CN107298503B - Household fluorine-removing water purifier with porous ceramic plate and manufacturing method thereof - Google Patents
Household fluorine-removing water purifier with porous ceramic plate and manufacturing method thereof Download PDFInfo
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- CN107298503B CN107298503B CN201710551252.7A CN201710551252A CN107298503B CN 107298503 B CN107298503 B CN 107298503B CN 201710551252 A CN201710551252 A CN 201710551252A CN 107298503 B CN107298503 B CN 107298503B
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- C02F9/00—Multistage treatment of water, waste water or sewage
- C02F9/20—Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
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- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/583—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing fluoride or fluorine compounds
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- 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
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
- C02F2101/14—Fluorine or fluorine-containing compounds
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- C02F2201/002—Construction details of the apparatus
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- C02F2305/10—Photocatalysts
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- C02F2307/00—Location of water treatment or water treatment device
- C02F2307/10—Location of water treatment or water treatment device as part of a potable water dispenser, e.g. for use in homes or offices
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
Abstract
The invention belongs to the technical field of drinking water treatment, and relates to a household fluorine-removing water purifier with a porous ceramic disc and a manufacturing method thereof. The household defluorination water purifier is formed by sequentially connecting a first-stage treatment system, a second-stage treatment system and a third-stage treatment system from top to bottom, wherein the first-stage treatment system is a porous ceramic disc formed by firing clay, deer methane, bentonite, rice hulls and calcium oxide, and nano titanium dioxide modified by silver and rare earth is sprayed on the surface of the porous ceramic disc; the secondary treatment system is composed of a PP cotton filter element supported in the middle of a spiral activated carbon fiber, and the lower part of the PP cotton filter element is connected with a plastic pipe; the three-stage treatment system is a disc consisting of medical stones; the water purifier can realize deep purification of water, particularly remove fluorine in water, and the treated water contains various trace elements and mineral substances, is beneficial to human health, is economical and practical, and is environment-friendly and green.
Description
Technical Field
The invention belongs to the technical field of drinking water treatment, and particularly relates to a household fluorine-removing water purifier with a porous ceramic disc and a manufacturing method thereof.
Background
Along with the development of society and economy, the living standard of people is improved, the requirement of people on the quality of drinking water is higher and higher, fluorine is taken as a trace element widely distributed in human bones and teeth and is closely related to the health of people, the fluorine element in the human body mainly comes from drinking water and food intake, the bone growth and development can be promoted and the decayed teeth can be prevented by taking a proper amount of fluorine, the teeth are stained by taking excessive fluorine, the bones can be deformed by serious people, the labor force is gradually lost, and the fluorosis is caused.
In China, northern China and northwest China, rainfall is rare, illumination is strong, evaporation capacity is high, climate is arid, fluorides are easily enriched in surface water and shallow groundwater, and most rural areas in China are filled with well water, and surface water and shallow groundwater are drunk. According to statistics, about fifty million people in China drink high-fluorine water, so that the development of the composite family water purifier capable of removing fluorine and other pollutants in water, the improvement of the life quality of people and the reduction of the incidence rate of endemic fluorine diseases become important tasks in the aspect of environment-friendly drinking water.
Regarding the defluorination water purifier, chinese patent CN101544432A describes a broad-spectrum water purification device, which can remove many kinds of pollutants, but the device is cumbersome, the water purification process is slow, and the device depends on electric power during the operation process, and the environment-friendly and green purpose can not be really realized for some rural areas without power; chinese patent CN1939842A describes a multifunctional household water purifier, which can be used for multiple purposes, but needs the user to add alumina into an activation box to remove fluorine in water, which is inconvenient to operate in the actual use process and difficult to popularize for users without water purification consciousness; the patent publication CN103693796B describes a rural small drinking water fluorine removal device, which utilizes modified alumina to remove fluorine in water, the method has stable water outlet, but has long contact time, high price and troublesome regeneration, and the drinking water is not suitable for actual conditions in rural areas, which may cause the problem that the aluminum in the water outlet exceeds the standard; the publication patent 102153365A describes that the composite antibacterial far infrared medical stone porous ceramic ball can remove fluorine in water, and can purify and activate water in the using process, but the ceramic ball is compacted by water pressure after long-term operation, the contact area of the ceramic ball and raw water is reduced, the treatment effect is reduced, and the treatment speed is reduced.
Disclosure of Invention
The invention aims to provide a household fluorine-removing water purifier with a porous ceramic plate and a manufacturing method thereof, and the household fluorine-removing water purifier is characterized in that the household fluorine-removing water purifier is formed by sequentially connecting a first-stage treatment system, a second-stage treatment system and a third-stage treatment system from top to bottom, wherein the first-stage treatment system is the porous ceramic plate formed by firing clay, deer marsh soil, bentonite, rice hulls and calcium oxide; the secondary treatment system is composed of a PP cotton filter element supported in the middle of a spiral activated carbon fiber, and the lower part of the PP cotton filter element is connected with a plastic pipe; the three-stage treatment system is a disc consisting of medical stones.
The weight ratio of the clay, the deer biogas soil, the bentonite, the rice hull and the calcium oxide is (4-6) to (2-3) to (1-1.5): (2-2.5): (1-2).
The deer biogas and bentonite in the primary treatment system have good effect of removing fluorine in water, rice hulls are used as pore-forming agents and volatilize in the combustion process, and calcium oxide is an inorganic bactericide with good effect; the surface of the porous ceramic plate is sprayed with nano titanium dioxide modified by silver and rare earth, and suspended matters, bacteria, viruses and partial heavy metals in raw water can be effectively removed under the action of the cover and the reflector; the cover is a transparent cover, and the reflector plate provides illumination for the photocatalytic sterilization effect of the modified nano titanium dioxide on the surface of the porous ceramic plate;
the secondary treatment system mainly adsorbs harmful substances such as inorganic heavy metals, bacteria and the like in raw water to realize the deep treatment of water, the spiral active carbon fiber can save filter materials and improve the filtration rate, and the PP cotton filter element also adsorbs the harmful substances in the water to a certain extent;
the three-stage treatment system can further adsorb microorganisms in water, increase trace elements and mineral substances in water and improve the quality of the effluent.
The manufacturing method of the household fluorine-removing water purifier with the porous ceramic plate is characterized by comprising the following specific steps:
(1) preparing a porous ceramic plate: drying, sieving and drying clay, palustre, bentonite and natural rice hulls according to the weight ratio of (4-6) to (2-3) to (1-1.5): (2-2.5): mixing and stirring the mixture in the proportion of (1-2) and deionized water into a mud shape, pressing the mud, naturally drying the mud, placing the mud in a muffle furnace for firing and preserving heat to obtain a porous ceramic plate with a good defluorination effect;
(2) spraying modified nano titanium dioxide on the surface of the porous ceramic plate: preparing silver-cerium co-doped nano titanium dioxide dispersion liquid by taking nano titanium dioxide, silver nitrate, 2-propanol and cerium nitrate solution as raw materials, spraying the prepared dispersion liquid on the surface of a porous ceramic disc by using a spray gun, and placing the porous ceramic disc in an oven for drying to form a primary treatment system;
(3) the PP cotton filter element is supported in the middle of the spiral activated carbon fiber, the outer diameter of the spiral activated carbon fiber is contacted with the inner wall of the defluorination water purifier to form a secondary treatment system, the lower end of the PP cotton filter element is connected with the plastic pipe, and the upper end of the PP cotton filter element is connected with the porous ceramic disc; the lower end of the plastic pipe is connected with a three-stage treatment system consisting of a medical stone disc;
(4) the tap is arranged on the wall of the defluorination water purifier between the medical stone disc and the bottom of the defluorination water purifier, thus completing the manufacture of the household defluorination water purifier with the porous ceramic disc.
The drying, sieving and re-drying treatment in the step (1) is drying in an oven at 80 ℃ for 1 hour, grinding in a ball mill, sieving rice hulls with a 40-mesh sieve, sieving clay with a 80-mesh sieve, sieving bentonite and deer biogas soil with a 100-mesh sieve, and drying the sieved soil in the oven at 80 ℃ for 10 hours.
The deionized water in the step (1) is a binder.
In the step (1), the heating rate of the muffle furnace firing is 2 ℃/min, the temperature is raised to 1000 ℃, the total firing time is 500 minutes, and the temperature is kept at 1000 ℃ for 1-2 hours.
The spraying distance of the spray gun in the step (2) is 50cm, the spraying time is 15 seconds, and the drying temperature of the oven is 40 ℃.
The preparation of the silver-cerium co-doped nano titanium dioxide dispersion liquid in the step (2) comprises the following steps: mixing nano titanium dioxide with silver nitrate and 2-propanol, dissolving the mixture into 500mL of deionized water, placing the mixture in a quartz container, magnetically stirring the mixture for 1h, irradiating the mixture in a black box for 1h by using a 125W high-pressure mercury lamp, standing the mixture in the dark place for 6h, adding a cerium nitrate solution with the mass fraction of 0.6%, placing the mixture in a reaction kettle for reaction, washing and drying the mixture to obtain silver-rare earth composite doped nano titanium dioxide powder, dispersing the obtained powder in titanium dioxide dispersion, ultrasonically treating the mixture for 1h by ultrasonic waves, and magnetically stirring the mixture for 1h to obtain the modified nano titanium dioxide dispersion.
The mass fraction of the nano titanium dioxide is 2-3%, the mass fraction of silver relative to the titanium dioxide is 0.5-2%, and the mass fraction of cerium relative to the titanium dioxide is 0.5-1.5%.
The reaction temperature in the reaction kettle is 180-200 ℃, and the reaction time is 24 hours.
The invention has the beneficial effects that: the water filtered by the primary treatment system of the water purifier has bacteria and fluoride contents meeting the drinking water standard; the water purifier can realize deep purification of water, particularly remove fluorine in the water, improve the water quality, and the treated effluent contains various trace elements and mineral substances, thereby being beneficial to the health of human bodies; stable water outlet, convenient operation, simple process, economy, environmental protection and green.
Drawings
Fig. 1 is a schematic view of a household fluorine-removing water purifier with a porous ceramic plate.
Description of the main reference numerals:
1 cover 2 wall
3 PVC reflector 4 primary treatment system-porous ceramic plate
5 two-stage filtration system-activated carbon fiber 6 PP cotton filter element
7 three-stage filtering system-natural medical stone 8 water tap
9 machine bottom
Detailed Description
The invention provides a household fluorine-removing water purifier with a porous ceramic plate and a manufacturing method thereof, and the invention is further explained by combining the attached drawings and the embodiment.
A porous ceramic plate domestic fluorine removal water purifier as shown in figure 1. The external structure consists of a cover 1, a wall 2, a water tap 8 and a bottom 9; the internal structure is formed by sequentially connecting a first-stage treatment system, a second-stage treatment system and a third-stage treatment system from top to bottom, wherein the PVC reflector 3 and the porous ceramic disc 4 form a first-stage treatment system, and the PVC reflector 3 provides illumination for the photocatalytic sterilization effect of the modified nano titanium dioxide on the surface of the porous ceramic disc 4; the activated carbon fiber 5 and the PP cotton filter element 6 form a secondary treatment system, the PP cotton filter element 6 is supported in the middle of the spiral activated carbon fiber 5, and a plastic pipe is connected below the PP cotton filter element; the natural medical stone 7 is a three-level treatment system, and the water tap 8 is arranged on the wall between the natural medical stone 7 and the vessel bottom 9; the water flows in through the top end of the cover, is subjected to defluorination filtration by the first, second and third treatment systems and flows out of the faucet.
Example 1
A porous ceramic plate for removing fluorine is prepared from the following materials: drying soil, palustris soil, bentonite and natural rice hulls in an oven at 80 ℃ for 1 hour, grinding in a ball mill, sieving the rice hulls with a 60-mesh sieve, sieving the clay with a 60-mesh sieve, sieving the bentonite with a 80-mesh sieve, sieving the palustris soil with a 100-mesh sieve, putting the sieved soil into the oven at 80 ℃ for drying for 10 hours, and mixing the clay: deer biogas soil: bentonite: rice hull: mixing and stirring calcium oxide in a weight ratio of 6:2:1:2:1, and stirring the mixture into a paste by taking deionized water as a binder in the process; placing the stirred mixture into a mold, molding with a molding press, and treating the surface with rollers to smooth the surface, and drying indoors or outdoors for 7-12 days according to temperature; finally, putting the completely dried porous ceramic sample into a muffle furnace for burning and heat preservation treatment to obtain a porous ceramic disc with a good defluorination effect; spraying modified silver-cerium co-doped nano titanium dioxide on the surface of the composite material, wherein the mass fraction of the nano titanium dioxide is 3%, the mass fraction of silver relative to the nano titanium dioxide is 2%, and the mass fraction of cerium relative to the nano titanium dioxide is 0.5%, so as to form a primary treatment system;
the second-level treatment system and the third-level treatment system are sequentially connected from top to bottom, and a water faucet is arranged below the third-level treatment system; the water bacteria and fluoride content filtered by the primary treatment system of the defluorination water purifier prepared by the embodiment can reach the drinking water standard, and the fluoride, arsenic, TOC and bacteria amount in the effluent of the whole defluorination water purifier all meet the drinking water requirement.
Example 2
A porous ceramic plate for removing fluorine is prepared from the following materials: drying soil, palustris soil, bentonite and natural rice hulls in an oven at 80 ℃ for 1 hour, grinding in a ball mill, sieving the rice hulls with a 80-mesh sieve, sieving the clay with a 80-mesh sieve, sieving the bentonite with a 80-mesh sieve, sieving the palustris soil with a 100-mesh sieve, putting the sieved soil into the oven at 80 ℃ for drying for 10 hours, and mixing the clay: deer biogas soil: bentonite: rice hull: mixing and stirring calcium oxide in a weight ratio of 4:3:1:2.5:2, and stirring the mixture into mud by using deionized water as a binder in the process; placing the stirred mixture into a mold, molding with a molding press, and treating the surface with rollers to smooth the surface, and drying indoors or outdoors for 7-12 days according to temperature; finally, putting the completely dried porous ceramic sample into a muffle furnace for burning and heat preservation treatment to obtain a porous ceramic disc with a good defluorination effect; spraying modified silver-cerium co-doped nano titanium dioxide on the surface of the titanium dioxide, wherein the mass fraction of the nano titanium dioxide is 2.5%, the mass fraction of silver relative to the nano titanium dioxide is 0.5%, and the mass fraction of cerium relative to the nano titanium dioxide is 1.5%, so as to form a primary treatment system;
the second-level treatment system and the third-level treatment system are sequentially connected from top to bottom, and a water faucet is arranged below the third-level treatment system; the water bacteria and fluoride content filtered by the primary treatment system of the defluorination water purifier prepared by the embodiment can reach the drinking water standard, and the fluoride, arsenic, TOC and bacteria amount in the effluent of the whole defluorination water purifier all meet the drinking water requirement.
Example 3
A porous ceramic plate for removing fluorine is prepared from the following materials: drying soil, palustris soil, bentonite and natural rice hulls in an oven at 80 ℃ for 1 hour, grinding in a ball mill, sieving the rice hulls with a 80-mesh sieve, sieving the clay with a 80-mesh sieve, sieving the bentonite with a 80-mesh sieve, sieving the palustris soil with a 100-mesh sieve, putting the sieved soil into the oven at 80 ℃ for drying for 10 hours, and mixing the clay: deer biogas soil: bentonite: rice hull: mixing and stirring calcium oxide with the weight ratio of 4:2:1.5:2:2, and stirring the mixture into mud by using deionized water as a binder in the process; placing the stirred mixture into a mold, molding with a molding press, and treating the surface with rollers to smooth the surface, and drying indoors or outdoors for 7-12 days according to temperature; finally, putting the completely dried porous ceramic sample into a muffle furnace for burning and heat preservation treatment to obtain a porous ceramic disc with a good defluorination effect; spraying modified silver-cerium co-doped nano titanium dioxide on the surface of the composite material, wherein the mass fraction of the nano titanium dioxide is 2%, and the mass fraction of the silver-cerium relative to the nano titanium dioxide is 0.5%, so as to form a primary treatment system;
the second-level treatment system and the third-level treatment system are sequentially connected from top to bottom, and a water faucet is arranged below the third-level treatment system; the water bacteria and fluoride content filtered by the primary treatment system of the defluorination water purifier prepared by the embodiment can reach the drinking water standard, and the fluoride, arsenic, TOC and bacteria amount in the effluent of the whole defluorination water purifier all meet the drinking water requirement.
Claims (9)
1. A household fluorine-removing water purifier with a porous ceramic plate is characterized in that the household fluorine-removing water purifier is formed by sequentially connecting a first-stage treatment system, a second-stage treatment system and a third-stage treatment system from top to bottom, wherein the first-stage treatment system is a porous ceramic plate formed by firing clay, deer marsh soil, bentonite, natural rice hulls and calcium oxide; the secondary treatment system is composed of a PP cotton filter element supported in the middle of a spiral activated carbon fiber, and the lower part of the PP cotton filter element is connected with a plastic pipe; the three-stage treatment system is a disc consisting of medical stones;
preparing a porous ceramic plate: drying and sieving clay, palustris soil, bentonite and natural rice hulls, and drying the sieved clay, palustris soil and bentonite, wherein the obtained clay, palustris soil, bentonite, natural rice hulls and calcium oxide are mixed according to the weight ratio of (4-6) to (2-3) to (1-1.5): (2-2.5): mixing and stirring the mixture in the proportion of (1-2) and deionized water into a mud shape, pressing the mud, naturally drying the mud, placing the mud in a muffle furnace for firing and preserving heat to obtain a porous ceramic plate with a good defluorination effect;
the surface of the porous ceramic plate is sprayed with silver and cerium modified nano titanium dioxide: preparing silver-cerium co-doped nano titanium dioxide dispersion liquid by taking nano titanium dioxide, silver nitrate, 2-propanol and cerium nitrate solution as raw materials, spraying the prepared dispersion liquid on the surface of a porous ceramic disc by using a spray gun, and placing the porous ceramic disc in an oven for drying to form a primary treatment system.
2. A method for manufacturing the porous ceramic disc household fluorine-removing water purifier as claimed in claim 1, which is characterized by comprising the following steps:
(1) preparing a porous ceramic plate: drying and sieving clay, palustris soil, bentonite and natural rice hulls, and drying the sieved clay, palustris soil and bentonite, wherein the obtained clay, palustris soil, bentonite, natural rice hulls and calcium oxide are mixed according to the weight ratio of (4-6) to (2-3) to (1-1.5): (2-2.5): mixing and stirring the mixture in the proportion of (1-2) and deionized water into a mud shape, pressing the mud, naturally drying the mud, placing the mud in a muffle furnace for firing and preserving heat to obtain a porous ceramic plate with a good defluorination effect;
(2) spraying modified nano titanium dioxide on the surface of the porous ceramic plate: preparing silver-cerium co-doped nano titanium dioxide dispersion liquid by taking nano titanium dioxide, silver nitrate, 2-propanol and cerium nitrate solution as raw materials, spraying the prepared dispersion liquid on the surface of a porous ceramic disc by using a spray gun, and placing the porous ceramic disc in an oven for drying to form a primary treatment system;
(3) the PP cotton filter element is supported in the middle of the spiral activated carbon fiber, the outer diameter of the spiral activated carbon fiber is contacted with the inner wall of the defluorination water purifier to form a secondary treatment system, the lower end of the PP cotton filter element is connected with the plastic pipe, and the upper end of the PP cotton filter element is connected with the porous ceramic disc; the lower end of the plastic pipe is connected with a three-stage treatment system consisting of a medical stone disc;
(4) the tap is arranged on the wall of the defluorination water purifier between the medical stone disc and the bottom of the defluorination water purifier, thus completing the manufacture of the household defluorination water purifier with the porous ceramic disc.
3. The method for manufacturing a porous ceramic disc household fluorine removal water purifier as claimed in claim 2, wherein the drying, sieving and re-drying treatment in step (1) is drying in an oven at 80 ℃ for 1 hour, grinding in a ball mill, sieving natural rice hulls with a 40-mesh sieve, sieving clay with a 80-mesh sieve, sieving bentonite and deer marsh with a 100-mesh sieve, and drying the sieved soil in an oven at 80 ℃ for 10 hours.
4. The method for manufacturing a porous ceramic disc household fluorine removal water purifier as claimed in claim 2, wherein the deionized water in step (1) is a binder.
5. The method for manufacturing a porous ceramic disc household fluorine-removing water purifier as claimed in claim 2, wherein the muffle furnace in the step (1) is fired at a heating rate of 2 ℃/min, the temperature is raised to 1000 ℃, the total firing time is 500 minutes, and the temperature is maintained at 1000 ℃ for 1-2 hours.
6. The method for manufacturing a porous ceramic disc household fluorine-removing water purifier as claimed in claim 2, wherein the spraying distance of the spray gun in the step (2) is 50cm, the spraying time is 15 seconds, and the oven drying temperature is 40 ℃.
7. The method for manufacturing a porous ceramic disc household fluorine removal water purifier as claimed in claim 2, wherein the silver-cerium co-doped nano titanium dioxide dispersion liquid in the step (2) is prepared by: mixing nano titanium dioxide with silver nitrate and 2-propanol, dissolving the mixture into 500mL of deionized water, placing the mixture in a quartz container, magnetically stirring the mixture for 1h, irradiating the mixture in a black box for 1h by using a 125W high-pressure mercury lamp, standing the mixture in the dark place for 6h, adding a cerium nitrate solution with the mass fraction of 0.6%, placing the mixture in a reaction kettle for reaction, washing and drying the mixture to obtain silver-cerium co-doped nano titanium dioxide powder, dispersing the obtained powder in titanium dioxide dispersion, ultrasonically treating the mixture for 1h by ultrasonic waves, and magnetically stirring the mixture for 1h to obtain the modified nano titanium dioxide dispersion.
8. The method of claim 7, wherein the nano titanium dioxide is present in an amount of 2 to 3% by mass, silver is present in an amount of 0.5 to 2% by mass relative to titanium dioxide, and cerium is present in an amount of 0.5 to 1.5% by mass relative to titanium dioxide.
9. The method as claimed in claim 7, wherein the reaction temperature in the reaction kettle is 180-200 ℃ and the reaction time is 24 hours.
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| CN103693796A (en) * | 2013-12-22 | 2014-04-02 | 吉林大学 | Rural miniature drinking water fluoride removal device |
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| CN203333424U (en) * | 2013-06-11 | 2013-12-11 | 台州创兴环保科技有限公司 | Improved rural integrated household water purifier |
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