CN115591527B - Dephosphorization particle adsorbent and preparation method and application thereof - Google Patents
Dephosphorization particle adsorbent and preparation method and application thereof Download PDFInfo
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- CN115591527B CN115591527B CN202111403502.5A CN202111403502A CN115591527B CN 115591527 B CN115591527 B CN 115591527B CN 202111403502 A CN202111403502 A CN 202111403502A CN 115591527 B CN115591527 B CN 115591527B
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- 239000003463 adsorbent Substances 0.000 title claims abstract description 45
- 239000002245 particle Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000440 bentonite Substances 0.000 claims abstract description 21
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 21
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 21
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 20
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 20
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 20
- 239000002689 soil Substances 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 51
- 239000011574 phosphorus Substances 0.000 claims description 51
- 229910052698 phosphorus Inorganic materials 0.000 claims description 51
- 238000007873 sieving Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 21
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 16
- 238000001179 sorption measurement Methods 0.000 description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 238000012851 eutrophication Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 229910052746 lanthanum Inorganic materials 0.000 description 4
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 4
- 241000195493 Cryptophyta Species 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 3
- 235000019796 monopotassium phosphate Nutrition 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- -1 CRB12 and CRB 62) Chemical compound 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 description 1
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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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
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- 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
- B01J20/12—Naturally occurring clays or bleaching 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
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved 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
- C02F2101/105—Phosphorus compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a dephosphorization particle adsorbent, a preparation method and application thereof. The dephosphorization granular adsorbent comprises the following raw materials in parts by weight: 1 part of calcium hydroxide, 6.5 to 8.5 parts of red soil and 0.5 to 2.5 parts of bentonite; the preparation method comprises mixing the above materials, and granulating. The dephosphorization particle adsorbent disclosed by the invention has the advantages of wide raw material sources, low cost, simple preparation method, low energy consumption, no secondary pollution, good dephosphorization effect, wide pH application range and capability of being used for mass production for dephosphorization of water bodies.
Description
Technical Field
The invention belongs to the field of water dephosphorization, and particularly relates to a dephosphorization particle adsorbent, and a preparation method and application thereof.
Background
Eutrophication of water has become one of the major environmental problems to be solved worldwide. Phosphorus is a main limiting nutrient element in a freshwater ecological system, and the biomass of algae is generally and remarkably positively correlated with the phosphorus concentration of a water body, so that the reduction of the phosphorus concentration of the water body is an important component part of eutrophication control of the water body, and is an effective method for inhibiting the growth of harmful algae. After the exogenous phosphorus input in the lake and the reservoir is effectively restrained, the pollution control of the endogenous phosphorus in the water body and the sediment directly determines the treatment effect of eutrophication.
The adsorption method is widely applied to the control of phosphorus in eutrophic water bodies and has the advantages of high efficiency, economy, easy operation and the like. Although the existing common metal (such as iron, aluminum, manganese, lanthanum and the like) modified dephosphorization adsorbent has good phosphorus adsorption effect, the release of the metal ions in water has a certain harm to the health of aquatic organisms. Commercial phosphorus locking agent used in marketThe formula is 5% of lanthanum and 95% of bentonite), although the phosphorus removal effect is good, the rare earth element lanthanum used by the formula has high cost, certain harm to aquatic organisms, the pH application range is narrow, the effect is good only under weak acid and neutral conditions (pH is 5-7), the adsorption quantity of phosphorus is drastically reduced under alkaline conditions, and the field eutrophication water body (particularly the water body with high algae content) is generally alkaline. Therefore, an efficient dephosphorization adsorbent with low cost, high ecological safety and wide pH application range is urgently needed to be found.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a dephosphorization particle adsorbent which comprises the following raw materials in parts by weight: 1 part of calcium hydroxide, 6.5 to 8.5 parts of red soil and 0.5 to 2.5 parts of bentonite.
Preferably, the dephosphorization granular adsorbent comprises the following raw materials in parts by weight: 1 part of calcium hydroxide, 8 parts of red soil and 1 part of bentonite. Or 1 part of calcium hydroxide, 8.5 parts of red soil and 0.5 part of bentonite. Or 1 part of calcium hydroxide, 6.5 parts of red soil and 2.5 parts of bentonite.
The inventor discovers that the dephosphorization granular adsorbent prepared by adopting the calcium hydroxide, the red soil and the bentonite with specific proportion can exert good dephosphorization effect under wider pH condition, and the dephosphorization effect is better than that of the traditional commercial phosphorus locking agentIn addition, calcium hydroxide belongs to an alkaline reagent, the content is high, the pH of the water body is too high due to the fact that the water body is added, aquatic organisms can be harmed, and the amount of the calcium hydroxide in the adsorbent is only 10% and is relatively safe; the red soil is slightly acidic, so that the alkalinity of calcium hydroxide and water can be neutralized to a certain extent, and the aluminum and iron which are rich in the red soil can also enable the dephosphorization particle adsorbent to have a certain flocculation and precipitation effect; after the bentonite is added, the dephosphorization effect of the dephosphorization particle adsorbent can be improved, and the strength of the dephosphorization particle adsorbent can be enhanced due to certain viscosity, so that the dephosphorization particle adsorbent is disturbed in the water body and cannot be easily scattered to cause turbidity of the water body. Meanwhile, the dephosphorization particle adsorbent is used as a particle material, can also cover the bottom mud, can prevent the bottom mud from being resuspended, increases the binding capacity of sediment to phosphorus, increases the stability of sediment, inhibits the release of endogenous phosphorus, and the pores among the particles can not prevent the diffusion of dissolved oxygen in water body to the bottom mud.
The preparation method of the dephosphorization particle adsorbent comprises the following steps: mixing the raw materials, and granulating. Preferably, the granular adsorbent having a particle diameter of 1 to 5mm is obtained by mixing, granulating and sieving. Preferably, the mixture is dried for 24 hours at 40-65 ℃ after sieving, and sealed.
The beneficial effects of the invention are as follows: the dephosphorization particle adsorbent disclosed by the invention has the advantages of wide raw material sources, low cost, simple preparation method, low energy consumption, no secondary pollution, good dephosphorization effect, wide pH application range and capability of being used for mass production for dephosphorization of water bodies.
Drawings
FIG. 1 is a graph showing the relationship between the amount of the adsorbent added and the phosphorus removal rate;
FIG. 2 is a graph showing the relationship between the removal rate of the adsorbent and phosphorus at different pH conditions;
FIG. 3 is a graph showing a one week change in total phosphorus and soluble phosphorus removal rate from eutrophic lake water.
Detailed Description
The conception and the technical effects produced by the present invention will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, aspects and effects of the present invention.
Example 1:
weighing 4.8kg of red soil powder, 0.6kg of bentonite powder and 0.6kg of calcium hydroxide powder, adding into a disc granulator, fully mixing, adding 1.6L of water, adjusting the rotating speed of a rotor to 1600rpm, adjusting the rotating speed of a granulating disc to 50rpm, operating for 12min, screening particles with the particle size of 2-3mm, drying in a constant-temperature blast drying oven at 65 ℃ for 24h to obtain the dephosphorization particle adsorbent, and filling into a plastic bottle for sealing for standby.
Example 2:
Comparative experiments were set up as shown in Table 1, with 1 part in Table 1 representing 0.6kg, and CRB22 being the phosphorus removal particulate adsorbent of example 1, and each of the formulations in Table 1 was prepared under the conditions of example 1 (except for PL2, R2 and B2); wherein PL2 is commercial phosphorus locking agent (lanthanum 5%, bentonite 95%, purchased from Jiangsu Xin environmental engineering Co., ltd.), and the particle size of the adsorbent obtained from each formulation in Table 1 is 2-3mm.
TABLE 1
The solution with the phosphorus concentration of 5mg/L is prepared by adopting monopotassium phosphate, and the pH value is regulated to 7 by adopting 0.1mol/L of HCl solution and 0.1mol/L of NaOH solution. Then, the adsorbents in Table 1 were weighed and added to 200mL of phosphorus solution (the addition amounts were 0.5 g/L), respectively, and 2 replicates were set and placed on a shaker; the shaker set parameters were 200rpm,24h. Finally, the reaction solution was filtered by using a 0.45 μm glass fiber filter membrane, and the phosphorus content of the stock solution and the phosphorus content after adsorption were measured to obtain the removal rate, and the results are shown in Table 2.
TABLE 2
| Code number | Removal rate of |
| R2 | 3.98％ |
| CRB12 | 91.52％ |
| CRB22 | 95.15％ |
| CRB221 | 98.90％ |
| CRB224 | 98.45％ |
| CRB32 | 89.76％ |
| CRB42 | 72.83％ |
| CRB52 | 71.14％ |
| CRB62 | 79.08％ |
| B2 | 2.99％ |
| PL2 | 85.06％ |
As can be seen from table 2, red soil (i.e., R2) and bentonite (i.e., B2) itself have little dephosphorization effect; the adsorbents (namely CRB12 and CRB 62) obtained after the red soil and bentonite are respectively matched with calcium hydroxide can greatly improve the removal rate of phosphorus.
Furthermore, the inventors have found that when red soil, bentonite, calcium hydroxide are used according to (6.5-8.5): (0.5-2.5): 1, as with CRB22, CRB221 and CRB224, exhibit an adsorption efficiency that is further improved compared to the adsorption efficiency of CRB12, CRB62 and commercial phosphorus locker PL 2.
However, when red soil, bentonite and calcium hydroxide are mixed in other proportions to form granular adsorbents (i.e., CRB32, CRB42 and CRB 52), the adsorption efficiency is lower than that of adsorbents formed by mixing red soil and bentonite with calcium hydroxide respectively (i.e., CRB12 and CRB 62).
In order to more intuitively embody the effect, the inventors formed graphs of the adsorption effect of CRB12, CRB22, CRB32, CRB42, CRB52, CRB62 with different addition amounts, as shown in fig. 1, it can be intuitively obtained that the adsorption efficiency of CRB22 is further improved compared with that of CRB12 and CRB62, and when red soil, bentonite, and calcium hydroxide are adopted to form a granular adsorbent (i.e., CRB32, CRB42, CRB 52) in other proportions, the adsorption efficiency is rather lower than that of the adsorbent formed by the red soil and bentonite respectively matched with calcium hydroxide (i.e., CRB12 and CRB 62), which is quite surprising.
In addition, a solution having a phosphorus concentration of 10mg/L was prepared using potassium dihydrogen phosphate, and the pH was adjusted to 7 using a 0.1mol/L HCl solution and a 0.1mol/L NaOH solution. The adsorbents in Table 1 were then weighed and added to 200mL of the phosphorus solution (the amount added was 0.5g/L, respectively), 2 replicates were set, and the phosphorus removal rate was calculated using the same conditions as described above, and the results are shown in Table 3.
TABLE 3 Table 3
| Code number | Removal rate of |
| CRB12 | 64.43％ |
| CRB22 | 81.43％ |
| CRB32 | 58.89％ |
| CRB42 | 27.20％ |
| CRB52 | 53.48％ |
| CRB62 | 45.49％ |
| PL2 | 42.27％ |
As can be seen from Table 3, the advantageous effect of the adsorbent (CRB 22) of the present invention is more remarkable when treating high-concentration phosphorus wastewater than when CRB12, CRB62 and commercial phosphorus locker PL2, and the removal rate of CRB32, CRB42 and CRB52, which are not used in the specific ratio of the present invention, is even far lower than that of CRB12.
Example 3:
The potassium dihydrogen phosphate is adopted to prepare a solution with the phosphorus concentration of 5mg/L, and 0.1mol/L of HCl solution and 0.1mol/L of NaOH solution are adopted to respectively adjust the pH values to 5, 7, 9 and 11. Then about 100mg of CR B22, commercial phosphorus locking agent PL2, CRB42, CRB52 and CRB62 adsorbents in Table 1 of example 2 were weighed separately and added to 200mL of phosphorus solution, 2 replicates were set, and placed on a shaker; the shaker set parameters were 200rpm,24h. Finally, a 0.45 mu m glass fiber filter membrane is adopted to filter the reaction liquid, and the phosphorus content of the stock solution and the phosphorus content after adsorption are measured.
As a result, as shown in FIG. 2, it was found that the commercial phosphorus locker PL2 was adapted to a pH range of only 5-7, whereas the CRB22 was adapted to a pH range of 5-11, which is far superior to the commercial phosphorus locker PL2.
Example 4:
The 6 glass cylinders with length and width of 0.6m and width of 0.5m and 1.0m are divided into two groups, one group is 3 control groups without adding any substances, one group is 3 treatment groups (short treatment groups) with adding CRB22 in example 2, 270L of eutrophic lake water is added to each of the 6 glass cylinders, and the total phosphorus and soluble phosphorus contents of the initial water body are measured to be 0.537+/-0.196 mg/L and 0.329+/-0.175 mg/L respectively. The CRB22 with the mass of 1080g is weighed and added into a glass jar of a treatment group, the adding amount is 4g/L, the total phosphorus and the soluble phosphorus content of the water body are measured every 2 days, the change of the total phosphorus and the soluble phosphorus content of the water body is shown in figure 3, the highest removal rate of the total phosphorus content of the water body of the 7-day post-treatment group is 73.33%, the highest removal rate of the soluble phosphorus is 99.01%, the lowest soluble phosphorus content of the water body can reach 0.006mg/L, and the CRB22 dephosphorization particles prepared by the invention can effectively remove the phosphorus content of the water body in a field eutrophication water body.
Example 5:
The CRB22 in example 2 was packed with an organic glass packed column having an inner diameter of 8cm at a height of 20cm, a peristaltic pump was set at 50rpm, a flow rate of 220mL/min, a concentration of the phosphorus solution in the inlet water of 100mg/L, a concentration of the phosphorus solution in the outlet water of 0.217mg/L, and a removal rate of 99.78%. The CRB22 dephosphorization particles prepared by the method have good removal effect on high-concentration phosphorus wastewater, and can be used for sewage treatment plants.
The situation in actual water bodies (including eutrophic lake water and sewage) is more complicated, and the adsorbent with good removal effect under standard experimental conditions does not necessarily have the same good effect in actual water body treatment, but the CRB22 dephosphorization particles of the present invention also show excellent dephosphorization effect in actual water body treatment according to the descriptions of examples 4 and 5.
The present invention is not limited to the above embodiments, but is merely preferred embodiments of the present invention, and the present invention should be construed as being limited to the above embodiments as long as the technical effects of the present invention are achieved by the same means. Various modifications and variations are possible in the technical solution and/or in the embodiments within the scope of the invention.
Claims (7)
1. The dephosphorization granular adsorbent is characterized by comprising the following raw materials in parts by weight: 1 part of calcium hydroxide, 6.5 to 8.5 parts of red soil and 0.5 to 2.5 parts of bentonite; the particle size of the dephosphorization particle adsorbent is 1-5mm;
The preparation method of the dephosphorization particle adsorbent comprises the following steps: mixing the raw materials, granulating, sieving, drying at 40-65deg.C for 24 hr, and sealing to obtain the dephosphorization granule adsorbent with particle diameter of 1-5 mm.
2. The dephosphorization particle adsorbent according to claim 1, characterized in that the raw materials thereof comprise, in parts by weight: 1 part of calcium hydroxide, 8 parts of red soil and 1 part of bentonite.
3. The dephosphorization particle adsorbent according to claim 1, characterized in that the raw materials thereof comprise, in parts by weight: 1 part of calcium hydroxide, 8.5 parts of red soil and 0.5 part of bentonite.
4. The dephosphorization particle adsorbent according to claim 1, characterized in that the raw materials thereof comprise, in parts by weight: 1 part of calcium hydroxide, 6.5 parts of red soil and 2.5 parts of bentonite.
5. A process for preparing a phosphorus removal particulate adsorbent as claimed in any one of claims 1 to 4, comprising the steps of: mixing and granulating the raw materials, and sieving to obtain the dephosphorization granular adsorbent with the particle size of 1-5 mm.
6. The preparation method according to claim 5, wherein the mixture is dried at 40-65 ℃ for 24 hours after sieving, and sealed.
7. Use of the dephosphorization particle adsorbent according to any one of claims 1 to 4 in the field of water dephosphorization.
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| PL401689A1 (en) * | 2012-11-20 | 2014-05-26 | Zachodniopomorski Uniwersytet Technologiczny W Szczecinie | Agent for purifying water from dissolved phosphorus compounds |
| KR101570130B1 (en) * | 2015-05-12 | 2015-11-18 | 동원중공업 주식회사 | Multiple odor absorbents by using mixing the natural zeolite and method of fabricating the same |
| CN107694547A (en) * | 2017-10-27 | 2018-02-16 | 芜湖格丰环保科技研究院有限公司 | A kind of water depth dephosphorization adsorbent and preparation method thereof |
| CN108097205A (en) * | 2017-12-29 | 2018-06-01 | 中国科学院亚热带农业生态研究所 | A kind of method and application that wastewater efficient dephosphorization adsorbent is prepared using bentonite |
| CN109294599A (en) * | 2018-11-27 | 2019-02-01 | 宝武集团环境资源科技有限公司 | A kind of passivator for restoration of soil polluted by heavy metal |
| CN112044393B (en) * | 2019-06-06 | 2021-05-04 | 中南大学 | Two-dimensional clay-based composite phosphorus removal agent and preparation method and application thereof |
| CN110316782B (en) * | 2019-07-02 | 2021-11-26 | 成都理工大学 | Covering material for inhibiting release of phosphorus in sediment |
| CN110624499A (en) * | 2019-09-06 | 2019-12-31 | 生态环境部南京环境科学研究所 | Red clay phosphorus adsorbent and preparation method and application thereof |
| CN113200580B (en) * | 2021-03-29 | 2023-08-18 | 江苏省中国科学院植物研究所 | Water body phosphorus removal material based on biomass power plant ash and preparation method and application thereof |
| CN113058547A (en) * | 2021-04-15 | 2021-07-02 | 南京大学 | Efficient phosphorus removal agent, preparation method and application thereof |
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