CN111642128B - Preparation method of multifunctional composite water body purification material - Google Patents
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Abstract
A preparation method of a multifunctional composite water body purification material comprises the following steps: 1) mixing natural zeolite powder with Na2O2Grinding the powders together; 2) adding Ti (OH) into the mixture in the step 1) in sequence4Suspension and Ca (OH)2Continuously grinding the suspension; 3) then adding Al (OH) into the mixture in the step 2)3Continuously grinding the suspension; 4) heating and refluxing the slurry obtained in the step 3) to obtain a primary material; and 5) drying the primary material obtained in the step 4) at 70-80 ℃ to obtain the final composite water body purification material. The preparation method has simple process and mild reaction conditions, and is suitable for large-scale industrial production. The prepared composite water body purification material has the characteristics of multiple functions, is environment-friendly, and cannot cause the problem of secondary pollution.
Description
Technical Field
The invention belongs to the field of materials, and particularly relates to a preparation method of a multifunctional composite water purification material.
Background
With the increasing discharge of sewage in human life and industry, water pollution is an increasingly prominent problem in environmental pollution. In particular to a plurality of problems that domestic wastewater and the like are directly discharged into environmental water without treatment, and natural water eutrophication and the like are directly caused.
At present, various water body purification methods exist, for example, a biological method, and a patent publication No. CN10629768A discloses a composite basalt fiber purification material prepared by using composite basalt fiber as a carrier and loading water body purification microorganisms. The material utilizes microorganisms to decompose organic substances in the water body, thereby reducing the eutrophication of the water body and achieving the aim of purifying the water quality. However, the problem is that the microorganism has certain requirements on environmental conditions, such as toxic final metal ions, water pH value, etc., thereby limiting the applicable scope.
For example, an inorganic water purification material, CN102247811B discloses a preparation method of a natural volcanic cinders-sodium alginate composite microsphere water purification material. The water body purification material is prepared by taking natural volcanic cinders as a carrier and loading sodium alginate. But has the problem that the function is single, and the device is not suitable for treating various water pollutants.
Therefore, there is still a need to develop a water purification material with wider application and simple and easy preparation method and a preparation method thereof.
Disclosure of Invention
In view of the problems of the prior art, according to one aspect of the present invention, it is an object of the present invention to provide a method for preparing a multifunctional composite water purifying material, the method comprising the following steps:
1) sieving natural zeolite powder with 100 mesh sieve to remove large particle size particles, and adding Na2O2Adding the powder into a planetary ball mill together to be ground for 30 minutes;
2) adding Ti (OH) into the mixture in the step 1) in sequence4Suspension and Ca (OH)2Continuously grinding the suspension for 1-3 hours;
3) then adding Al (OH) into the mixture in the step 2)3Continuously grinding the suspension for 1-3 hours to form 200-mesh slurry;
4) heating and refluxing the slurry obtained in the step 3) for 4-8 hours to obtain a preliminary material of a zeolite-loaded active alumina, nano titanium oxide and calcium peroxide compound;
5) drying the primary material obtained in the step 4) at 70-80 ℃ for 8-12 hours to obtain the final composite water body purifying material.
Preferably, the Na in step 1) is based on 100 parts by weight of natural zeolite powder2O2The amount of the powder added is 4 to 25 parts by weight, more preferably 6 to 20 parts by weight, and further preferably 8 to 15 parts by weight.
Preferably, in step 2), Ti (OH)4The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 5:100 to 50:100, preferably 8:100 to 35:100, more preferably 10:100 to 25: 100.
Preferably, in step 2), Ti (OH)4The concentration of the suspension is 0.8g/mL to 1.2 g/mL.
Preferably, Ca (OH) in step 2)2Is added in a weight ratio of 5:100 to 40:100, preferably 10:100 to 35:100, more preferably 15:100 to 20:100 to the natural zeolite powder.
Preferably, Ca (OH) in step 2)2The concentration of the suspension is 0.5g/mL to 0.8 g/mL.
Preferably, Al (OH) in step 3)3The weight ratio of the added amount of (A) to the natural zeolite powder is 5:100 to 30:100, preferably 5:100 to 20:100, more preferably 5:100 to 15: 100.
Preferably, Al (OH) in step 3)3The concentration of the suspension is 1.6g/mL to 2.0 g/mL.
According to another aspect of the invention, an object of the invention is to provide a multifunctional composite water body purification material prepared by the above preparation method.
According to another aspect of the invention, the invention aims to provide the application of the multifunctional composite water body purification material in purifying environmental water bodies.
Advantageous effects
The preparation method provided by the invention is simple in process, mild in reaction conditions and suitable for large-scale industrial production. The prepared composite water body purification material has the characteristics of multiple functions, is environment-friendly, and cannot cause the problem of secondary pollution.
Drawings
FIG. 1 and FIG. 2 show the respective steps of step 1) of example 1, in which Na is passed2O2Scanning electron microscope results of the zeolite powder after powder modification prove that the obtained modified zeolite powder is polydisperse particles below 5 um.
Fig. 3 shows the diffraction results of the polycrystalline powder of the modified zeolite powder obtained in step 1) of example 1, and confirms that the obtained modified zeolite powder is a molecular sieve with a crystalline silica-alumina structure.
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description is made, it should be understood that the terms used in the present specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention, so it should be understood that other equivalents and modifications could be made thereto without departing from the spirit and scope of the invention.
The preparation method of the multifunctional composite water body purification material comprises the following steps:
1) sieving natural zeolite powder with 100 mesh sieve to remove large particle size particles, and adding Na2O2Adding the powder into a planetary ball mill together to be ground for 30 minutes;
2) adding Ti (OH) into the mixture in the step 1) in sequence4Suspension and Ca (OH)2Continuously grinding the suspension for 1-3 hours;
3) then adding Al (OH) into the mixture in the step 2)3Continuously grinding the suspension for 1-3 hours to form 200-mesh slurry;
4) heating and refluxing the slurry obtained in the step 3) for 4-8 hours to obtain a preliminary material of a zeolite-loaded active alumina, nano titanium oxide and calcium peroxide compound;
5) drying the primary material obtained in the step 4) at 70-80 ℃ for 8-12 hours to obtain the final composite water body purifying material.
Preferably, the Na in step 1) is based on 100 parts by weight of natural zeolite powder2O2The amount of the powder added is 4 to 25 parts by weight, more preferably 6 to 20 parts by weight, and further preferably 8 to 15 parts by weight.
The Na is2O2Use as modifier of Na+Can easily enter into the pore diameter of the zeolite and Ca in the zeolite2+、Mg2+The plasma undergoes ion exchange due to Na+Radius less than Ca2+、Mg2+Plasma, so that it passes through Ca2+、Mg2+The ion exchange of the isocationic ions leads the internal pore channels of the zeolite to be enlarged and the steric hindrance to be reduced, and meanwhile, Na+Easy to neutralize NH in solution4 +Ion exchange is carried out, and the removal rate of ammonia nitrogen by the sodium chloride modified zeolite is greatly increased due to the reasons. While Na2O2With subsequent addition of Ti (OH)4Suspension, Ca (OH)2Suspension and Al (OH)3Reacting water contained in the suspension to generate hydrogen peroxide, and reacting the generated hydrogen peroxide with Ti (OH)4And Ca (OH)2The reaction produces a peroxide.
Based on 100 parts by weight of natural zeolite powder, when the Na is2O2When the amount of the powder added is less than 4 parts by weight, Na2O2The dosage is insufficient, and the subsequent generation of titanium peroxide and calcium peroxide is difficult; when the Na is present2O2When the amount of the powder added is more than 25 parts by weight, Na2O2Excessive hydrogen peroxide is generated in a system in the subsequent step, except titanium peroxide and calcium peroxide, Al ions are easy to flocculate in advance and attach to the surface of the zeolite, so that the reaction of the titanium peroxide and the calcium peroxide in a water body is blocked, and the product performance is reduced.
Preferably, in the preparation method according to the present invention, Ti (OH) in the step 2)4Is added in a weight ratio of 5:100 to 50:100, preferably 8:100 to 35:100, more preferably 10:100 to 25:100, to the natural zeolite powder, and the Ti (OH)4The concentration of the suspension is 0.8g/mL to 1.2 g/mL. Ca (OH)2The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 5:100 to 40:100, preferably 10:100 to 35:100, more preferably 15:100 to 20: 100; and Ca (OH)2The concentration of the suspension is 0.5g/mL to 0.8 g/mL.
Ti (OH) added in step 2)4Suspension and Ca (OH)2Water and Na in the suspension2O2The peroxide is generated by reaction, the peroxide radical is combined with titanium to generate titanium peroxide, and the titanium peroxide is crystallized into TiO by subsequent heat treatment2Thus providing good photocatalysis to the productThe activity is that the peroxide radical is combined with calcium to generate calcium peroxide which can slowly release oxygen in the sludge and promote the survival of aerobic bacteria.
Ti(OH)4The weight ratio of the added amount of the natural zeolite powder is 5:100 to 50:100, when the weight ratio is less than 5:100, namely Ti (OH)4If the amount of (A) is not sufficient, the photocatalytic performance of the subsequent product is not satisfactory, and if the weight ratio is more than 50:100, that is, Ti (OH)4If the amount of the titanium ions and the Ca ions is excessive, the Ti ions and the Ca ions compete for peroxide, and the photocatalytic performance and the performance of slow-release oxygen of the product are difficult to achieve reasonable balance.
Further, the above-mentioned Ti (OH)4The concentration of the suspension is 0.8g/mL to 1.2g/mL and the Ca (OH)2The concentration of the suspension is 0.5g/mL to 0.8 g/mL. Due to Ti (OH)4Suspension and Ca (OH)2Suspension and subsequent addition of Al (OH)3The water in the suspension is mixed with Na2O2The reaction, and therefore its concentration, needs to be accurately controlled so that the hydrogen peroxide produced is controlled within a reasonable range.
Ca(OH)2The weight ratio of the added amount of the calcium peroxide to the natural zeolite powder is 5:100 to 40:100, and when the weight ratio is not in the range, the generation of calcium peroxide is difficult, and the slow-release oxygen performance of the product is poor.
Preferably, in the preparation method according to the present invention, Al (OH) in step 3)3Is added in a weight ratio of 5:100 to 30:100, preferably 5:100 to 20:100, more preferably 5:100 to 15:100, and Al (OH)3The concentration of the suspension is 1.6g/mL to 2.0 g/mL. The preparation method of the invention adds Al (OH)3For the purpose of utilizing Al (OH)3Flocculation property of when Al (OH) is added3Amount of (2) and Al (OH)3When the concentration of the suspension is within the above range, the flocculation effect of the product is the best if Al (OH)3Excessive, which results in poor photocatalytic and slow release oxygen properties.
In the preparation process according to the invention, first Ti (OH) is added after step 1)4Suspension and Ca (OH)2Suspending the solution to generate titanium peroxide and calcium peroxide on the mesoporous and surface of the zeolite, and adding Al (OH)3Suspending the solution to make the generated activated alumina mainly attached on the surface of the zeolite and not deeply enter the mesoporous of the zeolite.
In the preparation method according to the present invention, the drying is performed at 70-80 ℃ in step 5), if the drying temperature is too high, the crystallinity of the alumina produced is too high to be active, and if the drying temperature is too low, the alumina is not sufficiently produced, and the product is easily mildewed during storage.
The following examples are given by way of illustration of embodiments of the invention and are not to be construed as limiting the invention, and it will be understood by those skilled in the art that modifications may be made without departing from the spirit and scope of the invention. Unless otherwise specified, reagents and equipment used in the following examples are commercially available products.
Example 1
1) Sieving with 100 mesh sieve to remove large particle size particles, 100g natural zeolite powder and 12g Na2O2Adding the powder into a planetary ball mill together to be ground for 30 minutes;
2) adding Ti (OH) with the concentration of 0.8g/mL into the mixture in the step 1) in sequence4Suspension and Ca (OH) at a concentration of 0.5g/mL2Grinding the suspension for 1-3 hr, wherein the grinding time is Ti (OH)4The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 20:100, Ca (OH)2The weight ratio of the added amount of the zeolite to the natural zeolite powder is 15: 100;
3) then, Al (OH) was added to the mixture in step 2) at a concentration of 1.8g/mL3Grinding the suspension for 1-3 hr to obtain 200 mesh slurry, Al (OH)3The weight ratio of the added amount of the zeolite to the natural zeolite powder is 15: 100;
4) heating and refluxing the slurry obtained in the step 3) for 5 hours to obtain a preliminary material of a zeolite-loaded activated alumina, nano titanium oxide and calcium peroxide compound;
5) drying the primary material obtained in the step 4) at 70-80 ℃ for 8-12 hours to obtain the final composite water body purifying material.
Example 2
Except that in step 2) Ti (OH)4The weight ratio of the added amount of the (B) to the natural zeolite powder is adjusted to 10:100, Ca (OH)2Except that the weight ratio of the amount of the added to the natural zeolite powder was 20:100, a composite water purification material was prepared in the same manner as in example 1.
Example 3
Except that in step 2) Ti (OH)4The weight ratio of the added amount of the (B) to the natural zeolite powder is adjusted to be 25:100, Ca (OH)2Except that the weight ratio of the amount of the added to the natural zeolite powder was 20:100, a composite water purification material was prepared in the same manner as in example 1.
Example 4
Except for Al (OH) in step 3)3The composite water purification material was prepared in the same manner as in example 1, except that the weight ratio of the amount of the added (c) to the natural zeolite powder was adjusted to 5: 100.
Example 5
Except for Al (OH) in step 3)3The composite water purification material was prepared in the same manner as in example 1, except that the weight ratio of the amount of the added (c) to the natural zeolite powder was adjusted to 10: 100.
Comparative example 1
Except for Na in step 1)2O2A composite water purification material was prepared in the same manner as in example 1, except that the amount of the powder added was adjusted to 3 g.
Comparative example 2
Except for Na in step 1)2O2A composite water purification material was prepared in the same manner as in example 1, except that the amount of the powder added was adjusted to 35 g.
Comparative example 3
Except that in step 2) Ti (OH)4The composite water purification material was prepared in the same manner as in example 1, except that the weight ratio of the amount of the added natural zeolite powder was adjusted to 75: 100.
Comparative example 4
Except that in step 2) Ca (OH)2The composite water purification material was prepared in the same manner as in example 1, except that the weight ratio of the amount of the added (c) to the natural zeolite powder was adjusted to 40: 100.
Comparative example 5
Except for Al (OH) in step 3)3The composite water purification material was prepared in the same manner as in example 1, except that the weight ratio of the amount of the added (c) to the natural zeolite powder was adjusted to 50: 100.
Comparative example 6
1) Sieving with 100 mesh sieve to remove large particle size particles, 100g natural zeolite powder and 5.23g H2O2(with 12g of Na)2O2About equimolar amounts of the powders) were added together in a planetary ball mill, followed by addition of Ti (OH) in a concentration of 0.8g/mL4Suspension and Ca (OH) at a concentration of 0.5g/mL2Grinding the suspension for 1-3 hr, wherein the grinding time is Ti (OH)4The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 20:100, Ca (OH)2The weight ratio of the added amount of the zeolite to the natural zeolite powder is 15: 100;
2) then, Al (OH) was added to the mixture in step 1) at a concentration of 1.8g/mL3Grinding the suspension for 1-3 hr to obtain 200 mesh slurry, Al (OH)3The weight ratio of the added amount of the zeolite to the natural zeolite powder is 15: 100;
3) heating and refluxing the slurry obtained in the step 2) for 5 hours to obtain a preliminary material of a zeolite-loaded activated alumina, nano titanium oxide and calcium peroxide compound;
4) drying the primary material obtained in the step 3) at 70-80 ℃ for 8-12 hours to obtain the final composite water body purifying material.
Comparative example 7
Except that in step 2) Ti (OH)4Suspension, Ca (OH)2Suspension and Al (OH)3A composite water purification material was prepared in the same manner as in example 1, except that the suspensions were added together.
Comparative example 8
A composite water purifying material was prepared in the same manner as in example 1, except that the drying temperature in step 5) was set to 160 ℃.
Experimental example 1
The ammonia nitrogen wastewater mainly comes from chemical fertilizers, coking, petrifaction, pharmacy, foods, refuse landfills and the like, and a large amount of ammonia nitrogen wastewater is discharged into a water body, so that the eutrophication of the water body is caused, the black and odorous water body is caused, the difficulty and the cost of water supply treatment are increased, and even toxic action is generated on crowds and organisms. 1g of the composite water purification materials prepared in the untreated zeolite (comparative example), examples 1 to 5 and comparative examples 1 to 8, respectively, was put into an erlenmeyer flask; taking 50ml of simulated ammonia nitrogen wastewater with the concentration of 100mg/L and respectively putting the simulated ammonia nitrogen wastewater into conical flasks; the conical flask is placed into a digital display constant temperature shaking table, the conical flask is rotated for 1h at the temperature of 20 ℃ and at the speed of 135r/min, then the conical flask is kept stand for 30min, supernatant is taken to measure the adsorption effect of the conical flask on ammonia nitrogen, and the removal rate of the ammonia nitrogen is shown in the following table 1.
TABLE 1
| Sample (I) | Removal ratio of Ammonia Nitrogen (%) | Sample (I) | Removal ratio of Ammonia Nitrogen (%) |
| Example 1 | 85 | Comparative example 1 | 76 |
| Example 2 | 83 | Comparative example 2 | 77 |
| Example 3 | 79 | Comparative example 3 | 69 |
| Example 4 | 83 | Comparative example 4 | 80 |
| Example 5 | 80 | Comparative example 5 | 74 |
| Comparative example | 28 | Comparative example 6 | 42 |
| Comparative example 7 | 56 | ||
| Comparative example 8 | 83 |
As can be seen from the data in table 1, the removal of ammonia nitrogen was low for the zeolite without any treatment (comparative example), and the products of comparative examples 1 to 8, although having improved ammonia nitrogen removal, were less than ideal as compared with the product of the present invention.
Experimental example 2
Separately taking untreated boil0.04g of the composite water body purification material prepared in the stone (comparison example), the examples 1 to 5 and the comparison examples 1 to 8 is soaked in 20ml of methylene blue solution with the concentration of 0.01mmol/L for 2 hours; the light intensity for the solution is 365nm and 2mW/cm2The UV absorption value of the solution was determined every 20min at 665nm (absorption maximum of methylene blue). The results are shown in Table 2.
TABLE 2
It can be seen from the data in table 2 that the zeolite without any treatment (comparative example) has almost no degradation effect on methylene blue, while the product prepared by the preparation method of the present invention has excellent degradation effect on methylene blue.
Experimental example 3
100g of sediment sample is filled in a 500mL narrow-mouth bottle reactor, deionized water is used for filling to 500mL, and the sediment sample is stored for 7 days under closed and light-shading conditions at 20 ℃ until the sediment sample is anaerobic. Then, the composite water purification materials prepared in the untreated zeolite (comparative example), examples 1 to 5 and comparative examples 1 to 8 were respectively added to the reactor to perform a restoration test, and the change of dissolved oxygen of the water sample within 3 hours was measured, and the results are shown in table 3 below.
TABLE 3
| Sample (I) | Dissolved oxygen (mg/L) after 3h | Sample (I) | Dissolved oxygen (mg/L) after 3h |
| Example 1 | 4.28 | Comparative example 1 | 3.27 |
| Example 2 | 4.21 | Comparative example 2 | 3.78 |
| Example 3 | 4.32 | Comparative example 3 | 1.57 |
| Example 4 | 4.19 | Comparative example 4 | 4.15 |
| Example 5 | 4.23 | Comparative example 5 | 4.12 |
| Comparative example | 0 | Comparative example 6 | 2.11 |
| Comparative example 7 | 1.87 | ||
| Comparative example 8 | 0.78 |
As can be seen from the data in table 3, the zeolite without any treatment (comparative example) has no repairing effect on the water body and cannot increase the dissolved oxygen concentration. The product of the invention has obvious effect.
Experimental example 4
Preparing turbid water: the water for turbidity test was taken from the reservoir, the turbidity-prepared clay was taken from the upstream of the reservoir, the clay and water recovered were sufficiently assimilated, after standing for 2 hours, the upper suspension was taken to have a turbidity of 10NTU, the composite water-purifying materials prepared in the untreated zeolite (comparative example), examples 1 to 5 and comparative examples 1 to 8 were respectively added in an amount of 8mg/L, and after standing for 2 hours, the turbidity of the solution was measured, and the results are shown in table 4 below.
TABLE 4
| Sample (I) | Turbidity (NTU) | Sample (I) | Turbidity (NTU) |
| Example 1 | 0.56 | Comparative example 1 | 2.43 |
| Example 2 | 1.07 | Comparative example 2 | 3.57 |
| Example 3 | 0.98 | Comparative example 3 | 2.98 |
| Example 4 | 1.07 | Comparative example 4 | 4.52 |
| Example 5 | 0.74 | Comparative example 5 | 0.54 |
| Comparative example | 9.1 | Comparative example 6 | 3.11 |
| Comparative example 7 | 5.41 | ||
| Comparative example 8 | 7.9 |
As can be seen from the data in Table 4, the zeolite without any treatment (comparative example) had substantially no flocculation effect, and the alumina produced in comparative example 8 had lost activity and had poor flocculation effect because the drying temperature was 160 ℃. The flocculation effect of the product of the invention is greatly enhanced with respect to the zeolite and the product of the comparative example without any treatment.
Claims (16)
1. A preparation method of a multifunctional composite water body purification material comprises the following steps:
1) sieving natural zeolite powder with 100 mesh sieve to remove large particle size particles, and adding Na2O2Adding the powder into a planetary ball mill together to be ground for 30 minutes;
2) adding Ti (OH) into the mixture in the step 1) in sequence4Suspension and Ca (OH)2Continuously grinding the suspension for 1-3 hours;
3) then adding Al (OH) into the mixture in the step 2)3Continuously grinding the suspension for 1-3 hours to form 200-mesh slurry;
4) heating and refluxing the slurry obtained in the step 3) for 4-8 hours to obtain a preliminary material of a zeolite-loaded active alumina, nano titanium oxide and calcium peroxide compound;
5) drying the primary material obtained in the step 4) at 70-80 ℃ for 8-12 hours to obtain the final composite water body purifying material.
2. The method according to claim 1, wherein the Na in step 1) is contained in an amount of 100 parts by weight of the natural zeolite powder2O2The powder is added in an amount of 4 to 25 parts by weight.
3. The method according to claim 2, wherein the Na in step 1) is contained in an amount of 100 parts by weight of the natural zeolite powder2O2The powder is added in an amount of 6 to 20 parts by weight.
4. The method according to claim 3, wherein the Na in step 1) is contained in an amount of 100 parts by weight based on the natural zeolite powder2O2The powder is added in an amount of 8 to 15 parts by weight.
5. The method according to claim 1, wherein in the step 2), Ti (OH)4The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 5:100 to 50: 100; the Ti (OH)4The concentration of the suspension is 0.8g/mL to 1.2 g/mL.
6. The method according to claim 5, wherein in the step 2), Ti (OH)4The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 8:100 to 35: 100.
7. The method according to claim 6, wherein in the step 2), Ti (OH)4The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 10:100 to 25: 100.
8. The method according to claim 1, wherein Ca (OH) in the step 2)2The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 5:100 to 40: 100; the Ca (OH)2The concentration of the suspension is 0.5g/mL to 0.8 g/mL.
9. The method according to claim 8, wherein Ca (OH) in the step 2)2The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 10:100 to 35: 100.
10. The method according to claim 9, wherein Ca (OH) in the step 2)2In the same amount as the naturalThe weight ratio of the zeolite powder is 15:100 to 20: 100.
11. The method according to claim 1, wherein Al (OH) in the step 3)3The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 5:100 to 30: 100; the Al (OH)3The concentration of the suspension is 1.6g/mL to 2.0 g/mL.
12. The method according to claim 11, wherein Al (OH) in the step 3)3The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 5:100 to 20: 100.
13. The method according to claim 12, wherein Al (OH) in the step 3)3The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 5:100 to 15: 100.
14. The method of claim 1, comprising the steps of:
1) sieving with 100 mesh sieve to remove large particle size particles, 100g natural zeolite powder and 12g Na2O2Adding the powder into a planetary ball mill together to be ground for 30 minutes;
2) adding Ti (OH) with the concentration of 0.8g/mL into the mixture in the step 1) in sequence4Suspension and Ca (OH) at a concentration of 0.5g/mL2Grinding the suspension for 1-3 hr, wherein the grinding time is Ti (OH)4The weight ratio of the added amount of the natural zeolite powder to the natural zeolite powder is 20:100, Ca (OH)2The weight ratio of the added amount of the zeolite to the natural zeolite powder is 15: 100;
3) then, Al (OH) was added to the mixture in step 2) at a concentration of 1.8g/mL3Grinding the suspension for 1-3 hr to obtain 200 mesh slurry, Al (OH)3The weight ratio of the added amount of the zeolite to the natural zeolite powder is 15: 100;
4) heating and refluxing the slurry obtained in the step 3) for 5 hours to obtain a preliminary material of a zeolite-loaded activated alumina, nano titanium oxide and calcium peroxide compound;
5) drying the primary material obtained in the step 4) at 70-80 ℃ for 8-12 hours to obtain the final composite water body purifying material.
15. A multifunctional composite water purification material prepared by the preparation method according to any one of claims 1 to 14.
16. The use of the multifunctional composite water purification material according to claim 15 in the purification of environmental water.
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| US20150129502A1 (en) * | 2013-11-14 | 2015-05-14 | The Trustees Of The Stevens Institute Of Technology | Graphene oxide-modified materials for water treatment |
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