CN112759110A - Circulation method of uranium-containing fluorine-containing wastewater - Google Patents
Circulation method of uranium-containing fluorine-containing wastewater Download PDFInfo
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- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 41
- 239000011737 fluorine Substances 0.000 title claims abstract description 41
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 32
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000002351 wastewater Substances 0.000 title claims abstract description 31
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims abstract description 58
- 229910000027 potassium carbonate Inorganic materials 0.000 claims abstract description 29
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims abstract description 15
- 238000001556 precipitation Methods 0.000 claims abstract description 14
- 230000020477 pH reduction Effects 0.000 claims abstract description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 36
- 238000002386 leaching Methods 0.000 claims description 26
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 17
- 239000002893 slag Substances 0.000 claims description 13
- 239000012452 mother liquor Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 9
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 8
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 8
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 8
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 claims description 8
- 239000011698 potassium fluoride Substances 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 8
- 125000005289 uranyl group Chemical group 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 7
- -1 uranyl potassium tricarbonate Chemical compound 0.000 claims description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000920 calcium hydroxide Substances 0.000 claims description 6
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 5
- 230000001172 regenerating effect Effects 0.000 claims description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 235000003270 potassium fluoride Nutrition 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 4
- 239000002912 waste gas Substances 0.000 claims description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 239000002354 radioactive wastewater Substances 0.000 abstract description 3
- 238000006115 defluorination reaction Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 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
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- 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
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- 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
- C02F2001/007—Processes including a sedimentation step
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- 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
- C02F2101/006—Radioactive compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
- C02F2101/14—Fluorine or fluorine-containing compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
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Abstract
The invention belongs to the technical field of radioactive wastewater treatment, and particularly relates to a circulation method of uranium-containing fluorine-containing wastewater. Through the circulation process flow, the potassium carbonate solution of 200g/L is leached, acidified, precipitated and transformed to obtain the solution containing the potassium carbonate medium of 120 g/L. The method can recycle the wastewater by controlling the acidification pH value to be 4-5, the precipitation pH value to be 10-11, the defluorination pH value to be 11-12 and the potassium carbonate transformation pH value to be 8-9.
Description
Technical Field
The invention belongs to the technical field of radioactive wastewater treatment, and particularly relates to a circulation method of uranium-containing fluorine-containing wastewater.
Background
At present, domestic related enterprises mainly adopt two process flows for treating the wastewater.
1. Resin adsorption process
Absorbing tail gas containing uranium and fluorine by adopting about 5 percent of sodium carbonate as leacheate, recovering uranium by using an ion exchange method and an extraction method when the concentration of uranium and fluorine ions in the leacheate reaches a specified value, treating tail water after adsorption by using calcium hydroxide, removing fluorine ions and trace uranium, and discharging after reaching the standard.
2. Alkaline precipitation process
Absorbing tail gas containing uranium and fluorine by adopting about 5 percent of sodium carbonate as leacheate, acidifying the leacheate by using production waste acid after the concentration of fluorine ions in the leacheate reaches a specified value and adding sodium hydroxide to form sodium diuranate precipitate and recover uranium, removing fluorine from precipitated mother liquor by using carbide slag (calcium hydroxide), and performing deep fluorine removal and uranium removal according to the content of fluorine and uranium in waste water and then discharging the tail gas up to the standard.
The leaching medium adopted in the two process flows has the concentration of 5% sodium carbonate, the content of the effective carbonate is low, the leaching solution is frequently replaced, the amount of generated wastewater is large, and the wastewater needs to be discharged after final treatment.
Disclosure of Invention
Aiming at the defects, the invention aims to provide a recycling method of uranium-containing fluorine-containing wastewater, wherein leaching media of the uranium-containing fluorine-containing radioactive wastewater are replaced by potassium carbonate, and the leached wastewater is transformed into potassium carbonate solution through carbon dioxide after uranium and fluorine are removed and then is returned to a production line for re-leaching, so that wastewater recycling is realized, and the amount of discharged wastewater is reduced.
The technical scheme of the invention is as follows:
a circulation method of uranium-containing fluorine-containing wastewater comprises the steps of first step, alkali leaching, second step, acidification, third step, precipitation, fourth step, fluoride removal of carbide slag, and fifth step, regeneration of potassium carbonate;
firstly, leaching with alkali;
the leaching medium is potassium carbonate solution, 200g/L potassium carbonate solution is prepared according to the concentration of the returned regenerated potassium carbonate solution, uranium and fluorine-containing waste gas is leached to generate uranyl potassium tricarbonate and potassium fluoride, the replacement pH value of leaching liquid is controlled within the range of 7-8, and the following reactions are involved:
UF6+2H2O＝UO2F2+4HF
2F2+2H2O＝4HF+O2↑
2HF+K2CO3＝2KF+CO2↑+H2O
UO2F2+3K2CO3＝K4[UO2(CO3)3]+2KF
step two, acidification;
the waste hydrofluoric acid of the production line is reacted with the wastewater to be treated to remove carbonate in the wastewater, the pH value is controlled to be 4-5, and the method relates to the following reaction:
K4[UO2(CO3)3]+6HF＝UO2F2+4KF+3CO2↑+3H2O
K2CO3+2HF＝2KF+CO2↑+H2O
step three, precipitation;
adding potassium hydroxide into the waste liquid after the carbonate radical is removed to precipitate uranium in a potassium diuranate form, controlling the pH value to be 10-11, and relating to the following reaction:
2UO2F2+6KOH＝K2U2O7↓+3H2O+4KF
step four, removing fluorine from the carbide slag;
adding carbide slag into the precipitation mother liquor, precipitating fluorine in a calcium fluoride form, filtering and removing the fluorine, controlling the pH value to be 11-12, and involving the following reactions:
KF+Ca(OH)2＝CaF2↓+KOH
step five, regenerating potassium carbonate;
and introducing carbon dioxide gas into the defluorinated mother liquor to convert potassium hydroxide into potassium carbonate, returning to leaching, and controlling the pH value to be 8-9, wherein the method relates to the following reaction:
2KOH+CO2＝K2CO3+H2O。
the invention has the beneficial effects that:
1. through the circulation process flow, the potassium carbonate solution of 200g/L is leached, acidified, precipitated and transformed to obtain the solution containing the potassium carbonate medium of 120 g/L.
2. The wastewater can be recycled by controlling the acidification pH value to be 4-5, the precipitation pH value to be 10-11, the defluorination pH value to be 11-12 and the potassium carbonate transformation pH value to be 8-9.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A circulation method of uranium-containing fluorine-containing wastewater comprises the steps of first step, alkali leaching, second step, acidification, third step, precipitation, fourth step, fluoride removal of carbide slag, and fifth step, regeneration of potassium carbonate;
step one, alkaline leaching;
leaching medium is potassium carbonate solution, preparing about 200g/L potassium carbonate solution according to the concentration of the returned regenerated potassium carbonate solution, leaching uranium-containing and fluorine-containing waste gas to generate uranyl potassium tricarbonate and potassium fluoride, controlling the replacement pH value of leaching solution to be in the range of 7-8, and relating to the following reaction:
UF6+2H2O＝UO2F2+4HF
2F2+2H2O＝4HF+O2↑
2HF+K2CO3＝2KF+CO2↑+H2O
UO2F2+3K2CO3＝K4[UO2(CO3)3]+2KF
step two, acidification;
the waste hydrofluoric acid of the production line is reacted with the wastewater to be treated to remove carbonate in the wastewater, the pH value is controlled to be 4-5, and the method relates to the following reaction:
K4[UO2(CO3)3]+6HF＝UO2F2+4KF+3CO2↑+3H2O
K2CO3+2HF＝2KF+CO2↑+H2O
step three, precipitation;
adding potassium hydroxide into the waste liquid after the carbonate radical is removed to precipitate uranium in a potassium diuranate form, controlling the pH value to be 10-11, and relating to the following reaction:
2UO2F2+6KOH＝K2U2O7↓+3H2O+4KF
step four, removing fluorine from the carbide slag;
adding carbide slag into the precipitation mother liquor, precipitating fluorine in a calcium fluoride form, filtering and removing the fluorine, controlling the pH value to be 11-12, and involving the following reactions:
KF+Ca(OH)2＝CaF2↓+KOH
step five, regenerating potassium carbonate;
and introducing carbon dioxide gas into the defluorinated mother liquor to convert potassium hydroxide into potassium carbonate, returning to leaching, and controlling the pH value to be 8-9, wherein the method relates to the following reaction:
2KOH+CO2＝K2CO3+H2O
in the drawings of the disclosed embodiments of the invention, only methods related to the disclosed embodiments are referred to, other methods can refer to common design, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
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 are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. A circulation method of uranium-containing fluorine-containing wastewater comprises the steps of first step, alkali leaching, second step, acidification, third step, precipitation, fourth step, fluoride removal of carbide slag, and fifth step, regeneration of potassium carbonate;
the method is characterized in that:
step one, alkaline leaching;
leaching the regenerated potassium carbonate solution to obtain a 200g/L potassium carbonate solution, leaching the uranium-containing and fluorine-containing waste gas to generate uranyl potassium tricarbonate and potassium fluoride, wherein the leaching medium is a potassium carbonate solution, and the reaction is as follows:
UF6+2H2O＝UO2F2+4HF
2F2+2H2O＝4HF+O2↑
2HF+K2CO3＝2KF+CO2↑+H2O
UO2F2+3K2CO3＝K4[UO2(CO3)3]+2KF
step two, acidification;
the waste hydrofluoric acid in the production line is reacted with the waste water to be treated to remove carbonate in the waste water, and the method relates to the following reaction:
K4[UO2(CO3)3]+6HF＝UO2F2+4KF+3CO2↑+3H2O
K2CO3+2HF＝2KF+CO2↑+H2O
step three, precipitation;
adding potassium hydroxide into the waste liquid after the carbonate radical is removed to precipitate uranium in a form of potassium diuranate, and relating to the following reactions:
2UO2F2+6KOH＝K2U2O7↓+3H2O+4KF
step four, removing fluorine from the carbide slag;
adding carbide slag into the precipitation mother liquor to precipitate fluorine in the form of calcium fluoride, and filtering to remove fluorine, wherein the reaction comprises the following steps:
KF+Ca(OH)2＝CaF2↓+KOH
step five, regenerating potassium carbonate;
introducing carbon dioxide gas into the defluorinated mother liquor to convert potassium hydroxide into potassium carbonate, returning to leaching, and relating to the following reactions:
2KOH+CO2＝K2CO3+H2O。
2. the recycling method of uranium-containing fluorine-containing wastewater according to claim 1, characterized in that: and step one, alkaline leaching, and controlling the replacement pH value of the leacheate to be 7-8.
3. The recycling method of uranium-containing fluorine-containing wastewater according to claim 1, characterized in that: and step two, acidifying, and controlling the pH value to be 4-5.
4. The recycling method of uranium-containing fluorine-containing wastewater according to claim 1, characterized in that: and step three, precipitating, and controlling the pH value to be 10-11.
5. The recycling method of uranium-containing fluorine-containing wastewater according to claim 1, characterized in that: and step four, removing fluorine from the carbide slag, and controlling the pH value to be 11-12.
6. The recycling method of uranium-containing fluorine-containing wastewater according to claim 1, characterized in that: and fifthly, regenerating potassium carbonate, and controlling the pH value to be 8-9.
7. The recycling method of uranium-containing fluorine-containing wastewater according to claim 1, characterized in that: firstly, leaching with alkali;
the leaching medium is potassium carbonate solution, 200g/L potassium carbonate solution is prepared according to the concentration of the returned regenerated potassium carbonate solution, uranium and fluorine-containing waste gas is leached to generate uranyl potassium tricarbonate and potassium fluoride, the replacement pH value of leaching liquid is controlled within the range of 7-8, and the following reactions are involved:
UF6+2H2O＝UO2F2+4HF
2F2+2H2O＝4HF+O2↑
2HF+K2CO3＝2KF+CO2↑+H2O
UO2F2+3K2CO3＝K4[UO2(CO3)3]+2KF
step two, acidification;
the waste hydrofluoric acid of the production line is reacted with the wastewater to be treated to remove carbonate in the wastewater, the pH value is controlled to be 4-5, and the method relates to the following reaction:
K4[UO2(CO3)3]+6HF＝UO2F2+4KF+3CO2↑+3H2O
K2CO3+2HF＝2KF+CO2↑+H2O
step three, precipitation;
adding potassium hydroxide into the waste liquid after the carbonate radical is removed to precipitate uranium in a potassium diuranate form, controlling the pH value to be 10-11, and relating to the following reaction:
2UO2F2+6KOH＝K2U2O7↓+3H2O+4KF
step four, removing fluorine from the carbide slag;
adding carbide slag into the precipitation mother liquor, precipitating fluorine in a calcium fluoride form, filtering and removing the fluorine, controlling the pH value to be 11-12, and involving the following reactions:
KF+Ca(OH)2＝CaF2↓+KOH
step five, regenerating potassium carbonate;
and introducing carbon dioxide gas into the defluorinated mother liquor to convert potassium hydroxide into potassium carbonate, returning to leaching, and controlling the pH value to be 8-9, wherein the method relates to the following reaction:
2KOH+CO2＝K2CO3+H2O。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113373681A (en) * | 2021-05-11 | 2021-09-10 | 西南科技大学 | Method for treating nuclear fuel element process wastewater by using polyamine functionalized fiber |
| CN114853208A (en) * | 2022-04-27 | 2022-08-05 | 中陕核工业集团综合分析测试有限公司 | Method for harmless treatment and resource utilization of associated mine radioactive acidic wastewater |
| CN117551894A (en) * | 2023-10-31 | 2024-02-13 | 湖南中核金原新材料有限责任公司 | Method for improving uranium leaching rate in extraction residues of tantalum-niobium ores |
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| CN113373681A (en) * | 2021-05-11 | 2021-09-10 | 西南科技大学 | Method for treating nuclear fuel element process wastewater by using polyamine functionalized fiber |
| CN114853208A (en) * | 2022-04-27 | 2022-08-05 | 中陕核工业集团综合分析测试有限公司 | Method for harmless treatment and resource utilization of associated mine radioactive acidic wastewater |
| CN117551894A (en) * | 2023-10-31 | 2024-02-13 | 湖南中核金原新材料有限责任公司 | Method for improving uranium leaching rate in extraction residues of tantalum-niobium ores |
| CN117551894B (en) * | 2023-10-31 | 2024-04-09 | 湖南中核金原新材料有限责任公司 | Method for improving uranium leaching rate in extraction residues of tantalum-niobium ores |
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