-triazine), 2,4-diamino-6-[2'-methylimidazole-(1')]-ethyl-s-triazine (2,4-diamino-6-[2'methylimidazolyl-) (1')]-ethyl-s-triazine), 2,4-diamino-6-[2'-undecylimidazolyl-(1')]-ethyl-s-triazine (2,4-diamino -6-[2'-undecylimidazolyl-(1')]-ethyl-s-triazine), 2,4-diamino-6-[2'-methylimidazolyl-(1')]]-ethyl-s -Triazine isocyanuric acid adduct dihydrate (2,4-diamino-6-[2'-methylimidazolyl-(1')]-ethyl-s-triazineisocyanuric acid adduct dehydrate), 2-phenyl -4,5-dihydroxymethylimidazole (2-phenyl-4,5-dihydroxymethylimidazole) and 1-dodecyl-2-methyl-3-benzylimidazolium chloride (1-dodecyl-2-methyl-3 -benzylimidazolium chloride). In addition, modified imidazole may be used, for example, 2-phenylimidazoleisocyanuric acid adduct may be used.

In the above, polyisocyanate is used as an aid for imparting adhesion and crosslinking. Polyisocyanate may be used in an amount of 2.5 to 20 parts by weight per 100 parts by weight of epoxidized isoprene, and preferably 2.5 to 10 parts by weight may be used in consideration of the storage stability of the coating agent. Further, storage by using a blocked polyisocyanate Stability can be dramatically improved.

In the present invention, since the coating composition is prepared in the form of a compound and then dissolved in an organic solvent, a rheology agent may be used for stability of the solution and smooth operation. As a fluidizing agent, polyamide, pre-activated polyamide wax, oxidized polyethylene, calcium sulfornate, hydrogenated caster oil, etc. can be used. 2 to 10 parts by weight per 100 parts by weight of epoxidized isoprene may be preferably used, and more preferably 2 to 5 parts by weight may be used.

The coating composition prepared above can be prepared in the form of a compound using a bannury, kneader, intensice mixer or an open mill, and the prepared compound is dissolved in an organic solvent to dissolve the water-permeable reactive wall blade rubber. It is coated on the surface. As a coating method, a method such as immersion or spraying can be used.

In the above, the organic solvent may preferably be a petroleum solvent, and for example, toluene, xylene, or mineral sprit may be used.

Next, the coated surface of the wiper blade is crosslinked. The crosslinking system of the present invention includes crosslinking of epoxidized isoprene and imidazole.

Crosslinking refers to atmospheric pressure crosslinking in a hot air state, and may be performed at 120°C to 185°C for 2 to 10 minutes. More preferably, it is possible to perform atmospheric pressure crosslinking in a hot air state at 135° C. for about 5 minutes.

When the crosslinking step is completed, the water-permeable reactive wall blade rubber is finally molded.

According to the present invention, by introducing a new crosslinking system and coating the surface of the blade rubber, durability can be secured and sealing properties can be improved.

In particular, the present invention is a method of purifying groundwater contaminated by the sealing member at the original location and preventing the spread of contamination, in applying the water-permeable reaction wall method, it is replaceable and can be used for deep groundwater, but sealing between the well and the casing It can solve the conflicting problem of and replacement. That is, it is possible to simultaneously solve the sealing other than the replacement by the sealing member.

Specifically, by installing a sealing member including extruded rubber made of highly elastic material on the reaction wall, it efficiently seals between the well and the reaction wall, and utilizes the characteristics of elasticity, which is the characteristic of the extruded rubber, and smooth sliding in the vertical direction by groundwater on the contact surface. Replaceable.

The technical task of the present invention is achieved by the technical configuration as described above, and although it has been described by the limited embodiments and drawings, the present invention is not limited thereto, and the present invention by those of ordinary skill in the art to which the present invention pertains. It goes without saying that various modifications and variations are possible within the scope of the technical idea of and the claims to be described below.

10-Water-permeable reaction wall 12-Casing
14-mesh net 16-fixed part
20-sealing member 22-coating layer

Claims (7)

A permeable reaction wall comprising a reaction medium for adsorbing or reacting pollutants of groundwater for purification of contaminated soil and groundwater;
A sealing member having a groove portion formed so as to be fitted in a vertical direction at a position divided into quarters along the circumferential direction of the water-permeable reaction wall, and comprising a highly elastic extruded rubber; And
Including; a coating layer coated on the surface of the sealing member,
The coating layer,
100 parts by weight of epoxidized isoprene, 5 to 150 parts by weight of a reactive alkylphenol resin, 1 to 50 parts by weight of a friction lubricant, 0.5 to 50 parts by weight of imidazole, 2.5 to 20 parts by weight of polyisocyanate, and 2 to 20 parts by weight of a fluidizing agent. Coated with a coating composition,
The water permeable reaction wall,
A cylindrical casing with a hole perforated on the surface;
A mesh network installed to surround the outside of the casing to prevent the reaction medium from flowing out, and to prevent foreign substances of contaminated groundwater from entering from the outside; And
A water-permeable reaction wall for purifying contaminated groundwater, comprising: a fixing part installed at a position divided into quarters along the circumferential direction on the outer circumferential surface of the mesh network, and provided with a fitting part to be fitted and fixed to the groove of the sealing member. .
The method of claim 1,
The sealing member,
100 parts by weight of a base rubber containing at least one selected from the group consisting of natural rubber, chloroprene, EPDM (Ethylene propylene diene monomer), NBR (Acrylonitrile butadiene rubber) and silicone rubber, 5 to 100 parts by weight of filler, 2 to 50 parts by weight of process oil, 1 to 10 parts by weight of additives, 0.5 to 5 parts by weight of accelerator, 0.5 to 10 parts by weight of anti-aging agent, 0.3 crosslinking agent A water-permeable reaction wall for purifying contaminated groundwater, characterized in that produced from a rubber compound containing to 8 parts by weight.
The method of claim 2,
The rubber formulation,
In order to improve the sealing performance of the sealing member, a water-permeable reaction wall for purifying contaminated groundwater, characterized in that it comprises a filler made of carbon black, a white pigment, and an abrasive resin. delete delete delete delete

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