CN112452312A - Ammonia nitrogen adsorbent and method for removing ammonia nitrogen in water body - Google Patents
Ammonia nitrogen adsorbent and method for removing ammonia nitrogen in water body Download PDFInfo
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- CN112452312A CN112452312A CN201910843974.9A CN201910843974A CN112452312A CN 112452312 A CN112452312 A CN 112452312A CN 201910843974 A CN201910843974 A CN 201910843974A CN 112452312 A CN112452312 A CN 112452312A
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- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 239000003463 adsorbent Substances 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003513 alkali Substances 0.000 claims abstract description 20
- 238000005406 washing Methods 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000002791 soaking Methods 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 47
- UNYSKUBLZGJSLV-UHFFFAOYSA-L calcium;1,3,5,2,4,6$l^{2}-trioxadisilaluminane 2,4-dioxide;dihydroxide;hexahydrate Chemical compound O.O.O.O.O.O.[OH-].[OH-].[Ca+2].O=[Si]1O[Al]O[Si](=O)O1.O=[Si]1O[Al]O[Si](=O)O1 UNYSKUBLZGJSLV-UHFFFAOYSA-L 0.000 claims description 4
- 229910052676 chabazite Inorganic materials 0.000 claims description 4
- 229910052680 mordenite Inorganic materials 0.000 claims description 4
- 229910052677 heulandite Inorganic materials 0.000 claims description 3
- 229910052908 analcime Inorganic materials 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 33
- 230000000694 effects Effects 0.000 abstract description 19
- 239000002351 wastewater Substances 0.000 abstract description 11
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000005342 ion exchange Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 241000195493 Cryptophyta Species 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- 208000012868 Overgrowth Diseases 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 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
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000035943 smell Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- B01J20/16—Alumino-silicates
- B01J20/165—Natural alumino-silicates, e.g. zeolites
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention belongs to the technical field of wastewater treatment, and particularly relates to an ammonia nitrogen adsorbent and a method for removing ammonia nitrogen in a water body. The ammonia nitrogen adsorbent of the invention is prepared by a method comprising the following steps: soaking the natural ore in an alkali liquor with the pH value of more than 14 for 20-24 hours, then filtering, and washing the natural ore until the pH value of a washing liquor is 8-9. The ammonia nitrogen adsorbent disclosed by the invention is alkaline, so that the effect of removing ammonia nitrogen in wastewater is better, and the highest unit adsorption quantity of the ammonia nitrogen can reach more than 40 mg/L.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to an ammonia nitrogen adsorbent and a method for removing ammonia nitrogen in a water body.
Background
A large amount of domestic sewage, industrial wastewater and the like are discharged into urban water bodies, so that the content of ammonia nitrogen in the water bodies is overhigh, the eutrophication of the water bodies is caused, and the overgrowth of plants and algae is stimulated. Excessive growth of plants and algae consumes a large amount of oxygen in water, and in extreme cases, a completely anoxic environment can be formed, so that fishes and other aquatic organisms die, and dead bodies are rotten, hydrolyzed and fermented, so that the water body finally turns black and smells. Therefore, the removal of ammonia nitrogen is one of the important works for treating water pollution.
The ammonia nitrogen in the water is in ionic ammonium (NH)4 +) And free ammonia (NH)3) The two forms exist, ionic ammonium and free ammonium are mutually converted along with the change of the pH value of the water body, the ionic ammonium and the free ammonium are in a balanced state, and the ionic ammonium in the water body with the pH value close to neutrality is the main existing form of ammonia nitrogen.
Disclosure of Invention
The invention aims to provide an ammonia nitrogen adsorbent with a good ammonia nitrogen removal effect and a method for removing ammonia nitrogen in a water body.
The ammonia nitrogen adsorbent adopts the technical scheme that:
an ammonia nitrogen adsorbent prepared by a process comprising the steps of: soaking the natural ore in an alkali liquor with the pH value of more than 14 for 20-24 hours, then filtering, and washing the natural ore until the pH value of a washing liquor is 8-9.
The natural ore surface after alkali soaking carries a large amount of negative charges, which is beneficial to the adsorption of ionic ammonium. Moreover, the surface structure of the natural ore is changed after the natural ore is soaked in the alkali, so that the ion exchange capacity of the natural ore is improved, and the improvement of the adsorption effect is facilitated. The washed natural ore is alkaline and is a material with negative charges, so that the adsorption effect of ionic ammonium is enhanced. The ammonia nitrogen adsorbent provided by the invention has the highest unit adsorption capacity of 48.38mg/g, and has a good ammonia nitrogen removal effect.
The natural ore comprises the following components in percentage by mass: 28-32% of mordenite, 13-17% of heulandite, 18-22% of chabazite and 33-37% of analcime. The natural ore is prepared by mixing natural zeolites such as chabazite, mordenite and the like, and the natural zeolites have a larger specific surface and certain ion exchange capacity and have a better adsorption effect on ammonia nitrogen.
The pH value of the alkali liquor is more than 14 and less than 15. The alkaline solution can clean the pore passages of the natural ore and enlarge the specific surface area of the natural ore. If the pH is lower than 14, the effect is not significant if the alkali concentration is low. If the alkalinity is too strong, the alkali concentration is too high, the pore channels in the natural ore are occupied by hydroxide radicals, the pore volume is reduced, and the adsorption quantity of ammonia nitrogen is reduced; meanwhile, if the alkali concentration is too high, a large amount of water is needed for subsequent washing, which causes waste.
The alkali liquor is sodium hydroxide solution. The sodium ions can replace some cations with weaker activity on the natural ore, and the adsorption capacity of the natural ore to ammonia nitrogen is further enhanced.
Preferably, 40-60 mL of alkali liquor is correspondingly used for 1g of natural ore.
The method for removing ammonia nitrogen in water adopts the technical scheme that:
a method for removing ammonia nitrogen in a water body comprises the following steps: placing the ammonia nitrogen adsorbent in a water body to be treated for 1-2 days, and then recovering the ammonia nitrogen adsorbent; the ammonia nitrogen adsorbent is the ammonia nitrogen adsorbent.
When the water body to be treated is treated, the ammonia nitrogen adsorbent is alkalescent, so that the environment of the water body to be treated can be adjusted. If the acidic water body is treated, the acidity can be reduced to a certain extent, the pH value of the water body is improved, the adsorption is carried out to a favorable reaction environment, and the adsorption effect is enhanced. The ammonia nitrogen adsorbent of the invention has good adsorption effect when used for treating wastewater. Meanwhile, the recovered ammonia nitrogen adsorbent is regenerated according to a regeneration method in the prior art and then recycled, so that the resource utilization rate is improved.
When the ammonia nitrogen concentration (by the concentration of nitrogen element) in the water body to be treated is 480-520 mg/L, 11.33-12.71 kg of ammonia nitrogen adsorbent is correspondingly used for each cubic of water body to be treated. When the ammonia nitrogen concentration of the water body to be treated is changed, the dosage of the ammonia nitrogen adsorbent is changed in proportion. For example, the dosage of the ammonia nitrogen adsorbent is halved when the concentration is halved.
Detailed Description
The natural ore used in the following examples was provided by Shandong Guangjing environmental science and technology Co., Ltd. and was a powder sieved with 100 mesh (0.15 mm). The paint specifically comprises the following components in percentage by mass: 30% of mordenite, 15% of heulandite, 20% of chabazite and 35% of analcite. The natural ore mixed by the components comprises the following elements in percentage by mass: 7.14%, O: 44.05%, Na: 0.48%, Mg: 0.75%, Al 7.26%, Si: 32.74%, Cl: 1.48%, K: 1.68%, Ca: 2.87%, Fe: 1.55 percent.
The simulated wastewater used in the following examples was prepared by the following method: 23.589g of ammonium sulfate was weighed and dissolved, and the solution was measured to a volume of 500mL, and then 12.5mL was measured to a volume of 250mL, and the solution was prepared so that the concentration of nitrogen (nitrogen in ammonium sulfate) was 500 mg/L.
First, examples of Ammonia Nitrogen adsorbents
Examples 1 to 6
The ammonia nitrogen adsorbent of the present example was prepared by a method comprising the steps of:
(1) preparation of sodium hydroxide solution
Weighing 160g of sodium hydroxide solid, dissolving and metering the volume to a 500mL volumetric flask to obtain 8mol/L sodium hydroxide solution; then, 37.5mL, 50mL, 62.5mL, 75mL, and 87.5mL were measured out in a 100mL volumetric flask and prepared into sodium hydroxide solutions at concentrations of 3mol/L, 4mol/L, 5mol/L, 6mol/L, and 7 mol/L.
(2) Modification of natural ores
20mL of sodium hydroxide solutions with the concentrations of 3mol/L, 4mol/L, 5mol/L, 6mol/L, 7mol/L and 8mol/L are respectively placed in different beakers, then 0.5g of natural ore is respectively added, and the beakers are vibrated for 24 hours in a constant-temperature shaking box (the temperature is 25 +/-1 ℃ and the rotating speed is 120rpm/min) after sealing. And then filtering, washing residual alkali liquor on the natural ore by using distilled water, stopping washing until the pH value of the imbibition is 8-9, and then carrying out vacuum filtration. And then placing the natural ore in a dryer, and naturally airing at room temperature to obtain the ammonia nitrogen adsorbent.
The ammonia nitrogen adsorbent in example 1 is natural ore soaked in 3mol/L sodium hydroxide solution. The ammonia nitrogen adsorbent in the embodiment 2 is natural ore soaked by 4mol/L sodium hydroxide solution. The ammonia nitrogen adsorbent in the embodiment 3 is natural ore soaked by 5mol/L sodium hydroxide solution. The ammonia nitrogen adsorbent in the embodiment 4 is natural ore soaked by 6mol/L sodium hydroxide solution. The ammonia nitrogen adsorbent in example 5 is natural ore soaked by 7mol/L sodium hydroxide solution. The ammonia nitrogen adsorbent in the embodiment 6 is natural ore soaked by 8mol/L sodium hydroxide solution.
Test example 1
The test example tests the isoelectric point of natural ore, and the specific test process is as follows: 0.01mol/L sodium chloride solution is prepared, 70mL is measured and poured into a 100mL beaker. And adjusting the pH value of the solution to be 3-10 by using 0.1mol/L sodium hydroxide solution and 0.1mol/L hydrogen chloride solution. Respectively adding 0.1g of natural ore, placing in a constant temperature shaking box under 298K, and shaking for adsorption for 300 min. The sample was removed and the pH of the solution was measured. The Δ pH (initial pH minus final pH) is plotted on the ordinate and the initial pH on the abscissa, and the intersection point of the curve and the coordinate axis is the isoelectric point. )
Test results show that the isoelectric point of the natural ore used in the invention is 4.5-5, and when the pH of the solution is less than the isoelectric point, the surface of the material is positively charged, so that the adsorption of anions in the solution is facilitated; when the pH value of the solution is larger than the isoelectric point, the surface of the material has negative charges, and the adsorption of cations in the solution is favorable.
Test example 2
Diluting the concentration of nitrogen element in the simulated wastewater to 30mg/L under the environment of 25 +/-2 ℃, preparing wastewater with different pH values by using a hydrogen chloride solution with the concentration of 0.1mol/L and a sodium hydroxide solution with the concentration of 0.1mol/L, placing 0.5g of unmodified natural ore in 20mL of wastewater with different pH values, and sealing. Then shake on a constant temperature shaker for 2 h. After the wastewater is taken out, the concentration of the residual ammonia nitrogen in the wastewater is measured by filtering and sampling, and then the adsorption quantity and the removal rate of nitrogen elements in the ammonia nitrogen are calculated, and the results are shown in table 1.
TABLE 1 Ammonia nitrogen removal Effect of Natural ores under different pH conditions
As shown in Table 1, the material has excellent effect at a pH of 7 to 9. Under alkaline conditions, the concentration of hydrogen ions in the solution is greatly reduced, and the competition of adsorption sites related to ionic ammonium is greatly reduced. The effective adsorption sites of the natural mineral materials are combined with a large amount of ionic ammonium, and the adsorption capacity is increased. If the alkalinity is continuously increased, the ionic ammonium in the water is combined with hydroxide radical to form NH3·H2And (3) O molecules. The adsorption effect of the natural mineral is mainly ion exchange adsorption, and the adsorption effect is assisted, so that the adsorption capacity is larger when the concentration of ammonium radicals is larger. When NH is present3·H2When the O molecule reaches a certain concentration, the adsorption effect of the material is mainly relied on, but the material for removing ammonia nitrogen mainly relies on the ion exchange adsorption effect, so the adsorption quantity is reduced.
Test example 3
The ammonia nitrogen removal capability of the ammonia nitrogen adsorbents of examples 1 to 6 was tested in this test example. The specific method comprises the following steps: adding 20mL of simulated wastewater into six different beakers respectively, then adding 0.1g of ammonia nitrogen adsorbent in the embodiments 1-6 respectively, sealing, and oscillating for 2h on a constant-temperature shaking table. After the wastewater is taken out, the residual ammonia nitrogen concentration in the simulated wastewater is measured by filtering and sampling, and then the adsorption quantity and the removal rate of nitrogen elements in the ammonia nitrogen are calculated, and the results are shown in table 2.
TABLE 2 Ammonia Nitrogen removal Effect of modified Natural ores
| Sample (I) | Unit adsorption amount mg/g | Removal rate% |
| Example 1 | 48.38 | 48.38 |
| Example 2 | 46.40 | 46.40 |
| Example 3 | 46.68 | 46.68 |
| Example 4 | 31.66 | 31.66 |
| Example 5 | 29.76 | 29.76 |
| Example 6 | 42.73 | 42.73 |
As can be seen from Table 2, the ammonia nitrogen adsorbents of examples 1 to 3 had substantially equal adsorption amounts per unit, with little difference. The unit adsorption amount of the ammonia nitrogen adsorbent in example 4 was decreased and was substantially the same as that of the ammonia nitrogen adsorbent in example 5. In example 6, the adsorption amount of the ammonia nitrogen adsorbent is improved, and the unit adsorption amount is 42 mg/g. This is due to: as the alkali concentration increases, the alkali has an effect on the structure of the natural ore. When the alkali concentration is 6mol/L, the pore diameter of the natural ore is occupied by hydroxide ions, the pore volume of the material is reduced, and therefore the adsorption capacity is reduced. But when the concentration is 8mol/L, the concentration of sodium ions in the solution reaches the maximum, and the ion exchange capacity of the material is enhanced, so that the adsorption performance of the natural ore is improved. However, after the high-concentration alkali is adopted for soaking, a large amount of water and a long time are needed for subsequent cleaning, and resource waste is caused. Therefore, when the natural ore is modified by the alkali solution, the concentration of the alkali is preferably 3-5 mol/L.
Second, the embodiment of the method for removing ammonia nitrogen in water
Example 7
The method for removing ammonia nitrogen in the water body comprises the following steps:
(1) placing the ammonia nitrogen adsorbent in the embodiment 1 in a to-be-treated water body with the nitrogen element concentration of 500mg/L in ammonia nitrogen for 1 day (12 kg of ammonia nitrogen adsorbent is used for each cubic to-be-treated water body), and then taking out;
(2) regenerating the taken ammonia nitrogen adsorbent, wherein the specific regeneration method comprises the following steps: mixing the ammonia nitrogen adsorbent with a sodium chloride solution with the concentration of 0.1mol/L according to the weight ratio of 0.1 g: (20-30) mixing in a ratio of mL, placing in a shaking table, shaking for 24 hours at a rotating speed of 120 revolutions per minute, filtering, washing for 1-2 times by using distilled water, and removing water in an environment at 105 ℃ to achieve a regeneration effect;
(3) and (3) repeating the steps (1) to (2) until the ammonia nitrogen content in the water body to be treated meets the requirement.
Claims (7)
1. An ammonia nitrogen adsorbent, characterized by being prepared by a method comprising the steps of: soaking the natural ore in an alkali liquor with the pH value of more than 14 for 20-24 hours, then filtering, and washing the natural ore until the pH value of a washing liquor is 8-9.
2. The ammonia nitrogen adsorbent of claim 1, wherein the natural ore is composed of the following components in percentage by mass: 28-32% of mordenite, 13-17% of heulandite, 18-22% of chabazite and 33-37% of analcime.
3. The ammonia nitrogen adsorbent of claim 1, wherein the pH of the lye is greater than 14 and less than 15.
4. The ammonia nitrogen adsorbent according to any one of claims 1 to 3, wherein the alkali solution is a sodium hydroxide solution.
5. The ammonia nitrogen adsorbent according to any one of claims 1 to 3, wherein 40 to 60mL of alkali solution is used for 1g of natural ore.
6. A method for removing ammonia nitrogen in a water body is characterized by comprising the following steps: placing the ammonia nitrogen adsorbent in a water body to be treated for 1-2 days, and then recovering the ammonia nitrogen adsorbent; the ammonia nitrogen adsorbent is the ammonia nitrogen adsorbent of claims 1 to 5.
7. The method for removing ammonia nitrogen in water bodies according to claim 6, wherein when the concentration of ammonia nitrogen in the water body to be treated is 480-520 mg/L, 11.33-12.71 kg of ammonia nitrogen adsorbent is correspondingly used in each cubic of water body to be treated.
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| CN114632801A (en) * | 2022-03-10 | 2022-06-17 | 湖南博一环保科技有限公司 | Method for carrying out deamination and desulfurization on manganese slag by using rotary kiln |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114632801A (en) * | 2022-03-10 | 2022-06-17 | 湖南博一环保科技有限公司 | Method for carrying out deamination and desulfurization on manganese slag by using rotary kiln |
| CN114632801B (en) * | 2022-03-10 | 2023-07-14 | 湖南博一环保科技有限公司 | Method for deaminizing and desulfurizing manganese slag by using rotary kiln |
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