A polyferric chloride high-efficiency water purifier and its production process and application

Abstract

The invention discloses a kind of polyferric chloride efficient water purifier and its production process and application, belong to the field of water purifier technology, the polyferric chloride efficient water purifier is a polymer inclusion structure;Polyferric chloride efficient water purifier includes polyferric chloride and the β-cyclodextrin polymer matrix of load polyferric chloride.By β-cyclodextrin polymer matrix carrier loading, the stability of polyferric chloride can be effectively improved, polymer inclusion structure can integrate the advantages of polymer matrix and polyferric chloride, not only with good stability and structural adjustability, but also can integrate the advantages of both, improve the treatment capacity to sewage, effectively improve the utilization rate of polyferric chloride.And polypropylene glycol block copolymerization polyethyleneimine can also be compounded in β-cyclodextrin polymer matrix, it is possible to enhance the charge neutralization and adsorption bridging effect of polyferric chloride, chelate the heavy metal ions in sewage, so as to improve water purification effect and water purification efficiency, obtain efficient water purifier.

Description

Technical Field

[0001] The present invention belongs to the technical field of water purifiers, and in particular relates to a polyferric chloride high-efficiency water purifier and a production process and application thereof. Background Art

[0002] Water is a basic natural resource necessary for human life. Human reproduction and survival are inseparable from water. However, with the continuous development of industry, especially the rapid development of heavily polluting enterprises such as the chemical industry, papermaking industry, and printing and dyeing industry, water pollution problems have become increasingly prominent. How to deal with water environment problems has become one of the important issues facing and urgently need to be solved in current social development.

[0003] Traditional water treatment technologies can generally be divided into physical, chemical and biochemical methods. The principle of the chemical method is to use chemical reactions to separate and remove soluble or colloidal pollutants in water, or convert them into non-toxic and stable substances. This process is usually achieved by adding various reagents to the water to produce chemical reactions. Among them, coagulation is a physical and chemical process that destroys the stability of colloidal particles. It is also a very important traditional water treatment process. Coagulants are also widely used to remove suspended pollutants and some soluble pollutants in water.

[0004] Inorganic coagulants are one of the most widely used coagulants. Although aluminum salt coagulants have excellent and efficient flocculation capabilities, the accumulation of aluminum salts can affect human health and is not conducive to water purification. Compared with aluminum salt coagulants, iron salt coagulants have the advantages of being safe, non-toxic, and having a wide range of applications. However, iron salt coagulants also have problems such as strong acidity, strong corrosiveness, and high equipment requirements.

[0005] As an important type of iron salt coagulant, polyferric chloride has good coagulation treatment effect, and the effect is more obvious for low-temperature and low-turbidity treatment. However, polyferric chloride has poor stability, fast hydrolysis-precipitation reaction, and is easily destabilized and ineffective, making it difficult to apply on a large scale. Summary of the Invention

[0006] The present invention aims to provide a polyferric chloride high-efficiency water purifier and its production process and application, so as to solve the problems of poor stability of polyferric chloride and limited water purification effect.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] In a first aspect, the present invention provides a polyferric chloride high-efficiency water purifier, which has a polymer inclusion structure; the polyferric chloride high-efficiency water purifier includes polyferric chloride and a β-cyclodextrin polymer matrix loaded with polyferric chloride.

[0009] Preferably, the mass ratio of polyferric chloride to β-cyclodextrin polymer matrix is ​​(0.4-0.5):1.

[0010] By adopting the above technical solution, the polyferric chloride high-efficiency water purifier of the present invention uses a β-cyclodextrin polymer matrix as a carrier. The β-cyclodextrin as a matrix can ensure that the obtained water purifier is environmentally friendly and can be degraded afterwards. No environmentally harmful substances will enter the water source during the water treatment process. Then, the polyferric chloride is loaded, and finally a high-efficiency water purifier with a polymer inclusion structure is obtained. The carrier loading can effectively improve the stability of the polyferric chloride, especially for some occasions requiring high-concentration polyferric chloride. Under high concentration conditions, the hydrolysis-precipitation reaction of the polyferric chloride is accelerated, making it difficult to maintain stability during long-term storage. The β-cyclodextrin polymer matrix can provide adsorption sites and storage space for the polyferric chloride. By constructing a relatively closed space, the influence of adverse external factors on the polyferric chloride flocculant is reduced, thereby improving the stability of the obtained water purifier.

[0011] Moreover, compared with other organic or inorganic carriers, such as diatomaceous earth and polyacrylamide, although they can improve the stability of polyferric chloride to a certain extent, they will affect the flocculation ability of polyferric chloride. The polymer inclusion structure loaded polyferric chloride of the present invention fixes the polyferric chloride on the carrier by physical adsorption. The interconnected pore structure of the beta-cyclodextrin polymer matrix is ​​conducive to mass transfer. The large specific surface area and porosity provide sufficient loading amount and mass transfer area. The advantages of the carrier and polyferric chloride are combined, and the invention not only has good stability and structural adjustability, but also can combine the advantages of both to improve the sewage treatment capacity and effectively improve the utilization rate of polyferric chloride.

[0012] Specifically, the polymer inclusion structure carrier can also provide additional adsorption sites and active centers. The carrier itself can capture pollutants in the water and can effectively adjust the rate and method of releasing polyferric chloride into the water to ensure the best effect at the most appropriate time and place. It helps to form compact and faster-settling flocs, thereby improving the flocculation effect. Moreover, the water purifier obtained by loading the β-cyclodextrin polymer matrix can help optimize the effective use conditions of polyferric chloride, making it easier for pollutants to undergo complexation reactions with polyferric chloride, thereby achieving better turbidity removal and decolorization effects, thereby improving the water purification efficiency of the water purifier.

[0013] Preferably, the raw materials of the β-cyclodextrin polymer matrix include β-cyclodextrin and polypropylene glycol in a mass ratio of 100:(3-6).

[0014] Preferably, the β-cyclodextrin polymer matrix is ​​prepared according to the following method:

[0015] Add β-cyclodextrin to water, increase the temperature to 50-60° C., stir and dissolve, then add polypropylene glycol, ultrasonically disperse for 10-20 minutes, let stand for 10-15 hours, and then filter, wash and dry to obtain a β-cyclodextrin polymer matrix.

[0016] By adopting the above technical solution, the present invention selects β-cyclodextrin as the main carrier matrix of polyferric chloride, mainly because β-cyclodextrin has a unique cavity structure, polyferric chloride can form an inclusion structure with it, and after the water molecules in the cavity inside the β-cyclodextrin are replaced by polyferric chloride, the original system energy can be reduced, which is conducive to the formation of the inclusion complex, and in order to further improve the stability of the water purifier and stabilize the carrier structure, polypropylene glycol is added to pre-treat the β-cyclodextrin, and the obtained β-cyclodextrin polymer matrix is ​​not easily affected by the outside world, and the low molecular weight polyferric chloride enters the interior of the β-cyclodextrin polymer matrix and is completely covered by the carrier, but does not form a tight chemical bond to affect the structure of the polyferric chloride itself, which can greatly reduce the direct contact between the polyferric chlorides, and at the same time, the carrier has a sustained-release effect, the stability of the polyferric chloride is improved, and the efficiency and water purification effect of the water purifier are improved.

[0017] Preferably, polypropylene glycol is block copolymerized with polyethylene imine; the raw materials of the polypropylene glycol block copolymerized with polyethylene imine include carboxyl-terminated polypropylene glycol monomethyl ether and polyethylene imine in a molar ratio of 1: (0.1-0.15).

[0018] Preferably, the carboxyl-terminated polypropylene glycol monomethyl ether is prepared according to the following method:

[0019] In a nitrogen atmosphere, polypropylene glycol monomethyl ether is added to water, the solution temperature is adjusted to 0-5°C, a brominating agent and an oxidizing agent are added, and the mixture is stirred for 10-20 minutes. The pH value is adjusted to 5-5.5, free radicals are added, and the pH value is further adjusted to 3-3.5. The mixture is stirred for 3-4 hours, and finally, carboxyl-terminated polypropylene glycol monomethyl ether is obtained through extraction, filtration, reduced pressure distillation, and drying.

[0020] More preferably, the brominating agent includes any one of sodium bromide and potassium bromide; the added amount of the brominating agent is 1 to 3% of the mass of the polypropylene glycol monomethyl ether.

[0021] More preferably, the oxidant includes any one of sodium hypochlorite, hydrogen peroxide and potassium permanganate; and the added amount of the oxidant is 4 to 6% of the mass of the polypropylene glycol monomethyl ether.

[0022] More preferably, the free radical is 2,2,6,6-tetramethylpiperidin-1-oxyl free radical; and the added amount of the free radical is 0.5 to 1%.

[0023] Preferably, the polypropylene glycol block copolymerized polyethyleneimine is prepared according to the following method:

[0024] Add carboxyl-terminated polypropylene glycol monomethyl ether to a buffer solution, adjust the solution pH to 6-6.5, add a carboxyl activator and stir for 20-30 minutes, add polyethyleneimine, stir and react at room temperature for 10-15 hours, and finally dialyze, distill under reduced pressure and dry to obtain the product.

[0025] Preferably, the buffer is MES buffer.

[0026] Preferably, the carboxyl activator is a combination of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide; the molar ratio of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride to N-hydroxysuccinimide is 1:0.5.

[0027] By adopting the above technical solution, carboxylated polypropylene glycol monomethyl ether reacts with the amino groups in polyethyleneimine to obtain a block copolymer of polypropylene glycol and polyethyleneimine. The resulting block copolymer is then compounded with β-cyclodextrin to obtain a β-cyclodextrin polymer matrix.

[0028] The addition of polyethyleneimine can, on the one hand, enhance the grafting complex between polypropylene glycol and β-cyclodextrin, forming a more stable polymer network and increasing the adsorption sites for polyferric chloride. Furthermore, the large amount of cationic positive charges in polyethyleneimine can enhance the charge neutralization effect of polyferric chloride. Furthermore, the positive charges can help compress the double layer of negatively charged colloidal particles in water, reducing the electrostatic repulsion between particles and promoting their coagulation, thereby forming larger flocculated sediments. Furthermore, the long-chain structures of polyethyleneimine and polypropylene glycol can form bridges between sewage particles, thereby enhancing the adsorption and bridging effect of polyferric chloride and forming larger flocs. The flocculation effect of the water purifier obtained by combining polyethyleneimine with polyferric chloride is significantly enhanced.

[0029] In addition, the amino group in polyethyleneimine has a strong coordination ability and can chelate heavy metal ions in water, such as copper ions, to form a stable complex, thereby achieving effective removal of heavy metal ions. It can not only cooperate with polyferric chloride to improve the flocculation effect of the water purifier, but also neutralize and adsorb all anionic substances, including organic pollutants, through high cationic properties, thereby improving the water purification effect and efficiency, and obtaining a highly efficient water purifier.

[0030] Preferably, the raw materials of the polyferric chloride high-efficiency water purifier further include a plasticizer; the plasticizer includes a combination of one or more of 2-nitrophenyl octyl ether, triacetyl citrate and butyl stearate.

[0031] Preferably, the added amount of the plasticizer is 6-8% of the mass of the β-cyclodextrin polymer matrix.

[0032] By adopting the above technical solution, the physical properties of the formed polymer inclusion structure compound can be improved by adding a plasticizer, and the compound can be inserted between the molecular chains of the polymer matrix, reducing the interaction force between molecules, thereby increasing the mobility of the chain segments, making the β-cyclodextrin polymer matrix softer and more ductile, and ensuring the uniform distribution of polyferric chloride in the carrier structure.

[0033] At the same time, the addition of the plasticizer in the present invention can also increase and strengthen the adsorption bridging effect, ensuring that the water purifier can perform its water purification function stably and efficiently for a long time, so that the finally obtained carrier has a positive impact on the flocculation effect and water purification efficiency of polyferric chloride.

[0034] In a second aspect, the present invention provides a production process for a polyferric chloride high-efficiency water purifier, comprising the following process steps:

[0035] The beta-cyclodextrin polymer matrix is ​​added to a solvent, and polyferric chloride and a plasticizer are added, and the mixture is stirred for 2 to 3 hours. The solvent is slowly evaporated at room temperature, and finally the polyferric chloride high-efficiency water purifier is separated in an ice-water mixture.

[0036] Preferably, the solvent includes one of N,N-dimethylformamide, N-methylpyrrolidone, N,N-dimethylacetamide and triethyl phosphate.

[0037] In a third aspect, the present invention provides an application of a polyferric chloride high-efficiency water purifier, which can be applied to any of tap water purification, industrial sewage treatment, domestic sewage treatment, wastewater decolorization and sludge treatment.

[0038] Beneficial effects of the present invention:

[0039] 1. The polyferric chloride efficient water purifier of the present invention uses a β-cyclodextrin polymer matrix as a carrier, is loaded with polyferric chloride, and finally obtains an efficient water purifier with a polymer inclusion structure. By carrier loading, the stability of polyferric chloride can be effectively improved. The polymer inclusion structure can combine the advantages of the polymer matrix and polyferric chloride, not only having good stability and structural adjustability, but also being able to combine the advantages of the two, improving the sewage treatment capacity, and effectively improving the utilization rate of polyferric chloride. In addition, polypropylene glycol is added to pre-treat the β-cyclodextrin, and the obtained β-cyclodextrin polymer matrix structure is more stable.

[0040] 2. The polypropylene glycol block copolymer added to the β-cyclodextrin polymer matrix of the present invention is copolymerized with polyethyleneimine. Polyethyleneimine can not only form a more stable polymer network, but also enhance the charge neutralization and adsorption bridging effects of polyferric chloride, promote coagulation between particles, and thus form larger flocculated precipitates; and can chelate heavy metal ions in sewage to form stable complexes, thereby improving the water purification effect and efficiency and obtaining a highly efficient water purifier. DETAILED DESCRIPTION

[0041] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] Preparation Example 1

[0043] Preparation Example 1-1, a polypropylene glycol block copolymerized polyethyleneimine was prepared by the following method:

[0044] In a nitrogen atmosphere, 200 g of polypropylene glycol monomethyl ether (average molecular weight 2 × 10 5 ) was added to water, the solution temperature was adjusted to 0°C, 3 g of sodium bromide and 10 g of sodium hypochlorite were added, and the mixture was stirred for 20 min. The pH value was adjusted to 5, 1 g of 2,2,6,6-tetramethylpiperidin-1-oxyl free radical was added, and the pH value was further adjusted to 3.5. The mixture was stirred for 3 h, and finally, carboxyl-terminated polypropylene glycol monomethyl ether was obtained through extraction, filtration, reduced pressure distillation, and drying.

[0045] 0.1 mol of the above-obtained carboxyl-terminated polypropylene glycol monomethyl ether was added to 250 mL of MES buffer, the pH value of the solution was adjusted to 6, 0.1 mol of a carboxyl activator was added, wherein the carboxyl activator was a mixture of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide in a molar ratio of 1:0.5, and the mixture was stirred for 30 minutes. 0.01 mol of polyethyleneimine (average molecular weight of 5000) was added, and the mixture was stirred at room temperature for 15 hours. Finally, the mixture was dialyzed, distilled under reduced pressure, and dried.

[0046] Preparation Example 1-2, a polypropylene glycol block copolymerized polyethyleneimine, is different from Preparation Example 1-1 only in that the amount of polyethyleneimine added is 0.015 mol.

[0047] Preparation Example 2

[0048] Preparation Example 2-1: A β-cyclodextrin polymer matrix was prepared according to the following method:

[0049] Take 100g of β-cyclodextrin and add it to 500mL of water, raise the temperature to 60℃, stir and dissolve it, then add 5g of polypropylene glycol (average molecular weight 2×10 5 ), ultrasonically dispersed for 15 minutes, allowed to stand for 12 hours, and then filtered, washed and dried to obtain a β-cyclodextrin polymer matrix.

[0050] Preparation Example 2-2, a β-cyclodextrin polymer matrix, differs from Preparation Example 2-1 only in that the amount of polypropylene glycol added is 3 g.

[0051] Preparation Example 2-3, a β-cyclodextrin polymer matrix, differs from Preparation Example 2-1 only in that the amount of polypropylene glycol added is 6 g.

[0052] Preparation Example 2-4, a β-cyclodextrin polymer matrix, differs from Preparation Example 2-1 only in that the amount of polypropylene glycol added is 1 g.

[0053] Preparation Example 2-5, a β-cyclodextrin polymer matrix, differs from Preparation Example 2-1 only in that the amount of polypropylene glycol added is 8 g.

[0054] Preparation Example 2-6, a β-cyclodextrin polymer matrix, differs from Preparation Example 2-1 only in that an equal amount of polypropylene glycol block copolymerized polyethyleneimine prepared in Preparation Example 1-1 is used to replace polypropylene glycol.

[0055] Preparation Example 2-7, a β-cyclodextrin polymer matrix, differs from Preparation Example 2-1 only in that an equal amount of polypropylene glycol block copolymerized polyethyleneimine prepared in Preparation Example 1-2 is used to replace polypropylene glycol.

[0056] Example

[0057] Example 1, a polyferric chloride high-efficiency water purifier, is prepared according to the following process steps:

[0058] 100 g of the β-cyclodextrin polymer matrix prepared in Preparation Example 2-1 was added to 250 mL of N,N-dimethylformamide, 45 g of polyferric chloride and 7 g of 2-nitrophenyl octyl ether were added, and the mixture was stirred for 3 h. The solvent was slowly evaporated at room temperature, and finally the polyferric chloride high-efficiency water purifier was separated in an ice-water mixture.

[0059] Example 2, a polyferric chloride high-efficiency water purifier, differs from Example 1 only in that the amount of polyferric chloride added is 40 g; the amount of 2-nitrophenyl octyl ether added is 6 g.

[0060] Example 3, a polyferric chloride high-efficiency water purifier, differs from Example 1 only in that the amount of polyferric chloride added is 50 g; the amount of 2-nitrophenyl octyl ether added is 8 g.

[0061] Example 4, a polyferric chloride high-efficiency water purifier, differs from Example 1 only in that the β-cyclodextrin polymer matrix prepared in Preparation Example 2-1 is replaced by an equal amount of the β-cyclodextrin polymer matrix prepared in Preparation Example 2-2.

[0062] Example 5, a polyferric chloride high-efficiency water purifier, differs from Example 1 only in that the β-cyclodextrin polymer matrix prepared in Preparation Example 2-1 is replaced by an equal amount of the β-cyclodextrin polymer matrix prepared in Preparation Example 2-3.

[0063] Example 6, a polyferric chloride high-efficiency water purifier, differs from Example 1 only in that the β-cyclodextrin polymer matrix prepared in Preparation Example 2-1 is replaced by an equal amount of the β-cyclodextrin polymer matrix prepared in Preparation Example 2-4.

[0064] Example 7, a polyferric chloride high-efficiency water purifier, differs from Example 1 only in that the β-cyclodextrin polymer matrix prepared in Preparation Example 2-1 is replaced by an equal amount of the β-cyclodextrin polymer matrix prepared in Preparation Example 2-5.

[0065] Example 8, a polyferric chloride high-efficiency water purifier, differs from Example 1 only in that the β-cyclodextrin polymer matrix prepared in Preparation Example 2-1 is replaced by an equal amount of the β-cyclodextrin polymer matrix prepared in Preparation Example 2-6.

[0066] Example 9, a polyferric chloride high-efficiency water purifier, differs from Example 1 only in that the β-cyclodextrin polymer matrix prepared in Preparation Example 2-1 is replaced by an equal amount of the β-cyclodextrin polymer matrix prepared in Preparation Example 2-7.

[0067] Example 10 is a polyferric chloride high-efficiency water purifier, which differs from Example 1 only in that 2-nitrophenyl octyl ether is not added.

[0068] Example 11, a polyferric chloride high-efficiency water purifier, is different from Example 1 only in that the amount of polyferric chloride added is 30g.

[0069] Example 12, a polyferric chloride high-efficiency water purifier, is different from Example 1 only in that the amount of polyferric chloride added is 70g.

[0070] Comparative Example

[0071] Comparative Example 1, a polyferric chloride high-efficiency water purifier, was prepared according to the following process steps:

[0072] 100 g of β-cyclodextrin was added to 250 mL of N,N-dimethylformamide, 45 g of polyferric chloride and 7 g of 2-nitrophenyl octyl ether were added, and the mixture was stirred for 3 h. The solvent was slowly evaporated at room temperature, and finally the polyferric chloride high-efficiency water purifier was separated in an ice-water mixture.

[0073] Comparative Example 2, a polyferric chloride high-efficiency water purifier, was prepared according to the following process steps:

[0074] 100 g of the β-cyclodextrin polymer matrix prepared in Preparation Example 2-1, 45 g of polyferric chloride and 7 g of 2-nitrophenyl octyl ether were stirred and mixed for 3 h to prepare a polyferric chloride high-efficiency water purifier.

[0075] Comparative Example 3, a polyferric chloride high-efficiency water purifier, was prepared according to the following process steps:

[0076] 100 g of diatomaceous earth was added to 250 mL of N,N-dimethylformamide, 45 g of polyferric chloride and 7 g of 2-nitrophenyl octyl ether were added, and the mixture was stirred for 3 h. The solvent was slowly evaporated at room temperature, and finally the polyferric chloride high-efficiency water purifier was separated in an ice-water mixture.

[0077] Performance testing

[0078] Sample preparation: Collect organic sewage from urban rivers, where the influent COD content is 350 mg / L and contains Cu 2+ 42.8 mg / L, take 500 mL of the above sewage, add the composite polyaluminum chloride water treatment agent obtained in the examples and comparative examples, the dosage is 20 mg / L, stir for 15 minutes, let it stand and settle for 15 minutes, take the supernatant as a sample for testing:

[0079] 1. COD test: According to the relevant records in HJ 828-2017 "Determination of Chemical Oxygen Demand in Water - Dichromate Method", the COD of the sample is tested and the CDO removal rate is calculated;

[0080] 2. Turbidity test: Test the turbidity of the sample according to the relevant records in GB / T 13200-1991 "Determination of Turbidity of Water Quality";

[0081] 3. Cu 2+ Test: Determination of Cu in samples 2+ Content, calculate Cu 2+ Removal rate.

[0082] The above test results are shown in Table 1:

[0083] Table 1 Performance test results

[0084]

[0085] According to Table 1, combining Examples 1, 6, and 7 with Comparative Example 1, it can be seen that the removal rates of Examples 6, 7, and Comparative Example 1 decreased, while the turbidity increased. This is due to the variation in the amount of polypropylene glycol added to the β-cyclodextrin polymer matrix used in Examples 6 and 7. When the amount of polypropylene glycol was reduced, the stability of the polyferric chloride carrier structure decreased, and its effect on the flocculation effect of the water purifier was reduced. The performance decline in Comparative Example 1 was more significant. When the amount of polypropylene glycol was increased, the pores of the β-cyclodextrin were occupied, making it difficult for the polyferric chloride to enter the cavity structure of the polymer inclusion complex, resulting in reduced stability and a reduced flocculation effect.

[0086] Combining Example 1 and Example 8, it can be seen that the removal rate of Example 8 is improved and the turbidity is reduced. The reason is that the β-cyclodextrin polymer matrix in Example 8 is compounded with a block copolymer of polypropylene glycol and polyethyleneimine. The resulting water purifier not only has improved structural stability and the loading capacity of polyferric chloride, but also can synergize with polyferric chloride to enhance the charge neutralization and adsorption bridging ability of polyferric chloride, thereby improving the water purification effect and water purification rate of the water purifier.

[0087] Combining Example 1 and Comparative Example 2, it can be seen that the removal rate of Comparative Example 2 decreases and the turbidity increases. The reason is that the β-cyclodextrin polymer matrix and the polyferric chloride in Comparative Example 2 are directly mixed and no polymer inclusion structure is formed. The polyferric chloride is adsorbed on the surface of the β-cyclodextrin polymer matrix during the mixing process, and the polyferric chloride particles can still be in direct contact with each other. Although the overall structural stability can be improved, the polyferric chlorides are attracted to each other, and the decomposition-precipitation reaction that occurs is difficult to control. There is still a problem of excessive flocculation speed and rapid failure of the flocculation effect, which greatly affects the sewage treatment capacity.

[0088] Combining Example 1 and Comparative Example 3, it can be seen that the removal rate of Comparative Example 3 decreases and the turbidity increases. On the one hand, the inorganic carrier does not have a strong enhancing effect on the flocculation effect of polyferric chloride compared to the β-cyclodextrin polymer matrix carrier of the present invention. Moreover, if no corresponding chemical bonding is provided between polyferric chloride and the inorganic carrier, the binding force between the two is poor, and the structural stability of the obtained water purifier will decrease. The polymer inclusion structure can completely cover the polyferric chloride, and the inclusion and immobilization of polyferric chloride can be achieved without chemical bonding, and it also has a certain sustained-release control effect.

[0089] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0090] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A polyferric chloride high-efficiency water purifier, characterized in that, The polyferric chloride high-efficiency water purifier is a polymer inclusion structure; the polyferric chloride high-efficiency water purifier comprises polyferric chloride and a β-cyclodextrin polymer matrix loaded with polyferric chloride; The raw materials of the β-cyclodextrin polymer matrix include β-cyclodextrin and polypropylene glycol block copolymerized polyethyleneimine in a mass ratio of 100:(3-6); The raw materials of the polypropylene glycol block copolymer polyethyleneimine include carboxyl-terminated polypropylene glycol monomethyl ether and polyethyleneimine in a molar ratio of 1: (0.1-0.15); The β-cyclodextrin polymer matrix is ​​prepared according to the following method: Add β-cyclodextrin to water, raise the temperature to 50-60°C, stir and dissolve, then add polypropylene glycol block copolymer polyethyleneimine, ultrasonically disperse for 10-20 minutes, let stand for 10-15 hours, and then filter, wash and dry to obtain a β-cyclodextrin polymer matrix; The production process of the polyferric chloride high-efficiency water purifier comprises the following process steps: The beta-cyclodextrin polymer matrix is ​​added to a solvent, polyferric chloride and a plasticizer are added, and the mixture is stirred for 2 to 3 hours. The solvent is slowly evaporated at room temperature, and finally the polyferric chloride high-efficiency water purifier is separated in an ice-water mixture. The solvent includes one of N,N-dimethylformamide, N-methylpyrrolidone, N,N-dimethylacetamide and triethyl phosphate.

2. The polyferric chloride high-efficiency water purifier according to claim 1, characterized in that The mass ratio of the polyferric chloride to the β-cyclodextrin polymer matrix is ​​(0.4-0.5):

1.

3. The polyferric chloride high-efficiency water purifier according to claim 1, characterized in that The polypropylene glycol block copolymerized polyethyleneimine is prepared according to the following method: Add carboxyl-terminated polypropylene glycol monomethyl ether to a buffer solution, adjust the solution pH to 6-6.5, add a carboxyl activator and stir for 20-30 minutes, add polyethyleneimine, stir and react at room temperature for 10-15 hours, and finally dialyze, distill under reduced pressure and dry to obtain the product.

4. The polyferric chloride high-efficiency water purifier according to claim 1, characterized in that The plasticizer includes one or more of 2-nitrophenyl octyl ether, triacetyl citrate and butyl stearate.

5. The polyferric chloride high-efficiency water purifier according to claim 1, characterized in that The added amount of the plasticizer is 6-8% of the mass of the β-cyclodextrin polymer matrix.

6. An application of a polyferric chloride high-efficiency water purifier according to any one of claims 1 to 5, characterized in that: The polyferric chloride high-efficiency water purifier can be applied to any one of tap water purification treatment, industrial sewage treatment, domestic sewage treatment, wastewater decolorization and sludge treatment.

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