CN116371372B - Method for preparing adsorption material by utilizing sodium alginate reinforced ditch sludge screening product and prepared adsorption material - Google Patents
Method for preparing adsorption material by utilizing sodium alginate reinforced ditch sludge screening product and prepared adsorption material Download PDFInfo
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 35
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 29
- 235000010413 sodium alginate Nutrition 0.000 title claims abstract description 29
- 229940005550 sodium alginate Drugs 0.000 title claims abstract description 29
- 239000000661 sodium alginate Substances 0.000 title claims abstract description 29
- 238000012216 screening Methods 0.000 title claims abstract description 27
- 239000004576 sand Substances 0.000 claims abstract description 51
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- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 14
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
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- 238000005406 washing Methods 0.000 claims description 11
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- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims description 7
- 239000003463 adsorbent Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
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- 229910052757 nitrogen Inorganic materials 0.000 description 7
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- 238000001354 calcination Methods 0.000 description 4
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a method for preparing an adsorption material by utilizing sodium alginate to strengthen a through-ditch sludge screening product, which uses coarse sand and fine sand screened out by the through-ditch sludge as raw materials, adds broken glass and bentonite, prepares a primary material after mixing, drying and roasting, and then prepares a novel adsorption material by utilizing a sodium alginate embedding method for strengthening.
Description
Technical Field
The invention relates to a production method of an adsorption material, in particular to a method for preparing a novel adsorption material by utilizing sodium alginate to strengthen a through-ditch sludge screening product.
Background
The ditch sludge is a pipeline sediment of the sewage pipe network which is cleared out in the urban maintenance dredging process, mainly contains granular impurities which enter the pipeline along with domestic and industrial sewage, and also contains road dust fall, garbage and some construction engineering mud, if the sewage is not cleaned timely, the sewage is easily blocked from draining and conveying functions in the pipeline, so that ponding frequently occurs and sewage overflows, and meanwhile, the ditch sludge deposited in the pipeline also has the risk of polluting water along with the entering of the rainwater pipe network into rivers and lakes in rainy days.
The sludge in the through ditch has complex components, wide sources and black appearance, the water content of untreated sludge in the through ditch is generally 80-95%, the content of inorganic components in the sludge in the through ditch is higher, the sludge mainly comprises stones, sand grains, fine particle suspended matters, inorganic salts and the like, the density is generally 1.10-2.76 g/cm 3, and the density is higher than that of the activated sludge in a common sewage plant (0.5-1.1 g/cm 3). The sludge has a relatively fine particle size, wherein the large particles with the particle size of more than or equal to 10mm account for 25% -30%, the particles with the particle size of 0.2-10 mm account for 20% -25%, and the particles with the particle size of less than 0.2mm account for 50%. The sludge has inorganic components of SiO 2、CaO、Al2O3、SO3, mgO, etc. and contains great amount of quartz phase, and has the features of fine granularity, good plasticity, etc.
The treatment and disposal of the sludge in the through ditch in China are relatively lagged, and mainly landfills are adopted. In recent years, recycling treatment of sludge in the through trenches has been paid attention to in the Shanghai and Beijing, and the through trenches are mainly classified into different particle sizes by a classification treatment method of hydraulic elutriation and cyclone classification. However, through market research, although different components are screened out, the screened products are not effectively utilized, but are mainly landfilled and burned, wherein the landfilling needs to occupy a large amount of land resources, if the land is directly landfilled without treatment, secondary pollution is caused to soil and underground water by rain wash, and how to properly and scientifically treat the products after the channel sludge screening, so that the requirements of 'reduction, stabilization, harmlessness and resource four' are met, and the method has become a popular research.
Disclosure of Invention
The invention aims to solve the problems and provide a novel adsorption material which is prepared by using products, broken glass and bentonite after the through ditch sludge is screened as raw materials and sodium alginate as reinforcement and is used for adsorbing nitrogen and phosphorus in sewage. The adsorption material prepared by embedding the wastes such as the through-ditch sludge screening products and the broken glass into the sodium alginate can solve the problem of recycling the products after the through-ditch sludge screening, and realize the reduction, stabilization, harmlessness and recycling of the through-ditch sludge treatment. The prepared adsorption material can effectively adsorb nitrogen and phosphorus in sewage, and realize sewage treatment and waste treatment.
To achieve the above and other related objects, the present invention provides a method for preparing an adsorption material by using sodium alginate to strengthen a through-ditch sludge screening product, the method comprising the steps of: (1) Mixing 60-80 w/w% of through ditch sludge screened product, 3-5 w/w% of cullet and 15-35 w/w% of bentonite according to the mass ratio, uniformly stirring and granulating, wherein the through ditch sludge screened product is obtained by hydraulic elutriation and cyclone screening of the through ditch sludge; (2) Drying and roasting the mixture obtained in the step (1) to obtain a primary material; (3) preparing sodium alginate solution; (4) Adding the primary material prepared in the step (2) into the sodium alginate solution prepared in the step (3), slowly adding CaCl 2 solution, fully stirring, and fixing; and (5) filtering and washing the product fixed in the step (4) by deionized water to obtain the adsorption material.
The product ratio after the through ditch sludge is screened can be selected from 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80w/w%.
The cullet ratio may be selected from 3, 3.5, 4, 4.5, 5w/w%.
The bentonite may be selected from 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35w/w%.
As some embodiments of the present invention, the products after the sludge is screened in the through-ditch in the step (1) are coarse sand and fine sand after being subjected to hydraulic elutriation and rotational flow screening; the grain size of the coarse sand is 0.2-1 mm, the water content is 30-40 w/w%, and the organic matter content is 20-30 w/w%; the grain diameter of the fine sand is smaller than 0.2mm, the water content is 50-65 w/w%, the organic matter content is 40-50 w/w%, the mass ratio of the coarse sand is 20-30 w/w%, and the mass ratio of the fine sand is 40-50 w/w%.
The grit size can be selected from 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1mm.
The moisture content of the coarse sand can be selected from 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40w/w%.
The coarse sand organic matter content may be selected from 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30w/w%.
The fine sand moisture content may be selected from 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65w/w%.
The fine sand organic matter content may be selected from 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50w/w%.
As some embodiments of the present invention, the crushed glass in the step (1) is crushed and ground, and then screened with a granularity of 100-150 meshes; the granularity of bentonite is selected to be 0.05-0.1 mm.
The crushed glass particle size is selected from 100, 110, 120, 130, 140 and 150 meshes.
The particle size of bentonite is selected from 0.05, 0.06, 0.07, 0.08, 0.09 and 0.1mm.
The mass ratio of the coarse sand is 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 and 30w/w percent.
The fine sand mass ratio is 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50w/w%.
The through ditch sludge screening process comprises pretreatment, coarse material separation and fine material separation. The sludge in the through ditch is firstly separated from garbage with larger grain size (more than 100 mm) through a coarse grille, the rest materials are separated from stone with the grain size of 10-100 mm through a coarse screening device such as a washing drum, and then coarse sand with the grain size of 0.2-10 mm, organic screen residue with the grain size of 1-10 mm and fine sand with the grain size of less than 0.2mm are respectively separated through filtration and a hydrocyclone. Wherein the water content of the coarse sand is 30-40 w/w%, and the organic matter content is 20-30 w/w%; the water content of the fine sand is 50-65 w/w%, and the organic matter content is 40-50 w/w%.
The broken glass can be common and cheap waste glass, has a porous structure, has a certain sintering effect after high-temperature calcination, can promote solid-phase reaction, is beneficial to the formation of adsorption materials, and densifies the structure. The particle size of the broken glass is selected by considering the actual energy consumption problem, and the particle size is too large to be beneficial to forming and the adsorption effect is poor; the particle size is too small, and the grinding energy consumption is too large.
The bentonite is a nonmetallic mineral product taking montmorillonite as a main mineral component, and has good cohesiveness, adsorptivity, catalytic property and ion exchange property.
The sodium alginate is a polymer, and can form a gel or a film with heat resistance and uniform distribution after being calcified by CaCl 2 solution, and has the characteristics of low cost, high viscosity of water-soluble liquid, difficult degradation by microorganisms and the like.
As certain embodiments of the invention, the product after the through ditch sludge screening in the step (1) is 70w/w%, the broken glass is 3w/w%, the bentonite is 27w/w%, and the coarse sand in the product after the through ditch sludge screening is 30w/w% and the fine sand is 40w/w%.
As certain embodiments of the invention, the product after the through ditch sludge screening in the step (1) is 70w/w%, the broken glass is 5w/w%, the bentonite is 25w/w%, and the coarse sand in the product after the through ditch sludge screening is 20w/w% and the fine sand is 50w/w%.
As some embodiments of the invention, or in the step (1), the product after the through ditch sludge screening is 65w/w%, the broken glass is 4w/w%, the bentonite is 31w/w%, and the coarse sand in the product after the through ditch sludge screening is 25w/w% and the fine sand is 40w/w%.
As certain embodiments of the invention, the product after the through ditch sludge screening in the step (1) is 65w/w%, the broken glass is 3w/w%, the bentonite is 32w/w%, and the coarse sand in the product after the through ditch sludge screening is 25w/w% and the fine sand is 40w/w%.
As certain embodiments of the present invention, the particle size of the granulated particles in the step (1) is 10 to 15mm.
As some embodiments of the invention, the materials in the step (1) are mixed according to the proportion, and the water content of the materials is required to be controlled to be 40-50 w/v%.
The water content of the materials in the step (1) is selected from 40, 41, 42, 43, 44, 45, 46, 47, 48, 49 and 50w/v percent.
As certain embodiments of the present invention, the drying temperature in the step (2) is 110-130 ℃ and the drying time is 0.5-2.0 h.
The drying temperature in the step (2) is selected from 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130 ℃.
The drying time in the step (2) is 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 and 2.0h.
As some embodiments of the invention, the temperature rise rate of the calcination is 5 ℃/min, the calcination is heated to 1050-1250 ℃, and the calcination time is 40-60 min.
The temperature of calcination is selected from 1050、1060、1070、1080、1090、1100、1110、1120、1130、1140、1150、1160、1170、1180、1190、1200、1210、1220、1230、1240、1250℃.
The roasting time is selected from 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59 and 60min.
As certain embodiments of the present invention, the concentration of the sodium alginate solution in the step (3) is 2-3 w/v%.
The concentration of the sodium alginate solution in the step (3) is selected from 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9 and 3w/v percent.
As some embodiments of the present invention, the CaCl 2 solution concentration in step (4) is 2-3 w/v%; the fixed time is 8-10 hours.
The CaCl 2 solution concentration in the step (4) is selected from 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9 and 3w/v%.
The fixed time is 8, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9, 10 hours.
As some embodiments of the present invention, the washing in the step (5) is performed 3 to 5 times.
Washing 3, 4 and 5 times in the step (5).
The invention also provides the adsorption material prepared by the method.
As described above, the method for preparing the adsorption material by utilizing the sodium alginate reinforced ditch sludge screening product and the prepared adsorption material have the following beneficial effects:
The method for preparing the nitrogen-phosphorus adsorption material from the products after the through-ditch sludge is screened can fully utilize wastes such as the through-ditch sludge and waste glass, and realize resource utilization; compared with the prior main landfill disposal measures, the method not only can save a large amount of land resources, but also can avoid secondary pollution to soil caused by pollutants contained in the ditch sludge;
Meanwhile, the macromolecule organic carrier of sodium alginate is used for embedding and fixing, the traditional adsorption material is reinforced, the novel composite carrier material is prepared, the adsorption capacity and adsorption capacity of the material can be enhanced, the adsorption of nitrogen and phosphorus organic substances in sewage can be greatly completed, the water inlet load of a sewage plant is reduced, and the purpose of treating waste with sewage is finally realized.
Drawings
FIG. 1 shows a schematic process flow of the present invention.
Detailed Description
The invention is further illustrated below in connection with specific examples, which are to be understood as being illustrative of the invention and not limiting the scope of the invention. Other advantages and effects of the present invention will be readily apparent to those skilled in the art from the present disclosure. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
It is to be understood that the terminology used in the examples of the invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention; in the description and claims of the invention, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition to the specific methods, devices, materials used in the embodiments, any methods, devices, and materials of the prior art similar or equivalent to those described in the embodiments of the present invention may be used to practice the present invention according to the knowledge of one skilled in the art and the description of the present invention.
Unless otherwise indicated, all experimental methods, detection methods, and preparation methods disclosed herein employ techniques conventional in the art and those conventional in the relevant arts.
Example 1 preparation of novel adsorption Material Using sodium alginate reinforced through-ditch sludge Screen product
The preparation method comprises the following specific operation steps:
(1) The products (coarse sand 30%, fine sand 40%) obtained by screening the sludge with the through ditch in the mass ratio of 70%, 3w/w% of broken glass and 27w/w% of bentonite are mixed after grinding and sieving, and spherical objects with the diameter of 10mm are produced by a granulator, wherein the broken glass is required to be ground and sieved by a 100-mesh sieve, and the granularity of the bentonite is selected to be 0.05mm. The water content of the mixture is measured after the mixture is fully stirred, so that the water content is controlled at 40 percent;
(2) Drying the mixture in a 110 ℃ oven for 1h, taking out, heating to 1050 ℃ in a box-type resistance furnace at a heating rate of 5 ℃/min, and roasting for 40min to obtain a primary material;
(3) Fully mixing the primary material with the prepared 2% sodium alginate solution, adding 2% CaCl 2 solution, fixing for 8 hours, and filtering and washing with deionized water for 3 times to obtain the novel adsorption material.
Example 2 preparation of novel adsorbent Material Using sodium alginate reinforced through-ditch sludge Screen product
The preparation method comprises the following specific operations:
(1) The products (coarse sand 20%, fine sand 50%), 5w/w% of broken glass and 25w/w% of bentonite after sieving the sludge with the through ditch of 70% by mass are mixed after grinding and sieving, and the broken glass is required to be ground and sieved by a 110-mesh sieve in a granulator, wherein the granularity of the bentonite is selected to be 0.07mm. The water content of the mixture is measured after the mixture is fully stirred, so that the water content is controlled at 40 percent;
(2) Drying the mixture in a 115 ℃ oven for 1.5 hours, taking out, heating to 1100 ℃ in a box-type resistance furnace at a heating rate of 5 ℃/min, and roasting for 40min to obtain a primary material;
(3) Fully mixing the primary material with the prepared 2% sodium alginate solution, adding 2% CaCl 2 solution, fixing for 8 hours, and filtering and washing with deionized water for 3 times to obtain the novel adsorption material.
Example 3 preparation of novel adsorption Material Using sodium alginate reinforced through-ditch sludge Screen product
The preparation method comprises the following specific operations:
(1) The products (coarse sand 25%, fine sand 40%) obtained by screening the sludge with the through ditch in the mass ratio of 65%, 4w/w% of broken glass and 31w/w% of bentonite are mixed after grinding and sieving, and the balls with the diameter of 14mm are manufactured by a granulator, wherein the broken glass is required to be ground and sieved by a 115-mesh sieve, and the granularity of the bentonite is selected to be 0.075mm. The water content of the mixture is measured after the mixture is fully stirred, so that the water content is controlled at 40 percent;
(2) Drying the mixture in a 115 ℃ oven for 1.5 hours, taking out, heating to 1150 ℃ in a box-type resistance furnace at a heating rate of 5 ℃/min, and roasting for 50min to obtain a primary material;
(3) Fully mixing the primary material with the prepared 3% sodium alginate solution, adding 2% CaCl 2 solution, fixing for 10 hours, and filtering and washing with deionized water for 3 times to obtain the novel adsorption material.
Example 4 preparation of novel adsorbent Material Using sodium alginate reinforced through-ditch sludge Screen product
The preparation method comprises the following specific operations:
(1) The products (coarse sand 25%, fine sand 40%) obtained by screening the sludge with the through ditch in the mass ratio of 65%, 4w/w% of broken glass and 31w/w% of bentonite are mixed after grinding and sieving, and the balls with the diameter of 14mm are manufactured by a granulator, wherein the broken glass is required to be ground and sieved by a 115-mesh sieve, and the granularity of the bentonite is selected to be 0.075mm. The water content of the mixture is measured after the mixture is fully stirred, so that the water content is controlled at 40 percent;
(2) Drying the mixture in a 115 ℃ oven for 1.5 hours, taking out, heating to 1200 ℃ in a box-type resistance furnace at a heating rate of 5 ℃/min, and roasting for 50min to obtain a primary material;
(3) Fully mixing the primary material with the prepared 3% sodium alginate solution, adding 3% CaCl 2 solution, fixing for 10 hours, and filtering and washing with deionized water for 3 times to obtain the novel adsorption material.
Example 5 preparation of novel adsorbent Material Using sodium alginate reinforced through-ditch sludge Screen product
The preparation method comprises the following specific operations:
(1) The products (coarse sand 25%, fine sand 40%) obtained by screening the sludge with the through ditch in the mass ratio of 65%, 3w/w% of broken glass and 32w/w% of bentonite are mixed after grinding and sieving, and the balls with the diameter of 14mm are manufactured by a granulator, wherein the broken glass is required to be ground and sieved by a 120-mesh sieve, and the granularity of the bentonite is selected to be 0.075mm. The water content of the mixture is measured after the mixture is fully stirred, so that the water content is controlled at 40 percent;
(2) Drying the mixture in a120 ℃ oven for 1.5 hours, taking out, heating to 1200 ℃ in a box-type resistance furnace at a heating rate of 5 ℃/min, and roasting for 50min to obtain a primary material;
(3) Fully mixing the primary material with the prepared 2.5% sodium alginate solution, adding 2% CaCl 2 solution, fixing for 10 hours, and filtering and washing with deionized water for 4 times to obtain the novel adsorption material.
Example 6 preparation of novel adsorption Material Using sodium alginate-reinforced through-ditch sludge Screen product adsorption Effect on Nitrogen and phosphorus in wastewater
5 Groups of 100ml simulated wastewater are respectively taken and placed in conical flasks, wherein the ammonia nitrogen concentration is 10ml/L, the total nitrogen concentration is 20mg/L and the total phosphorus concentration is 20mg/L, the novel adsorption materials prepared in the examples 1-5 are added, and the mixture is placed in a water bath kettle and kept at 26 ℃ for 1.5 hours. Taking out 20ml of the adsorbed solution, centrifuging for 10min at a centrifuge speed of 3000r/min, taking supernatant, measuring ammonia nitrogen, total nitrogen and total phosphorus concentration again, and calculating the removal rate, wherein the data are shown in the table 1 below.
TABLE 1
| Sequence number | Ammonia nitrogen removal rate/% | Total nitrogen removal/% | Total phosphorus removal/% |
| Example 1 | 88％ | 75％ | 90％ |
| Example 2 | 86％ | 75％ | 92％ |
| Example 3 | 90％ | 77％ | 92.5％ |
| Example 4 | 93％ | 76％ | 94％ |
| Example 5 | 93％ | 77％ | 95％ |
While the invention has been described with respect to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and additions may be made without departing from the scope of the invention. Equivalent embodiments of the present invention will be apparent to those skilled in the art having the benefit of the teachings disclosed herein, when considered in the light of the foregoing disclosure, and without departing from the spirit and scope of the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The method for preparing the adsorption material by utilizing the sodium alginate reinforced ditch sludge screening product is characterized by comprising the following steps of:
(1) Mixing the sieved product of the through ditch sludge with the mass ratio of 60-80 w/w%, 3-5 w/w% of broken glass and 15-35 w/w% of bentonite, uniformly stirring and granulating, wherein the sieved product of the through ditch sludge is obtained by hydraulic elutriation and cyclone sieving of the through ditch sludge;
(2) Drying and roasting the mixture obtained in the step (1) to obtain a primary material; (3) preparing sodium alginate solution;
(4) Adding the primary material prepared in the step (2) into the sodium alginate solution prepared in the step (3), slowly adding CaCl 2 solution, fully stirring, and fixing;
(5) And (3) filtering and washing the product fixed in the step (4) by deionized water to obtain the adsorption material.
2. The method according to claim 1, wherein the products after the channel sludge is screened in the step (1) are coarse sand and fine sand after the hydraulic elutriation and the rotational flow screening; the grain size of the coarse sand is 0.2-1 mm, the water content is 30-40 w/w%, and the organic matter content is 20-30 w/w%; the grain diameter of the fine sand is smaller than 0.2mm, the water content is 50-65 w/w%, the organic matter content is 40-50 w/w%, the coarse sand accounts for 20-30 w/w% of the mixture in the step (1), and the fine sand accounts for 40-50 w/w% of the mixture in the step (1);
The crushed glass in the step (1) is crushed and ground, and then the sieved granularity is 100-150 meshes; the granularity of bentonite is selected to be 0.05-0.1 mm.
3. The method according to claim 1, wherein the through ditch sludge screened product in the step (1) is 70w/w%, broken glass is 3w/w%, bentonite is 27w/w%, coarse sand in the through ditch sludge screened product accounts for 40w/w% of the mixture in the step (1), and fine sand accounts for 30w/w% of the mixture in the step (1);
Or in the step (1), the screened product of the through ditch sludge is 70w/w%, the broken glass is 5w/w%, the bentonite is 25w/w%, the coarse sand in the screened product of the through ditch sludge accounts for 50w/w% of the mixture in the step (1), and the fine sand accounts for 20w/w% of the mixture in the step (1);
or 65w/w% of the product after the through ditch sludge is screened in the step (1), 4w/w% of broken glass and 31w/w% of bentonite, wherein coarse sand accounts for 40w/w% of the mixture in the step (1) and fine sand accounts for 25w/w% of the mixture in the step (1);
or 65w/w% of the product after the through ditch sludge is screened in the step (1), 3w/w% of broken glass and 32w/w% of bentonite, wherein coarse sand accounts for 50w/w% of the mixture in the step (1) in the product after the through ditch sludge is screened, and fine sand accounts for 15w/w% of the mixture in the step (1).
4. The method according to claim 1, wherein the granulated particles in the step (1) have a particle size of 10 to 15mm.
5. The method according to claim 1, wherein the materials in the step (1) are mixed according to the proportion, and the water content is controlled to be 40-50 w/v%.
6. The method according to claim 1, wherein the drying temperature in step (2) is 110 to 130 ℃ and the drying time is 0.5 to 2.0 hours;
the temperature rising rate of the roasting is 5 ℃/min, the roasting is heated to 1050-1250 ℃, and the roasting time is 40-60 min.
7. The method according to claim 1, wherein the concentration of the sodium alginate solution in the step (3) is 2-3 w/v%.
8. The method according to claim 1, wherein the CaCl 2 solution concentration in step (4) is 2-3 w/v%; the fixed time is 8-10 hours.
9. The method according to claim 1, wherein the washing in step (5) is performed 3 to 5 times.
10. An adsorbent material prepared according to the method of any one of claims 1 to 9.
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