CN117486337A - Water treatment agent and preparation method thereof - Google Patents
Water treatment agent and preparation method thereof Download PDFInfo
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- CN117486337A CN117486337A CN202311730411.1A CN202311730411A CN117486337A CN 117486337 A CN117486337 A CN 117486337A CN 202311730411 A CN202311730411 A CN 202311730411A CN 117486337 A CN117486337 A CN 117486337A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title abstract description 23
- 239000011259 mixed solution Substances 0.000 claims abstract description 61
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000003756 stirring Methods 0.000 claims abstract description 47
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 43
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 20
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 18
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims abstract description 17
- 239000008367 deionised water Substances 0.000 claims abstract description 17
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 17
- 150000003863 ammonium salts Chemical group 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 13
- 229920000768 polyamine Polymers 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 3
- PZNOBXVHZYGUEX-UHFFFAOYSA-N n-prop-2-enylprop-2-en-1-amine;hydrochloride Chemical compound Cl.C=CCNCC=C PZNOBXVHZYGUEX-UHFFFAOYSA-N 0.000 claims description 31
- 229920002873 Polyethylenimine Polymers 0.000 claims description 27
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229920000289 Polyquaternium Polymers 0.000 claims description 8
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 4
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 4
- 238000005189 flocculation Methods 0.000 abstract description 35
- 230000016615 flocculation Effects 0.000 abstract description 33
- 230000000694 effects Effects 0.000 abstract description 29
- 239000010865 sewage Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 36
- 239000002351 wastewater Substances 0.000 description 34
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 16
- 230000002776 aggregation Effects 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 16
- 239000002244 precipitate Substances 0.000 description 15
- 238000005054 agglomeration Methods 0.000 description 14
- 239000000084 colloidal system Substances 0.000 description 14
- 239000003344 environmental pollutant Substances 0.000 description 14
- 231100000719 pollutant Toxicity 0.000 description 14
- 239000000243 solution Substances 0.000 description 11
- 244000005700 microbiome Species 0.000 description 10
- 235000019270 ammonium chloride Nutrition 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 7
- 238000009423 ventilation Methods 0.000 description 7
- 239000000356 contaminant Substances 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 239000008233 hard water Substances 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 6
- 238000013329 compounding Methods 0.000 description 5
- 239000008394 flocculating agent Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 4
- 230000005591 charge neutralization Effects 0.000 description 4
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 150000003242 quaternary ammonium salts Chemical group 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 125000002091 cationic group Chemical group 0.000 description 3
- 239000003093 cationic surfactant Substances 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 2
- 210000000170 cell membrane Anatomy 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000009285 membrane fouling Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- -1 suspended matter Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
- C02F1/5209—Regulation methods for flocculation or precipitation
-
- 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
-
- 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
- C02F1/542—Phosphorus compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The application relates to the field of sewage treatment, and in particular discloses a water treatment agent and a preparation method thereof. The water treatment agent comprises polyquaternary ammonium salt, inorganic polymeric flocculant, polyamine compound, sodium dodecyl sulfate, citric acid and deionized water; the preparation method comprises the following steps: putting the polyquaternary ammonium salt, the inorganic polymeric flocculant, the polyamine compound, the sodium dodecyl sulfate and the citric acid into a dry and clean container, mixing and stirring until the mixture is obtained, adding deionized water into the mixture, stirring to form a mixed solution, adding the nano ferroferric oxide into the mixed solution, carrying out ultrasonic vibration on the mixed solution, and continuously introducing carbon dioxide gas into the mixed solution in the ultrasonic vibration process to obtain the water treatment agent. The water treatment agent has the effect of solving the problem that the flocculation effect is poor in the existing flocculant.
Description
Technical Field
The application relates to the field of sewage treatment, in particular to a water treatment agent and a preparation method thereof.
Background
Water is an indispensable resource in life and industrial production, but various pollutants are often present in the water body due to the influence of human activities and natural factors. These contaminants include suspended particles, organics, heavy metal ions, etc., pose a serious threat to human health and the environment. Water treatment is therefore becoming critical to ensure that the water supplied to the person is safe and clean.
The water treatment agent refers to chemical substances for improving water quality and treating pollutants in water. In water treatment, a flocculant is a commonly used water treatment agent and plays an important role in removing suspended particles and soluble organic matters. Flocculants are a class of chemicals with high molecular weight that combine with one another to form larger clusters by changing the surface properties of fine suspensions and dissolved organics in water, thereby facilitating precipitation or filtration. The flocculant interacts with suspended particles or organic matters through charge adsorption, so that the surface charge of the flocculant is changed. This adsorption neutralizes the surface charge of the suspended matter, causing them to combine with each other to form flocks.
However, industrial wastewater such as desulfurization wastewater of a power plant contains various suspended matters, supersaturated sulfite, sulfate, heavy metals and the like, and the existing flocculant has poor effect, so that the treated wastewater still contains more suspended matters or soluble matters cannot be completely removed. And the amount of flocculant is also large, which increases the treatment cost and causes problems of generation and disposal of waste liquid. The addition of a large amount of flocculant may also place a burden on subsequent processing units, such as filter material clogging, membrane fouling, and the like.
Disclosure of Invention
In order to solve the problem of poor flocculation effect of the existing flocculant, the application provides a water treatment agent and a preparation method thereof.
On one hand, the water treatment agent provided by the application adopts the following technical scheme:
the water treatment agent comprises, by weight, 10-30 parts of polyquaternium, 10-30 parts of an inorganic polymeric flocculant, 10-20 parts of a polyamine compound, 1-10 parts of sodium dodecyl sulfate, 1-5 parts of citric acid and 30-60 parts of deionized water.
By adopting the technical scheme, the water treatment agent comprises a plurality of components, polyquaternium, inorganic polymeric flocculant, polyamine compound, sodium dodecyl sulfate, citric acid and deionized water. The combination has synergistic effect, enhances flocculation effect, can more effectively coagulate and precipitate suspended matters, sulfite, sulfate, heavy metal and other pollutants in the wastewater, and has better flocculation performance. Compared with the condition that a large amount of flocculating agent is required to be added, the water treatment agent has less usage amount which is only one tenth of the original usage amount, thereby reducing the treatment cost. The polyquaternary ammonium salt in the scheme can adsorb and neutralize suspended matters, colloid particles and the like in water, promote the suspended matters and the colloid particles to be rapidly aggregated to form flocculent precipitate, and accelerate sedimentation or floatation of the flocculent precipitate.
And the polyquaternary ammonium salt and the inorganic polymeric flocculant are compounded for use, so that flocculation can be enhanced, larger and heavier floccules are formed, and suspended matters and colloid particles are removed more effectively. The inorganic polymeric flocculant can cause excessive flocculation and agglomeration under high concentration, and the dispersibility is reduced. And the polyquaternary ammonium salt is used as a cationic surfactant and has good dispersing capability. The dispersion can be improved by being compounded with an inorganic polymeric flocculant, excessive flocculation and agglomeration are avoided, and a uniform dispersion state is maintained.
Optionally, the inorganic polymeric flocculant is one of polyaluminum chloride or polymeric ferric sulfate.
By adopting the technical scheme, the polyaluminium chloride and the polymeric ferric sulfate have strong flocculation capacity, and suspended matters, colloid particles, organic matters and the like can be effectively removed. Polyaluminium chloride or polyferric sulfate has a relatively fast flocculation speed, and flocculent precipitate can be rapidly formed. The compound use of the modified polyquaternium and the polyquaternium can further accelerate the flocculation speed, so that the floccules are quickly aggregated and settled, and the treatment time is shortened.
Optionally, the polyquaternary ammonium salt is polydimethyldiallyl ammonium chloride.
By adopting the technical scheme, the polydimethyldiallyl ammonium chloride has higher cationic charge density. This allows it to undergo charge neutralization reactions with negatively charged suspended matter and colloidal particles in the wastewater, forming larger and stable flocs. The polydimethyl diallyl ammonium chloride has good solubility and dispersibility in water and can be rapidly and uniformly dispersed in wastewater. This helps to increase the chance of contact with contaminants in the wastewater and enhance flocculation. The polydimethyl diallyl ammonium chloride has better hard water resistance. This means that it is able to maintain stable flocculation properties even in hard water environments and is not susceptible to water quality changes. And the polydimethyl diallyl ammonium chloride has good adaptability and can be used for treating different types of wastewater. It can exhibit good effects in treating wastewater containing pollutants such as suspended matters, organic matters, and colloids.
Optionally, the viscosity of the polydimethyldiallyl ammonium chloride is 800-4000cps.
By adopting the technical scheme, the polydimethyl diallyl ammonium chloride adopts the viscosity range of 800-4000cps, can provide enough adhesion and fluidity, and is favorable for forming large and stable floccules. This allows it to effectively agglomerate and precipitate contaminants such as suspended matter, colloids, and organics in the wastewater. Polydimethyldiallylammonium chloride in this viscosity range is easy to mix with other components and can be uniformly dispersed in the wastewater, which helps to enhance flocculation.
Optionally, the polyamine compound is polyethyleneimine.
By adopting the technical scheme, polyethyleneimine is subjected to adsorption reaction with suspended matters, organic matters, heavy metals and other pollutants in the wastewater, and agglomerates or precipitates are formed. This helps to remove contaminants from the wastewater and improves the treatment of the wastewater. The polyethyleneimine has good aggregation performance, and can promote aggregation and precipitation of tiny particulate matters in wastewater. Through interaction with pollutants in the wastewater, the wastewater can aggregate dispersed tiny particles into larger floccules, so that subsequent precipitation and filtration operations are facilitated.
Optionally, the viscosity of the polyethyleneimine is 700-3000cps.
By adopting the technical scheme, the polyethyleneimine with lower viscosity is easier to dissolve in water, and is stable under different water quality conditions, so that the flocculation process is accelerated.
Optionally, the water treatment agent also comprises 5-15 parts by weight of nano ferroferric oxide.
By adopting the technical scheme, the flocculation effect can be obviously enhanced by the compound use of the nano ferroferric oxide and the polydimethyldiallyl ammonium chloride. This is because the magnetic properties of nano ferroferric oxide can adsorb suspended particles and colloidal particles in water, while the quaternary ammonium salt groups of polydimethyldiallylammonium chloride can neutralize these particles to form large-particle flocs. The compound use can more effectively convert impurities and pollutants in water into large-particle flocculate, so that the large-particle flocculate is easier to filter and precipitate and remove. The nano ferroferric oxide and polydimethyl diallyl ammonium chloride can be used in a compounding way to synergistically kill bacteria and other microorganisms in water. The magnetism of the nano ferroferric oxide can adsorb microorganisms in water, and the quaternary ammonium salt group of the polydimethyl diallyl ammonium chloride can destroy cell membranes of the microorganisms, so that the microorganisms die. The compound use can improve the sterilization effect and reduce the number of bacteria and other microorganisms in water, thereby purifying the water quality more effectively.
On the other hand, the application also provides a preparation method of the water treatment agent, which adopts the following technical scheme:
a preparation method of a water treatment agent comprises the following steps:
s1, placing a polyquaternary ammonium salt, an inorganic polymeric flocculant, a polyamine compound, sodium dodecyl sulfate and citric acid into a dry and clean container, and uniformly mixing and stirring until a uniform mixture is obtained;
s2, adding deionized water into the mixture, stirring while adding water to form a mixed solution, heating the mixed solution to 40-60 ℃ and preserving heat;
and S3, adding nano ferroferric oxide into the mixed solution, carrying out ultrasonic vibration on the mixed solution, continuously introducing carbon dioxide gas into the mixed solution in the ultrasonic vibration process, and carrying out ultrasonic vibration for 10-30min to obtain the water treatment agent.
By adopting the technical scheme, cavitation phenomenon and microscale vortex flow generated by ultrasonic oscillation can generate severe turbulence and local high-pressure and low-pressure areas in the solution. When carbon dioxide gas is introduced, the effect of ultrasonic oscillation can be further enhanced, and the components in the solution are better mixed and dispersed. This helps to uniformly disperse nano ferroferric oxide and contact with other components, and improves the stability and effect of the water treatment agent. Also, the introduction of carbon dioxide gas causes a part of carbon dioxide in the solution to dissolve, and a carbonic acid solution is formed. These carbonate ions can complex with cations in the polymer, increasing its activity and stability.
In summary, the present application has the following beneficial effects:
1. because the water treatment agent comprises various components, such as polyquaternium, inorganic polymeric flocculant, polyamine compound, sodium dodecyl sulfate, citric acid and deionized water. The combination has synergistic effect, enhances flocculation effect, can more effectively coagulate and precipitate suspended matters, sulfite, sulfate, heavy metal and other pollutants in the wastewater, and has better flocculation performance. Compared with the condition that a large amount of flocculating agent is required to be added, the water treatment agent has less usage amount which is only one tenth of the original usage amount, thereby reducing the treatment cost. The polyquaternary ammonium salt in the scheme can adsorb and neutralize suspended matters, colloid particles and the like in water, promote the suspended matters and the colloid particles to be rapidly aggregated to form flocculent precipitate, and accelerate sedimentation or floatation of the flocculent precipitate. And the polyquaternary ammonium salt and the inorganic polymeric flocculant are compounded for use, so that flocculation can be enhanced, larger and heavier floccules are formed, and suspended matters and colloid particles are removed more effectively. The inorganic polymeric flocculant can cause excessive flocculation and agglomeration under high concentration, and the dispersibility is reduced. And the polyquaternary ammonium salt is used as a cationic surfactant and has good dispersing capability. The dispersion can be improved by being compounded with an inorganic polymeric flocculant, excessive flocculation and agglomeration are avoided, and a uniform dispersion state is maintained.
2. The use of polydimethyldiallylammonium chloride is preferred in this application as having a relatively high cationic charge density. This allows it to undergo charge neutralization reactions with negatively charged suspended matter and colloidal particles in the wastewater, forming larger and stable flocs. The polydimethyl diallyl ammonium chloride has good solubility and dispersibility in water and can be rapidly and uniformly dispersed in wastewater. This helps to increase the chance of contact with contaminants in the wastewater and enhance flocculation. The polydimethyl diallyl ammonium chloride has better hard water resistance. This means that it is able to maintain stable flocculation properties even in hard water environments and is not susceptible to water quality changes. And the polydimethyl diallyl ammonium chloride has good adaptability and can be used for treating different types of wastewater. It can exhibit good effects in treating wastewater containing pollutants such as suspended matters, organic matters, and colloids.
3. In the application, the compound use of the nano ferroferric oxide and the polydimethyldiallyl ammonium chloride is preferably adopted, so that the flocculation effect can be obviously enhanced. This is because the magnetic properties of nano ferroferric oxide can adsorb suspended particles and colloidal particles in water, while the quaternary ammonium salt groups of polydimethyldiallylammonium chloride can neutralize these particles to form large-particle flocs. The compound use can more effectively convert impurities and pollutants in water into large-particle flocculate, so that the large-particle flocculate is easier to filter and precipitate and remove. The nano ferroferric oxide and polydimethyl diallyl ammonium chloride can be used in a compounding way to synergistically kill bacteria and other microorganisms in water. The magnetism of the nano ferroferric oxide can adsorb microorganisms in water, and the quaternary ammonium salt group of the polydimethyl diallyl ammonium chloride can destroy cell membranes of the microorganisms, so that the microorganisms die. The compound use can improve the sterilization effect and reduce the number of bacteria and other microorganisms in water, thereby purifying the water quality more effectively.
4. According to the method, cavitation phenomenon and micro-scale vortex flow generated by ultrasonic oscillation can generate severe turbulence and local high-pressure and low-pressure areas in the solution. When carbon dioxide gas is introduced, the effect of ultrasonic oscillation can be further enhanced, and the components in the solution are better mixed and dispersed. This helps to uniformly disperse nano ferroferric oxide and contact with other components, and improves the stability and effect of the water treatment agent. Also, the introduction of carbon dioxide gas causes a part of carbon dioxide in the solution to dissolve, and a carbonic acid solution is formed. These carbonate ions can complex with cations in the polymer, increasing its activity and stability.
Detailed Description
The present application is described in further detail below with reference to examples.
Examples
Example 1
A preparation method of a water treatment agent comprises the following steps:
s1, placing 100g of polydimethyl diallyl ammonium chloride, 100g of polyaluminum chloride, 100g of polyethyleneimine, 10g of sodium dodecyl sulfate and 10g of citric acid into a dry and clean container, and stirring by using a stirring rod until a uniform mixture is obtained, and stopping stirring;
s2, adding 300g of deionized water into the mixture, stirring while adding water to form a mixed solution, heating the mixed solution to 50 ℃, preserving heat, and continuing stirring for 20min to ensure that all the components are fully mixed without obvious agglomeration or layering phenomenon;
s3, immersing the ultrasonic vibrator in the mixed solution, carrying out ultrasonic vibration on the mixed solution at the frequency of 40kHz, introducing carbon dioxide gas into the mixed solution through a hose in the ultrasonic vibration process, continuing the ultrasonic vibration for 20min, and stopping ventilation after the ultrasonic vibration is finished, so that the water treatment agent can be obtained.
Wherein, the viscosity of the polydimethyl diallyl ammonium chloride is 1200cps and the viscosity of the polyethyleneimine is 1600cps.
Example 2
A preparation method of a water treatment agent comprises the following steps:
s1, placing 300g of polydimethyl diallyl ammonium chloride, 200g of polyaluminum chloride, 200g of polyethyleneimine, 100g of sodium dodecyl sulfate and 50g of citric acid into a dry and clean container, and stirring by using a stirring rod until a uniform mixture is obtained, and stopping stirring;
s2, adding 600g of deionized water into the mixture, stirring while adding water to form a mixed solution, heating the mixed solution to 50 ℃, preserving heat, and continuing stirring for 20min to ensure that all the components are fully mixed without obvious agglomeration or layering phenomenon;
s3, immersing the ultrasonic vibrator in the mixed solution, carrying out ultrasonic vibration on the mixed solution at the frequency of 40kHz, introducing carbon dioxide gas into the mixed solution through a hose in the ultrasonic vibration process, continuing the ultrasonic vibration for 20min, and stopping ventilation after the ultrasonic vibration is finished, so that the water treatment agent can be obtained.
Wherein, the viscosity of the polydimethyl diallyl ammonium chloride is 1200cps and the viscosity of the polyethyleneimine is 1600cps.
Example 3
A preparation method of a water treatment agent comprises the following steps:
s1, placing 250g of polydimethyl diallyl ammonium chloride, 150g of polyaluminum chloride, 120g of polyethyleneimine, 60g of sodium dodecyl sulfate and 30g of citric acid into a dry and clean container, stirring by using a stirring rod until a uniform mixture is obtained, and stopping stirring;
s2, adding 500g of deionized water into the mixture, stirring while adding water to form a mixed solution, heating the mixed solution to 50 ℃, preserving heat, and continuing stirring for 20min to ensure that all the components are fully mixed without obvious agglomeration or layering phenomenon;
s3, immersing the ultrasonic vibrator in the mixed solution, carrying out ultrasonic vibration on the mixed solution at the frequency of 40kHz, introducing carbon dioxide gas into the mixed solution through a hose in the ultrasonic vibration process, continuing the ultrasonic vibration for 20min, and stopping ventilation after the ultrasonic vibration is finished, so that the water treatment agent can be obtained.
Wherein, the viscosity of the polydimethyl diallyl ammonium chloride is 1200cps and the viscosity of the polyethyleneimine is 1600cps.
Example 4
A preparation method of a water treatment agent comprises the following steps:
s1, placing 250g of polydimethyl diallyl ammonium chloride, 150g of polyaluminum chloride, 120g of polyethyleneimine, 60g of sodium dodecyl sulfate and 30g of citric acid into a dry and clean container, stirring by using a stirring rod until a uniform mixture is obtained, and stopping stirring;
s2, adding 500g of deionized water into the mixture, stirring while adding water to form a mixed solution, heating the mixed solution to 50 ℃, preserving heat, and continuing stirring for 20min to ensure that all the components are fully mixed without obvious agglomeration or layering phenomenon;
and S3, adding 120g of nano ferroferric oxide into the mixed solution, immersing an ultrasonic vibrator into the mixed solution, carrying out ultrasonic vibration on the mixed solution at a frequency of 40kHz, introducing carbon dioxide gas into the mixed solution through a hose in the ultrasonic vibration process, continuing the ultrasonic vibration for 20min, and stopping ventilation after the ultrasonic vibration is finished, thus obtaining the water treatment agent.
Wherein, the viscosity of the polydimethyl diallyl ammonium chloride is 1200cps, the viscosity of the polyethyleneimine is 1600cps, and the particle size of the nano ferroferric oxide is 50-100 nm.
Example 5
The preparation method of the water treatment agent is different from that of the embodiment 4 in that: in the step S3, 50g of nano ferroferric oxide is added into the mixed solution.
Example 6
The preparation method of the water treatment agent is different from that of the embodiment 4 in that: in the step S3, 150g of nano ferroferric oxide is added into the mixed solution.
Example 7
The preparation method of the water treatment agent is different from that of the embodiment 4 in that: the polyaluminum chloride in the step S1 is replaced by polymeric ferric sulfate.
Example 8
The preparation method of the water treatment agent is different from that of the embodiment 4 in that: the viscosity of polydimethyldiallylammonium chloride was 800cps.
Example 9
The preparation method of the water treatment agent is different from that of the embodiment 4 in that: the viscosity of the polydimethyldiallyl ammonium chloride was 4000cps.
Example 10
The preparation method of the water treatment agent is different from that of the embodiment 4 in that: the viscosity of the polyethyleneimine was 700cps.
Example 11
The preparation method of the water treatment agent is different from that of the embodiment 4 in that: the viscosity of the polyethyleneimine was 3000cps.
Comparative example
Comparative example 1
A preparation method of a water treatment agent comprises the following steps:
s1, placing 250g of tripolyphosphate, 150g of polyaluminum chloride, 120g of polyethyleneimine, 60g of sodium dodecyl sulfate and 30g of citric acid into a dry and clean container, stirring by using a stirring rod until a uniform mixture is obtained, and stopping stirring;
s2, adding 500g of deionized water into the mixture, stirring while adding water to form a mixed solution, heating the mixed solution to 50 ℃, preserving heat, and continuing stirring for 20min to ensure that all the components are fully mixed without obvious agglomeration or layering phenomenon;
and S3, adding 120g of nano ferroferric oxide into the mixed solution, immersing an ultrasonic vibrator into the mixed solution, carrying out ultrasonic vibration on the mixed solution at a frequency of 40kHz, introducing carbon dioxide gas into the mixed solution through a hose in the ultrasonic vibration process, continuing the ultrasonic vibration for 20min, and stopping ventilation after the ultrasonic vibration is finished, thus obtaining the water treatment agent.
Wherein the viscosity of the polyethyleneimine is 1600cps, and the particle size of the nano ferroferric oxide is 50-100 nm.
Comparative example 2
A preparation method of a water treatment agent comprises the following steps:
s1, placing 250g of polydimethyl diallyl ammonium chloride, 120g of polyethyleneimine, 60g of sodium dodecyl sulfate and 30g of citric acid into a dry and clean container, stirring by using a stirring rod until a uniform mixture is obtained, and stopping stirring;
s2, adding 500g of deionized water into the mixture, stirring while adding water to form a mixed solution, heating the mixed solution to 50 ℃, preserving heat, and continuing stirring for 20min to ensure that all the components are fully mixed without obvious agglomeration or layering phenomenon;
and S3, adding 120g of nano ferroferric oxide into the mixed solution, immersing an ultrasonic vibrator into the mixed solution, carrying out ultrasonic vibration on the mixed solution at a frequency of 40kHz, introducing carbon dioxide gas into the mixed solution through a hose in the ultrasonic vibration process, continuing the ultrasonic vibration for 20min, and stopping ventilation after the ultrasonic vibration is finished, thus obtaining the water treatment agent.
Wherein the viscosity of the polydimethyl diallyl ammonium chloride is 1200cps, and the particle size of the nano ferroferric oxide is 50-100 nm.
Comparative example 3
A preparation method of a water treatment agent comprises the following steps:
s1, placing 250g of polydimethyl diallyl ammonium chloride, 150g of polyaluminum chloride, 120g of polyethyleneimine and 60g of sodium dodecyl sulfate into a dry and clean container, stirring by using a stirring rod until a uniform mixture is obtained, and stopping stirring;
s2, adding 500g of deionized water into the mixture, stirring while adding water to form a mixed solution, heating the mixed solution to 50 ℃, preserving heat, and continuing stirring for 20min to ensure that all the components are fully mixed without obvious agglomeration or layering phenomenon;
and S3, adding 120g of nano ferroferric oxide into the mixed solution, immersing an ultrasonic vibrator into the mixed solution, carrying out ultrasonic vibration on the mixed solution at a frequency of 40kHz, introducing carbon dioxide gas into the mixed solution through a hose in the ultrasonic vibration process, continuing the ultrasonic vibration for 20min, and stopping ventilation after the ultrasonic vibration is finished, thus obtaining the water treatment agent.
Wherein, the viscosity of the polydimethyl diallyl ammonium chloride is 1200cps, the viscosity of the polyethyleneimine is 1600cps, and the particle size of the nano ferroferric oxide is 50-100 nm.
Comparative example 4
A preparation method of a water treatment agent comprises the following steps:
s1, placing 250g of polydimethyl diallyl ammonium chloride, 150g of polyaluminum chloride, 120g of polyethyleneimine, 60g of sodium dodecyl sulfate and 30g of citric acid into a dry and clean container, stirring by using a stirring rod until a uniform mixture is obtained, and stopping stirring;
s2, adding 500g of deionized water into the mixture, stirring while adding water to form a mixed solution, heating the mixed solution to 50 ℃, preserving heat, and continuing stirring for 20min to ensure that all the components are fully mixed without obvious agglomeration or layering phenomenon;
and S3, adding 120g of nano ferroferric oxide into the mixed solution, immersing an ultrasonic vibrator into the mixed solution, and carrying out ultrasonic vibration on the mixed solution at a frequency of 40kHz for 20min to obtain the water treatment agent.
Wherein, the viscosity of the polydimethyl diallyl ammonium chloride is 1200cps, the viscosity of the polyethyleneimine is 1600cps, and the particle size of the nano ferroferric oxide is 50-100 nm.
Performance test
Detection method
According to GB18918-2002 "pollutant emission Standard of urban wastewater treatment plant", the wastewater uses desulfurization wastewater from Power plant, and the quality of desulfurization wastewater is: the pH value is 6.28, the COD is 263mg/L, and the SS is 186mg/L. In examples 1 to 11 and comparative examples 1 to 4, 500ml of each of the water treatment agent was added to 10L of desulfurization waste water at room temperature, stirred uniformly by a stirring rod, left to stand for 24 hours, then sampled and detected, COD and SS contents were measured, and the sampling and measurement methods were carried out in accordance with the regulations in GB18918-2002, and the COD value was measured and the state of the floc was observed.
TABLE 1 statistics of measurements for examples 1-11 and comparative examples 1-4
As can be seen in combination with example 4 and comparative example 1 and with table 1, polydimethyldiallylammonium chloride has a higher cationic charge density. This allows it to undergo charge neutralization reactions with negatively charged suspended matter and colloidal particles in the wastewater, forming larger and stable flocs. The polydimethyl diallyl ammonium chloride has good solubility and dispersibility in water and can be rapidly and uniformly dispersed in wastewater. This helps to increase the chance of contact with contaminants in the wastewater and enhance flocculation. The polydimethyl diallyl ammonium chloride has better hard water resistance. This means that it is able to maintain stable flocculation properties even in hard water environments and is not susceptible to water quality changes. And the polydimethyl diallyl ammonium chloride has good adaptability and can be used for treating different types of wastewater. It can exhibit good effects in treating wastewater containing pollutants such as suspended matters, organic matters, and colloids.
As can be seen from the combination of example 4 and comparative example 2 and the combination of Table 1, comparative example 2 was free of added polyaluminum chloride, and compared with the combination test results of example 3, flocculation can be enhanced by compounding the polyquaternium with an inorganic polymeric flocculant to form larger and heavier flocculants, thereby removing suspended matters and colloidal particles more effectively. The inorganic polymeric flocculant can cause excessive flocculation and agglomeration under high concentration, and the dispersibility is reduced. And the polyquaternary ammonium salt is used as a cationic surfactant and has good dispersing capability. The dispersion can be improved by being compounded with an inorganic polymeric flocculant, excessive flocculation and agglomeration are avoided, and a uniform dispersion state is maintained.
As can be seen from the combination of example 4 and comparative example 3 and the combination of table 1, comparative example 3 is different from example 4 in that citric acid is not added to comparative example 3, and it can be seen from the test results that the treatment efficiency of the flocculant can be improved by compounding the polydimethyldiallyl ammonium chloride and the citric acid. The citric acid has certain chelating capacity, and can form a complex with metal ions in the wastewater, so that the complex is easier to remove. This can further improve the purification effect of the wastewater. .
As can be seen from the combination of example 4 and comparative example 4 and the combination of table 1, the difference between example 4 and comparative example 4 is that the comparative example 4 does not introduce carbon dioxide gas into the mixed solution during ultrasonic vibration, and the combination test result shows that the effect of ultrasonic vibration is further enhanced when carbon dioxide gas is introduced, so that the components in the solution are better mixed and dispersed. This helps to uniformly disperse nano ferroferric oxide and contact with other components, and improves the stability and effect of the water treatment agent. Also, the introduction of carbon dioxide gas causes a part of carbon dioxide in the solution to dissolve, and a carbonic acid solution is formed. These carbonate ions can complex with cations in the polymer, increasing its activity and stability.
It can be seen in combination with examples 1-3 and with Table 1 that the polyquaternium, inorganic polymeric flocculant, polyamine compound, sodium dodecyl sulfate, citric acid and deionized water. The combination has synergistic effect, enhances flocculation effect, can more effectively coagulate and precipitate suspended matters, sulfite, sulfate, heavy metal and other pollutants in the wastewater, and has better flocculation performance. Compared with the condition that a large amount of flocculating agent is required to be added, the water treatment agent has less usage amount which is only one tenth of the original usage amount, thereby reducing the treatment cost. The polyquaternary ammonium salt in the scheme can adsorb and neutralize suspended matters, colloid particles and the like in water, promote the suspended matters and the colloid particles to be rapidly aggregated to form flocculent precipitate, and accelerate sedimentation or floatation of the flocculent precipitate.
It can be seen from the combination of examples 3 to 4 and the combination of table 1 that the adsorption capacity is further enhanced and the pollutant removal efficiency is improved after the nano ferroferric oxide is added and the nano ferroferric oxide is compounded with the polydimethyldiallyl ammonium chloride. Polydimethyl diallyl ammonium chloride is used as flocculant to combine suspended matter and particles into flocculate through charge neutralization and adsorption. The addition of the nano ferroferric oxide provides an additional bridging effect, and enhances the formation and stability of flocculate, thereby further improving flocculation effect.
It can be seen from the combination of examples 4 to 6 and the combination of Table 1 that the flocculation ability of the water treatment agent can be better enhanced by adjusting the addition amount of nano ferroferric oxide.
It can be seen from the combination of example 4 and example 7 and the combination of table 1 that polyaluminum chloride and polyferric sulfate have strong flocculation ability and can effectively remove suspended matters, colloid particles, organic matters and the like. Polyaluminium chloride or polyferric sulfate has a relatively fast flocculation speed, and flocculent precipitate can be rapidly formed. Wherein, the effect of compounding the polyaluminum chloride and the polyquaternary ammonium salt is better.
It can be seen from the combination of examples 4 and 8-11 and Table 1 that the viscosity of the polyethyleneimine and polydimethyldiallylammonium chloride affects the effect of the polyethyleneimine and polydimethyldiallylammonium chloride in the water treatment agent, and the lower viscosity polydimethyldiallylammonium chloride reacts more easily with suspended substances and dirt in the water to form flocculates, and the lower viscosity polyethyleneimine is more easily dissolved in the water, and remains stable under different water quality conditions, thereby accelerating the flocculation process.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (8)
1. The water treatment agent is characterized by comprising, by weight, 10-30 parts of polyquaternium, 10-30 parts of an inorganic polymeric flocculant, 10-20 parts of a polyamine compound, 1-10 parts of sodium dodecyl sulfate, 1-5 parts of citric acid and 30-60 parts of deionized water.
2. The water treatment agent according to claim 1, wherein: the inorganic polymeric flocculant is one of polyaluminum chloride or polymeric ferric sulfate.
3. The water treatment agent according to claim 1, wherein: the polyquaternary ammonium salt is polydimethyl diallyl ammonium chloride.
4. A water treatment agent according to claim 3, wherein: the viscosity of the polydimethyl diallyl ammonium chloride is 800-4000cps.
5. The water treatment agent according to claim 1, wherein: the polyamine compound is polyethyleneimine.
6. The water treatment agent according to claim 5, wherein: the viscosity of the polyethyleneimine is 700-3000cps.
7. The water treatment agent according to claim 1, wherein: the water treatment agent also comprises 5-15 parts by weight of nano ferroferric oxide.
8. A method of preparing the water treatment agent according to any one of claims 1 to 7, wherein: the method comprises the following steps:
s1, placing a polyquaternary ammonium salt, an inorganic polymeric flocculant, a polyamine compound, sodium dodecyl sulfate and citric acid into a dry and clean container, and uniformly mixing and stirring until a uniform mixture is obtained;
s2, adding deionized water into the mixture, stirring while adding water to form a mixed solution, heating the mixed solution to 40-60 ℃ and preserving heat;
and S3, adding nano ferroferric oxide into the mixed solution, carrying out ultrasonic vibration on the mixed solution, continuously introducing carbon dioxide gas into the mixed solution in the ultrasonic vibration process, and carrying out ultrasonic vibration for 10-30min to obtain the water treatment agent.
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| JPH09290299A (en) * | 1996-04-26 | 1997-11-11 | Electric Power Dev Co Ltd | Treatment of waste water from thermal electric power plant |
| JP2014073473A (en) * | 2012-10-05 | 2014-04-24 | Kurita Water Ind Ltd | Method of treating desulfurization waste water |
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