CN111644154A - Phosphorus removal material and preparation method and application thereof - Google Patents
Phosphorus removal material and preparation method and application thereof Download PDFInfo
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- CN111644154A CN111644154A CN202010467533.6A CN202010467533A CN111644154A CN 111644154 A CN111644154 A CN 111644154A CN 202010467533 A CN202010467533 A CN 202010467533A CN 111644154 A CN111644154 A CN 111644154A
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- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 106
- 239000011574 phosphorus Substances 0.000 title claims abstract description 106
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 239000000463 material Substances 0.000 title claims abstract description 84
- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000001035 drying Methods 0.000 claims abstract description 30
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 28
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 24
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 24
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 239000004471 Glycine Substances 0.000 claims abstract description 15
- 238000005303 weighing Methods 0.000 claims abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 238000007873 sieving Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 11
- 238000001354 calcination Methods 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000004065 wastewater treatment Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 15
- 230000009286 beneficial effect Effects 0.000 description 13
- 239000010865 sewage Substances 0.000 description 12
- 239000000047 product Substances 0.000 description 9
- 239000011575 calcium Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- 239000005909 Kieselgur Substances 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 5
- 150000002736 metal compounds Chemical class 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000010170 biological method Methods 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium chloride Substances Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 1
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
-
- 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
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
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- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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Abstract
The invention relates to a phosphorus removal material and a preparation method and application thereof, belonging to the technical field of water treatment. The preparation method comprises the following steps: weighing 200g of diatomite, adding 30% sulfuric acid by volume concentration until the diatomite is submerged, adding water for washing after no bubbles are generated, standing for layering, taking a lower layer substance, drying to constant weight, grinding and sieving, and then calcining to obtain the original diatomite; weighing 2.4g of glycine, 8g of calcium hydroxide and 6g of original diatomite, adding water until the glycine, the calcium hydroxide and the original diatomite are submerged, uniformly stirring, performing ultrasonic treatment to obtain a mixture, taking out the mixture, drying the mixture to constant weight, grinding and sieving to obtain the phosphorus removal material. The invention also discloses the phosphorus removal material prepared by the preparation method and application thereof. The preparation method has the advantages that the preparation process is simple, large-scale popularization and application are facilitated, and the phosphorus removal rate of the prepared phosphorus removal material is high and is slightly influenced by the pH value.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a phosphorus removal material as well as a preparation method and application thereof.
Background
Diatomite, a scientific name of amorphous silicon dioxide, is a siliceous rock and is abundant in China. Diatomite has the characteristics of large specific surface area, strong adsorbability, stable chemical property and the like, and is also increasingly applied to the field of water treatment at present.
The wastewater discharge amount of China is increased by about 70 percent from 2000 to 2013. By 2015, only 5364 sewage treatment plants in China have daily treatment capacity of about 1.7 hundred million/d, and the wastewater treatment capacity is very weak, which means that more economical and rapid treatment methods are needed.
The existing phosphorus removal method mainly comprises a biological method, a chemical method, an adsorption method and the like. But traditional biological methods are far from meeting the increasing demand for wastewater treatment. The chemical method has the advantages of low cost, obvious and stable effect, simple treatment technology and the like, and is used in more actual projects. At present, chemical phosphorus removal mainly comprises adding Fe3+、Al3+And calcium hydroxide. However, the effect of phosphorus removal depends on the amount of calcium hydroxide to be added, and if the amount of calcium hydroxide to be added is too large, Fe is contained in the case where the solution pH is alkaline3+And Al3+Can react with OH in water-Reaction to produce Fe (OH)3Precipitation and Al (OH)3Precipitating and adding Al3+It is also toxic to human body and increases the cost of sewage treatment. The adsorption method mainly adopts activated carbon for adsorption, but the adsorption capacity of the activated carbon is limited, and the method cannot meet more and more wastewater treatment requirements.
Disclosure of Invention
The invention provides a phosphorus removal material, a preparation method and application thereof for solving the technical problems.
The invention provides a preparation method of a phosphorus removal material for solving the technical problems.
The technical scheme for solving the technical problems is as follows: a preparation method of a phosphorus removal material comprises the following steps:
s1, preparation of raw diatomite:
weighing 200g of diatomite, adding 30% sulfuric acid by volume concentration until the diatomite is submerged, adding water for washing after no bubbles are generated, standing for layering, taking a lower layer substance, drying to constant weight, grinding and sieving, and then calcining to obtain the original diatomite;
s2, preparation of a phosphorus removal material:
weighing 2.4g of glycine, 8g of calcium hydroxide and 6g of raw diatomite prepared in the step S1, adding water until the glycine, the calcium hydroxide and the raw diatomite are submerged, uniformly stirring, performing ultrasonic treatment to obtain a mixture, taking out, drying to constant weight, grinding and sieving to obtain the phosphorus removal material.
The preparation method has the beneficial effects that: (1) the preparation process is simple, does not need to carry out complicated steps, is easy to operate and is beneficial to large-scale popularization and application;
(2) the phosphorus removal material, Ca, prepared by the preparation method2+The diatomite is well loaded, so that the prepared phosphorus removal material has high yield;
(3) the diatomite is adopted to prepare the phosphorus removal material, so that the raw material cost is low, the overall manufacturing cost is low, and the phosphorus removal rate of the prepared phosphorus removal material is high and can reach 97% to the maximum;
(4) the phosphorus removal material prepared by the preparation method has little pollution to the environment, is beneficial to large-scale sewage treatment, can treat domestic sewage and industrial wastewater, and is beneficial to environmental protection.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, in step S1, the specific method for removing the lower layer material is:
pouring out clear water on the upper layer obtained after standing and layering, adding 400ml of sulfuric acid with the volume concentration of 30% into the lower layer, adding water for washing, standing and layering for 3 times, and taking out the lower layer.
The beneficial effect of adopting the further scheme is that: the method is favorable for fully removing impurities in the diatomite and improving the quality of finished products.
Further, the mesh number of the screen is 200 meshes in step S1.
The beneficial effect of adopting the further scheme is that: impurities are removed, the quality of the finished product is improved, and the phosphorus removal effect of the prepared phosphorus removal material is better.
Further, the temperature of the calcination in step S1 was 400 ℃ for 2 hours.
The beneficial effect of adopting the further scheme is that: the calcination effect is good, and the intermediate raw diatomite is favorably obtained.
Further, the temperature of the drying is 80 to 90 ℃ in step S1.
The beneficial effect of adopting the further scheme is that: the drying effect is good, and simultaneously, the influence on the diatomite is avoided.
Further, the power of the ultrasound is 40kHz and the time is 30min in step S2.
The beneficial effect of adopting the further scheme is that: so that the calcium hydroxide and the original diatomite are uniformly mixed.
Further, the mesh number of the screen is 200 meshes in step S2.
The beneficial effect of adopting the further scheme is that: impurities are removed, the quality of the finished product is improved, and the phosphorus removal effect of the prepared phosphorus removal material is better.
Further, the temperature of the drying is 80 to 90 ℃ in step S2.
The beneficial effect of adopting the further scheme is that: the drying effect is good, and simultaneously, the influence on the diatomite is avoided.
Secondly, the invention provides a phosphorus removal material for solving the technical problems.
The technical scheme for solving the technical problems is as follows: a dephosphorization material prepared by the preparation method.
The phosphorus removal material has the beneficial effects that: (1) the phosphorus removal material has good phosphorus removal effect, and the maximum removal rate is about 97%;
(2) the phosphorus removal material has better phosphorus treatment effect than the existing phosphorus treatment material added with calcium hydroxide under the condition of less input amount;
(3) compared with the phosphorus removal of metal compounds, the phosphorus removal material has lower cost, does not cause the increase of metal elements in water, and can be applied to large-scale practical engineering;
(4) the phosphorus removal material can not only treat phosphorus in domestic sewage, but also treat high-phosphorus wastewater generated in mining and industrial production.
Thirdly, the invention provides an application of the dephosphorization material for solving the technical problems.
The technical scheme for solving the technical problems is as follows: a sewage treatment agent comprises the phosphorus removal material.
The application has the beneficial effects that: can well treat sewage or waste water, saves water resources and protects the environment.
Drawings
FIG. 1 is an XRD pattern of raw diatomaceous earth in Experimental example 1 of the present invention;
FIG. 2 is an XRD pattern of the phosphorus removal material prepared in example 1 in the experimental example 1 of the present invention;
FIG. 3 is an electron microscope scanning image of original diatomaceous earth in Experimental example 3 of the present invention;
FIG. 4 is a partially enlarged view of an electron microscope scanning image of original diatomite in experimental example 3 of the present invention;
FIG. 5 is an energy spectrum of raw diatomaceous earth in Experimental example 3 of the present invention;
FIG. 6 is an electron microscope scanning image of the phosphorous removal material prepared in example 1 in Experimental example 3 of the present invention;
FIG. 7 is a partial enlarged view of an electron microscope scanning picture of the phosphorus removal material prepared in example 1 in Experimental example 3 of the present invention;
FIG. 8 is an energy spectrum of the phosphorus removal material prepared in example 1 in Experimental example 3 of the present invention;
FIG. 9 is a graph showing the relationship between the pH value and the removal rate of the phosphorus removal material prepared in example 1 in Experimental example 3 of the present invention;
FIG. 10 is a graph showing the relationship between the temperature and the removal rate of the phosphorus removal material prepared in example 1 in Experimental example 3 of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example 1
The embodiment provides a preparation method of a phosphorus removal material, which comprises the following steps:
s1, preparation of raw diatomite:
weighing 200g of diatomite, putting the diatomite into a 500ml beaker, adding 30% dilute sulfuric acid by volume concentration until the diatomite is submerged, reacting the dilute sulfuric acid with impurities in the diatomite to generate bubbles, adding water for washing after no bubbles are generated, standing for layering, pouring out upper clear water, adding 400ml of 30% sulfuric acid, adding water for washing, standing for layering, repeating the operation for 3 times, taking down the layered product, putting the layered product into a drying box, drying at 80 ℃ to constant weight, grinding after drying, sieving by using a 200-mesh sieve, and calcining for 2 hours at 400 ℃ to obtain the original diatomite.
S2, preparation of a phosphorus removal material:
weighing 2.4g of glycine, 8g of calcium hydroxide and 6g of raw diatomite prepared in the step S1, putting the glycine, the calcium hydroxide and the raw diatomite into a beaker, adding water until the glycine, the calcium hydroxide and the raw diatomite are submerged, uniformly stirring by using a glass rod, carrying out ultrasonic treatment for 30 minutes with the output of 70w and the power of 40kHz to obtain a fully mixed mixture, taking out the mixture, putting the mixture into a drying box, drying the mixture to constant weight at 80 ℃, grinding the mixture after drying, and sieving the mixture by using a 200-mesh sieve to obtain the phosphorus removal material.
The embodiment also provides a phosphorus removal material prepared by the preparation method.
The embodiment also provides a sewage treatment agent, which comprises the phosphorus removal material.
Example 2
The embodiment provides a preparation method of a phosphorus removal material, which comprises the following steps:
s1, preparation of raw diatomite:
weighing 200g of diatomite, putting the diatomite into a 500ml beaker, adding 30% dilute sulfuric acid by volume concentration until the diatomite is submerged, reacting the dilute sulfuric acid with impurities in the diatomite to generate bubbles, adding water for washing after no bubbles are generated, standing for layering, pouring out upper clear water, adding 400ml of 30% sulfuric acid, adding water for washing, standing for layering, repeating the operation for 3 times, taking down the layered product, putting the layered product into a drying box, drying at 90 ℃ to constant weight, grinding after drying, sieving by using a 200-mesh sieve, and calcining for 2 hours at 400 ℃ to obtain the original diatomite.
S2, preparation of a phosphorus removal material:
weighing 2.4g of glycine, 8g of calcium hydroxide and 6g of raw diatomite prepared in the step S1, putting the glycine, the calcium hydroxide and the raw diatomite into a beaker, adding water until the glycine, the calcium hydroxide and the raw diatomite are submerged, uniformly stirring by using a glass rod, carrying out ultrasonic treatment for 30 minutes with the output of 70w and the power of 40kHz to obtain a fully mixed mixture, taking out the mixture, putting the mixture into a drying box, drying the mixture to constant weight at 90 ℃, grinding the mixture after drying, and sieving the mixture by using a 200-mesh sieve to obtain the phosphorus removal material.
The embodiment also provides a phosphorus removal material prepared by the preparation method.
The embodiment also provides a sewage treatment agent, which comprises the phosphorus removal material.
Example 3
The embodiment provides a preparation method of a phosphorus removal material, which comprises the following steps:
s1, preparation of raw diatomite:
weighing 200g of diatomite, putting the diatomite into a 500ml beaker, adding 30% dilute sulfuric acid by volume concentration until the diatomite is submerged, reacting the dilute sulfuric acid with impurities in the diatomite to generate bubbles, adding water for washing after no bubbles are generated, standing for layering, pouring out upper clear water, adding 400ml of 30% sulfuric acid, adding water for washing, standing for layering, repeating the operation for 3 times, taking down the layered product, putting the layered product into a drying box, drying at 85 ℃ to constant weight, grinding after drying, sieving by using a 200-mesh sieve, and calcining for 2 hours at 400 ℃ to obtain the original diatomite.
S2, preparation of a phosphorus removal material:
weighing 2.4g of glycine, 8g of calcium hydroxide and 6g of raw diatomite prepared in the step S1, putting the glycine, the calcium hydroxide and the raw diatomite into a beaker, adding water until the glycine, the calcium hydroxide and the raw diatomite are submerged, uniformly stirring by using a glass rod, carrying out ultrasonic treatment for 30 minutes with the output of 70w and the power of 40kHz to obtain a fully mixed mixture, taking out the mixture, putting the mixture into a drying box, drying the mixture to constant weight at 85 ℃, grinding the mixture after drying, and sieving the mixture by using a 200-mesh sieve to obtain the phosphorus removal material.
The embodiment also provides a phosphorus removal material prepared by the preparation method.
The embodiment also provides a sewage treatment agent, which comprises the phosphorus removal material.
Experimental example 1
XRD characterization is carried out on the original diatomite and the phosphorus removal material prepared in example 1, and specific results are shown in figures 1-2, wherein figure 1 is an XRD spectrum of the original diatomite, and an obvious silicon dioxide peak value exists at about 26 degrees. FIG. 2 is an XRD pattern of the phosphorus removal material prepared in example 1. From the comprehensive comparison of FIGS. 1 and 2, Ca2+Already loaded on the diatomaceous earth.
Experimental example 2
XRF characterization is performed on the original diatomite and the phosphorus removal material prepared in example 1, and specific results are shown in the following table 1:
table 1 XRF results for phosphorus removal material prepared in example 1
| Sample number | Ca(％) | Si(％) | Al(％) | Mg(％) | Fe(％) | K(％) | Na(％) |
| Phosphorus removal material | 41.45 | 25.02 | 4.66 | 1.75 | 0.54 | 0.13 | 0.09 |
As can be seen from the XRF analysis results in Table 1, the content of Ca element occupies a larger proportion in the whole phosphorus removal material. Comparing the XRD patterns of fig. 1 and 2, respectively, is consistent with the XRD analysis results.
Experimental example 3
SEM characteristics are adopted for the original diatomite and the phosphorus removal material prepared in the example 1, and specific results are shown in figures 3-8 and tables 2-3.
Table 2 shows the contents of the elements in the original diatomaceous earth
| Element(s) | The weight percentage is Wt% | Atom percent At% |
| O | 44.24 | 58.40 |
| Mg | 03.22 | 02.80 |
| Al | 08.64 | 06.76 |
| Si | 39.64 | 29.81 |
| S | 01.85 | 01.22 |
| K | 00.49 | 00.27 |
| Ca | 00.22 | 00.12 |
| Fe | 01.70 | 00.64 |
Table 3 shows the contents of the elements in the phosphorus removal material prepared in example 1
| Element(s) | The weight percentage is Wt% | Atom percent At% |
| O | 46.16 | 63.72 |
| Mg | 02.41 | 02.19 |
| Al | 05.08 | 04.16 |
| Si | 18.70 | 14.71 |
| S | 02.45 | 01.68 |
| K | 00.31 | 00.18 |
| Ca | 22.66 | 12.49 |
| Fe | 02.24 | 00.88 |
Wherein, fig. 3 is a photograph of the original diatomite under the scanning of an electron microscope, fig. 5 is an energy spectrum of the original diatomite, and table 2 corresponds to fig. 4 and fig. 5 and is the content of each element in the original diatomite; fig. 6 is a photograph of the phosphorus removal material prepared in example 1 under scanning of an electron microscope, fig. 8 is an energy spectrum of the phosphorus removal material prepared in example 1, and table 3 corresponds to fig. 7 and fig. 8 and is contents of each element in the phosphorus removal material prepared in example 1.
From the scanning results of the electron microscope, Ca2+The diatomite is well loaded, and the energy spectrum diagram also fully verifies the point.
Experimental example 4
The phosphorus removal effect detection of the phosphorus removal material prepared in the embodiment 1 comprises the following steps:
preparing a phosphorus-containing solution with the concentration of 100mg/L, taking 6 conical flasks, respectively taking 100ml of the phosphorus-containing solution in the 6 conical flasks, respectively adjusting the pH values to 3, 4, 5, 6, 7 and 8, respectively weighing 0.1g of the phosphorus-containing material prepared in example 1, adding the phosphorus-containing material into the 6 conical flasks, stirring at the rotating speed of 150r/min for 2min, stirring at the rotating speed of 60r/min for 3min, and stirring at the rotating speed of 40r/min for 2 min. Standing for 2h after stirring and coagulation, taking supernatant to measure the residual phosphorus content, and calculating the removal rate, as shown in fig. 9.
As can be seen from fig. 9, the removal rate reached 97.06% at pH 3, 97.85% at pH 4, 96.68% at pH 5, 97.86% at pH 6, 93.69% at pH 7, and 86.12% at pH 8. The original diatomite removal rate at pH 7 was only 16.51%.
Preparing a phosphorus-containing solution with the concentration of 10mg/L, taking 4 conical flasks, respectively taking 100ml of the phosphorus-containing solution into the 4 conical flasks, respectively adjusting the temperature to be 25 ℃, 30 ℃, 40 ℃ and 50 ℃, respectively weighing 0.1g of the phosphorus-removing material prepared in example 1, adding the phosphorus-removing material into the 4 conical flasks, stirring for 2min at 120r/min, standing for 1h, taking the supernatant to measure the phosphorus concentration, and calculating the removal rate, wherein the specific result is shown in figure 10. As can be seen from FIG. 10, the temperature has little effect on the removal of the phosphorus removal material.
The phosphorus removal effect of the original diatomite is 15% -16%, while the phosphorus removal effect of the phosphorus removal material prepared in the embodiment 1 of the invention is greatly improved, and the maximum removal rate is about 97%.
When the phosphorus content of raw water is 2.5mg/L and the adding amount of calcium hydroxide is 205.9mg/L, the removal rate of Total Phosphorus (TP) is 96.4 percent at most, and the pH value after adding is 11.3. The treatment effect of the phosphorus removal material prepared in the embodiment 1 of the invention is better than that of only adding calcium hydroxide, the adding amount is far less than that of the conventional calcium hydroxide, and when the phosphorus removal material is added, the pH value of the solution is only increased to 9.6 and is far less than that of only adding calcium hydroxide.
Compared with the phosphorus removal of metal compounds, the phosphorus removal material has lower cost, and partial phosphorus removal of the metal compounds can cause the increase of metal elements in water, such as AlCl3While the increase of the content of metal compounds in water directly affects the health of human body, Ca2+Ca in water2+The CaCO gradually forms after a short rise in concentration3Precipitation, therefore, the phosphorus removal material prepared in the embodiment 1 of the invention can be applied to large-scale practical engineering.
The phosphorus removal material prepared in the embodiment 1 of the invention has a good treatment effect, has a good removal rate when the content of phosphorus in water is 100ml/L, and can treat not only phosphorus in domestic sewage but also high-phosphorus wastewater generated in mining and industrial production.
After the phosphorus removal material prepared in the embodiment 1 of the invention is used for treating phosphorus-containing sewage, a large amount of sludge can not be generated. Meanwhile, the diatomite is rich in reserves in China, is cheaper than a metal compound in dephosphorization, almost has no influence on the dephosphorization performance of the material due to temperature, can reach adsorption balance 30min after being added, and has high treatment efficiency.
It is to be noted that "comprising" in the present invention means that it may include other components in addition to the components described, and the "comprising" may be replaced with "being" or "consisting of … …" in a closed manner.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A preparation method of a phosphorus removal material is characterized by comprising the following steps:
s1, preparation of raw diatomite:
weighing 200g of diatomite, adding 30% sulfuric acid by volume concentration until the diatomite is submerged, adding water for washing after no bubbles are generated, standing for layering, taking a lower layer substance, drying to constant weight, grinding and sieving, and then calcining to obtain the original diatomite;
s2, preparation of a phosphorus removal material:
weighing 2.4g of glycine, 8g of calcium hydroxide and 6g of raw diatomite prepared in the step S1, adding water until the glycine, the calcium hydroxide and the raw diatomite are submerged, uniformly stirring, performing ultrasonic treatment to obtain a mixture, taking out, drying to constant weight, grinding and sieving to obtain the phosphorus removal material.
2. The method for preparing a phosphorus removal material as claimed in claim 1, wherein in step S1, the specific method for removing the underlayer is as follows:
pouring out clear water on the upper layer obtained after standing and layering, adding 400ml of sulfuric acid with the volume concentration of 30% into the lower layer, adding water for washing, standing and layering for 3 times, and taking out the lower layer.
3. The method of claim 1, wherein the mesh size of the screen in step S1 is 200 meshes.
4. The method for preparing phosphorus removal material as claimed in claim 1, wherein the drying temperature in step S1 is 80-90 ℃.
5. The method of claim 1, wherein the calcining step S1 is carried out at 400 ℃ for 2 h.
6. The method of claim 1, wherein the ultrasonic wave is applied at a power of 40kHz and a time of 30min in step S2.
7. The method for preparing phosphorus removal material as claimed in claim 1, wherein the drying temperature in step S2 is 80-90 ℃.
8. The method of any one of claims 1 to 7, wherein the sieved mesh size in step S2 is 200 mesh.
9. A phosphorus removal material prepared by the preparation method of any one of claims 1 to 8.
10. A wastewater treatment agent comprising the phosphorus removal material of claim 9.
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| CN113198418A (en) * | 2021-04-19 | 2021-08-03 | 贵州民族大学 | Method for preparing efficient phosphorus removal activated carbon by using edible fungus residues |
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