KR100397327B1 - Elution Preventing Composition Of Harmful Material And Method Of Treating Harmful Material By Utilizing The Same - Google Patents

Abstract

Disclosed are an anti-dissolution agent for harmful substances which can treat harmful substances with high efficiency and have little dissolution after treatment, and a method for treating harmful substances using the same. The leaching inhibitor comprises 20 to 60% by weight of quicklime, 10 to 50% by weight of quicklime coated with a surfactant, 10 to 30% by weight of ferric chloride, 10 to 20% by weight of apatite and 10 to 20% by weight of zeolite. It is made to include. By using the above-described dissolution inhibitor, the treatment plant sludge, sewage treatment sludge, heavy metal, waste oil, organic solvent, etc. can be effectively treated, and the reaction products obtained after treatment are hardly eluted by water or acid rain, so that various hazardous substances are treated stably. It is possible to do

Description

Elution Preventing Composition Of Harmful Material And Method Of Treating Harmful Material By Utilizing The Same}

The present invention is harmful by using an elution inhibitor and an elution inhibitor prepared in such a way that it is added to harmful substances such as water purification sludge, sewage treatment sludge and waste oil, organic solvent discharged from laundry, heavy metals, etc. A method of treating a substance.

Recently, as the industry develops, various harmful substances are generated, including industrial waste discharged from various factories. Such harmful substances include water purification plant sludge, sewage treatment sludge, heavy metals, waste oil, organic solvents, and the like, which are generally processed as follows. Water purification sludge and sewage treatment sludge are mostly dumped at sea, and waste oil and organic solvents are incinerated and heavy metal sludge is buried in landfills.

However, this treatment method is not environmentally friendly because it is not able to remove the harmful substances fundamentally, causing secondary environmental pollution, and eventually causes secondary environmental pollution.

In order to solve the above problems, Korean Patent No. 96-4748 discloses an immobilization treatment agent for industrial waste and a method of treating the same. The immobilization treatment agent disclosed in the patent includes powdered quicklime, silicate, gypsum, magnesium oxide, slag fine dust, water-soluble high molecular substance and the like coated with a surface portion, and when used, oil, polychlorinated oil contained in industrial wastes can be used. It is described that heavy metals such as biphenyl, cadmium, mercury and chromium can be immobilized and treated as a stable waste.

The working principle of such an immobilization treatment agent is as follows. First, the quicklime reacts with water to generate an exothermic reaction, and the surfactant is separated from the quicklime coated with the surfactant by the heat generated in the exothermic reaction, and at the same time, the sodium silicate reacts with the water to give silica and give porosity. Heavy metals and oils are physically adsorbed and removed. However, according to the above patent, since heavy metals and oils are physically adsorbed on the porous silica gel, there is a problem that the bonding strength is weak and easily eluted.

In addition, most of sodium silicate has 5-7 water molecules attached, and when mixed with quicklime for 2 to 3 days, the quicklime hydrates slowly and loses about 60% of the quicklime's ability. there is a problem. Therefore, the water molecules attached to the sodium silicate must be removed by heating. However, if the heating time and temperature is slightly different, the ability of sodium silicate is lost, so it is costly to manufacture and it is difficult to control the reaction.

In addition, when looking at the surfactant coated on the quicklime, fatty acids such as stearic acid and palmitic acid are nonionic lipophilic surfactants and the rest are ionic surfactants. Nonionic lipophilic surfactants react well with oil but do not have functional groups adsorbed on quicklime and silicate gels, so they are physically immobilized therein and are easily eluted by water. In addition, since most of the ionic surfactants are well dissolved in water, oil components cannot be easily fixed, and even if the ionic surfactant is immobilized, the ionic surfactant is easily eluted in water.

Other surfactants described as usable include nonylphenylpolyglycol and fatty alcohol polyglycol ether. Since there are many kinds of these compounds, various materials having hydrophilicity and lipophilic properties vary depending on the molecular weight and the functional group. It is included. Accordingly, there are things that react with and do not react with oil components. Therefore, there is a problem that not all compounds of the general name are suitable for removing oils.

It is an object of the present invention to solve the problems included in the above technology to provide a dissolution inhibitor capable of treating various harmful substances with high efficiency and preventing the harmful substances from being eluted again from the treated materials.

Another object of the present invention is to provide a method for easily treating a hazardous substance using the above-described dissolution inhibitor.

In order to achieve the above object of the present invention, in the present invention, 20 to 60% by weight of quicklime, 10 to 50% by weight of quicklime coated with surfactant, 10 to 30% by weight of ferric chloride, 10 to 20% by weight An agent for preventing the elution of harmful substances including apatite and 10 to 20% by weight of zeolite is provided.

In particular, the surfactant is preferably a nonionic surfactant having a copolymer structure having a lipophilic group and a hydrophilic group, and more preferably polyoxyethylene nonylphenylether is used.

In addition, in the quicklime coated with the surfactant, the amount of the coated surfactant is preferably in the range of 20 to 30% by weight of the quicklime, and the ferric chloride, apatite, and zeolite may use by-products produced in an industrial site. .

When the harmful substance is purified sludge, sewage sludge, heavy metals, etc., the dissolution inhibitor is 40 to 60% by weight of quicklime, 10 to 20% by weight of surfactant coated with quicklime, 10 to 30% by weight of ferric chloride, 10 It is easily used to include -20 wt% apatite and 10-20 wt% zeolite, and when the harmful substance is oil, waste oil, organic solvent, etc., the dissolution inhibitor is 20-40 wt% quicklime, 20 It can be readily used to include quicklime coated with -50 wt% surfactant, 10-20 wt% ferric chloride, 10-20 wt% apatite and 10-20 wt% zeolite.

Another object of the present invention described above

Hazardous substances including 20 to 60 wt% quicklime, 10 to 50 wt% quicklime coated with surfactant, 10 to 30 wt% ferric chloride, 10 to 20 wt% apatite and 10 to 20 wt% zeolite And mixing and stirring the elution inhibitor in a range of 1: 0.3 to 1.5 by weight ratio of harmful substances such as purified water sludge, sewage sludge, heavy metals, oils, organic solvents, etc., under water conditions. It is achieved by a method for treating harmful substances using a dissolution inhibitor, characterized in that the components cause chemical reaction with the harmful substances and fix the harmful substances so as not to elute.

The mixing ratio of the leaching inhibitor and the harmful substance is preferably in the range of 1: 0.3 to 1.5 by weight. After mixing the dissolution inhibitor and the noxious substance, if water is not included in the noxious substance, the step of adding water is further performed. In this case, the amount of water is in the range of 10 to 35% by weight of the dissolution inhibitor. desirable.

In the present invention, by using a novel dissolution inhibitor is to treat the harmful substances in an environmentally friendly way to block the path causing secondary pollution. In particular, water treatment plant sludge, sewage treatment sludge, etc., can be treated to be used as lime fertilizer or cover soil, and heavy metal-containing sludge can be used as cover soil for landfill. Organic solvents discharged from waste oil, laundry, etc. can hardly dissolve organic solvents. So that it can be reclaimed.

Hereinafter, the present invention will be described in detail with the working principle.

The present invention is a quick lime, ferric chloride, porous apatite and zeolite uniformly coated with a surfactant consisting of a copolymer having a quicklime, a hydrophilic group and a hydrophobic group to harmful substances such as heavy metals and organic solvents contained in industrial waste After the addition of the leaching agent containing a water is added to the water by stirring rapidly to treat the hazardous substances. In this case, when water is included in the hazardous substances, the amount of water added separately may be reduced or no water may be added at all.

According to this treatment, first, the quicklime without the copolymer is hydrated to cause an exothermic reaction, and then the copolymer coated on the surface of the quicklime is separated by the heat of reaction to expose the quicklime inside and the exposed quicklime to hydrate 2 In turn, an exothermic reaction occurs. Quicklime is a common name for calcium oxide, which reacts with water to produce high temperatures and becomes calcium hydroxide.

The amount of quicklime added is in the range of 20 to 60% by weight based on the total amount of the dissolution inhibitor.If the amount of the added lime is less than 20% by weight, the exotherm does not occur well. Due to the reduced amount of ferric chloride and other ingredients added, it is not possible to easily handle the hazardous substances. Therefore, the addition amount thereof is in the above range.

Ferric chloride (FeCl ₃ ) and heavy metals react with poorly soluble ferrite (MFe ₂ O) by the first heat of reaction (60-100 ° C) and the second heat of reaction (120-160 ° C) generated when quicklime reacts with water to hydrate. ₄ ) form the structure. It is immobilized in the porous apatite (3CaO 3P ₂ O ₅ OH) and zeolite. Through this mechanism, heavy metals are immobilized.

Oils, organic solvents, and the like are fixed by forming chemical bonds with the copolymers used in the present invention at temperatures of 100 ° C. or higher, into the pores of quicklime, apatite, zeolites, and chemical bonds.

At this time, the copolymer surfactant preferably used is a nonionic surfactant having a polyoxyethylene nonylphenyl ether structure. Looking at the structure of this compound in detail, the polyoxyethylene group is a hydrophilic group, the nonylphenyl ether group is a hydrophobic group. In the polyoxyethylene group, when the number of oxyethylene groups (n) is high, it becomes water-soluble, and when the number of oxyethylene groups (n) is small, it becomes lipophilic. The number of oxyethylene groups most suitable for application to the present invention is n It is surfactant of a lipophilic copolymer of about 4-11.

When polyoxyethylene nonylphenyl ether enters an organic solvent such as oil contained in industrial waste at a temperature of 100 ° C. or higher, the nonylphenyl ether group reacts with a chemical bond with an organic solvent, and the polyoxyethylene group, which is a hydrophilic group, has a hydrophilic group Ca. In other words, the Fe surface is chemically bonded rather than physically bonded. Due to this phenomenon, organic solvents such as oil form tight chemical bonds with the copolymer, so that once combined, the separation does not occur easily. In addition, the copolymer forms chemical bonds with the quicklime, apatite, and zeolite surface, so that the copolymer is adsorbed into the pores of the apatite and zeolite having a porous structure so that no dissolution phenomenon occurs afterwards.

In addition, the quicklime coated with the surfactant may be prepared by mixing and stirring the quicklime with a surfactant in the range of 20 to 30% by weight of quicklime. Coating the quicklime with a surfactant in advance in this way is also preferable because it prevents the hydration of quicklime and there is no burden of storing the surfactant separately. Above all, the primary hydration reaction is inhibited by the surfactant coated on the surface of quicklime, but when the surfactant is melted by the heat generated by the quicklime which is not coated with the surfactant, the secondary hydration reaction is caused by the exposed quicklime It is generated and it becomes possible to maintain high temperature for a long time. According to the repeated experiments of the present inventors, a high temperature of 100 ° C. or more is maintained for about 20 to 30 minutes, thereby facilitating easy reaction between ferric chloride and harmful substances.

Thus, the amount of quicklime coated with the surfactant should be reduced when the amount of organic matter is small in the harmful substances and increased when the amount of organic matter is large, but it is 10 to 50 wt. It should be in the range of%. If the addition amount thereof is less than 10% by weight, the secondary exotherm does not sufficiently occur, and if the addition amount thereof is more than 50% by weight, the amount of other components is reduced so that the treated reactant is not easily adsorbed. Therefore, the amount of quicklime coated with the surfactant is in the above range.

The following formulas (1), (2) and (3) are formulas showing a process in which heavy metals react with ferric chloride to form poorly soluble ferrite.

_{CaO + H 2 O → Ca (} OH) 2 + OH - (1)

2FeCl ₃ + M ²⁺ (heavy ^{metal) + OH - → 2Fe (OH} ) 3 + M (OH) 2 (2)

2Fe (OH) ₃ + M (OH) ₂ → MFe ₂ O ₄ (3)

MFe ₂ O ₄ produced at this time is a poorly soluble black substance, insoluble insoluble in water, and very stable insoluble in acids.

At this time, the surfactant contained in the elution inhibitor plays a role of fixing the organic matter contained in the heavy metal sludge, and the surfactant absorbed the organic material chemically bonds to the surface of calcium and iron and has pores of apatite and zeolite having porosity. It is absorbed evenly into the stomach.

The amount of the ferric chloride added in such a dissolution inhibitor is in the range of 10 to 30% by weight, based on the total amount of the dissolution inhibitor. If the amount thereof is less than 10% by weight, the heavy metal in the harmful substance may not be sufficiently removed, and if the amount thereof exceeds 30% by weight, the amount of the porous substance is reduced to make it difficult to sufficiently adsorb the treated material. If the amount of heavy metals contained in the hazardous substances is high, increase the amount of the dissolution inhibitor used for its treatment.

Considering the composition of each component described above, the amount of the apatite and zeolite, which are porous materials for adsorbing the reactants obtained after the treatment, may be in the range of 10 to 20% by weight, respectively, based on the total amount of the dissolution inhibitor.

The ferric chloride, apatite and zeolite used in the present invention may also use by-products produced in the industrial field. That is, the ferric chloride may use a byproduct obtained from a steel factory, the apatite may use a byproduct produced in an electronic factory, and the zeolite may use a by-product damaged in the process of making a heat insulating material using zeolite. As a result, many of the components used in the preparation of the leaching inhibitor of the present invention are recycled and can be obtained at low cost.

On the other hand, the dissolution inhibitor according to the present invention may vary slightly the component ratio depending on the kind of harmful substances to be treated, and also depending on the type and specific content of the specific harmful components contained in the hazardous substances. When divided into components (composition 1) that can treat purified water sludge, sewage sludge, heavy metals and the like (components 2) that can treat oils, organic solvents, etc., the composition of each component is as follows.

<Composition 1>

Quicklime 40-60 wt%

10 to 20% by weight quicklime coated with surfactant

Ferric Chloride 10-30 wt%

10-20 wt% apatite

10 to 20 wt% zeolite

<Composition 2>

Quicklime 20-40 wt%

20-50% by weight of quicklime coated with surfactant

Ferric Chloride 10-20 wt%

10-20 wt% apatite

10 to 20 wt% zeolite

Hereinafter, the present invention will be described in detail through specific examples.

<Example 1>

50 g of quicklime, 15 g of quicklime coated with polyoxyethylene nonylphenyl ether surfactant, 15 g of ferric chloride, 10 g of apatite, and 10 g of zeolite were mixed to prepare an elution inhibitor.

60 g of the prepared leaching inhibitor was added to 20 g of wastewater containing heavy metals such as Hg, Cd, Cu, Cr, As, and Mn, followed by vigorous stirring for 30 minutes.

The following experiment was carried out to investigate the elution characteristics of the resulting reactants.

(1) 50 ml of distilled water was added to 10 g of the reactant, placed in a constant temperature shaker and sludged for 1 hour, and then filtered and analyzed for eluted heavy metal ions using ICP.

(2) To investigate the elution characteristics against acid rain, 50 ml of acidic solution with pH = 4 was added to 10 g of the reactant, and the mixture was shaken for 1 hour in a constant temperature shaker, followed by analysis of heavy metal ions in the filtrate using ICP. .

Table 1 shows the results of the elution experiment of the obtained reactant with distilled water, and Table 2 shows the results of the elution experiment with acidic water of pH = 4.

Results of Dissolution Test with Distilled Water Types of Pollutants Contaminant Concentration (ppm) Concentration after treatment (ppm) Hg 48 Not detected CD 86 Not detected Cu 64 Not detected Cr 78 Not detected As 4.2 Not detected Mn 46 Not detected COD 150 7.2

Dissolution test with acidic water with pH = 4 Types of Pollutants Contaminant Concentration (ppm) Concentration after treatment (ppm) Hg 48 Not detected CD 86 Not detected Cu 64 Not detected Cr 78 Not detected As 4.2 Not detected Mn 46 Not detected COD 150 8.7

As can be seen in Table 1 and Table 2, using the dissolution inhibitor prepared in the present invention can remove the heavy metals and COD contained in the waste water with excellent performance, and it can be confirmed that the eluted by the distilled water and acid rain hardly. . Thus, it can be seen that the reaction will not cause secondary environmental pollution when used for applications such as covering agents.

<Example 2>

50 g of quicklime, 15 g of quicklime coated with polyoxyethylene nonylphenyl ether surfactant, 15 g of ferric chloride, 10 g of apatite, and 10 g of zeolite were mixed to prepare an elution inhibitor.

60 g of the prepared leaching inhibitor was added to 100 g of the sludge discharged from the water purification plant, and 20 ml of water was added thereto, followed by rapid stirring. After stirring rapidly for 20 minutes, and left for about 10 minutes, an exothermic reaction of about 120-150 ° C. resulted in complete evaporation of water. At this time, the color of the reactant obtained was ocher color, the moisture evaporated completely by the heat of reaction and existed in the form of a dry cake.

The following experiment was carried out to investigate the elution characteristics of the resulting reactants.

(1) 50 ml of distilled water was added to the purified water sludge and 10 g of the reactants, and the mixture was placed in a constant temperature shaker and shaken for 1 hour, followed by filtration.

(2) To investigate the elution characteristics against acid rain, add 50 ml of acidic solution of pH = 4 to water sludge and reactant 10g each, put it in a constant temperature shaker, shake for 1 hour, and then filter and remove COD, BOD and heavy metal ions. Analyzed.

Table 3 shows the results of the dissolution experiments before and after the treatment plant sludge was treated with the dissolution inhibitor.

Test Items Value before processing (ppm) Value after processing (ppm) Distilled water pH = 4 Distilled water pH = 4 COD 44 80 4.5 6.5 BOD 34 68 0.3 1.5 Pb ND ND ND ND Cr 0.0051 0.0063 ND ND Cu 0.2084 0.2576 ND 0.0357 CD ND ND ND ND

As can be seen from the results of Table 3, the elution inhibitor prepared by the present invention is excellent in the removal performance of organic matter and heavy metals contained in the water treatment plant sludge, and it is understood that almost no elution occurs in distilled water and acid rain from the reactants obtained after treatment. Can be. The resulting reactants can be used for a variety of purposes, especially as landfills for landfills and industrial wastes.

<Example 3>

A leaching inhibitor was prepared by mixing 35 g of quicklime, 35 g of quicklime coated with a polyoxyethylene nonylphenyl ether surfactant, 10 g of ferric chloride, 10 g of apatite, and 10 g of zeolite.

200 g of the prepared leaching inhibitor was added to 100 g of industrial waste containing engine oil, transformer oil, and organic solvent discharged from the laundry, followed by rapid stirring after adding 60 ml of water. After stirring rapidly for 30 minutes and left for about 20 minutes, an exothermic reaction of about 130 to 160 ° C. occurs and the water evaporates completely. At this time, the color of the reaction product was gray and existed in the form of a dry cake due to the evaporation of water.

The following experiment was carried out to investigate the elution characteristics of the resulting reactants.

(1) 50 ml of distilled water was added to 10 g of the reactant, placed in a constant temperature shaker, shaken for 1 hour, filtered, and analyzed for oil components eluted using normal hexane extraction and gas chromatography according to the pollution process test method.

(2) To investigate the elution characteristics against acid rain, add 50 ml of acidic solution of pH = 4 to 10 g of the reactant, put it in a constant temperature shaker, shake for 1 hour, filter it, and then filter it with normal hexane extraction and gas chromatography according to the pollution process test method. The oil component was analyzed using chromatography.

Type Eluate Distilled water (ppm) pH = 4 acidic water (ppm) Engine oil 0.5 1.2 Insulation oil 0.5 1.8 Organic solvent 0.6 1.5

As can be seen from the results of Table 4, the use of the dissolution inhibitor prepared by the present invention is excellent in the removal performance of oil and organic solvents, it can be confirmed that almost no elution by distilled water and acid rain.

Hereinafter, the same experiment as in Example 1 shown in the above patent was performed for comparison with the industrial waste immobilization treatment agent shown in the prior art Korean Patent No. 96-4748.

Comparative Example 1

90% by weight of powdered quicklime sprayed and coated with a surfactant

Gypsum 2% by weight

Magnesium oxide 1% by weight

Industrial waste immobilization treatment agent was prepared to have the above composition. After the immobilization treatment agent was prepared, an experiment was performed to remove heavy metals and oil after storing 1 hour, 24 hours, 48 hours, and 72 hours. In order to remove heavy metals and oil using the immobilizing agent after 24 hours, the experiment was performed by the method described in the cited patent, but the maximum exothermic temperature was only 60 ° C. when the quicklime was hydrated. After 48 hours had elapsed, no exothermic reaction occurred at 50 ° C. and after 72 hours had elapsed.

In Table 5 below, the results of tests with acidic water having a pH = 4 using the elution inhibitor prepared according to Example 1 and the immobilization treatment agent after 1 hour after the preparation according to Comparative Example 1 were shown.

Dissolution test with acidic water with pH = 4 Types of Pollutants Contaminant Concentration (ppm) Concentration after treatment (ppm) Example 1 Comparative Example 1 Hg 48 Not detected 0.2 CD 86 Not detected 1.8 Cu 64 Not detected 1.5 Cr 78 Not detected 1.9 As 4.2 Not detected 0.2 Mn 46 Not detected 1.1 COD 150 8.7 20.6

As can be seen from the results of Table 5, the use of the dissolution inhibitor according to the present invention shows better results than the use of the immobilization treatment agent according to the comparative example.

In addition, as a result of testing with distilled water using the immobilization treatment agent prepared according to Comparative Example 1 after 1 hour has elapsed, it was confirmed that contaminants were not eluted from distilled water. Thus, when the immobilization treatment agent according to the comparative example is used, contaminants are not eluted in distilled water, but contaminants are eluted in acidic water at pH = 4.

As mentioned above, it is thought that MSiO ₃ reacted with heavy metals is a chemically unstable reactant, so it is eluted when the acid concentration is increased. Therefore, when the reactant treated with the immobilization treatment agent according to Comparative Example 1 is embedded in the landfill, it is predicted that it will not endure acid rain.

In addition, a comparative experiment for oil and an organic solvent was also performed, and the immobilization treatment agent according to Comparative Example 1 was confirmed that the concentration of contaminants eluted at pH = 4 is higher than that of the present invention. As mentioned above, since the surfactant coated on quicklime has only a lipophilic group or an ionic surfactant, it is physically adsorbed when adsorbed to quicklime and silicate gel after reacting with an oil component. It is understood that it is.

Compared with these citations, the elution inhibitor of the present invention is excellent in shelf life because the quicklime does not hydrate at all even after long-term storage. In addition, the treated heavy metal is not a physical reaction but chemically reacts with ferric chloride to form a poorly soluble ferrite, so that it is hardly eluted. In addition, in nonionic surfactants having a copolymer structure added to remove oil components and organic substances, lipophilic groups react with oils and organic substances, and hydrophilic groups react with physicochemical adsorption with quicklime, apatite, and zeolites. This hardly elutes.

As described above, using an elution inhibitor prepared by mixing a material such as quicklime, a surfactant, ferric chloride, apatite, and zeolite in an appropriate ratio, it is possible to effectively clean water sludge, sewage treatment sludge, heavy metals, waste oil, organic solvent, and the like. It can be processed.

In particular, the dissolution inhibitor prepared according to the present invention has high removal efficiency of organic matters and heavy metals, waste oils and organic solvents, and the organic matters and heavy metals, waste oils and organic solvents thus removed are not eluted by water or acid rain. have.

In addition, according to the present invention, since by-products in various industrial sites can be used, not only the processing cost is low, but also some of them can be recycled without causing secondary environmental pollution.

Although the present invention has been described above according to an embodiment of the present invention, it will be apparent to those skilled in the art that various modifications may be made without departing from the spirit of the present invention.

Claims (11)

Hazardous substances including 20 to 60 wt% quicklime, 10 to 50 wt% quicklime coated with surfactant, 10 to 30 wt% ferric chloride, 10 to 20 wt% apatite and 10 to 20 wt% zeolite Dissolution inhibitor. The agent of claim 1, wherein the surfactant is a nonionic surfactant having a copolymer structure having a lipophilic group and a hydrophilic group at the same time. The method of claim 1 wherein the surfactant is a polyoxyethylene nonylphenylether (polyoxyethylene nonylphenylether) characterized in that the elution inhibitor of harmful substances. The method of claim 1, wherein in the quick-lime coated with the surfactant, the amount of the coated surfactant is in the range of 20 to 30% by weight of quicklime, the leaching agent of harmful substances. The method of claim 1, wherein the ferric chloride, apatite and zeolite are leaching inhibitors of harmful substances, characterized in that the by-products produced in the industrial field. The method of claim 1, wherein the harmful substances include purified sludge, sewage sludge and heavy metals, wherein the dissolution inhibitor is a quick lime of 40 to 60% by weight, quicklime coated with 10 to 20% by weight of surfactant, 10 to 30 weight A dissolution inhibitor for harmful substances, comprising% ferric chloride, 10-20% by weight apatite and 10-20% by weight zeolite. The method of claim 1, wherein the harmful substances include oil, waste oil and organic solvent, the dissolution inhibitor is 20 to 40% by weight of quicklime, quicklime coated with 20 to 50% by weight of surfactant, 10 to 20% by weight Ferric chloride, 10 to 20% by weight of apatite and 10 to 20% by weight of zeolite. And mixing and stirring the dissolution inhibitor according to claim 1 under a water condition such as water purification sludge, sewage sludge, heavy metals, oils, organic solvents, and the like, in a ratio of 1: 0.3 to 1.5 by weight. A method of treating a hazardous substance using a dissolution inhibitor according to claim 1, wherein the components of the dissolution inhibitor are chemically reacted with the noxious substance to fix the harmful substance so as not to dissolve. delete 9. The method of claim 8, further comprising the step of stirring by adding water to the mixture. 11. The method of claim 10, wherein the amount of water added is in the range of 10 to 35% by weight of the dissolution inhibitor.