CN108503001B - Novel water pollution remediation agent and preparation method thereof - Google Patents
Novel water pollution remediation agent and preparation method thereof Download PDFInfo
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- CN108503001B CN108503001B CN201810313209.1A CN201810313209A CN108503001B CN 108503001 B CN108503001 B CN 108503001B CN 201810313209 A CN201810313209 A CN 201810313209A CN 108503001 B CN108503001 B CN 108503001B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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Abstract
The invention discloses a novel water body pollution repairing agent and a preparation method thereof, belonging to the field of water pollution treatment. The novel water body pollution repairing agent comprises the following components: polymeric ferric trichloride, polymeric aluminum trichloride, polyethyleneimine, bentonite, sodium chloride, lime, adsorbate, sodium carbonate, a pH regulator, trimethyl cyclopropane ammonium chloride, sodium polyacrylate, benzyl triethyl ammonium chloride, sodium dodecyl benzene sulfonate and chitosan. The water pollution restoration agent is prepared by the steps of mixing, stirring, drying and the like. The invention adopts a reinforcing system consisting of benzyltriethylammonium chloride, sodium dodecyl benzene sulfonate and chitosan to reduce SS, COD and BOD of the water body pollution repairing agent.
Description
Technical Field
The invention belongs to the field of water pollution treatment, and particularly relates to a novel water pollution remediation agent and a preparation method thereof.
Background
China is a country with water resource shortage, the per capita water resource amount is only 1/4 in the world, the water resource distribution is seriously uneven, and the problem of how to relieve the problems of water resource shortage, pollution and the like becomes a problem which is not slow at all. At present, the treatment methods of heavy metal wastewater in various countries in the world mainly comprise three types: the first kind is the method of eliminating heavy metal ion from waste water through chemical reaction, and includes neutralization precipitation, sulfide precipitation, ferrite coprecipitation, chemical reduction, electrochemical reduction, high molecular heavy metal trapping agent, etc. The second type is a method for adsorbing, concentrating and separating heavy metals in wastewater under the condition of not changing the chemical forms of the heavy metals, and comprises adsorption, solvent extraction, evaporation and solidification, ion exchange, membrane separation and the like. The third category is a method for removing heavy metals in wastewater by the flocculation, absorption, accumulation, enrichment and the like of microorganisms or plants, wherein the method comprises biological flocculation, biochemical methods, plant ecological restoration and the like.
Polyacrylamide (PAM for short) with molecular formula of [ CH2-CH(CONH2)]n is linear high molecular polymer with molecular weight of 400-2000 ten thousand, and the solid product is white or yellowish powder in appearance, colorless viscous colloid in liquid state, easy to dissolve in water and easy to decompose at temperature over 120 deg.c. Foreign researchers have reported that degradation products of polyacrylamide can be used as nutrients for the vital activities of bacteria, and the nutrients can promote the degradation of polyacrylamide. Therefore, the polyacrylamide is one of the most widely used flocculants, however, the monomer acrylamide of polyacrylamide is a carcinogenic substance, and the application of the polyacrylamide is reduced in many countries at present.
Chinese patent application document 'a domestic sewage treatment agent (application number: ZL 201310670662.5)' discloses a domestic sewage treatment agent, which comprises the following components in percentage by weight: 16 parts of polyferric trichloride, 13 parts of polyacrylamide, 9 parts of polyethyleneimine, 35 parts of bentonite, 18 parts of sodium chloride, 1 part of lime, 25 parts of adsorbate, 1 part of sodium carbonate and 15 parts of pH regulator. The treating agent can effectively treat domestic sewage, has the characteristics of low cost and capability of reducing the pollution of the domestic sewage to the ecological environment, but has certain harm effect on a water body by adopting polyacrylamide as a flocculating agent.
Disclosure of Invention
The invention aims to provide a novel water body pollution repairing agent and a preparation method thereof, and aims to solve the problems of how to optimize components, dosage, methods and the like and improve SS, COD and BOD of the water body pollution repairing agent on the basis of a domestic sewage treating agent disclosed in 'ZL 201310670662.5' in Chinese patent application document.
In order to solve the technical problems, the invention adopts the following technical scheme:
a novel water body pollution repairing agent comprises the following components: polymeric ferric trichloride, polymeric aluminum trichloride, polyethyleneimine, bentonite, sodium chloride, lime, adsorbate, sodium carbonate, a pH regulator, trimethyl cyclopropane ammonium chloride, sodium polyacrylate, benzyl triethyl ammonium chloride, sodium dodecyl benzene sulfonate and chitosan;
the weight ratio of the benzyltriethylammonium chloride to the sodium dodecyl benzene sulfonate to the chitosan is (4-8): (2-4): (3-5).
Preferably, the weight ratio of the benzyltriethylammonium chloride to the sodium dodecyl benzene sulfonate to the chitosan is 6:3: 4.
Preferably, the adsorbate is activated carbon, zeolite, wood chips and diatomite in a weight ratio of 3: 1: 2: 3 in a mixture of two or more.
Preferably, the pH adjuster is one of sodium hydroxide, potassium hydroxide, or calcium hydroxide.
Preferably, the repairing agent comprises the following components in parts by weight: 20-25 parts of polyferric trichloride, 23-28 parts of polyaluminum trichloride, 12-16 parts of polyethyleneimine, 14-18 parts of bentonite, 8-12 parts of sodium chloride, 13-17 parts of lime, 6-9 parts of adsorbate, 4-10 parts of sodium carbonate, 4-8 parts of pH regulator, 10-14 parts of trimethyl cyclopropane ammonium chloride, 8-14 parts of sodium polyacrylate, 4-8 parts of benzyl triethyl ammonium chloride, 2-4 parts of sodium dodecyl benzene sulfonate and 3-5 parts of chitosan.
The invention also provides a preparation method of the novel water body pollution repairing agent, which comprises the following steps:
s1: crushing the adsorbate into powder, adding bentonite, sodium chloride, lime, sodium carbonate and a pH regulator according to parts by weight, mixing, and adding deionized water to prepare a mixture A;
s2: adding trimethyl cyclopropane ammonium chloride, sodium polyacrylate, benzyl triethyl ammonium chloride, sodium dodecyl benzene sulfonate and chitosan into the mixture A, stirring and uniformly mixing, and vibrating for 20-25min by ultrasonic waves to obtain a mixture B;
s3: and sequentially adding polyferric trichloride, polyaluminum trichloride and polyethyleneimine into the mixture B, uniformly stirring, stirring for 20-30min, adding deionized water, washing for 2-3 times, and drying to obtain the novel water body pollution repairing agent.
Preferably, the adsorbate is pulverized into powder in step S1 and then sieved through a 200-260 mesh sieve.
Preferably, in the step S3, the polymeric ferric trichloride, the polymeric aluminum trichloride and the polyethyleneimine are added at intervals of 6-8min while stirring.
Preferably, the drying in the step S3 is performed under the conditions of 100-110 ℃.
The invention has the following beneficial effects:
(1) as can be seen from the data of examples 1-3 and comparative example 5, the SS value, COD value and BOD value of the water body pollution remediation agent prepared in examples 1-3 are significantly lower than those of the sewage treatment agent prepared in comparative example 5; meanwhile, as can be seen from the data of examples 1 to 3, example 2 is the most preferred example.
(2) As can be seen from the data of the example 2 and the comparative examples 1 to 4, the benzyltriethylammonium chloride, the sodium dodecyl benzene sulfonate and the chitosan play a synergistic role in preparing the water body pollution restoration agent, and the SS value, the COD value and the BOD value of the water body pollution restoration agent are synergistically reduced; this is:
chitosan has chelating and adsorbing effects on many substances, and its amino group and hydroxyl group adjacent to the amino group are associated with many metal ions (such as Hg)2+、Ni2+、Cu2+、Pb2+、Ca2+、Ag+Etc.) can form stable chelate so as to remove various harmful metal ions from water. Chitosan has a long-chain structure with many free-NH groups on the chain2The chitosan has lone pair electrons, makes amino weakly alkaline, and can combine a hydrogen proton from a solution, thereby making the chitosan become a polyelectrolyte with positive charges. The natural water body is an electronegative colloid system due to the existence of clay and bacteria, the chitosan can simultaneously play double roles of electric neutralization and coagulation and bonding and bridging, and coarse and fine particles in the water are coagulated into large flocs through electrostatic attraction and adsorption and then are settled, so that BOD, COD and SS in the water are reduced. The chitosan contains hydroxyl, amino, N-acetamido and other polar groups, can be subjected to hydrolysis, acetylation, hydroxymethylation, sulfonation, oxidation and other reactions, and can also be subjected to a crosslinking reaction under the action of bifunctional aldehyde or anhydride and other crosslinking agents. Benzyltriethylammonium chloride is used as a catalyst and can catalyze the alkylation reaction of chitosan; sodium dodecyl benzene sulfonate as anionic surfactant can modify the surface of chitosan to produce alkylation reaction in the presence of benzyltriethylammonium chloride, and the reaction activity of amino group is higher than that of hydroxyl group to produce alkylated N-chitosan derivative. The molecule of the N-chitosan alkylated derivative has a long-chain structure, and is lapped on two or more colloids or particles like a bridge and acts with the surfaces of the colloids or the particles by the active group of the molecule, so that the colloids and the particles are connected to form flocculation groups, fine particles in sewage are flocculated into larger floccules to adsorb and trap bubbles, and the floating of the particles is accelerated. In addition, after the polar group of the sodium dodecyl benzene sulfonate is adsorbed on the surface of the hydrophilic suspended particle, the non-polar group side faces to water, so that the hydrophilic substance can be converted into the hydrophobic substance, and the hydrophilic substance can be converted into the hydrophobic substanceThe sodium dialkyl benzene sulfonate is adhered to the fine bubbles to accelerate the floating of suspended particles, so that the suspended particles are adsorbed to reduce the SS value, the COD value and the BOD value in the water body.
(3) As can be seen from the data of comparative examples 6-8, the weight ratio of benzyltriethylammonium chloride, sodium dodecylbenzenesulfonate, chitosan is different from (4-8): (2-4): (3-5), the SS value, the COD value and the BOD value of the prepared water body pollution remediation agent are greatly different from those of the examples 1-3, are far larger than those of the examples 1-3, and are equivalent to those of the prior art (comparative example 5). The benzyl triethyl ammonium chloride, the sodium dodecyl benzene sulfonate and the chitosan are used as a reinforcing system, and the weight ratio of the benzyl triethyl ammonium chloride, the sodium dodecyl benzene sulfonate and the chitosan is (4-8): (2-4): (3-5) the flocculation, adsorption and other effects of chitosan are utilized in a reinforcing system; the alkylation catalysis of the benzyltriethylammonium chloride and the surface activity of the sodium dodecyl benzene sulfonate are utilized to carry out surface modification on the chitosan, and the characteristics of flocculation, adsorption and the like of the chitosan are promoted, so that the SS value, the COD value and the BOD value of the water pollution remediation agent are reduced by a reinforcement system consisting of the benzyltriethylammonium chloride, the sodium dodecyl benzene sulfonate and the chitosan in the water pollution remediation agent.
Detailed Description
In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.
In the embodiment, the novel water body pollution repairing agent comprises the following components in parts by weight: 20-25 parts of polyferric trichloride, 23-28 parts of polyaluminum trichloride, 12-16 parts of polyethyleneimine, 14-18 parts of bentonite, 8-12 parts of sodium chloride, 13-17 parts of lime, 6-9 parts of adsorbate, 4-10 parts of sodium carbonate, 4-8 parts of pH regulator, 10-14 parts of trimethyl cyclopropane ammonium chloride, 8-14 parts of sodium polyacrylate, 4-8 parts of benzyl triethyl ammonium chloride, 2-4 parts of sodium dodecyl benzene sulfonate and 3-5 parts of chitosan. 6:3:4.
The adsorbate is activated carbon, zeolite, wood chips and diatomite in a weight ratio of 3: 1: 2: 3 in a mixture of two or more.
The pH regulator is one of sodium hydroxide, potassium hydroxide or calcium hydroxide.
The preparation method of the novel water body pollution repairing agent comprises the following steps:
s1: crushing the adsorbate into powder, sieving the powder by a 200-plus 260-mesh sieve, adding bentonite, sodium chloride, lime, sodium carbonate and a pH regulator according to parts by weight, mixing, and adding deionized water to prepare a mixture A;
s2: adding trimethyl cyclopropane ammonium chloride, sodium polyacrylate, benzyl triethyl ammonium chloride, sodium dodecyl benzene sulfonate and chitosan into the mixture A, stirring and uniformly mixing, and vibrating for 20-25min by ultrasonic waves to obtain a mixture B;
s3: and sequentially adding polymeric ferric trichloride, polymeric aluminum trichloride and polyethyleneimine into the mixture B, uniformly stirring, stirring for 20-30min, adding deionized water, washing for 2-3 times, and drying at the temperature of 100-110 ℃ to obtain the novel water body pollution repairing agent, wherein the polymeric ferric trichloride, the polymeric aluminum trichloride and the polyethyleneimine are added at intervals of 6-8min while stirring.
Example 1
The novel water pollution restoration agent comprises the following components in parts by weight: 23 parts of polymeric ferric trichloride, 23 parts of polymeric aluminum trichloride, 16 parts of polyethyleneimine, 16 parts of bentonite, 12 parts of sodium chloride, 15 parts of lime, 6 parts of adsorbate, 10 parts of sodium carbonate, 6 parts of pH regulator, 12 parts of trimethyl cyclopropane ammonium chloride, 14 parts of sodium polyacrylate, 4 parts of benzyl triethyl ammonium chloride, 2 parts of sodium dodecyl benzene sulfonate and 3 parts of chitosan.
The adsorbate is activated carbon, zeolite, wood chips and diatomite in a weight ratio of 3: 1: 2: 3 in a mixture of two or more.
The pH regulator is sodium hydroxide.
The preparation method of the novel water body pollution repairing agent comprises the following steps:
s1: crushing the adsorbate into powder, sieving the powder by a 260-mesh sieve, adding bentonite, sodium chloride, lime, sodium carbonate and a pH regulator according to parts by weight, mixing, and adding deionized water to prepare a mixture A;
s2: adding trimethyl cyclopropane ammonium chloride, sodium polyacrylate, benzyl triethyl ammonium chloride, sodium dodecyl benzene sulfonate and chitosan into the mixture A, stirring and uniformly mixing, and vibrating for 25min by ultrasonic waves to obtain a mixture B;
s3: and sequentially adding polyferric trichloride, polyaluminum trichloride and polyethyleneimine into the mixture B, uniformly stirring, stirring for 20min, adding deionized water, washing for 2 times, and drying at 105 ℃ to obtain the novel water body pollution repairing agent, wherein the polyferric trichloride, the polyaluminum trichloride and the polyethyleneimine are added at intervals of 6min while stirring.
Example 2
The novel water pollution restoration agent comprises the following components in parts by weight: 25 parts of polyferric trichloride, 26 parts of polyaluminum trichloride, 12 parts of polyethyleneimine, 18 parts of bentonite, 8 parts of sodium chloride, 17 parts of lime, 7 parts of adsorbate, 4 parts of sodium carbonate, 8 parts of pH regulator, 14 parts of trimethyl cyclopropane ammonium chloride, 8 parts of sodium polyacrylate, 6 parts of benzyl triethyl ammonium chloride, 3 parts of sodium dodecyl benzene sulfonate and 4 parts of chitosan.
The adsorbate is activated carbon, zeolite, wood chips and diatomite in a weight ratio of 3: 1: 2: 3 in a mixture of two or more.
The pH regulator is potassium hydroxide.
The preparation method of the novel water body pollution repairing agent comprises the following steps:
s1: crushing the adsorbate into powder, sieving the powder by a 200-mesh sieve, adding bentonite, sodium chloride, lime, sodium carbonate and a pH regulator according to parts by weight, mixing, and adding deionized water to prepare a mixture A;
s2: adding trimethyl cyclopropane ammonium chloride, sodium polyacrylate, benzyl triethyl ammonium chloride, sodium dodecyl benzene sulfonate and chitosan into the mixture A, stirring and uniformly mixing, and vibrating for 20min by ultrasonic waves to obtain a mixture B;
s3: and sequentially adding polyferric trichloride, polyaluminum trichloride and polyethyleneimine into the mixture B, uniformly stirring, stirring for 25min, adding deionized water, washing for 3 times, and drying at 110 ℃ to obtain the novel water body pollution repairing agent, wherein the polyferric trichloride, the polyaluminum trichloride and the polyethyleneimine are added at intervals of 7min while stirring.
Example 3
The novel water pollution restoration agent comprises the following components in parts by weight: 20 parts of polyferric trichloride, 28 parts of polyaluminum trichloride, 14 parts of polyethyleneimine, 14 parts of bentonite, 10 parts of sodium chloride, 13 parts of lime, 9 parts of adsorbate, 8 parts of sodium carbonate, 4 parts of pH regulator, 10 parts of trimethyl cyclopropane ammonium chloride, 10 parts of sodium polyacrylate, 8 parts of benzyl triethyl ammonium chloride, 4 parts of sodium dodecyl benzene sulfonate and 5 parts of chitosan.
The adsorbate is activated carbon, zeolite, wood chips and diatomite in a weight ratio of 3: 1: 2: 3 in a mixture of two or more.
The pH regulator is calcium hydroxide.
The preparation method of the novel water body pollution repairing agent comprises the following steps:
s1: crushing the adsorbate into powder, sieving the powder by a 240-mesh sieve, adding bentonite, sodium chloride, lime, sodium carbonate and a pH regulator according to parts by weight, mixing, and adding deionized water to prepare a mixture A;
s2: adding trimethyl cyclopropane ammonium chloride, sodium polyacrylate, benzyl triethyl ammonium chloride, sodium dodecyl benzene sulfonate and chitosan into the mixture A, stirring and uniformly mixing, and vibrating for 23min by ultrasonic waves to obtain a mixture B;
s3: and sequentially adding polyferric trichloride, polyaluminum trichloride and polyethyleneimine into the mixture B, uniformly stirring, stirring for 30min, adding deionized water, washing for 2 times, and drying at 100 ℃ to obtain the novel water body pollution repairing agent, wherein the polyferric trichloride, the polyaluminum trichloride and the polyethyleneimine are added at intervals of 8min while stirring.
Comparative example 1
The preparation method is basically the same as that of the example 2, except that raw materials for preparing the novel water body pollution repairing agent lack benzyltriethylammonium chloride, sodium dodecyl benzene sulfonate and chitosan.
Comparative example 2
The preparation method is basically the same as that of the example 2, except that benzyltriethylammonium chloride is absent in the raw materials for preparing the novel water body pollution remediation agent.
Comparative example 3
The preparation method is basically the same as that of the example 2, except that the raw materials for preparing the novel water body pollution repairing agent lack sodium dodecyl benzene sulfonate.
Comparative example 4
The preparation method is basically the same as that of the example 2, except that chitosan is absent in the raw materials for preparing the novel water body pollution remediation agent.
Comparative example 5
The sewage treatment agent is prepared by the method in the Chinese patent application document 'a domestic sewage treatment agent (application number: ZL 201310670662.5)' in the embodiment 1.
Comparative example 6
The preparation method is basically the same as that of the example 2, except that 1 part of benzyltriethylammonium chloride, 6 parts of sodium dodecyl benzene sulfonate and 8 parts of chitosan are used as raw materials for preparing the novel water pollution restoration agent.
Comparative example 7
The preparation method is basically the same as that of the example 2, except that 10 parts of benzyltriethylammonium chloride, 1 part of sodium dodecyl benzene sulfonate and 7 parts of chitosan are used as raw materials for preparing the novel water pollution restoration agent.
Comparative example 8
The preparation method is basically the same as that of the example 2, except that 11 parts of benzyltriethylammonium chloride, 7 parts of sodium dodecyl benzene sulfonate and 1 part of chitosan are used as raw materials for preparing the novel water pollution restoration agent.
Industrial wastewater was collected, and the treatment agents of examples 1 to 3 and comparative examples 1 to 8 were subjected to sewage treatment remediation and examined according to national standard GB11901-1989, with the results shown in the following table.
From the above table, it can be seen that: (1) as can be seen from the data of examples 1 to 3 and comparative example 5, the SS (suspended matter), COD (chemical oxygen demand) and BOD (biochemical oxygen demand) values of the water pollution remediation agents prepared in examples 1 to 3 were significantly lower than those of the sewage treatment agent prepared in comparative example 5; meanwhile, as can be seen from the data of examples 1 to 3, example 2 is the most preferred example.
(2) As can be seen from the data of the example 2 and the comparative examples 1 to 4, the benzyltriethylammonium chloride, the sodium dodecyl benzene sulfonate and the chitosan play a synergistic role in preparing the water body pollution restoration agent, and the SS value, the COD value and the BOD value of the water body pollution restoration agent are synergistically reduced; this is:
chitosan has chelating and adsorbing effects on many substances, and its amino group and hydroxyl group adjacent to the amino group are associated with many metal ions (such as Hg)2+、Ni2+、Cu2+、Pb2+、Ca2+、Ag+Etc.) can form stable chelate so as to remove various harmful metal ions from water. Chitosan has a long-chain structure with many free-NH groups on the chain2The chitosan has lone pair electrons, makes amino weakly alkaline, and can combine a hydrogen proton from a solution, thereby making the chitosan become a polyelectrolyte with positive charges. The natural water body is an electronegative colloid system due to the existence of clay and bacteria, the chitosan can simultaneously play double roles of electric neutralization and coagulation and bonding and bridging, and coarse and fine particles in the water are coagulated into large flocs through electrostatic attraction and adsorption and then are settled, so that BOD, COD and SS in the water are reduced. The chitosan contains hydroxyl, amino, N-acetamido and other polar groups, can be subjected to hydrolysis, acetylation, hydroxymethylation, sulfonation, oxidation and other reactions, and can also be subjected to a crosslinking reaction under the action of bifunctional aldehyde or anhydride and other crosslinking agents. Benzyltriethylammonium chloride as a catalyst can catalyze alkylation reaction of chitosanThe preparation method comprises the following steps of; sodium dodecyl benzene sulfonate as anionic surfactant can modify the surface of chitosan to produce alkylation reaction in the presence of benzyltriethylammonium chloride, and the reaction activity of amino group is higher than that of hydroxyl group to produce alkylated N-chitosan derivative. The molecule of the N-chitosan alkylated derivative has a long-chain structure, and is lapped on two or more colloids or particles like a bridge and acts with the surfaces of the colloids or the particles by the active group of the molecule, so that the colloids and the particles are connected to form flocculation groups, fine particles in sewage are flocculated into larger floccules to adsorb and trap bubbles, and the floating of the particles is accelerated. In addition, after the polar group of the sodium dodecyl benzene sulfonate is adsorbed on the surface of the hydrophilic suspended particles, the non-polar group side faces to water, so that hydrophilic substances can be converted into hydrophobic substances, the sodium dodecyl benzene sulfonate is adhered to fine bubbles, the floating of the suspended particles is accelerated, and the suspended particles are adsorbed to reduce the SS value, the COD value and the BOD value in the water body.
(3) As can be seen from the data of comparative examples 6-8, the weight ratio of benzyltriethylammonium chloride, sodium dodecylbenzenesulfonate, chitosan is different from (4-8): (2-4): (3-5), the SS value, the COD value and the BOD value of the prepared water body pollution remediation agent are greatly different from those of the examples 1-3, are far larger than those of the examples 1-3, and are equivalent to those of the prior art (comparative example 5). The benzyl triethyl ammonium chloride, the sodium dodecyl benzene sulfonate and the chitosan are used as a reinforcing system, and the weight ratio of the benzyl triethyl ammonium chloride, the sodium dodecyl benzene sulfonate and the chitosan is (4-8): (2-4): (3-5) the flocculation, adsorption and other effects of chitosan are utilized in a reinforcing system; the alkylation catalysis of the benzyltriethylammonium chloride and the surface activity of the sodium dodecyl benzene sulfonate are utilized to carry out surface modification on the chitosan, and the characteristics of flocculation, adsorption and the like of the chitosan are promoted, so that the SS value, the COD value and the BOD value of the water pollution remediation agent are reduced by a reinforcement system consisting of the benzyltriethylammonium chloride, the sodium dodecyl benzene sulfonate and the chitosan in the water pollution remediation agent.
The above description should not be taken as limiting the invention to the embodiments, but rather, as will be apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which shall be deemed to fall within the scope of the invention as defined by the claims appended hereto.
Claims (9)
1. A novel water body pollution repairing agent is characterized by comprising the following components: polymeric ferric trichloride, polymeric aluminum trichloride, polyethyleneimine, bentonite, sodium chloride, lime, adsorbate, sodium carbonate, a pH regulator, trimethyl cyclopropane ammonium chloride, sodium polyacrylate, benzyl triethyl ammonium chloride, sodium dodecyl benzene sulfonate and chitosan;
the weight ratio of the benzyltriethylammonium chloride to the sodium dodecyl benzene sulfonate to the chitosan is (4-8): (2-4): (3-5).
2. The novel water body pollution remediation agent of claim 1, wherein the weight ratio of benzyltriethylammonium chloride, sodium dodecylbenzenesulfonate, chitosan is 6:3: 4.
3. The novel water body pollution restoration agent according to claim 1, wherein the adsorbate is activated carbon, zeolite, wood chips, diatomite in a weight ratio of 3: 1: 2: 3 in a mixture of two or more.
4. The novel water body pollution repairing agent according to claim 1, wherein the pH regulator is one of sodium hydroxide, potassium hydroxide or calcium hydroxide.
5. The novel water body pollution repairing agent according to claim 1, wherein the repairing agent comprises the following components in parts by weight: 20-25 parts of polyferric trichloride, 23-28 parts of polyaluminum trichloride, 12-16 parts of polyethyleneimine, 14-18 parts of bentonite, 8-12 parts of sodium chloride, 13-17 parts of lime, 6-9 parts of adsorbate, 4-10 parts of sodium carbonate, 4-8 parts of pH regulator, 10-14 parts of trimethyl cyclopropane ammonium chloride, 8-14 parts of sodium polyacrylate, 4-8 parts of benzyl triethyl ammonium chloride, 2-4 parts of sodium dodecyl benzene sulfonate and 3-5 parts of chitosan.
6. The preparation method of the novel water body pollution remediation agent according to any one of claims 1 to 5, comprising the following steps:
s1: crushing the adsorbate into powder, adding bentonite, sodium chloride, lime, sodium carbonate and a pH regulator according to parts by weight, mixing, and adding deionized water to prepare a mixture A;
s2: adding trimethyl cyclopropane ammonium chloride, sodium polyacrylate, benzyl triethyl ammonium chloride, sodium dodecyl benzene sulfonate and chitosan into the mixture A, stirring and uniformly mixing, and vibrating for 20-25min by ultrasonic waves to obtain a mixture B;
s3: and sequentially adding polyferric trichloride, polyaluminum trichloride and polyethyleneimine into the mixture B, uniformly stirring, stirring for 20-30min, adding deionized water, washing for 2-3 times, and drying to obtain the novel water body pollution repairing agent.
7. The method for preparing the novel water body pollution repairing agent according to claim 6, wherein the adsorbate in the step S1 is crushed into powder and then sieved through a 200-260 mesh sieve.
8. The preparation method of the novel water body pollution remediation agent of claim 6, wherein the polymeric ferric chloride, the polymeric aluminum chloride, and the polyethyleneimine are added at intervals of 6-8min in step S3, and stirring is performed while adding.
9. The method as claimed in claim 6, wherein the drying step S3 is performed at 110 ℃ and 100 ℃.
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