KR101641859B1 - Adsorbent using waterworks sludge and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an adsorbent using purified water sludge, and more particularly, to an adsorbent using purified water sludge and coating a positively charged substance to adsorb and remove harmful substances or bacteria caused by pores, The adsorbent can be adsorbed and removed by the potential difference, and a production method thereof.

Description

TECHNICAL FIELD [0001] The present invention relates to an adsorbent using purified water sludge,

The present invention relates to an adsorbent using purified water sludge, and more particularly, to an adsorbent using purified water sludge and coating a positively charged substance to adsorb and remove harmful substances or bacteria caused by pores, The adsorbent can be adsorbed and removed by the potential difference, and a production method thereof.

In Korea, the main stages are through the intake and withdrawal pond - gypsum - withdrawal pumping station - ozone treatment - embankment - admixture - sedimentation - filter paper - ozone treatment - granular activated carbon filter paper - cleansing pond - pumping station - reservoir - demand site.

The effluent treatment in such a water treatment plant is mainly the washing effluent of the discharged sludge and filter paper of sedimentation basin, and its constituents are mostly suspended solids, soluble substances and coagulants in the raw water. These are mostly inorganic components, but organic matter content is gradually increasing due to progress of pollution and eutrophication of rivers.

Sludge generated in a series of processes to remove raw water impurities consists of sand, silt, organic matter in the solution, suspended matter, ions causing hardness, bacteria and organisms, and other substances that degrade the water quality produced. The water treatment plant sludge contains 35 to 50% of SiO ₂ and 20 to 30% of Al ₂ O ₃ as an inorganic substance, although there are various differences in composition depending on the treatment method and kind and amount of compound used.

As of the end of 2008, the average number of sludge generated at the water treatment plant in Korea is 1,800 tons per day. The number of water sludge is continuously increasing due to the expansion of the water treatment plant, the increase of the water supply rate and the introduction of the advanced water treatment plant. Most of these treatments have relied on landfill and marine dumping, but they have problems such as difficulty in securing new sites due to saturation of existing landfill sites, complaints due to leachate discharge, etc., and since the maritime dumping is prohibited in 2007 under the London Convention As the need for new sludge treatment is rising, it is urgently required to develop eco-friendly and economical sludge recycling technology.

Currently, water sludge is recycled as a construction material composition, a tile material and an adsorbent. Among them, the method used as the adsorbent activates the water sludge almost to adsorb and remove harmful components through the porous body.

In a functional adsorbent using purified water sludge of Korean Patent No. 10-1200629 (registered on November 6, 2012, hereinafter referred to as 'Prior Art 1') and a method for producing the same, the surface of the purified water sludge is modified with phosphoric acid or sulfuric acid, A method of preparing an adsorbent powder by preparing an adsorbent powder, mixing it with gelatinous starch, kneading it, and shaping it into pellets.

The adsorbent and the surface-modified adsorbent using purified water sludge of Korean Patent Laid-Open No. 10-2014-0056650 (published on May 04, 2014, May 12, 2014) react with purified water sludge and phosphoric acid to modify the surface, And a method of manufacturing an adsorbent which is activated by forming pores is proposed.

Thus, the prior art documents 1 and 2 both disclose only a method for improving the adsorbability by modifying the purified sludge.

However, since the conventional adsorbent has a low adsorption / removal rate for a substance smaller than pores, it is necessary to study a new method for preparing an adsorbent and a production method thereof.

Korean Registered Patent No. 10-1200629 (Registered on November 6, 2012): Functional adsorbent using purified water sludge and manufacturing method thereof Korean Patent Laid-Open No. 10-2014-0056650 (published on May 12, 2014): Adsorbent using purified water sludge and surface modified adsorbent

Accordingly, the adsorbent using the purified water sludge of the present invention and the method for producing the same,

The object of the present invention is to provide an adsorbent capable of simultaneously providing adsorption by porous and potential difference of positively charged substances by coating mixed positively charged substances by removing mixed impurities including organic substances by heating mixed sludge and limestone.

According to an aspect of the present invention, there is provided an adsorbent using purified water sludge,

The activated sludge mixed with water sludge and limestone is carbonized, and the carbonized sludge is coated with a positive charge material.

The adsorbent has a size of 0.01 to 3 mm by carbonizing activated sludge mixed with 5 to 20 parts by weight of limestone with respect to 100 parts by weight of purified water sludge and coating with 0.01 to 5 parts by weight of positively charged substance with respect to 100 parts by weight of carbonized sludge.

Wherein the activated sludge is further formed by mixing 0.001 to 0.2 parts by weight of a metal or a metal oxide with respect to 100 parts by weight of purified water sludge; The metal or metal oxide may be at least one selected from the group consisting of Y, Mo, Bi, Tel, Mn, Cob, (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au) and aluminum (Al).

In addition, the positive charge material may be coated with one or more selected from the group consisting of chitosan and quaternary ammonium.

According to another aspect of the present invention, there is provided a method for producing an adsorbent using purified water sludge,

A first step of mixing activated sludge with limestone and stirring to produce activated sludge; A second step of carbonizing the organic material by using a sintering furnace to produce activated sludge; A third step of dissolving the positive charge material in a solvent to prepare a positive charge material dissolution solution; A fourth step of mixing the carbonized sludge of the second step with the positive charge material solution of the third step and then stirring the mixture; And a fifth step of charging the agitated product of the fourth step with an oven and drying it to prepare an adsorbent coated with a positively charged substance on the carbonated sludge.

In the first step, the activated sludge is prepared by mixing 5 to 20 parts by weight of limestone with respect to 100 parts by weight of purified water sludge; In the second step, the sintering temperature of the sintering furnace is 400 to 600 ° C., and the sintering is performed for 1 to 3 hours to produce carbonized sludge; In the third step, the solvent is a solution containing water or acid, and the positive charge substance is dissolved in a solvent such that 0.01 to 5 parts by weight of the positive charge substance is coated on 100 parts by weight of the carbonized sludge; Stirring in the fourth step is carried out for 30 minutes to 2 hours; In the fifth step, drying may be performed in an oven at 100 to 180 ° C for 1 to 2 hours.

The first step may include mixing 0.001 to 0.2 parts by weight of metal or metal oxide with respect to 100 parts by weight of the purified sludge.

In the adsorbent using the purified water sludge of the present invention and the method for producing the same,

The present invention relates to a sludge treatment method and a sludge treatment method for treating a sludge by using an activated sludge and a sludge treatment method, It is possible to provide an adsorbent capable of improving the filtration performance of contaminants of various sizes by adsorbing and removing fine contaminants smaller than pores by a potential difference.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing a process for producing an adsorbent according to an embodiment of the present invention; FIG.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the embodiments are only illustrative of the contents and scope of the technical idea of the present invention, and the technical scope of the present invention is not limited or changed. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples.

FIG. 1 is a flowchart illustrating an adsorbent manufacturing process according to an embodiment of the present invention.

Referring to FIG. 1, a method for manufacturing an adsorbent using purified water sludge according to the present invention will be described.

In the first step, purified sludge and limestone are mixed and stirred to produce activated sludge.

The general composition of the purified water sludge is composed of an inorganic material including an inorganic material including 35 to 50% of SiO ₂ and 20 to 30% of Al ₂ O ₃ , and a porous limestone is mixed to increase the surface area to increase the activity To produce activated sludge.

At this time, the mixture ratio of the purified sludge and limestone is preferably 5 to 20 parts by weight of limestone mixed with 100 parts by weight of the purified sludge. When the limestone is mixed in an amount of less than 5 parts by weight, the increase of the surface area is insufficient. When the limestone is mixed in more than 20 parts by weight, it is important to maintain the proposed mixing ratio because the reduction performance of adsorption by limestone occurs.

10 to 20 parts by weight of water may be further added to 100 parts by weight of the total weight in order to uniformly mix the purified sludge and the limestone.
When the stirring time is short, mixing of the purified water sludge and the limestone is not performed uniformly.

In this step, activated sludge can be prepared by further mixing metal or metal oxide to increase the antimicrobial activity against microorganisms, bacteria or viruses.

Examples of the metal or metal oxide include yttrium (Y), molybdenum (Mo), bismuth (Bi), tellurium (Te), manganese (Mn), cobalt (Co), rhodium (Rh), iridium (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au) and aluminum (Al).

The metal or metal oxide is preferably used in an amount of 0.001 to 0.2 part by weight based on 100 parts by weight of purified water sludge. When the amount is less than 0.001 part by weight, the antibacterial properties are insufficient. When the amount is less than 0.2 parts by weight, the effect of increasing the antibacterial activity is increased. However, since the metal or metal oxide forms a high price, Is preferably used.

In the second step, activated sludge is heated in a sintering furnace to carbonize the organic material to produce carbonized sludge.

The sintering temperature is 400 to 600 ° C. and the sintering time is 1 to 3 hours to heat the organic material contained in the activated sludge to carbonize the sludge. Some of the components of the purified sludge constituting the activated sludge are melted and combined with the adjacent components by the firing, so that the carbonized sludge is produced in the form of granules having a particle diameter of 0.01 to 3 mm.

If the calcination temperature is below 400 ° C., the drying and carbonization time of the activated sludge is long. If the calcination temperature is 600 ° C. or more, the drying and carbonization time can be shortened. However, And the particle size of the granules is excessively increased, so that it is preferable to add the above range.

In addition, in the calcination process, limestone (CaCO ₃ ) receives heat and changes into porous lime (CaO) while discharging carbon dioxide gas. In this process, the surface area is further increased. Also, some of the quicklime is combined with the silicic acid component of the purified water sludge to change into calcium silicate (3CaO ₄ SiO ₂ , 2CaO ₄ SiO ₂ ), and then when the water is mixed, the crystallization is performed and the strength is increased to granulate the carbonated sludge have.

The carbonized sludge in this step means a powder or a granule having a particle diameter of 0.01 to 3 mm, but not limited thereto, and it may include a powder or a granule having a particle diameter of 0.01 mm or less. However, it is difficult to handle, It is preferable to use those having a grain size of 0.01 to 3 mm and having a grain size of 90% or more with respect to the total amount.

The third step is to dissolve the positive charge substance in the solvent to prepare the positive charge substance solution.

The positively chargeable substance is selected from the group consisting of chitosan or quaternary ammonium group and is dissolved in a solvent to prepare a positive charge substance dissolution liquid. The positive liquid material dissolving solution may be coated with 0.01 to 5 parts by weight based on 100 parts by weight of the carbonized sludge, and water or acid may be used as the solvent.

The chitosan can be obtained by deacetylating chitin contained in the shrimp shell and shrimp shell in an amount of 60% or more, preferably 65 to 98%. The molecular weight of the chitosan is preferably in the range of 10,000 to 100,000. If the molecular weight is less than 10,000, adhesion to the carbonized sludge is insufficient, and since the potential of the positive charge is lowered, the adhered filtration rate of the fine dust or dust having a negative charge may be lowered. When the molecular weight exceeds 100,000, It is preferable to use the mixture in the above-mentioned range because the viscosity increases and the efficiency of the workability deteriorates.

As the solvent for dissolving the chitosan, citric acid, acetic acid which is an acid solution. Sulfuric acid, hydrochloric acid, and nitric acid. The acid solution may be diluted with water, and acetic acid is preferably used to prevent odor and environmental pollution.

In addition, the quaternary ammonium system may be selected from the group consisting of choline, carnitine, benzalkonium chloride; Denatonium; Cetrimonium bromide; Diallyldimethyl ammonium chloride; 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC); 3-chloro-2-hydroxypropyltrimethylammonium chloride; Copolymers of acrylamide and quaternized dimethylammonium ethyl methacrylate (Copolymer of acrylamide and quaternized dimethylammonium methyl methacrylate); Poly (diallyldimethylammonium chloride); a diallyldimethylammonium chloride polymer; Copolymers of acrylamide and diallyldimethylammonium chloride (Copolymer of acrylamide and diallyldimethylammonium chloride); Quaternized hydroxyethylcellulose; Copolymers of vinylpyrrolidone and quaternized dimethylaminoethyl methacrylate (Copolymer of vinylpyrrolidone and quaternized dimethylaminoethyl methacrylate); Copolymers of vinylpyrrolidone and quaternized vinylimidazole (Copolymer of vinylpyrrolidone and quaternized vinylimidazole); Copolymers of acrylic acid and diallyldimethylammonium chloride (Copolymer of Acrylic Acid and Diallyldimethylammonium Chloride); Copolymers of vinylpyrrolidone and methacrylamidopropyltrimethylammonium (Copolymer of vinylpyrrolidone and methacrylamidopropyl trimethylammonium); Poly (acrylamide 2-methacryloxyethyltrimethyl ammonium chloride) (Poly (acrylamide 2-methacryloxyethylammonium chloride)); Acrylic acid, acrylamide and diallyldimethylammonium chloride (Terpolymer of Acrylic Acid, Acrylamide and Diallyldimethylammonium Chloride); Terpolymers of vinylcaprolactam, vinylpyrrolidone, and quaternized vinylimidazole; vinyl caprolactam, vinylpyrrolidone and quaternized vinylimidazole; And trimers of acrylic acid, methacrylamidopropyltrimethylammonium and methyl acrylate (terpolymer of acrylic acid, methacrylamidopropyl trimethylammonium chloride, and methyl acrylate). Water (distilled water) may be used as a solvent for dissolving the quaternary ammonium system.

In the fourth step, the carbonized sludge in the second step is mixed with the positive charge material solution in the third step and then stirred.

The agitation is to uniformly mix the carbonized sludge and the positive charge material solution so that the surface of the carbonized sludge is uniformly coated with the positive charge material solution.

The stirring is preferably carried out at a speed of 1000 to 3000 rpm for 30 minutes to 2 hours to uniformly mix. When the stirring is performed for less than 30 minutes, the mixing ratio of the carbonized sludge and the positive charge material solution is not uniform, so that the coating rate of the carbonized sludge is lowered. If the stirring is performed for more than 2 hours, the uniform coating is insufficient, .

In the fifth step, the agitated product of the carbonized sludge and the positive charge material solution in the fourth step is put into an oven and dried to prepare an adsorbent coated with the positive charge material on the carbonated sludge.

The drying is carried out in a drying oven (dry oven). The drying oven is heated to a temperature in the range of 80 to 180 ° C and dried for 1 to 4 hours. Preferably, the drying time is shortened It is dried within a heating range of 100 to 180 ° C within 1 to 2 hours.

In addition, the dried adsorbent may be further subjected to a molding step (step 6) of further mixing the water-soluble binder and molding the water-soluble binder into a predetermined size.

In the forming step, the water-soluble binder is stirred with a certain amount of the adsorbent, and then the resultant is pressed or extruded into a predetermined size by molding with a mold, or an adsorbent coated with a positive charge material is sprayed by spraying a water- A process of forming water into an adsorbed ball by combining with a water-soluble binder, and then drying the water. The adsorption balls can be formed in a range of 0.1 to 10 mm in particle diameter. The limestone is solidified by contact with water after sintering together with purified water sludge, and the water soluble binder is mixed, Can be provided.

Examples of the water-soluble binder include starch, cellulose or a derivative thereof, alginic acid, gelatin, polyvinyl alcohol (PVA), a water-dispersible acrylic resin or a derivative thereof and a water-dispersible vinyl acetate resin as water- A hydrogenated rosin ester resin, a rosin-modified phenol resin, a terpene-based hydrogenated resin, a terpene-based hydrogenated resin, a rosin-based resin, a hydrogenated rosin ester resin, a rosin- Based resin, an alkylphenol-formaldehyde-based resin, a styrene-based resin, an aliphatic petroleum resin, an alicyclic petroleum resin, a copolymer petroleum resin , An aromatic petroleum resin, a xylene-based resin, a xylene formaldehyde-based resin, and the like, An oligomer-based tackifier such as polybutene or liquid-based rubber may be used.

The adsorbent of the present invention produced by the above method is carbonized by mixing 5 to 20 parts by weight of limestone with respect to 100 parts by weight of purified water sludge and is coated with 0.01 to 5 parts by weight of positively charged substance with respect to 100 parts by weight of carbonized sludge, .

The adsorbent of the present invention may be produced by carbonizing 5 to 20 parts by weight of limestone and 0.001 to 0.2 part by weight of metal or metal oxide with respect to 100 parts by weight of purified water sludge and adding 0.01 to 5 parts by weight of positively charged substance to 100 parts by weight of carbonized sludge Coated to a size of 0.01 to 3 mm.

The adsorbent thus prepared can adsorb and remove foreign matter or noxious gas by pores and adsorb and separate fine dust or dust that is not filtered by pores by a potential difference due to positively charged substances coated on the adsorbent to improve filtration performance.

≪ Example 1 - Production of adsorbent having controlled limestone mixing amount >

The mixture of limestone was mixed with 100 g of purified water sludge which was supplied and dried at the water treatment plant nearby Daejeon, and the mixture was stirred at 1500 rpm for 1 hour to produce activated sludge.

The activated sludge thus prepared was put into a sintering furnace and fired at a temperature of 500 ° C for 1 hour to carbonize the organic material to produce carbonized sludge

10 g of deacetylated chitosan (molecular weight: 50,000) was mixed and stirred into a mixed solvent of 10 ml of acetic acid and 90 ml of distilled water to prepare a positively charged substance solution.

100 parts by weight of the produced carbonized sludge was weighed, and 20 ml of the positive charge substance solution dissolved with 10 g of the positive charge substance was added thereto. Finally, 2 g of the positive charge substance was mixed with 100 parts by weight of the carbonized sludge and stirred at 1500 rpm for 1 hour Respectively.

The agitated material was added to the drying furnace and dried at 120 DEG C for 1 hour to obtain an adsorbent. The adsorbent was prepared as shown in Table 1 below.

The AS-11 to AS-19 are adsorbents produced by the production method of the present invention using purified water sludge, and SS-1 represents pure activated carbon to be compared.

Experimental Example 1 - Deodorization Experiment [

The sample of Table 1 was deodorized for ammonia.

1) 10 g of the sample shown in Table 1 was placed in a 5 L Tedlar bag, and 90 ppm ammonia was injected as a test gas. After injection, the sample was sealed.

The test gas was measured by the provisions of KS I 2218 and the temperature was maintained at 23 ± 4 ° C during the test and the humidity was maintained at 50 ± 10%.

Deodorization rate (%) = [(blank concentration - measured gas concentration) / blank concentration] × 100

The concentration of the test gas was measured at the initial (0 minute), 30, 60, 90 and 120 minutes, and is shown in Table 2 below

As shown in Table 2, in the case of AS-16 to AS-18 adsorbent samples in which limestone was mixed with purified water sludge and positively charged substances were coated, a high deodorization rate of 84.3% to 86.7% with respect to ammonia was observed similarly to pure activated carbon Able to know. However, when the mixing ratio of limestone is less than 5 parts by weight based on 100 parts by weight of purified water sludge, the degree of activation is lowered and the deodorization ratio is somewhat lowered. When the mixing ratio is 10 parts by weight or more, The result was lower.

≪ Example 2 - Production of adsorbent with controlled amount of positive charge material >

An adsorbent was prepared under the same experimental conditions as in Example 1,

The mixture ratio of water sludge and limestone was fixed and the amount of positive charge substance was controlled. That is, a mixture of 10 ml of acetic acid and 90 ml of distilled water was mixed with a mixed amount of chitosan as a positively charged substance.

20 ml of the finally prepared positive charge substance solution was taken and mixed, and the content of the positive charge substance contained in 20 ml is shown in Table 3 below.

Experimental Example 2 - Measurement of Filtration Rate [

10 g of the sample of Table 3 was placed between the nonwoven fabric layers to prepare a 10-cm diameter filtration filter.

4 g of carbon black (trade name: Printex V-2) is precisely weighed and placed in a 1 × 1 × 1 m acrylic chamber, blowing a small electric fan so that carbon black powder is scattered, And the residual amount of carbon black powder remaining in the filter was measured. The results are shown in Table 4 below. ≪ tb > < TABLE >

As shown in Table 4, when the positive charge material is coated in a small amount, the filtration rate of fine carbon black is high, and when the positively charged substance is coated over the adsorbent of AS-26, the degree of increase of the filtration rate is insufficient .

Therefore, it is preferable to mix the positive charge materials in the range of 0.5 to 3 parts by weight with respect to 100 parts by weight of purified water sludge or carbonized sludge to provide a filtration ratio.

≪ Example 3 - Production of adsorbent modified with positive charge substance type >

An adsorbent was prepared under the same experimental conditions as in Example 1.

However, the mixing ratios of water sludge, limestone and positively charged substances were fixed to the mixing ratio of AS-26, which was excellent in Example 2, and the adsorbent was prepared by changing to a positively charged substance in the quaternary ammonium system as shown in Table 5 below. In this case, the positive charge material of Table 5 was dissolved in water without dissolving in the acid material solvent of Example 2 and used.

<Experimental Example 3 - Measurement of Filtration Rate>

The filtration rate was measured in the same manner as in Experimental Example 2.

In the samples, the residual amount of carbon black is 3.70 ~ 3.73 (g), and the filtration rate is 92.5 ~ 93.3%, which is similar to that of chitosan. Therefore, the adsorbent can be manufactured by the production process of the present invention using quaternary ammonium series.

&Lt; Example 4 - Production of adsorbent mixed with metal or metal oxide >

An adsorbent was prepared under the same experimental conditions as in Example 1.

However, the mixture ratio of water sludge, limestone, and positively charged substance was fixed to the mixing ratio of AS-26, which was excellent in Example 2.

Chitosan was used as a positively charged substance, and silver (Ag) was used as a metal or metal oxide, and they were mixed as shown in Table 6 below.

<Experimental Example 4-Antimicrobial Test>

1 g each of the samples of Table 6 were taken in a flask and cultured for 24 hours for antibacterial evaluation test.

The strains of the antimicrobial activity test were carried out according to the method of bacterial count (KS K 0693) using E. coli ATCC 25922 and Staphylococcus aureus ATCC 6538, and the results are shown in Table 7 below.

As shown in Table 7, it can be seen that the basic antibacterial property is provided by the property of the adsorbent even when the metal component is not added.

- repeated execution of antibacterial test

The antimicrobial activity test was repeated ten times using the sample once subjected to the antimicrobial activity test without changing the sample, and it was confirmed whether or not the number of bacteria was measured according to the number of experiments.

In the AS-41 sample containing no metal components, bacterial counts began to be measured 3 times. In the AS-41 samples containing a small amount of metal components, bacterial counts were also measured 6 times. 43 to AS-49, the number of bacteria was not measured up to 10 times, and continuous antibacterial performance was provided.

Claims (8)

Based on 100 parts by weight of purified water sludge, 5 to 20 parts by weight of limestone; The activated sludge mixed with 0.001 to 0.2 parts by weight of a metal component is carbonized,
Wherein the carbonized sludge is coated with 0.01 to 5 parts by weight of a quaternary ammonium-based positive charge-based material on the basis of 100 parts by weight of the carbonized sludge,
The metal component may be,
(Y), molybdenum (Mo), Bi, Tele, Te, Mn, Cb, Rh, Ir, Ni, Pd ), Platinum (Pt), copper (Cu), silver (Ag), gold (Au) and aluminum (Al)
The quaternary ammonium-based positively charged substance is a quaternary ammonium-
Choline, Carnitine, Benzalkonium chloride; Denatonium; Cetrimonium bromide; Diallyldimethyl ammonium chloride; 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC); 3-chloro-2-hydroxypropyltrimethylammonium chloride; Copolymers of acrylamide and quaternized dimethylammonium ethyl methacrylate (Copolymer of acrylamide and quaternized dimethylammonium methyl methacrylate); Poly (diallyldimethylammonium chloride); a diallyldimethylammonium chloride polymer; Copolymers of acrylamide and diallyldimethylammonium chloride (Copolymer of acrylamide and diallyldimethylammonium chloride); Quaternized hydroxyethylcellulose; Copolymers of vinylpyrrolidone and quaternized dimethylaminoethyl methacrylate (Copolymer of vinylpyrrolidone and quaternized dimethylaminoethyl methacrylate); Copolymers of vinylpyrrolidone and quaternized vinylimidazole (Copolymer of vinylpyrrolidone and quaternized vinylimidazole); Copolymers of acrylic acid and diallyldimethylammonium chloride (Copolymer of Acrylic Acid and Diallyldimethylammonium Chloride); Copolymers of vinylpyrrolidone and methacrylamidopropyltrimethylammonium (Copolymer of vinylpyrrolidone and methacrylamidopropyl trimethylammonium); Poly (acrylamide 2-methacryloxyethyltrimethyl ammonium chloride) (Poly (acrylamide 2-methacryloxyethylammonium chloride)); Acrylic acid, acrylamide and diallyldimethylammonium chloride (Terpolymer of Acrylic Acid, Acrylamide and Diallyldimethylammonium Chloride); Terpolymers of vinylcaprolactam, vinylpyrrolidone, and quaternized vinylimidazole; vinyl caprolactam, vinylpyrrolidone and quaternized vinylimidazole; And at least one selected from the group consisting of acrylic acid, methacrylamidopropyltrimethylammonium and methyl acrylate (Terpolymer of Acrylic Acid, Methacrylamidopropyl Trimethyl Ammonium Chloride, and Methyl Acrylate). delete delete delete A first step of mixing and stirring activated sludge with 5 to 20 parts by weight of limestone and 0.001 to 0.2 part by weight of metal components per 100 parts by weight of purified water sludge;
A second step of carbonizing the organic material by heating the activated sludge at a temperature of 400 to 600 ° C for 1 to 3 hours to produce carbonized sludge;
A third step of dissolving a positive charge material selected from quaternary ammonium type positive charge materials in water as a solvent to prepare a positive charge material solution;
A fourth step of mixing the carbonized sludge of the second step with the positive charge material dissolution solution of the third step and stirring the mixture for 30 minutes to 2 hours;
And a fifth step of putting the agitated product of the fourth step in an oven at 100 to 180 ° C. for 1 to 2 hours to prepare an adsorbent coated with 0.01 to 5 parts by weight of positively charged substance per 100 parts by weight of carbonated sludge But,
The metal material may be,
(Y), molybdenum (Mo), Bi, Tele, Te, Mn, Cb, Rh, Ir, Ni, Pd ), Platinum (Pt), copper (Cu), silver (Ag), gold (Au) and aluminum (Al)
The quaternary ammonium-based positively charged substance is a quaternary ammonium-
Choline, Carnitine, Benzalkonium chloride; Denatonium; Cetrimonium bromide; Diallyldimethyl ammonium chloride; 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC); 3-chloro-2-hydroxypropyltrimethylammonium chloride; Copolymers of acrylamide and quaternized dimethylammonium ethyl methacrylate (Copolymer of acrylamide and quaternized dimethylammonium methyl methacrylate); Poly (diallyldimethylammonium chloride); a diallyldimethylammonium chloride polymer; Copolymers of acrylamide and diallyldimethylammonium chloride (Copolymer of acrylamide and diallyldimethylammonium chloride); Quaternized hydroxyethylcellulose; Copolymers of vinylpyrrolidone and quaternized dimethylaminoethyl methacrylate (Copolymer of vinylpyrrolidone and quaternized dimethylaminoethyl methacrylate); Copolymers of vinylpyrrolidone and quaternized vinylimidazole (Copolymer of vinylpyrrolidone and quaternized vinylimidazole); Copolymers of acrylic acid and diallyldimethylammonium chloride (Copolymer of Acrylic Acid and Diallyldimethylammonium Chloride); Copolymers of vinylpyrrolidone and methacrylamidopropyltrimethylammonium (Copolymer of vinylpyrrolidone and methacrylamidopropyl trimethylammonium); Poly (acrylamide 2-methacryloxyethyltrimethyl ammonium chloride) (Poly (acrylamide 2-methacryloxyethylammonium chloride)); Acrylic acid, acrylamide and diallyldimethylammonium chloride (Terpolymer of Acrylic Acid, Acrylamide and Diallyldimethylammonium Chloride); Terpolymers of vinylcaprolactam, vinylpyrrolidone, and quaternized vinylimidazole; vinyl caprolactam, vinylpyrrolidone and quaternized vinylimidazole; And one or more selected from the group consisting of acrylic acid, methacrylamidopropyltrimethylammonium, and methyl acrylate (Terpolymer of Acrylic Acid, Methacrylamidopropyl Trimethyl Ammonium Chloride, and Methyl Acrylate). delete delete delete

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