Composite oxidizing agent water purifying agent

Abstract

The invention discloses a composite oxidizing agent water purifying agent and a preparation method thereof, and relates to the technical field of water treatment. The preparation method comprises the following steps: weighing 2-8 parts of potassium permanganate, 2-8 parts of sodium percarbonate, 5-15 parts of sodium hypochlorite, 2-8 parts of sodium persulfate, 2-8 parts of potassium hydrogen persulfate, 0.2-2 parts of titanium dioxide, 1-3 parts of sulfo-terminated anti-scaling copolymer, 0.5-1.5 parts of black cumin seed regenerated powder, 5-20 parts of polyaluminum chloride, 5-15 parts of ferrite, 0.1-0.5 part of calcium chloride and 0.1-0.5 part of sodium bicarbonate according to the proportion, and uniformly mixing; the composite oxidizing agent water purifying agent is obtained. According to the invention, multiple oxidants are combined for use, and the prepared sulfo-terminated scale inhibition copolymer and black cumin seed regenerated powder are added, so that the water quality problems of standard exceeding of permanganate index, standard exceeding of heavy metal (manganese), standard exceeding of microorganisms, standard exceeding of chromaticity, standard exceeding of turbidity and the like in the technical field of water treatment can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment agents, in particular to a composite oxidizing agent water purifier. Background Art

[0002] At present, the oxidants used in water plants or sewage treatment plants are relatively single. Even if the oxidants are used in combination, multiple sets of equipment are required for addition, which is costly. The dosage and method of adding multiple agents are regulated separately, which is technically difficult to operate and requires high professionalism of water plant personnel. Due to the lack of technical personnel, irrational use of agents is common in small and medium-sized water treatment companies. At the same time, there are many technical defects in the use of single oxidants. For example, sodium hypochlorite has no ability to degrade chlorine-resistant organic matter, can oxidize fewer types of pollutants, and has the risk of excessive by-products; potassium permanganate cannot decompose organic matter containing saturated bonds, there is a color risk in use, and the reaction time required is relatively long; potassium persulfate requires the addition of an activator, otherwise the oxidation effect is very poor.

[0003] Water quality has always been one of the hot issues of social concern. Problems such as excessive permanganate index, excessive heavy metals, excessive microorganisms, excessive color, and excessive turbidity are common in various water bodies, seriously affecting the utilization of water resources and human life. The development of new, efficient, low-cost, and easy-to-operate water treatment agents has important practical significance and broad application prospects. Summary of the invention

[0004] The purpose of the present invention is to provide a composite oxidizing agent water purifier to solve the problems raised in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A composite oxidizing agent water purifier comprises the following raw materials in parts by weight:

[0007] Potassium permanganate 2-8 parts;

[0008] Sodium percarbonate 2-8 parts;

[0009] Sodium hypochlorite 5-15 parts;

[0010] Sodium persulfate 2-8 parts;

[0011] Potassium persulfate 2-8 parts;

[0012] 0.2-2 parts of titanium dioxide;

[0013] 1-3 parts of sulfonic acid terminated anti-scaling copolymer;

[0014] 0.5-1.5 parts of black cumin seed regeneration powder;

[0015] 5-20 parts of polyaluminium chloride;

[0016] 5-15 parts of ferrous salt;

[0017] Calcium chloride 0.1-0.5 parts;

[0018] Sodium bicarbonate 0.1-0.5 parts;

[0019] The steps for preparing the sulfonic acid terminated anti-scaling copolymer are as follows:

[0020] A1. Place 2-acrylamide-2-methylpropanesulfonic acid and sodium hypophosphite in a three-necked flask, place the three-necked flask in an oil bath, gradually heat up to 80° C. within 1 hour, mix acrylic acid, ammonium persulfate and water to obtain a mixed solution, gradually introduce acrylic acid and ammonium persulfate solution into the three-necked flask during the heating process, and continue to react at 80° C. for 0.5 hour to obtain an intermediate product;

[0021] A2. Dissolve the intermediate product in ultrapure water, add sublimed sulfur and sodium hydroxide, heat to 95°C in an oxygen atmosphere and react for 36 hours, centrifuge at a speed of 6000-7000 r / min for 15 minutes to obtain a supernatant, dialyze the supernatant with ultrapure water, dry in a freeze dryer for 24 hours, and grind to obtain a sulfonic acid-terminated anti-scaling copolymer.

[0022] Furthermore, in A1, the usage ratio of 2-acrylamide-2-methylpropanesulfonic acid, sodium hypophosphite, acrylic acid, ammonium persulfate and water is 2g:(0.65-0.8)g:3.3g:(0.35-0.4)g:5mL; in A2, the usage ratio of the intermediate product, ultrapure water, sublimated sulfur and sodium hydroxide is 3g:200mL:4.8g:10g.

[0023] Furthermore, the molecular weight of the sulfonic acid terminated antiscaling copolymer is 1000-3000.

[0024] Furthermore, the black cumin seed regeneration powder is obtained by post-processing the waste residue obtained after extracting black cumin seed oil from black cumin seeds, and the post-processing steps are as follows:

[0025] The waste residue was washed three times with distilled water, dried in a drying oven at 80°C for 24 h, crushed with a grinder, and sieved with a sieve with an aperture of 0.5 mm to obtain a uniform powder waste residue. The uniform powder waste residue was poured into a sodium hydroxide solution with a concentration of 0.3 mol / L. 100 mL of sodium hydroxide solution was used for every 1 g of uniform powder waste residue. After slowly stirring at room temperature for 24 h, it was dried in a drying oven at 80°C for 24 h to obtain black cumin seed regenerated powder.

[0026] Furthermore, the aluminum oxide content in the polyaluminium chloride is not less than 30%, the basicity is 40%-90%, and the water-insoluble matter content does not exceed 0.5%.

[0027] Furthermore, the method for using the composite oxidizing agent water purifier is as follows: adding the composite oxidizing agent water purifier to the raw water or sewage at 1%-2% of the weight of the raw water or sewage.

[0028] The preparation method of a composite oxidizing agent water purifier is as follows: potassium permanganate, sodium percarbonate, sodium hypochlorite, sodium persulfate, potassium hydrogen persulfate, titanium dioxide, sulfonyl-terminated anti-scaling copolymer, black cumin seed regeneration powder, polyaluminium chloride, ferrous salt, calcium chloride and sodium bicarbonate are weighed according to a proportion and mixed evenly to obtain a composite oxidizing agent water purifier.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. Multiple oxidants are used together to achieve complementary advantages. Sodium hypochlorite, potassium persulfate and other agents provide an acidic environment, which can enhance the oxidizing ability of potassium permanganate and is conducive to the generation of sulfate free radicals; manganese dioxide generated after potassium permanganate hydrolysis can activate potassium persulfate to produce stronger sulfate free radicals and stronger oxidizing ability; sodium percarbonate releases hydrogen peroxide to assist potassium permanganate in oxidizing organic matter; sodium hypochlorite, potassium persulfate, sodium percarbonate, etc. can remove sulfides, organic sulfides and other substances that interfere with the reaction of potassium permanganate, improve the utilization rate of potassium permanganate, and make the removal effect of potassium permanganate on other pollutants more stable; sodium persulfate and potassium persulfate can both produce sulfate free radicals and synergistically degrade organic pollutants; sodium hypochlorite and potassium permanganate synergistically kill bacteria and improve the disinfection effect; titanium dioxide can produce free radicals under ultraviolet irradiation, synergistically with oxidants, improve oxidation efficiency, assist in oxidative degradation of organic matter, and kill microorganisms. By using multiple oxidants in combination, the proportion of potassium permanganate and the total amount of dosage can be reduced, thereby reducing the risk of chromaticity. Each oxidant has pollutants such as organic matter or algae that cannot be removed. By using multiple oxidants in combination, the range of pollutants that can be removed by the agent is expanded, thereby improving the removal rate of multiple pollutants.

[0031] 2. The sulfonic acid-terminated anti-scaling copolymer has the dual effects of scale inhibition and antibacterial. On the one hand, the hydrophilic sulfonic acid groups and carboxylic acid groups in the sulfonic acid-terminated anti-scaling copolymer have good scale inhibition and dispersibility, and show better chelating ability for calcium ions and magnesium ions. In the crystallization process of scale compounds such as calcium carbonate, magnesium hydroxide, magnesium carbonate, and calcium sulfate, the scale inhibitor physically adsorbs on the surface of the microcrystal, occupies the active sites on the surface of the crystal growth structure, deforms the lattice of the scale compound and creates defects on the outside of the crystal. As a result, the scale becomes soft, thereby inhibiting the ability of the scale compound to nucleate and grow. In addition, the sulfur quantum dots on the surface of the sulfonic acid-terminated anti-scaling copolymer continuously collide with the anions that form the scale, hindering their further combination with calcium ions and magnesium ions, and reducing the possibility of mineral scale precipitation. The sulfonic acid and carboxylic acid groups in the molecular structure have weak interactions with calcium ions and magnesium ions, and can continuously capture and release calcium ions and magnesium ions. This dynamic process indirectly enhances the tolerance of calcium ions and magnesium ions in water, thereby exerting a dynamic inhibitory effect. On the other hand, sulfonyl-terminated anti-scaling copolymers can effectively inhibit the growth of Bacillus subtilis and some algae. The sulfur core within the structure of sulfonyl-terminated anti-scaling copolymers mainly contributes to its antibacterial activity, and the binding of intermediates to the surface of sulfur quantum dots helps to interact with the bacterial cell wall, thereby enhancing the antibacterial effect. The antibacterial activity of sulfonyl-terminated anti-scaling copolymers is mainly attributed to their ability to destroy microbial cell membranes: membrane permeability increases, leading to cell lysis. Sulfonyl-terminated anti-scaling copolymers can also induce the production of reactive oxygen species under light, including superoxide anions and hydroxyl radicals, which can cause oxidative stress in microbial cells and damage important components such as DNA, proteins and lipids. In addition, sulfur quantum dots can inhibit basic enzyme activity and interfere with enzyme-substrate interactions, thereby disrupting metabolic processes that are critical to microbial survival.

[0032] 3. Black cumin seed regeneration powder has strong heavy metal adsorption capacity. The prepared black cumin seed regeneration powder has a heterogeneous surface morphology, including many protrusions and cavities, and rich functional groups. Because it increases the microscopic surface area of ​​the black cumin seed regeneration powder particles and provides a large number of surface active binding sites, it is conducive to the biosorption of heavy metals. It can be used as a new type of biosorption material for removing heavy metal pollution in water environments, especially excessive manganese. The biosorption of heavy metals by black cumin seed regeneration powder is a spontaneous physical process with excellent heavy metal treatment performance.

[0033] 4. Other auxiliary agents. Polyaluminium chloride and ferrous salts synergistically improve the flocculation effect and remove turbidity; calcium chloride assists flocculation, improves the flocculation effect, and adjusts the water hardness. Sodium bicarbonate can adjust the pH value of water, which is beneficial to flocculation and precipitation.

[0034] 5. In summary, the present invention can solve water quality problems such as excessive permanganate index, excessive heavy metal (manganese), excessive microorganisms, excessive color, and excessive turbidity in the field of water treatment technology. The present invention can be added through only one set of equipment, which is easier to operate, saves fixed asset expenses and energy consumption expenses of water plants, and reduces labor costs. DETAILED DESCRIPTION

[0035] The following will be described clearly and completely in conjunction with 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.

[0036] (1) The steps for preparing the sulfonic acid terminated anti-scaling copolymer are as follows:

[0037] A1. 2 g of 2-acrylamide-2-methylpropanesulfonic acid and 0.8 g of sodium hypophosphite were placed in a three-necked flask, the three-necked flask was placed in an oil bath, the temperature was gradually raised to 80° C. within 1 h, 3.3 g of acrylic acid, 0.4 g of ammonium persulfate and 5 mL of water were mixed to obtain a mixed solution, the acrylic acid and the ammonium persulfate solution were gradually introduced into the three-necked flask during the heating process, and the reaction was continued at 80° C. for 0.5 h to obtain an intermediate product;

[0038] A2. Dissolve 3 g of the intermediate product in 200 mL of ultrapure water, add 4.8 g of sublimated sulfur and 10 g of sodium hydroxide, heat to 95 ° C in an oxygen atmosphere and react for 36 hours, centrifuge at 6500 r / min for 15 minutes to obtain a supernatant, dialyze the supernatant with ultrapure water, dry in a freeze dryer for 24 hours, and grind to obtain a sulfonic acid-terminated anti-scaling copolymer with a molecular weight of 2850.

[0039] (2) The black cumin seed regenerated powder is obtained by post-processing the waste residue obtained after extracting black cumin seed oil from black cumin seeds, and the post-processing steps are as follows:

[0040] The waste residue was washed three times with distilled water, dried in a drying oven at 80°C for 24 h, crushed with a grinder, and sieved with a sieve with an aperture of 0.5 mm to obtain a uniform powder waste residue. The uniform powder waste residue was poured into a sodium hydroxide solution with a concentration of 0.3 mol / L. 100 mL of sodium hydroxide solution was used for every 1 g of uniform powder waste residue. After slowly stirring at room temperature for 24 h, it was dried in a drying oven at 80°C for 24 h to obtain black cumin seed regenerated powder.

[0041] (3) The aluminum oxide content in the polyaluminium chloride is not less than 30%, the basicity is 40%-90%, and the water-insoluble content does not exceed 0.5%;

[0042] Embodiment 1:

[0043] A composite oxidizing agent water purifier comprises the following raw materials in parts by weight:

[0044] Potassium permanganate 5 parts;

[0045] 5 parts of sodium percarbonate;

[0046] 10 parts of sodium hypochlorite;

[0047] Sodium persulfate 5 parts;

[0048] Potassium persulfate 5 parts;

[0049] 1.1 parts of titanium dioxide;

[0050] 2 parts of sulfonic acid terminated anti-scaling copolymer;

[0051] 1 part black cumin seed regeneration powder;

[0052] 12.5 parts of polyaluminium chloride,

[0053] 10 parts of ferrous salt;

[0054] 0.3 parts of calcium chloride;

[0055] 0.3 parts of sodium bicarbonate;

[0056] A method for preparing a composite oxidizing agent water purifier is as follows:

[0057] Potassium permanganate, sodium percarbonate, sodium hypochlorite, sodium persulfate, potassium hydrogen persulfate, titanium dioxide, sulfonyl-terminated anti-scaling copolymer, black cumin seed regeneration powder, polyaluminium chloride, ferrous salt, calcium chloride and sodium bicarbonate are weighed and mixed uniformly according to a proportion to obtain a composite oxidizing agent water purifier.

[0058] Embodiment 2:

[0059] A composite oxidizing agent water purifier comprises the following raw materials in parts by weight:

[0060] Potassium permanganate 8 parts;

[0061] 8 parts of sodium percarbonate;

[0062] 15 parts of sodium hypochlorite;

[0063] Sodium persulfate 8 parts;

[0064] Potassium persulfate 8 parts;

[0065] 2 parts of titanium dioxide;

[0066] 3 parts of sulfonic acid terminated anti-scaling copolymer;

[0067] 1.5 parts of black cumin seed regeneration powder;

[0068] 20 parts of polyaluminium chloride,

[0069] 15 parts of ferrous salt;

[0070] 0.5 parts of calcium chloride;

[0071] 0.5 parts of sodium bicarbonate;

[0072] A method for preparing a composite oxidizing agent water purifier is as follows:

[0073] Potassium permanganate, sodium percarbonate, sodium hypochlorite, sodium persulfate, potassium hydrogen persulfate, titanium dioxide, sulfonyl-terminated anti-scaling copolymer, black cumin seed regeneration powder, polyaluminium chloride, ferrous salt, calcium chloride and sodium bicarbonate are weighed and mixed uniformly according to a proportion to obtain a composite oxidizing agent water purifier.

[0074] Embodiment 3:

[0075] A composite oxidizing agent water purifier comprises the following raw materials in parts by weight:

[0076] 2 parts of potassium permanganate;

[0077] 2 parts of sodium percarbonate;

[0078] 5 parts of sodium hypochlorite;

[0079] 2 parts of sodium persulfate;

[0080] Potassium persulfate 2 parts;

[0081] 0.2 parts of titanium dioxide;

[0082] 1 part of sulfonic acid terminated scale-inhibiting copolymer;

[0083] 0.5 parts of black cumin seed regeneration powder;

[0084] 5 parts of polyaluminium chloride,

[0085] 5 parts of ferrous salt;

[0086] 0.1 part of calcium chloride;

[0087] 0.1 part of sodium bicarbonate;

[0088] A method for preparing a composite oxidizing agent water purifier is as follows:

[0089] Potassium permanganate, sodium percarbonate, sodium hypochlorite, sodium persulfate, potassium hydrogen persulfate, titanium dioxide, sulfonyl-terminated anti-scaling copolymer, black cumin seed regeneration powder, polyaluminium chloride, ferrous salt, calcium chloride and sodium bicarbonate are weighed and mixed uniformly according to a proportion to obtain a composite oxidizing agent water purifier.

[0090] Comparative Example 1:

[0091] A composite oxidizing agent water purifier comprises the following raw materials in parts by weight:

[0092] Potassium permanganate 21.1 parts;

[0093] 10 parts of sodium hypochlorite;

[0094] 2 parts of sulfonic acid terminated anti-scaling copolymer;

[0095] 1 part black cumin seed regeneration powder;

[0096] 12.5 parts of polyaluminium chloride,

[0097] 10 parts of ferrous salt;

[0098] 0.3 parts of calcium chloride;

[0099] 0.3 parts of sodium bicarbonate;

[0100] A method for preparing a composite oxidizing agent water purifier is as follows:

[0101] Potassium permanganate, sodium hypochlorite, sulfonyl-terminated anti-scaling copolymer, black cumin seed regeneration powder, polyaluminium chloride, ferrous salt, calcium chloride and sodium bicarbonate are weighed and mixed uniformly according to a proportion to obtain a composite oxidising agent water purifier.

[0102] The difference between this comparative example and Example 1 is that sodium percarbonate, sodium persulfate, potassium persulfate and titanium dioxide are not added, and the weight portion of potassium permanganate is changed to 21.1 parts.

[0103] Comparative Example 2:

[0104] A composite oxidizing agent water purifier comprises the following raw materials in parts by weight:

[0105] Potassium permanganate 5 parts;

[0106] 5 parts of sodium percarbonate;

[0107] 10 parts of sodium hypochlorite;

[0108] Sodium persulfate 5 parts;

[0109] Potassium persulfate 5 parts;

[0110] 1.1 parts of titanium dioxide;

[0111] 1 part black cumin seed regeneration powder;

[0112] 12.5 parts of polyaluminium chloride,

[0113] 10 parts of ferrous salt;

[0114] 0.3 parts of calcium chloride;

[0115] 0.3 parts of sodium bicarbonate;

[0116] A method for preparing a composite oxidizing agent water purifier is as follows:

[0117] Potassium permanganate, sodium percarbonate, sodium hypochlorite, sodium persulfate, potassium hydrogen persulfate, titanium dioxide, black cumin seed regeneration powder, polyaluminium chloride, ferrous salt, calcium chloride and sodium bicarbonate are weighed according to a proportion and mixed evenly to obtain a composite oxidizing agent water purifier.

[0118] The difference between this comparative example and Example 1 is that no sulfonic acid-terminated scale-inhibiting copolymer is added.

[0119] Comparative Example 3:

[0120] A composite oxidizing agent water purifier comprises the following raw materials in parts by weight:

[0121] Potassium permanganate 5 parts;

[0122] 5 parts of sodium percarbonate;

[0123] 10 parts of sodium hypochlorite;

[0124] Sodium persulfate 5 parts;

[0125] Potassium persulfate 5 parts;

[0126] 1.1 parts of titanium dioxide;

[0127] 2 parts of sulfonic acid terminated anti-scaling copolymer;

[0128] 12.5 parts of polyaluminium chloride,

[0129] 10 parts of ferrous salt;

[0130] 0.3 parts of calcium chloride;

[0131] 0.3 parts of sodium bicarbonate;

[0132] A method for preparing a composite oxidizing agent water purifier is as follows:

[0133] Potassium permanganate, sodium percarbonate, sodium hypochlorite, sodium persulfate, potassium hydrogen persulfate, titanium dioxide, sulfonyl-terminated anti-scaling copolymer, polyaluminium chloride, ferrous salt, calcium chloride and sodium bicarbonate are weighed and mixed uniformly according to a proportion to obtain a composite oxidising agent water purifier.

[0134] The difference between this comparative example and Example 1 is that no black cumin seed regeneration powder is added.

[0135] Water treatment test:

[0136] The composite oxidizing agent water purifier prepared in Examples 1-3 and Comparative Examples 1-3 was added to the raw water at 1% of the weight of the raw water. The raw water came from mixed industrial wastewater and domestic sewage from an industrial park in the High-tech Zone of Mianyang City. The test results are shown in Table 1.

[0137] Table 1

[0138] Raw water Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 CODMn(mg / L) 7.45 1.16 0.99 1.03 4.61 1.89 1.76 Mn(mg / L) 12.73 0.01 0.01 0.01 0.01 10.53 0.01 Bacillus subtilis (CFU / L) 152 ND ND ND ND ND 105 Chroma(degrees) 26 8 7 8 10 11 11 Turbidity (NTU) 2.60 0.35 0.46 0.43 0.85 0.76 0.79 Compliance with GB5749-2022 no yes yes yes no no no

[0139] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0140] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A composite oxidizing agent water purifier, characterized in that: It includes the following raw materials in parts by weight: Potassium permanganate 2-8 parts; Sodium percarbonate 2-8 parts; Sodium hypochlorite 5-15 parts; Sodium persulfate 2-8 parts; Potassium persulfate 2-8 parts; 0.2-2 parts of titanium dioxide; 1-3 parts of sulfonic acid terminated anti-scaling copolymer; 0.5-1.5 parts of black cumin seed regeneration powder; 5-20 parts of polyaluminium chloride; 5-15 parts of ferrous salt; Calcium chloride 0.1-0.5 parts; Sodium bicarbonate 0.1-0.5 parts; The steps for preparing the sulfonic acid terminated anti-scaling copolymer are as follows: A1. Place 2-acrylamide-2-methylpropanesulfonic acid and sodium hypophosphite in a three-necked flask, place the three-necked flask in an oil bath, gradually heat up to 80° C. within 1 hour, mix acrylic acid, ammonium persulfate and water to obtain a mixed solution, gradually introduce acrylic acid and ammonium persulfate solution into the three-necked flask during the heating process, and continue to react at 80° C. for 0.5 hour to obtain an intermediate product; A2. Dissolve the intermediate product in ultrapure water, add sublimed sulfur and sodium hydroxide, heat to 95°C in an oxygen atmosphere and react for 36 hours, centrifuge at a speed of 6000-7000 r / min for 15 minutes to obtain a supernatant, dialyze the supernatant with ultrapure water, dry in a freeze dryer for 24 hours, and grind to obtain a sulfonic acid-terminated anti-scaling copolymer.

2. A composite oxidizing agent water purifier according to claim 1, characterized in that: In A1, the usage ratio of 2-acrylamide-2-methylpropanesulfonic acid, sodium hypophosphite, acrylic acid, ammonium persulfate and water is 2g:(0.65-0.8)g:3.3g:(0.35-0.4)g:5mL; in A2, the usage ratio of intermediate product, ultrapure water, sublimated sulfur and sodium hydroxide is 3g:200mL:4.8g:10g.

3. The composite oxidizing agent water purifier according to claim 1, characterized in that: The molecular weight of the sulfonic acid terminated anti-scaling copolymer is 1000-3000.

4. A composite oxidizing agent water purifier according to claim 1, characterized in that: The black cumin seed regeneration powder is obtained by post-processing the waste residue obtained after extracting black cumin seed oil from black cumin seeds, and the post-processing steps are as follows: The waste residue was washed three times with distilled water, dried in a drying oven at 80°C for 24 h, crushed with a grinder, and sieved with a sieve with an aperture of 0.5 mm to obtain a uniform powder waste residue. The uniform powder waste residue was poured into a sodium hydroxide solution with a concentration of 0.3 mol / L. 100 mL of sodium hydroxide solution was used for every 1 g of uniform powder waste residue. After slowly stirring at room temperature for 24 h, it was dried in a drying oven at 80°C for 24 h to obtain black cumin seed regenerated powder.

5. The composite oxidizing agent water purifier according to claim 1, characterized in that: The aluminum oxide content in the polyaluminium chloride is not less than 30%, the basicity is 40%-90%, and the water-insoluble matter content does not exceed 0.5%.

6. The composite oxidizing agent water purifier according to claim 1, characterized in that: The method of use is as follows: add the composite oxidizing agent water purifier into the raw water or sewage at 1%-2% of the weight of the raw water or sewage.

7. The method for preparing the composite oxidizing agent water purifier according to any one of claims 1 to 6, characterized in that: Specifically, potassium permanganate, sodium percarbonate, sodium hypochlorite, sodium persulfate, potassium hydrogen persulfate, titanium dioxide, sulfonyl-terminated anti-scaling copolymer, black cumin seed regeneration powder, polyaluminium chloride, ferrous salt, calcium chloride and sodium bicarbonate are weighed and mixed uniformly according to a proportion to obtain a composite oxidising agent water purifier.