CN113426451A - Preparation method and application of micron ozone catalyst - Google Patents
Preparation method and application of micron ozone catalyst Download PDFInfo
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 239000003054 catalyst Substances 0.000 title claims abstract description 89
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229960000892 attapulgite Drugs 0.000 claims abstract description 23
- 229910052625 palygorskite Inorganic materials 0.000 claims abstract description 23
- 230000003197 catalytic effect Effects 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 33
- 239000002245 particle Substances 0.000 claims description 20
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 229910004664 Cerium(III) chloride Inorganic materials 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 238000012216 screening Methods 0.000 abstract description 2
- 238000005470 impregnation Methods 0.000 abstract 1
- 239000012266 salt solution Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000006385 ozonation reaction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004912 1,5-cyclooctadiene Substances 0.000 description 1
- YIWGJFPJRAEKMK-UHFFFAOYSA-N 1-(2H-benzotriazol-5-yl)-3-methyl-8-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carbonyl]-1,3,8-triazaspiro[4.5]decane-2,4-dione Chemical compound CN1C(=O)N(c2ccc3n[nH]nc3c2)C2(CCN(CC2)C(=O)c2cnc(NCc3cccc(OC(F)(F)F)c3)nc2)C1=O YIWGJFPJRAEKMK-UHFFFAOYSA-N 0.000 description 1
- CVOFKRWYWCSDMA-UHFFFAOYSA-N 2-chloro-n-(2,6-diethylphenyl)-n-(methoxymethyl)acetamide;2,6-dinitro-n,n-dipropyl-4-(trifluoromethyl)aniline Chemical compound CCC1=CC=CC(CC)=C1N(COC)C(=O)CCl.CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O CVOFKRWYWCSDMA-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002638 heterogeneous catalyst Substances 0.000 description 1
- 239000002815 homogeneous catalyst Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000003921 particle size analysis Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/83—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B01J35/40—
-
- B01J35/613—
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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Abstract
The invention discloses a preparation method of a micron ozone catalyst, which comprises the steps of pretreatment of an attapulgite carrier, impregnation of Fe and Ce salt solution, roasting of active components, screening of the catalyst, washing, drying and the like. The invention also discloses an application of the micron ozone catalyst in treating town tail water. The invention overcomes the problems of low catalytic efficiency of the millimeter-sized ozone catalyst and high recovery cost of the nanometer-sized ozone catalyst, and solves the problem of difficult reutilization of the homogeneous-sized ozone catalyst.
Description
Technical Field
The invention belongs to the technical field of ozone catalysts, and particularly relates to a preparation method and application of a micron-sized ozone catalyst.
Background
The establishment of the high discharge standard of urban sewage is an advanced guide for ensuring the clean discharge of sewage treatment plants and improving the water environment quality. The technology for high-standard discharge of town tail water still needs to pay special attention to deep degradation of residual carbon sources in solving the problems of traditional COD, nitrogen, phosphorus and the like.
The ozone oxidation has the characteristics of strong oxidation capacity, short reaction time and no secondary pollution, and is a research focus and a hot spot in the field of advanced treatment of urban sewage. However, ozone oxidation is selective, the reaction rate with organic matters in water is slow, and the ozone oxidation technology alone is difficult to ensure high standard discharge of town sewage. In recent years, researches show that hydroxyl radicals generated in the catalytic ozonation process can non-selectively oxidize most organic matters, so that the possibility is provided for removing low-concentration organic matters in town tail water, and the development of a catalyst is the core and the key of the catalytic ozonation technology.
Compared with a homogeneous ozone catalyst, the heterogeneous ozone catalyst has the advantages of difficult loss of active components, simple and convenient recovery and better application prospect. The types of heterogeneous ozone catalysts commonly available on the market at present are: metal oxide type catalysts such as manganese oxide, aluminum oxide and iron oxide; and supported catalysts, such as ceramsite supported type, activated carbon supported type and mineral supported type. Among many choices, attapulgite has abundant resources, special crystal morphology, good adsorption performance and excellent surface chemical properties, so that the attapulgite is suitable for being used as a good carrier for preparing an ozone catalyst. The ozone catalyst may be classified into a nano type, a micro type and a nano type according to the particle size of the heterogeneous catalyst. Although the ozone catalytic efficiency of the nano-type catalyst is higher than that of the micron-type catalyst, the preparation cost of the nano-type catalyst is higher, the separation and recovery difficulty is higher in the large-scale use process, and the conversion rate of hydroxyl radicals of the millimeter-type catalyst is lower than that of the micron-type catalyst.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a preparation method and application of a micron-sized ozone catalyst, and aims to solve the problems that the traditional millimeter-sized ozone catalyst is low in catalytic efficiency, the nanometer-sized ozone catalyst is high in recovery cost, and the homogeneous catalyst is difficult to recycle.
The invention provides a preparation method of a micron-sized ozone catalyst, which comprises the following steps:
s1, dispersing the repeatedly washed attapulgite in water to form an attapulgite water solution, and adding polyacrylamide into the attapulgite water solution to obtain a primary mixture;
s2, adding FeCl3 and CeCl3 with the same mass into the primary mixture, and stirring to obtain a turbid liquid;
s3, sequentially carrying out suction filtration, roasting and sieving on the turbid liquid to respectively obtain a micron type small particle solid and a millimeter type large particle solid;
s4, washing and drying the micron-sized small-particle solid to obtain the micron-sized ozone catalyst.
Preferably, in S1, the mass concentration of the attapulgite water solution is 100 g/L; the mass ratio of the polyacrylamide to the attapulgite is 0.1: 100.
preferably, in S2, the mass ratio of the FeCl3 to the attapulgite is 1: 100; the concrete operation of stirring is: stirring for 12h at room temperature and a stirring speed of 250 r/min.
Preferably, in S3, the calcination conditions are: the roasting temperature is 400-600 ℃, and the roasting time is 2-4 h.
Preferably, the roasting temperature is 500 ℃ and the roasting time is 3 h.
Preferably, in S3, sieving is performed at 120 mesh.
Preferably, in S4, the micron-sized small particle solid is washed 3 times with a mixture of water and ethanol, and dried at 105 ℃ for 1h to obtain the micron-sized ozone catalyst.
The invention also provides an application of the obtained micron ozone catalyst in treating town tail water.
Preferably, the micron ozone catalyst is adopted to remove low-concentration organic matters in the town tail water, and the specific method comprises the following steps: adding the micron ozone catalyst into town tail water (COD concentration is 65-75mg/L), and introducing ozone to perform catalytic oxidation reaction; the dosage of the micron ozone catalyst is 0.05-0.15 g/L.
Preferably, the adding amount of the micron-type ozone catalyst is 0.1g/L, the adding amount of the ozone is 1g/h, and the reaction time of the catalytic oxidation reaction is 15 min.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the attapulgite with wide source and low cost is utilized, the metal oxide with high catalytic activity Fe and Ce is loaded by a leaching-stagnation method, the micron ozone catalyst is selected by screening and orienting, the ozone catalyst with high efficiency and low consumption can be prepared, and the special property of magnetic iron is beneficial to separation and recovery of the ozone catalyst.
2. The invention overcomes the problems of low catalytic efficiency of the millimeter-sized ozone catalyst and high recovery cost of the nanometer-sized ozone catalyst, and solves the problem of difficult reutilization of the homogeneous-phase ozone catalyst.
3. Compared with the ozone oxidation technology and the millimeter-type catalyst catalytic ozone oxidation technology, the method adopts the micron-type ozone catalyst, so that the removal efficiency of low-concentration organic matters in the town tail water is improved.
4. The attapulgite-loaded Fe-Ce bi-component ozone catalyst prepared by the invention has the advantages of average particle size of 34.0 mu m, irregular surface appearance and specific surface area of 44.6m2/g。
5. The micron ozone catalyst obtained by the invention can treat town tail water for 15min, and the COD removal rate is 44.9-52.5%; in addition, after the micron-type ozone catalyst obtained by the invention is continuously used for 5 times, the COD removal rate is only reduced by 5.0%, and the micron-type ozone catalyst has good stability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a particle size distribution diagram of a micron-sized ozone catalyst obtained in example 5 of the present invention.
FIG. 2 is a scanning electron micrograph of the micron ozone catalyst obtained in example 5 of the present invention.
FIG. 3 is a graph showing the comparison of COD removing effects of different treatment methods in test example 2 of the present invention.
FIG. 4 is a graph showing the effect of removing COD after the micron ozone catalyst was recycled in test example 3 of the present invention.
Detailed Description
The following examples are provided to better understand the present invention, not to limit the scope of the present invention, and any products similar or equivalent to the present invention, which can be obtained by combining the features of the present invention with other prior art according to the teaching of the present invention, are within the scope of the present invention.
Example 1
A preparation method of a micron-sized ozone catalyst comprises the following steps:
s1, dispersing the repeatedly washed attapulgite in water to form an attapulgite water solution, and adding polyacrylamide into the attapulgite water solution to obtain a primary mixture; the mass concentration of the attapulgite water solution is 100g/L, and the mass ratio of polyacrylamide to attapulgite is 0.1: 100, respectively;
s2, adding FeCl with the same mass into the initial mixture3And CeCl3Stirring for 12 hours at room temperature and at the stirring speed of 250r/min to obtain turbid liquid; the FeCl3The mass ratio of the attapulgite to the attapulgite is 1: 100;
s3, sequentially carrying out suction filtration, roasting and sieving at 120 meshes on the turbid liquid to respectively obtain a micron small-particle solid and a millimeter large-particle solid;
s4, mixing the micron-type small-particle solid with a solvent in a volume ratio of 1:1, washing for 3 times, and drying at 105 ℃ for 1h to obtain the micron ozone catalyst.
Wherein the roasting conditions are as follows: the roasting temperature is 400 ℃, and the roasting time is 2 hours.
Example 2
A method for preparing a micron-sized ozone catalyst, which is different from the method in example 1: the roasting conditions are as follows: the roasting temperature is 500 ℃, and the roasting time is 2 hours.
Example 3
A method for preparing a micron-sized ozone catalyst, which is different from the method in example 1: the roasting conditions are as follows: the roasting temperature is 600 ℃, and the roasting time is 2 h.
Example 4
A method for preparing a micron-sized ozone catalyst, which is different from the method in example 1: the roasting conditions are as follows: the roasting temperature is 400 ℃, and the roasting time is 3 hours.
Example 5
A method for preparing a micron-sized ozone catalyst, which is different from the method in example 1: the roasting conditions are as follows: the roasting temperature is 500 ℃, and the roasting time is 3 h.
Example 6
A method for preparing a micron-sized ozone catalyst, which is different from the method in example 1: the roasting conditions are as follows: the roasting temperature is 600 ℃, and the roasting time is 3 h.
Example 7
A method for preparing a micron-sized ozone catalyst, which is different from the method in example 1: the roasting conditions are as follows: the roasting temperature is 400 ℃, and the roasting time is 4 hours.
Example 8
A method for preparing a micron-sized ozone catalyst, which is different from the method in example 1: the roasting conditions are as follows: the roasting temperature is 500 ℃, and the roasting time is 4 hours.
Example 9
A method for preparing a micron-sized ozone catalyst, which is different from the method in example 1: the roasting conditions are as follows: the roasting temperature is 600 ℃, and the roasting time is 4 h.
(1) The micron-sized ozone catalyst obtained in example 5 was subjected to particle size analysis to obtain a particle size distribution diagram as shown in fig. 1; wherein the abscissa is the particle size of the ozone catalyst, and the ordinate is the proportion of the ozone catalyst with a certain interval particle size in the total prepared ozone catalysts with different particle sizes; as can be seen from FIG. 1, the average particle diameter of the ozone catalyst was 34.0. mu.m.
(2) Scanning electron microscope detection is carried out on the micron-type ozone catalyst obtained in the example 5, so as to obtain a scanning electron microscope image shown in fig. 2, and as can be seen from fig. 2, the surface of the micron-type ozone catalyst presents irregular shapes.
Test example 1
Town tail water is treated by the micron type ozone catalyst obtained in the example 1-9 respectively, and the treatment method comprises the following steps: adding town tail water (COD concentration is 65-75mg/L) into a reactor, and adding ozone catalysts with different particle sizes into the reactor, wherein the adding amount is 0.1 g/L; and (3) introducing ozone into the reactor to perform catalytic oxidation reaction, wherein the adding amount of the ozone is 1g/h, the reaction time is 15min, and thus the town tail water treatment is completed. The corresponding town tail water COD removal rate is shown in the following table:
test example 2
Town tail water treatment was carried out by the method of test example 1 using the micron type ozone catalyst obtained in example 5, and the COD removal rate was measured as a control against treatment with ozone alone and treatment with oxygen alone to obtain a comparison graph of the COD removal effect of the town tail water as shown in FIG. 3 (sampling every 3min, 15min total); wherein 1 represents the micron ozone catalyst obtained in example 5, 2 represents single ozone, and 3 represents single oxygen, and it can be seen from fig. 3 that when oxygen is used alone as a control, the removal rate of COD is 4.3%, which indicates that air stripping has little influence on the removal of low-concentration organic matters in town tail water, the removal rate of COD in town tail water treated by ozone alone reaches 28.2%, and the addition of the micron ozone catalyst increases the removal rate of COD to 52.5%, which indicates that the catalyst has high efficiency in removing low-concentration organic matters in town tail water through catalytic oxidation.
Wherein, the method for treating by using the ozone alone comprises the following steps: adding town tail water (COD concentration is 65-75mg/L) into a reactor, introducing ozone into the reactor for oxidation reaction, wherein the introduction amount of the ozone is 1g/h, and the reaction time is 15min, thereby finishing the treatment of the town tail water.
The method for treating with oxygen alone is as follows: adding town tail water (COD concentration 65-75mg/L) into a reactor, introducing oxygen into the reactor for reaction, wherein the introduction amount of the oxygen is 1g/h, and the reaction time is 15min, thus finishing the treatment of the town tail water.
Test example 3
The micron ozone catalyst obtained in example 5 is used for town tail water treatment by the method of test example 1, and is recycled for 5 times to obtain the COD removal effect graph of the micron ozone catalyst shown in FIG. 4, and as can be seen from FIG. 4, the micron ozone catalyst still has high catalytic performance after being repeatedly used for 5 times, which indicates that the catalyst has good stability.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields, and are within the scope of the present invention.
Claims (10)
1. The preparation method of the micron ozone catalyst is characterized by comprising the following steps of:
s1, adding polyacrylamide into the attapulgite water solution to obtain a primary mixture;
s2, adding FeCl with the same mass into the initial mixture3And CeCl3Stirring to obtain turbid liquid;
s3, sequentially carrying out suction filtration, roasting and sieving on the turbid liquid to respectively obtain a micron type small particle solid and a millimeter type large particle solid;
s4, washing and drying the micron-sized small-particle solid to obtain the micron-sized ozone catalyst.
2. The method for producing a micron type ozone catalyst as claimed in claim 1, wherein in S1, the mass concentration of the attapulgite water solution is 100 g/L; the mass ratio of the polyacrylamide to the attapulgite is 0.1: 100.
3. the method of claim 1, wherein in S2, the FeCl is3The mass ratio of the attapulgite to the attapulgite is 1: 100; the concrete operation of stirring is: stirring for 12h at room temperature and a stirring speed of 250 r/min.
4. The method for preparing the micron type ozone catalyst as set forth in claim 1, wherein in S3, the calcination conditions are: the roasting temperature is 400-600 ℃, and the roasting time is 2-4 h.
5. The method for preparing the micron type ozone catalyst as claimed in claim 4, wherein the calcination temperature is 500 ℃ and the calcination time is 3 hours.
6. The method for preparing a micron form ozone catalyst as claimed in claim 1, wherein in S3, the sieve is used at 120 mesh.
7. The method for preparing the micron-sized ozone catalyst as claimed in claim 1, wherein the micron-sized small particle solid is washed 3 times with a mixture of water and ethanol and dried at 105 ℃ for 1 hour in S4 to obtain the micron-sized ozone catalyst.
8. Use of the micro-ozone catalyst obtained according to any of claims 1-7 for the treatment of town tail water.
9. The application of the micron-type ozone catalyst in the removal of low-concentration organic matters in town tail water according to claim 8 is characterized in that the method comprises the following steps: adding the micron ozone catalyst into town tail water, and introducing ozone to perform catalytic oxidation reaction; the dosage of the micron-type ozone catalyst is 0.05-0.15 g/L.
10. The use of claim 9, wherein the amount of the micron-sized ozone catalyst added is 0.1g/L, the amount of the ozone added is 1g/h, and the reaction time of the catalytic oxidation reaction is 15 min.
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| CN116282468A (en) * | 2023-02-13 | 2023-06-23 | 中建安装集团有限公司 | Advanced wastewater treatment system and method |
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Application publication date: 20210924 |