Polyferric chloride efficient water purifying agent as well as production process and application thereof

Abstract

The invention discloses a polyferric chloride high-efficiency water purifying agent and a production process and application thereof, and belongs to the technical field of water purifying agents, the polyferric chloride high-efficiency water purifying agent is of a polymer inclusion structure; the polyferric chloride high-efficiency water purifying agent comprises polyferric chloride and a beta-cyclodextrin polymer matrix loaded with the polyferric chloride. Through beta-cyclodextrin polymer matrix carrier loading, the stability of polyferric chloride can be effectively improved, a polymer inclusion structure can integrate the advantages of a polymer matrix and polyferric chloride, good stability and structure adjustability are achieved, the advantages of the polymer matrix and the polyferric chloride can be integrated, the sewage treatment capacity is improved, and the sewage treatment efficiency is improved. The utilization rate of polymerization ferric chloride is effectively improved. In addition, polypropylene glycol block copolymerized polyethyleneimine can be compounded in a beta-cyclodextrin polymer matrix, so that the charge neutralization and adsorption bridging effects of polyferric chloride can be enhanced, and heavy metal ions in sewage can be chelated, so that the water purification effect and the water purification efficiency are improved, and an efficient water purification agent is obtained.

Description

Technical Field

[0001] The 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 to convert them into non-toxic and stable substances. This process is usually achieved by adding various agents 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 ability, the accumulation of aluminum salts will affect human health and is not conducive to water purification. Compared with aluminum salt coagulants, iron salt coagulants have the advantages of safety, non-toxicity and 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 purpose of the present invention is to provide a polyferric chloride high-efficiency water purifier and a production process and application thereof, so as to solve the problem that polyferric chloride has poor stability 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 is 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 scheme, 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, and no substances harmful to the environment 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 stability of the polyferric chloride can be effectively improved by carrier loading, especially for some occasions requiring high-concentration polyferric chloride. Under high-concentration conditions, the hydrolysis-precipitation reaction of the polyferric chloride is accelerated, and it is difficult to maintain stability during long-term storage. The β-cyclodextrin polymer matrix can provide adsorption sites and storage space for the polyferric chloride, and a relatively closed space is constructed to reduce the influence of adverse external factors on the polyferric chloride flocculant, thereby improving the stability of the obtained water purifier.

[0011] Compared with other organic or inorganic carriers, such as diatomaceous earth and polyacrylamide, although the stability of polyferric chloride can be improved to a certain extent, the flocculation ability of polyferric chloride will be affected. 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, and the large specific surface area and porosity provide sufficient loading amount and mass transfer area, which combines the advantages of the carrier and polyferric chloride, not only has good stability and structural adjustability, but also can combine the advantages of both, 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 and improve the flocculation effect. The water purifier loaded with the β-cyclodextrin polymer matrix can help optimize the effective use conditions of polyferric chloride, making it easier for pollutants to react 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, raise the temperature to 50-60° C., add polypropylene glycol after stirring and dissolving, perform ultrasonic dispersion for 10-20 minutes, let stand for 10-15 hours, and then obtain the β-cyclodextrin polymer matrix through suction filtration, washing and drying.

[0016] By adopting the above technical scheme, 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 therewith, 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 compound, 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 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, and then 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 reaction is stirred for 3-4 hours, and finally, the 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 4-6% 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 0.5-1%.

[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 scheme, carboxylated polypropylene glycol monomethyl ether reacts with the amino group in polyethylene imine to obtain a block copolymer of polypropylene glycol and polyethylene imine. The block copolymer finally obtained is then compounded with β-cyclodextrin to obtain a β-cyclodextrin polymer matrix.

[0028] The addition of polyethyleneimine can improve the grafting and compounding between polypropylene glycol and β-cyclodextrin, form a more stable polymer network, and increase the adsorption sites of polyferric chloride. On the other hand, polyethyleneimine contains a large amount of cationic positive charges, which can enhance the charge neutralization effect of polyferric chloride. The positive charge can help compress the double layer of negatively charged colloidal particles in the water, reduce the electrostatic repulsion between particles, and promote the coagulation between particles, thereby forming a larger flocculation precipitate. In addition, the long chain structure of polyethyleneimine and polypropylene glycol can form a bridge between sewage particles, thereby improving the adsorption and bridging effect of polyferric chloride and forming a larger floc. The flocculation effect of the water purifier obtained by compounding 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 cationicity, 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 also 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 amount of plasticizer added 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 to reduce the interaction force between the molecules, thereby increasing the activity of the chain segments, making the β-cyclodextrin polymer matrix softer and having better ductility, thereby 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 influence on the flocculation effect and water purification efficiency of the polyferric chloride.

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

[0035] The beta-cyclodextrin polymer matrix is ​​added to the solvent, and the polyferric chloride and the plasticizer are added, and the mixture is stirred for 2 to 3 hours, and 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 one of tap water purification treatment, 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. Through 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 has good stability and structural adjustability, but also can combine the advantages of both, improve the sewage treatment capacity, and effectively improve the utilization rate of polyferric chloride. And polypropylene glycol is added to pre-treat β-cyclodextrin, and the obtained β-cyclodextrin polymer matrix structure is more stable.

[0040] 2. The polypropylene glycol block added to the β-cyclodextrin polymer matrix of the present invention is copolymerized with polyethyleneimine, which can not only form a more stable polymer network, but also enhance the charge neutralization and adsorption bridging effects of polyferric chloride, promote the coagulation between particles, thereby forming a larger flocculation precipitate; and can chelate heavy metal ions in sewage to form a stable complex, thereby improving the water purification effect and efficiency, and obtaining an 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0042] Preparation Example 1

[0043] Preparation Example 1-1, a polypropylene glycol block copolymer polyethyleneimine, is 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, the pH value was further adjusted to 3.5, and the reaction was stirred for 3 h. Finally, carboxyl-terminated polypropylene glycol monomethyl ether was obtained by extraction, filtration, reduced pressure distillation and drying.

[0045] Take 0.1 mol of the above-obtained carboxyl-terminated polypropylene glycol monomethyl ether and add it to 250 mL of MES buffer, adjust the solution pH to 6, add 0.1 mol of carboxyl activator, wherein the carboxyl activator is a mixture of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide in a molar ratio of 1:0.5, stir and mix for 30 minutes, add 0.01 mol of polyethyleneimine (average molecular weight of 5000), stir and react at room temperature for 15 hours, and finally dialyze, distill under reduced pressure and dry to obtain the product.

[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 is ​​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, 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, is different 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, is different from Preparation Example 2-1 only in that the amount of polypropylene glycol added is 3 g.

[0052] Preparation Example 2-4, a β-cyclodextrin polymer matrix, is different from Preparation Example 2-1 only in that the amount of polypropylene glycol added is 6 g.

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

[0054] Preparation Example 2-6, a β-cyclodextrin polymer matrix, is different from Preparation Example 2-1 only in that the amount of polypropylene glycol added is 8 g.

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

[0056] Preparation Example 2-8, a β-cyclodextrin polymer matrix, is different from Preparation Example 2-1 only in that an equal amount of polypropylene glycol block copolymer polyethyleneimine prepared in Preparation Example 1-2 is used to replace polypropylene glycol.

[0057] Example

[0058] Example 1, a polyferric chloride high-efficiency water purifier, is prepared according to the following process steps:

[0059] 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.

[0060] Example 2, a polyferric chloride high-efficiency water purifier, is different from Example 1 only in that the amount of polyferric chloride added is 40g; the amount of 2-nitrophenyl octyl ether added is 6g.

[0061] Example 3, a polyferric chloride high-efficiency water purifier, is different from Example 1 only in that the amount of polyferric chloride added is 50g; the amount of 2-nitrophenyl octyl ether added is 8g.

[0062] Example 4, a polyferric chloride high-efficiency water purifier, is different 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.

[0063] Example 5, a polyferric chloride high-efficiency water purifier, is different 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.

[0064] Example 6, a polyferric chloride high-efficiency water purifier, is different 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.

[0065] Example 7, a polyferric chloride high-efficiency water purifier, is different 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.

[0066] Example 8, a polyferric chloride high-efficiency water purifier, is different 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.

[0067] Example 9, a polyferric chloride high-efficiency water purifier, is different 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.

[0068] Example 10, a polyferric chloride high-efficiency water purifier, is different from Example 1 only in that 2-nitrophenyl octyl ether is not added.

[0069] 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.

[0070] 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.

[0071] Comparative Example

[0072] Comparative Example 1, a polyferric chloride high-efficiency water purifier, is prepared according to the following process steps:

[0073] 100 g of β-cyclodextrin was added to 250 mL of N,N-dimethylformamide, and 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.

[0074] Comparative Example 2, a polyferric chloride high-efficiency water purifier, is prepared according to the following process steps:

[0075] 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 hours to prepare a polyferric chloride high-efficiency water purifier.

[0076] Comparative Example 3, a polyferric chloride high-efficiency water purifier, is prepared according to the following process steps:

[0077] 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.

[0078] Performance testing

[0079] Sample preparation: organic sewage from urban rivers was collected, with an influent COD content of 350 mg / L and Cu 2+ 42.8 mg / L, take 500 mL of the above sewage, add the composite polyaluminum chloride water treatment agent obtained in the embodiment and the comparative example, the dosage is 20 mg / L, stir for 15 minutes and then let it stand for 15 minutes, take the supernatant as a sample for testing:

[0080] 1. COD test: According to the relevant records in HJ 828-2017 "Determination of Chemical Oxygen Demand of Water Quality - Dichromate Method", the COD of the sample is tested and the CDO removal rate is calculated;

[0081] 2. Turbidity test: According to the relevant records in GB / T 13200-1991 "Determination of turbidity of water quality", the turbidity of the sample is tested;

[0082] 3. Cu 2+ Test: Determination of Cu in samples 2+ Content, calculate Cu 2+ Removal rate.

[0083] The above test results are shown in Table 1:

[0084] Table 1 Performance test results

[0085]

[0086] According to Table 1, in combination with Example 1, Example 6, Example 7 and Comparative Example 1, it can be seen that the removal rates of Example 6, Example 7 and Comparative Example 1 have decreased, and the turbidity has increased. The reason is that the amount of polypropylene glycol added to the β-cyclodextrin polymer matrix used in Example 6 and Example 7 has changed. When the amount of polypropylene glycol is reduced, the stability of the carrier structure of polyferric chloride is reduced, and the promoting effect on the flocculation effect of the water purifier is reduced. The performance of Comparative Example 1 has decreased more significantly. When the amount of polypropylene glycol increases, the pores of β-cyclodextrin are occupied, and it is difficult for polyferric chloride to enter the cavity structure of the polymer inclusion compound, resulting in decreased stability and decreased flocculation effect.

[0087] 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 block copolymer of polypropylene glycol and polyethyleneimine is used for compounding in the β-cyclodextrin polymer matrix in Example 8, and the obtained 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.

[0088] 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 is difficult to control. There is still a problem of too fast flocculation speed and fast failure of the flocculation effect, which will greatly affect the sewage treatment capacity.

[0089] 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, and 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.

[0090] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0091] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present 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.

2. The polyferric chloride high-efficiency water purifier according to claim 1, characterized in that: The mass ratio of the polyferric chloride to the beta-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 raw materials of the beta-cyclodextrin polymer matrix include beta-cyclodextrin and polypropylene glycol in a mass ratio of 100:(3-6).

4. The polyferric chloride high-efficiency water purifier according to claim 3, characterized in that: The β-cyclodextrin polymer matrix is ​​prepared according to the following method: Add β-cyclodextrin to water, raise the temperature to 50-60° C., add polypropylene glycol after stirring and dissolving, perform ultrasonic dispersion for 10-20 minutes, let stand for 10-15 hours, and then obtain the β-cyclodextrin polymer matrix through suction filtration, washing and drying.

5. The polyferric chloride high-efficiency water purifier according to claim 3, characterized in that: The polypropylene glycol block is 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).

6. The polyferric chloride high-efficiency water purifier according to claim 5, characterized in that: The polypropylene glycol block copolymer 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.

7. The polyferric chloride high-efficiency water purifier according to claim 1, characterized in that: The raw materials of the polyferric chloride high-efficiency water purifier also include a plasticizer; the plasticizer includes a combination of one or more of 2-nitrophenyl octyl ether, triacetyl citrate and butyl stearate.

8. The polyferric chloride high-efficiency water purifier according to claim 7, characterized in that: The added amount of the plasticizer is 6-8% of the mass of the β-cyclodextrin polymer matrix.

9. A production process of a polyferric chloride high-efficiency water purifier according to any one of claims 1 to 8, characterized in that: The process steps include: The beta-cyclodextrin polymer matrix is ​​added to the solvent, and the polyferric chloride and the plasticizer are added, and the mixture is stirred for 2 to 3 hours, and the solvent is slowly evaporated at room temperature, and finally the polyferric chloride high-efficiency water purifier is separated in an ice-water mixture.

10. An application of a polyferric chloride high-efficiency water purifier according to any one of claims 1 to 8, 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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