CN112537928A - Nickel and phosphorus removal composite porous functional filter material and preparation method thereof - Google Patents
Nickel and phosphorus removal composite porous functional filter material and preparation method thereof Download PDFInfo
- Publication number
- CN112537928A CN112537928A CN202011357487.0A CN202011357487A CN112537928A CN 112537928 A CN112537928 A CN 112537928A CN 202011357487 A CN202011357487 A CN 202011357487A CN 112537928 A CN112537928 A CN 112537928A
- Authority
- CN
- China
- Prior art keywords
- filter material
- nickel
- balling
- water
- phosphorus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2101/105—Phosphorus 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention provides a nickel and phosphorus removal composite porous functional filter material and a preparation method thereof, wherein the filter material is prepared from metakaolin: diatomite: cement: sodium silicate = (50-70): (10-20): (10-30): and (1) mixing the components according to the mass percentage, adding a proper amount of water, uniformly stirring, pouring the mixture into a balling disc for balling to prepare spherical particles with the required particle size, and naturally curing the spherical particles at room temperature for 24 hours and then performing autoclaved curing. The method has the production advantages of simple operation, simple flow, low energy consumption and the like, and the ceramsite filter material has developed pores, certain functionality, namely alkali precipitation, calcium release and ion exchange performance, can continuously and stably remove phosphorus and nickel pollutants in wastewater, and has good application prospect in sewage treatment.
Description
Technical Field
The invention relates to a porous functional silicate ceramsite filter material, in particular to a filter material which has alkali supply and calcium release properties and can remove phosphorus and nickel pollutants in wastewater, belonging to the field of preparation of filter materials for environmental water treatment.
Background
With the development of industry, the discharge amount of wastewater is continuously increased, the wastewater contains a large amount of phosphorus pollutants, a large amount of water eutrophication can be caused, and the water eutrophication can cause excessive propagation of aquatic plants and poison a large amount of aquatic organisms. The conventional phosphorus removal method is to add chemical agents to generate precipitation removal, so that the discharge amount of urban sewage is large, a large amount of chemical agents are consumed, the operation cost is high, and a large amount of sludge is generated, so that a novel filter material with good phosphorus removal performance can be developed. Excessive nickel in water can not only pollute soil, but also harm human health, and heavy metals can not be biodegraded after entering the environment. The most common treatment method is a neutralization precipitation method, which adjusts the pH value of the wastewater to precipitate nickel ions by adding an alkaline agent, but the method causes the problem that the pH value of the produced water is higher, the discharged water can be neutralized and secondary pollution is easily caused.
Disclosure of Invention
The invention aims to provide a nickel and phosphorus removal composite porous functional filter material and a preparation method thereof.
The technical solution for realizing the invention is as follows: a composite porous functional filter material for removing nickel and phosphorus and a preparation method thereof, wherein the filter material is a porous ceramsite filter material taking calcium silicate hydrate, tobermorite and the like as main mineral phases, and the preparation method comprises the following steps:
firstly, mixing 50-70% of metakaolin, 10-20% of diatomite, 10-30% of cement and 1-5% of sodium silicate by mass percent of filter material, adding a proper amount of balling water, and uniformly stirring;
secondly, granulating and balling in a balling disc, wherein the grain size of a filter material is controlled to be 3-8 mm;
thirdly, natural curing is carried out for 24 hours at room temperature;
fourthly, carrying out autoclaved curing in an autoclave, heating from room temperature to 180 ℃ within 3h, preserving heat for 10h, and finally cooling to room temperature within 2 h.
Preferably, the balling water accounts for 20-24% of the total mass of the filter material.
Preferably, the cement is 52.5 ordinary portland cement.
Preferably, the sodium silicate has a modulus of 1.0.
Preferably, the metakaolin and the diatomite are powders with the particle size of more than 150 meshes.
An application of a porous functional filter material in treating phosphorus-containing or nickel-containing pollutants in sewage.
Compared with the prior art, the invention has the following remarkable advantages:
(1) the raw materials have wide sources, low price and low production cost, and the hydrothermal synthesis technology is adopted to replace the traditional sintering technology, so that the energy consumption is low, the preparation process is simple, and the production equipment is mature;
(2) the prepared filter material has the functions of supplying alkali and releasing calcium, namely, calcium ions and hydroxyl ions are stably released in water for a long time, so that the water body keeps the alkaline atmosphere and is controllable, and the addition of alkaline reagents and other chemical agents can be reduced in sewage treatment;
(3) the prepared filter material is rough and porous, has large specific surface area, is suitable for the growth of microorganisms, and has good adsorption performance and ion exchange performance;
(4) the filter material prepared by the invention has good dephosphorization effect, the removal rate of 30-50mg/L of total phosphorus in inlet water reaches about 91%, the quality of outlet water is good, and the filter material is suitable for dephosphorization systems of municipal sewage, industrial sewage and artificial wetland; the filter material prepared by the invention has ion exchange characteristic, has excellent effect of removing nickel heavy metal pollutants in sewage, and has a removal rate of 99% for 100 plus-500 mg/L nickel-containing sewage (calculated by nickel ions). The ion exchange characteristic of the filter material can also remove heavy metal ions such as zinc, cadmium, chromium, mercury, lead and the like.
Drawings
FIG. 1 is a schematic view of the preparation process of the porous functional filter material of the present invention.
Fig. 2 is an XRD pattern of the porous filter material prepared in example 1 of the present invention.
Detailed Description
The preparation process and the application result of the present invention are further illustrated by the following examples.
The principle of the invention is as follows:
1. the invention adopts a balling disc rolling balling method, and the metakaolin has clay plasticity, so that the filter material is easy to be balling and not easy to be damaged; metakaolin has pozzolanic activity, its active Al2O3And SiO2Ca (OH) produced by rapid hydration with cement2Reaction to produce a large amount of calcium silicate hydrate (CaO-SiO) with poor C-S-H (B) -crystallization under the autoclave condition2-H2O), tobermorite (5 CaO.6SiO)2·5H2O)), and the like, and the strength of the filter material is enhanced, and the cement can be hydrated to generate a large amount of C-S-H gel, so that the ball blank is easy to form, the initial strength of the ball is high, the ball forming efficiency is improved, and the damage rate of the filter material blank in the transportation process of each production section is reduced.
2. The main component of the diatomite is amorphous SiO2Under hydrothermal conditions, the filter material forms nano porous hydrated calcium silicate and nano porous tobermorite in situ in the diatom disc, so that the pores of the filter material are developed, the specific surface area is increased, and the adsorption performance of the filter material is improved.
3. Metakaolin-cement-diatomite belongs to CaO-SiO2-Al2O3-H2And the metakaolin is an anhydrous aluminum silicate material formed by high-temperature dehydration of kaolin, has irregular molecular arrangement, presents a thermodynamic metastable state and has a gelling property under proper excitation. Under the steam pressure of 0.5-1.5MPa and the steam curing temperature of 125-. The hydration products C-S-H (B) and tobermorite of the ceramsite filter material can be hydrolyzed to release Ca2+And the water body is maintained in an alkaline atmosphere, Ca is added in the alkaline atmosphere2+And PO4 3-Or OH-And Ni2+The combination forms a precipitate which is absorbed and retained by ceramsite, see formulas (a) and (b), and good phosphorus and nickel removal effects are achieved;
4. in CaO-SiO2-Al2O3-H2In the O system, Al can be caused to be present by controlling the reaction conditions3+Substituting Si in tobermorite4+Producing tobermorite (Al-TOB), Al3+By substitution of Si in Toro C-S-H (B)4+Production of calcium silicate hydrate in aluminium strip [ Al-CSH (B)]，Al3+Substituted Si4+Formation of substitutional solid solution to maintain electroneutrality, 1 oxygen ion O appears in the structure2-Vacancy (V)·· O) See formula (c); when Na is present in the solution+Equi-cation of Al3+Substituted Si4+Causing charge depletion through Na+The ions are interstitial, see formula (d). However, Al3+Substituted Si4+The reaction of silicon-oxygen tetrahedron is difficult to carry out, and the invention adds sodium silicate as a reaction catalyst, thereby not only improving Al3+Substituted Si4+Enter into the silicon-oxygen tetrahedron reaction rate and provide a large amount of Na+And carrying out gap filling to achieve the electricity price balance. Produce hydration phases such as the alumina-substituted tobermorite, the alumina-substituted calcium silicate hydrate and the like, and the hydration phases have stronger ion exchange capacity and can adsorb Ni in the solution2+The heavy metal ions are shown in formula (e) to achieve the high-efficiency removal of nickel.
Ca2++PO4 3-→Ca3(PO4)2↓ (a)
Ni2++2OH-→Ni(OH)2↓ (b)
In the formula (d):
represents Na+And (6) gap filling.
The raw materials 52.5 Portland cement, metakaolin and diatomite mentioned in the following examples are all commercially available products, and the specific chemical compositions are shown in Table 1, it should be noted that the raw materials of the present invention need not be specially required and limited, and the chemical compositions are not limited by Table 1.
TABLE 1 chemical composition content (wt%) of raw materials for preparing porous functional Filter Material
Example 1: with reference to fig. 1, the preparation process of the nickel and phosphorus removal composite porous functional filter material of the invention is as follows:
firstly, grinding metakaolin and diatomite powder into powder with the particle size of more than 150 meshes;
step two, according to the proportion of metakaolin: diatomite: cement: sodium silicate 66 kg: 15 kg: 15 kg: mixing 4kg of sodium silicate with the modulus of 1.0, adding 22kg of balling water, and uniformly stirring;
thirdly, granulating and balling in a balling disc, wherein the grain diameter of a filter material is 3-8 mm;
fourthly, natural curing is carried out for 24 hours at room temperature;
fifthly, carrying out autoclaved curing in an autoclave, heating the autoclave from room temperature for 3h to 180 ℃, preserving heat for 10h, and finally cooling the product for 2h to room temperature.
The XRD of the prepared porous filter material is shown in figure 2, the main phases of the hydrothermal synthesis filter material, namely Quartz (Q-Quartz) and aluminum-substituted Tobermorite (AT-Al-Tobermorite), are as shown in the figure, and the diffraction peak broadening and background increasing in the range of 25-30 in the XRD map indicate that a C-S-H (B) phase exists.
The bulk density of the ceramsite filter material is 1001kg/m3The apparent density is 1.632g/cm3The cylinder pressure strength is 16.86MPa, the water absorption rate in 24 hours is 19.1 percent, and the specific surface area is 19.3m2The percentage of the wear resistance is 99.9 percent, the mud content is 0.837 percent, and the sum of the wear rate and the breakage rate is 0.015 percent. After the filter material is contacted with water for 8 hours (the adding amount of the filter material is 30g/L), the hydrolysis of the filter material reaches balance, the pH of the solution reaches 10.3, and Ca is released2+The concentration was 20.5 mg/L. The multifunctional filter material is filled in a filter tank with the diameter of 1000mm and the height of 1000mm, the filling volume of the filter material accounts for about 60 percent of the volume of the whole filter tank, water is fed in an upward flow mode, and the hydraulic retention time of the filter tank is set to be 480 min. The simulated phosphorus-containing wastewater is prepared by adopting monopotassium phosphate, the average concentration of total phosphorus in inlet water is 30mg/L, the average concentration of total phosphorus in treated outlet water is 2.88mg/L, the total phosphorus removal rate reaches 90.4%, and the removal rate is still stabilized at about 90% after the wastewater runs for 40 days. Nickel chloride hexahydrate is adopted to simulate nickel-containing wastewater, the average concentration of total nickel in inlet water is 100mg/L (calculated by nickel ions), the water quality of outlet water is detected every day, the average concentration of nickel ions in the outlet water after treatment is 0.9mg/L, the removal rate of the nickel ions reaches 99.1%, and the water quality of the outlet water meets the first-level standard (1.0mg/L) of the comprehensive sewage discharge standard.
Example 2: with reference to fig. 1, the preparation process of the nickel and phosphorus removal composite porous functional filter material of the invention is as follows:
firstly, grinding metakaolin and diatomite powder into powder with the particle size of more than 150 meshes;
step two, according to the proportion of metakaolin: diatomite: cement: sodium silicate 62 kg: 20kg of: 15 kg: 3kg of sodium silicate is mixed, wherein the modulus of the sodium silicate is 1.0, and 23kg of balling water is added and stirred uniformly;
thirdly, granulating and balling in a balling disc, wherein the grain diameter of a filter material is 3-8 mm;
fourthly, natural curing is carried out for 24 hours at room temperature;
fifthly, carrying out autoclaved curing in an autoclave, heating the autoclave from room temperature for 3h to 180 ℃, preserving heat for 10h, and finally cooling the product for 2h to room temperature.
The bulk density of the ceramsite filter material is 921kg/m3The apparent density is 1.543g/cm3The cylinder pressure strength is 15.07MPa, the water absorption rate in 24 hours is 20.3 percent, and the specific surface area is 20.5m2The percentage of the wear resistance is 99.6 percent, the mud content is 0.875 percent, and the sum of the wear rate and the damage rate is 0.028 percent. After the filter material is contacted with water for 8 hours (the adding amount of the filter material is 5g/200mL), the hydrolysis of the filter material reaches balance, the pH of the solution reaches 10.7, and Ca is released2+The concentration was 25.7 mg/L. The multifunctional filter material is filled in a filter tank with the diameter of 1000mm and the height of 1000mm, the filling volume of the filter material accounts for about 60 percent of the volume of the whole filter tank, water is fed in an upward flow mode, and the hydraulic retention time of the filter tank is set to be 480 min. The simulated phosphorus-containing wastewater is prepared by adopting monopotassium phosphate, the average concentration of total phosphorus in inlet water is 30mg/L, the average concentration of total phosphorus in treated outlet water is 2.28mg/L, the total phosphorus removal rate reaches 92.4%, and the removal rate is still stabilized at about 92% after the wastewater runs for 40 days. Nickel chloride hexahydrate is adopted to simulate nickel-containing wastewater, the average concentration of total nickel in inlet water is 300mg/L (calculated by nickel ions), the water quality of outlet water is detected every day, the average concentration of nickel ions in the outlet water after treatment is 3.0mg/L, the nickel ion removal rate reaches 99.0%, and the nickel removal rate fluctuates between 98% and 99% after operation for 40 days.
Example 3: with reference to fig. 1, the preparation process of the nickel and phosphorus removal composite porous functional filter material of the invention is as follows:
firstly, grinding metakaolin and diatomite powder into powder with the particle size of more than 150 meshes;
step two, according to the proportion of metakaolin: diatomite: cement: sodium silicate 58 kg: 20kg of: 20kg of: 2kg of sodium silicate is mixed, wherein the modulus of the sodium silicate is 1.0, and 23kg of balling water is added and stirred uniformly;
thirdly, granulating and balling in a balling disc, wherein the grain diameter of a filter material is 3-8 mm;
fourthly, natural curing is carried out for 24 hours at room temperature;
fifthly, carrying out autoclaved curing in an autoclave, heating the autoclave from room temperature for 3h to 180 ℃, preserving heat for 10h, and finally cooling the product for 2h to room temperature.
The bulk density of the ceramsite filter material is 903kg/m3The apparent density is 1.509g/cm3The cylinder pressure strength is 14.29MPa, the water absorption rate in 24 hours is 22.4 percent, and the specific surface area is 21.9m2Per g, the alkalinity resistance is 99.7 percent, the mud content is 0.816 percent, and the sum of the wear rate and the breakage rate is 0.019 percent. After the filter material is contacted with water for 8 hours (the adding amount of the filter material is 5g/200mL), the filter material is hydrolyzed to reach the pH value of an equilibrium solution of 10.6, and Ca is released2+The concentration was 34.7 mg/L. The multifunctional filter material is filled in a filter tank with the diameter of 1000mm and the height of 1000mm, the filling volume of the filter material accounts for about 60 percent of the volume of the whole filter tank, water is fed in an upward flow mode, and the hydraulic retention time of the filter tank is set to be 480 min. The simulated phosphorus-containing wastewater is prepared by adopting monopotassium phosphate, the average concentration of total phosphorus in inlet water is 30mg/L, the average concentration of total phosphorus in treated outlet water is 2.58mg/L, the total phosphorus removal rate reaches 91.4%, and the removal rate is still stabilized at about 91% after the wastewater runs for 40 days. Nickel chloride hexahydrate is adopted to simulate nickel-containing wastewater, the average concentration of total nickel in inlet water is 400mg/L (calculated by nickel ions), the water quality of outlet water is detected every day, the average concentration of nickel ions in the outlet water after treatment is 3.6mg/L, the nickel ion removal rate reaches 99.1%, and the nickel removal rate fluctuates between 98 and 99% after operation for 40 days.
Example 4: with reference to fig. 1, the preparation process of the nickel and phosphorus removal composite porous functional filter material of the invention is as follows:
firstly, grinding metakaolin and diatomite powder into powder with the particle size of more than 150 meshes;
step two, according to the proportion of metakaolin: diatomite: cement: sodium silicate 49 kg: 30 kg: 20kg of: mixing 1kg of sodium silicate with the modulus of 1.0, adding 24kg of balling water, and uniformly stirring;
thirdly, granulating and balling in a balling disc, wherein the grain diameter of a filter material is 3-8 mm;
fourthly, natural curing is carried out for 24 hours at room temperature;
fifthly, carrying out autoclaved curing in an autoclave, heating the autoclave from room temperature for 3h to 180 ℃, preserving heat for 10h, and finally cooling the product for 2h to room temperature.
The bulk density of the ceramsite filter material is 847kg/m3The apparent density is 1.383g/cm3The cylinder pressure strength is 12.47MPa, the water absorption rate in 24 hours is 27.6 percent, and the specific surface area is 23.7m2Per g, the alkalinity resistance is 99.8 percent, the mud content is 0.839 percent, and the sum of the wear rate and the breakage rate is 0.031 percent. After the filter material is contacted with water for 8 hours (the adding amount of the filter material is 5g/200mL), the hydrolysis of the filter material reaches balance, the pH of the solution reaches 10.8, and Ca is released2+The concentration was 38.6 mg/L. The multifunctional filter material is filled in a filter tank with the diameter of 1000mm and the height of 1000mm, the filling volume of the filter material accounts for about 60 percent of the volume of the whole filter tank, water is fed in an upward flow mode, and the hydraulic retention time of the filter tank is set to be 480 min. The simulated phosphorus-containing wastewater is prepared by adopting monopotassium phosphate, the average concentration of total phosphorus in inlet water is 50mg/L, the average concentration of total phosphorus in treated outlet water is 3.80mg/L, the total phosphorus removal rate reaches 92.4%, and the removal rate is still stabilized at about 92% after the wastewater runs for 50 days. Nickel chloride hexahydrate is adopted to simulate nickel-containing wastewater, the average concentration of total nickel in inlet water is 500mg/L (calculated by nickel ions), the water quality of outlet water is detected every day, the average concentration of nickel ions in the outlet water after treatment is 3.50mg/L, the nickel ion removal rate reaches 99.3%, and the nickel removal rate fluctuates between 98 and 99% after operation for 40 days.
As shown in the above examples, the filter material of the invention has a large specific surface area (16-24 m)2Per g), pore volume of 0.08-0.095m3(g), enough space for microbial growth is increased, adsorption capacity is strong, and releasable Ca is released after the filter material is contacted with water for 12 hours (the adding amount is 30g/L)2+The concentration is 20-40 mg/L, the pH range is kept at 9.7-11.0, and the hydrate aluminum-substituted tobermorite has good adsorption performance and ion exchange performance, so that phosphorus and nickel pollutants in water can be stably and efficiently removed, the effluent water quality is good, and meanwhile, the material is environment-friendly and can be recycled, and the problem of secondary pollution is avoided.
Claims (8)
1. A preparation method of a composite porous functional filter material for removing nickel and phosphorus is characterized by comprising the following steps:
firstly, mixing 50-70% of metakaolin, 10-20% of diatomite, 10-30% of cement and 1-5% of sodium silicate by mass percent of filter material, adding a proper amount of balling water, and uniformly stirring;
secondly, granulating and balling in a balling disc, wherein the grain size of a filter material is controlled to be 3-8 mm;
thirdly, natural curing is carried out for 24 hours at room temperature;
fourthly, carrying out autoclaved curing in an autoclave, heating from room temperature to 180 ℃ within 3h, preserving heat for 10h, and finally cooling to room temperature within 2 h.
2. The method of claim 1, wherein the balling water is 20-24% of the total mass of the filter material.
3. The method of claim 1, wherein the cement is 52.5 Portland cement.
4. The method of claim 1, wherein the sodium silicate has a modulus of 1.0.
5. The method according to claim 1, wherein the metakaolin and the diatomaceous earth are powders having a particle size of 150 mesh or more.
6. The composite porous functional filter material for removing nickel and phosphorus prepared by the method of any one of claims 1 to 5.
7. The filter material of claim 6, wherein the filter material is a porous ceramsite filter material having calcium silicate hydrate and tobermorite as main mineral phases.
8. The nickel and phosphorus removal composite porous functional filter material prepared by the method of any one of claims 1 to 5 is applied to treatment of wastewater containing phosphorus or nickel ions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011357487.0A CN112537928B (en) | 2020-11-27 | 2020-11-27 | Nickel and phosphorus removal composite porous functional filter material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011357487.0A CN112537928B (en) | 2020-11-27 | 2020-11-27 | Nickel and phosphorus removal composite porous functional filter material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112537928A true CN112537928A (en) | 2021-03-23 |
| CN112537928B CN112537928B (en) | 2023-01-06 |
Family
ID=75015233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011357487.0A Active CN112537928B (en) | 2020-11-27 | 2020-11-27 | Nickel and phosphorus removal composite porous functional filter material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112537928B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114958381A (en) * | 2022-06-22 | 2022-08-30 | 南京理工大学 | Mineral soil treatment agent with cadmium and lead removal functions |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935195A (en) * | 2010-09-01 | 2011-01-05 | 郑俊 | Porous phosphorus removing ceramic granules with function of slowly releasing alkali and preparation method thereof |
| CN106495182A (en) * | 2016-10-27 | 2017-03-15 | 湖南理工学院 | A kind of preparation method of zeolite L molecular sieve |
| CN107971003A (en) * | 2016-10-21 | 2018-05-01 | 中国石油化工股份有限公司 | It is a kind of to contain phosphorous and assistant for calalytic cracking of Beta molecular sieves of carried metal and preparation method thereof |
| CN109225126A (en) * | 2018-10-29 | 2019-01-18 | 云南兆泓环境工程有限公司 | A kind of porous phosphorus removing filtrate and preparation method thereof based on diatomite and tripoli |
-
2020
- 2020-11-27 CN CN202011357487.0A patent/CN112537928B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935195A (en) * | 2010-09-01 | 2011-01-05 | 郑俊 | Porous phosphorus removing ceramic granules with function of slowly releasing alkali and preparation method thereof |
| CN107971003A (en) * | 2016-10-21 | 2018-05-01 | 中国石油化工股份有限公司 | It is a kind of to contain phosphorous and assistant for calalytic cracking of Beta molecular sieves of carried metal and preparation method thereof |
| CN106495182A (en) * | 2016-10-27 | 2017-03-15 | 湖南理工学院 | A kind of preparation method of zeolite L molecular sieve |
| CN109225126A (en) * | 2018-10-29 | 2019-01-18 | 云南兆泓环境工程有限公司 | A kind of porous phosphorus removing filtrate and preparation method thereof based on diatomite and tripoli |
Non-Patent Citations (5)
| Title |
|---|
| DANIEL HÖLLEN等: ""Hydrothermal Alteration of Diatomite for Removal of Aqueous Cu2+, Pb2+ and Zn2+"", 《JOURNAL OF MATERIALS SCIENCE AND ENGINEERING B》 * |
| YUANYUAN GE等: ""Preparation of geopolymer-based inorganic membrane for removing Ni2+ from wastewater"", 《JOURNAL OF HAZARDOUS MATERIALS》 * |
| 杨敬杰等: ""脱铝粉煤灰水热法合成 1.1 nm 铝代托贝莫来石"", 《JOURNAL OF THE CHINESE CERAMIC SOCIETY》 * |
| 白春华著: "《非金属矿物基二氧化钛制备、改性及废水处理技术》", 31 December 2015 * |
| 郑俊等: ""多孔水泥石合成滤料的制备及其污水吸附除磷试验研究"", 《土木建筑与环境工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114958381A (en) * | 2022-06-22 | 2022-08-30 | 南京理工大学 | Mineral soil treatment agent with cadmium and lead removal functions |
| CN114958381B (en) * | 2022-06-22 | 2024-02-02 | 南京理工大学 | Mineral soil treatment agent with cadmium and lead removal function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112537928B (en) | 2023-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gao et al. | Preparation of a new low-cost substrate prepared from drinking water treatment sludge (DWTS)/bentonite/zeolite/fly ash for rapid phosphorus removal in constructed wetlands | |
| Fang et al. | Evaluation of porous calcium silicate hydrate derived from carbide slag for removing phosphate from wastewater | |
| Panda et al. | Heavy metal removal from water by adsorption using a low-cost geopolymer | |
| CN101935195B (en) | Porous phosphorus removing ceramic granules with function of slowly releasing alkali and preparation method thereof | |
| KR100405474B1 (en) | adsorbent for water treatment | |
| CN101774669B (en) | Composite dephosphorizing agent for treating acidic wastewater containing phosphorus and preparation and application methods thereof | |
| Zhang et al. | Solidification/stabilization of landfill leachate concentrate contaminants using solid alkali-activated geopolymers with a high liquid solid ratio and fixing rate | |
| CN108706604A (en) | A kind of wet method prepares method for preparation of modified bentonite | |
| CN103910503A (en) | Curing sintering-free granulation method for sludge | |
| CN114163176B (en) | Sintering-free raw material ball filler for rural sewage treatment system, and preparation and maintenance methods thereof | |
| CN102115234A (en) | Preparation method of flocculant capable of removing phosphate from red mud | |
| CN112479647B (en) | Composite autoclaved porous zeolite filter material with manganese and phosphorus removal functions and preparation method thereof | |
| CN107758823B (en) | Domestic sewage treatment agent and preparation method thereof | |
| CN112537928B (en) | Nickel and phosphorus removal composite porous functional filter material and preparation method thereof | |
| CN109231842A (en) | A kind of foamed glass material and preparation method thereof reducing water quality total phosphorus index | |
| CN113398875A (en) | Preparation method and application of fly ash-based multifunctional adsorbent | |
| CN113044963A (en) | Active biological filter material and preparation method and application thereof | |
| CN105126740B (en) | A kind of BIOLOGICAL CALCIUM type Phosphateadsorption porous material and preparation method thereof | |
| CN110252240B (en) | Method for preparing phosphorus-containing wastewater adsorbent by roasting aluminum-containing waste residue and application of phosphorus-containing wastewater adsorbent | |
| CN117185691B (en) | Method for regenerating baking-free artificial lightweight aggregate by cooperatively disposing aluminum ash and garbage incineration fly ash | |
| JP4827045B2 (en) | Water purification material and method for producing water purification material | |
| CN113000025A (en) | Phosphorus removal adsorbent and preparation method and application thereof | |
| CN116282547A (en) | Molecular sieve functional filler for denitrification and dephosphorization of subsurface flow constructed wetland | |
| KR20120105773A (en) | The binder composition using the main stuff for soil | |
| CN112441805B (en) | Method for preparing enhanced phosphorus removal and COD filter material by using ferrate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |