CN105036427A - Processing method of industrial uranium-containing wastewater - Google Patents
Processing method of industrial uranium-containing wastewater Download PDFInfo
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- CN105036427A CN105036427A CN201510376737.8A CN201510376737A CN105036427A CN 105036427 A CN105036427 A CN 105036427A CN 201510376737 A CN201510376737 A CN 201510376737A CN 105036427 A CN105036427 A CN 105036427A
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- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 177
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 175
- 239000002351 wastewater Substances 0.000 title claims abstract description 108
- 238000003672 processing method Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims abstract description 82
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 68
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 31
- 239000002699 waste material Substances 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 25
- 238000002525 ultrasonication Methods 0.000 claims description 19
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 15
- 229910017604 nitric acid Inorganic materials 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 12
- 230000004044 response Effects 0.000 claims description 10
- 238000000967 suction filtration Methods 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 230000004223 radioprotective effect Effects 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000002829 reductive effect Effects 0.000 abstract description 6
- 239000002893 slag Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000004065 wastewater treatment Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000527 sonication Methods 0.000 description 3
- 238000003911 water pollution Methods 0.000 description 3
- 150000001224 Uranium Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- IZUPBVBPLAPZRR-UHFFFAOYSA-N pentachlorophenol Chemical compound OC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl IZUPBVBPLAPZRR-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- VWIQIIGYDAPONF-UHFFFAOYSA-L uranyl hydroxide Chemical compound O[U](O)(=O)=O VWIQIIGYDAPONF-UHFFFAOYSA-L 0.000 description 2
- 229910021510 uranyl hydroxide Inorganic materials 0.000 description 2
- BFCFYVKQTRLZHA-UHFFFAOYSA-N 1-chloro-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1Cl BFCFYVKQTRLZHA-UHFFFAOYSA-N 0.000 description 1
- TYMLOMAKGOJONV-UHFFFAOYSA-N 4-nitroaniline Chemical compound NC1=CC=C([N+]([O-])=O)C=C1 TYMLOMAKGOJONV-UHFFFAOYSA-N 0.000 description 1
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000003933 environmental pollution control Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002354 radioactive wastewater Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 150000003671 uranium compounds Chemical class 0.000 description 1
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Abstract
The invention relates to a processing method of industrial uranium-containing wastewater. The method comprises steps of adjusting the pH value, carrying out an ultrasonic treatment, and filtering. In the provided method, an ultrasonic wave technology and a zero-valent iron reduction technology are combined, the wastewater processing time is greatly reduced, and the processing time is shortened from 60-100 minutes to 8-20 minutes. Compared with the conventional iron powder uranium removing technology, the addition amount of zero-valent iron powder is reduced by 75%, the slag amount is greatly reduced, the production cost and storage cost are both reduced, moreover, the method can be used in a wide pH range and has strong raw material adaptability, and the wastewater with a high uranium content can meet the discharge standards after being processed by the provided method.
Description
[technical field]
The invention belongs to technical field of wet metallurgy.More specifically, the present invention relates to a kind for the treatment of process of uranium-containing waste water.
[background technology]
The water resources of China is relatively deficient, and the water pollutions be on the rise exacerbates the shortage of water resources, and in numerous water pollutions, Spent Radioactive water pollutions is that environmental pollution is the most serious and endanger maximum pollution type to the mankind.Along with nuclear industry development and nuclear fuel cycle and nuclear technique widespread use increasingly, as uranium mining, uranium smelting, Decommissioning of Uranium Mine And Mill Facilities etc., the quantity of closely-related radioactivity uranium-containing waste water is with it increased gradually.At present, the radionuclide in world's radioactive wastewater enters underground water tissue, causes great impact to industrial or agricultural and human health.
Zero-valent Iron because of chemical property active, have reductive action, Coagulation and Adsorption effect and electrolytic action, it is as a kind of important and effective material of cheapness has been applied in process uranium-bearing polluted-water now.The people such as Zhao Sufen are in " experimental study of Zero-valent Iron process uranium-containing waste water ", " Treatment of Industrial Water ", 7 (31), (2011) in, experimental study has been carried out to zeroth order iron powder process uranium-containing waste water, can reach emission standard after uranium-containing waste water process, but it is large to there is iron powder dosage, processing cost is high, produce the radioactivity quantity of slag large, radioactivity slag is stored and brings great pressure.CN201310475208 adopts Nanoscale Iron process uranium-bearing simulated wastewater, Be very effective, but the method for be uranium-bearing simulated wastewater, there is larger difference in it and uranium-bearing trade effluent, and there is the problem of high, the sad filter of cost.
When ultrasonic wave is propagated in medium, the mechanical effect produced, cavatition and heat effect and produce the series of effects such as mechanics, calorifics and chemistry, especially acoustic cavitation acts on cavitation nucleus instant of detonation and produces localized hyperthermia's hyperbaric environment, and intense impact and high-speed micro-jet erosion are produced to medium, for the chemical reaction being under general condition difficult to realize provides a kind of very special physical environment, open chemical reaction passage, accelerate chemical reaction and carry out.PetrierC, JiangY, LamyMF., " Ultrasoundandenvironment.sonochemicaldestructionofchloro aromaticderivatives ", " Environmentalscience & technology ", 32 (9), (1998); Wenjun WU, " with supersonic gas vibrating technical finesse waste water from dyestuff ", " pollution prevention technique ", 7 (1), (1994), ultrasonic technology is applied to the organism of degraded in waste water by CN200810010379 etc., and its mechanism is mainly based on ultrasound cavitation effect and a series of free-radical oxidns reactions of causing thus.The people such as Hu Wenyong, " experimental study of ultrasonic wave/Zero-valent Iron degraded p-Nitroaniline ", " Techniques and Equipment for Environmental Pollution Control ", 3 (6), (2005), Hu Wenyong, Zheng Zheng, the research of Zero-valent Iron process nitro-chlorobenzene waste water " under the ultrasonic irradiation ", " process water and waste water ", 4 (36), (2005), Song Yong, Dai Youzhi, " preliminary study of ultrasonic wave and Zero-valent Iron combined degradation pentachlorophenol ", " Hunan Institute Of Engineering's journal ", 2 (15), (2005) organism in ultrasonic wave and Zero-valent Iron co-treating wastewater is adopted, its effect is better than adopting separately ultrasonic wave or Zero-valent Iron, but in the article of Zero-valent Iron process uranium-containing waste water, there is not been reported by ultrasonic applications.
The present invention is directed to the technological deficiency that prior art exists, adopt ultrasonic wave and Zero-valent Iron synergy, solve prior art defect, achieve the utilization of resources, cost-saving, be conducive to environment protection.
[summary of the invention]
[technical problem that will solve]
The object of this invention is to provide a kind for the treatment of process of industrial uranium-containing waste water.
[technical scheme]
The present invention is achieved through the following technical solutions.
A kind for the treatment of process of industrial uranium-containing waste water.
The step of this treatment process is as follows:
A, adjust ph
Under the condition stirred, in the industrial uranium-containing waste water of removing solid sundries, drip nitric acid or aqueous sodium hydroxide solution, the pH value of described industrial uranium-containing waste water is adjusted to 3 ~ 7, obtains a kind of industrial uranium-containing waste water regulating pH;
B, ultrasonication
According in rise industrial uranium-containing waste water with in the ratio of gram iron powder for 0.5 ~ 15:1, iron powder is added in the industrial uranium-containing waste water of the adjustment pH obtained in step, mixing, open ultrasonic response device again, under the condition of room temperature and stirring, carry out ultrasonication, obtain a kind of supersound process industry uranium-containing waste water;
C, filtration
The supersound process industry uranium-containing waste water allowing step B obtain carries out suction filtration, obtains a kind of clear liquid and a kind of uranium-bearing waste residue; Described uranium-bearing waste residue obtains uranium-bearing product through conventional uranium chemical treatment; The treated standard " uranium processing specifies with the radio-protective of fuel making facility " that reaches of described clear liquid is discharged afterwards.
A preferred embodiment of the invention, in step, described industrial uranium-containing waste water uranium-bearing 50 ~ 20000 μ gU/L, pH value is 1 ~ 12.
According to another kind of preferred implementation of the present invention, in step, the concentration of described nitric acid be by weight 50 ~ 70% or the concentration of aqueous sodium hydroxide solution be by weight 30 ~ 99%.
According to another kind of preferred implementation of the present invention, in stepb, the Zero-valent Iron content of described iron powder is by weight 50 ~ 98%.
According to another kind of preferred implementation of the present invention, in stepb, the granularity of described iron powder is 80 ~ 120 orders.
According to another kind of preferred implementation of the present invention, in stepb, described stir speed (S.S.) is 120 ~ 180rpm.
According to another kind of preferred implementation of the present invention, in stepb, described supersound process is carried out under the condition of ultrasonic power 80 ~ 2000W and ultrasonic frequency 20 ~ 26KHz.
According to another kind of preferred implementation of the present invention, in stepb, described ultrasonic treatment time is 5 ~ 20min.
According to another kind of preferred implementation of the present invention, in step C, uranium-bearing waste residue method for subsequent processing stores up according to National Hazard waste management system..
According to another kind of preferred implementation of the present invention, in step C, described clear liquid treatment process to be returned by described clear liquid according to the requirement of uranium hydrometallurgical plants flow process water to recycle.
In more detail the present invention will be described below.
The present invention relates to a kind for the treatment of process of industrial uranium-containing waste water.
The step of this treatment process is as follows:
A, adjust ph
Under the condition stirred, in the industrial uranium-containing waste water of removing solid sundries, drip nitric acid or aqueous sodium hydroxide solution, the pH value of described industrial uranium-containing waste water is adjusted to 3 ~ 7, obtains a kind of industrial uranium-containing waste water regulating pH;
In the present invention, described industrial uranium-containing waste water contains 50 ~ 20000 μ gU/L, pH value is 1 ~ 12, and they are mainly from the waste water of uranium hydrometallurgical plants, to prepare etc. the comprehensive waste water of section comprising uranium ore leaching, solid-liquid separation, extracting and separating, uranium compound.Uranium content after described industrial uranium-containing waste water process adopts inductive coupling plasma emission spectrograph to measure.PH value uses the pH meter sold with trade(brand)name PHS-3E type pH meter by Shanghai INESA Scientific Instrument Co., Ltd. to measure.
In the present invention, when the uranium concentration of described industrial uranium-containing waste water is less than 50 μ gU/L, then just emission standard can be reached without the need to process; When the uranium concentration of described industrial uranium-containing waste water is greater than 20000 μ gU/L, then uranium content is too high, returns uranium extraction workshop section and carries out the process of recovery uranium, reduces the loss of uranium, improves the recovery utilization rate of uranium; Therefore, this uranium concentration is 50 ~ 20000 μ gU/L is suitable, preferably 500 ~ 2000 μ gU/L.
In this step, when using nitric acid, its concentration is by weight 50 ~ 70%.If this concentration lower than 50% time, then can consume a large amount of nitric acid, also be unfavorable for the adjustment of pH; If this concentration higher than 70% time, then concentration of nitric acid is too high and volatilization is serious, causes the waste of nitric acid, and has a strong impact on operating environment; Concentration of nitric acid is preferably 55 ~ 65%, and more preferably 58 ~ 62%.
Or when using sodium hydroxide, its concentration is by weight 30 ~ 99%.If this concentration lower than 30% time, then can improve the usage quantity of sodium hydroxide, increase the quantity of slag; If this concentration higher than 99% time, its sodium hydroxide selling at exorbitant prices, increase cost for wastewater treatment; Naoh concentration is preferably 40 ~ 85%, and more preferably 52 ~ 72%.
It is appropriate that the pH value of described industrial uranium-containing waste water is adjusted to 3 ~ 7, if pH value regulates be less than 3, then consumes nitric acid too much, increases processing cost, be also unfavorable for environmental protection; Because uranyl hydroxide has amphoteric properties, if pH value regulates be greater than 7, uranyl hydroxide can form UO
4 2-and U
2o
7 2-plasma, uranium is got back in solution again, and impact is except uranium effect; Preferably 3.6 ~ 6.4, more preferably 4.0 ~ 5.6.
B, ultrasonication
According in rise industrial uranium-containing waste water with in the ratio of gram iron powder for 0.5 ~ 15:1, iron powder is added in the industrial uranium-containing waste water of the adjustment pH obtained in step, mixing, open ultrasonic response device again, under the condition of room temperature and stirring, carry out ultrasonication, obtain a kind of supersound process industry uranium-containing waste water;
In the present invention, the Zero-valent Iron content of described iron powder is by weight 50 ~ 98%.If Zero-valent Iron content is less than 50%, then iron powder add-on can be made to increase, increase the quantity of slag; If Zero-valent Iron content is higher than 98%, its selling at exorbitant prices, increases cost for wastewater treatment; Therefore, Zero-valent Iron content is 50 ~ 98% is suitable, preferably 60 ~ 88%, more preferably 65 ~ 82%.
The granularity of described iron powder is 80 ~ 120 orders.Iron particle size or high or low be all disadvantageous because iron particle size is meticulous can increase ore grinding cost, granularity excessively slightly there will be reaction not exclusively, causes the increase that iron powder consumes.
In the present invention, the ratio of industrial uranium-containing waste water and iron powder is less than 0.5:1, then the iron powder that adds can be made excessive, cause the waste of iron powder; The ratio of industry uranium-containing waste water and iron powder is greater than 15:1, then there will be iron powder add-on not enough, and impact is except uranium effect; Therefore the ratio of industrial uranium-containing waste water and iron powder is 0.5 ~ 15:1 is favourable, preferably 2 ~ 12:1, more preferably 5 ~ 10:1.
In this step, industrial uranium-containing waste water and iron powder are at stir speed (S.S.) 120 ~ 180rpm, and described supersound process is ultrasonication 5 ~ 60min under the condition of ultrasonic power 80 ~ 2000W and ultrasonic frequency 20 ~ 26KHz.
In the present invention, within the scope of described ultrasonic frequency and ultrasonic treatment time, if ultrasonic power is less than 80W, then ultrasonic wave is inoperative; If ultrasonic wave is greater than 2000W, then ultrasonic power density can be made too high, cause the waste of the energy, increase power consumption; Therefore ultrasonic power is 80 ~ 2000W is appropriate, preferably 380 ~ 1600W, more preferably 680 ~ 820W.
Similarly, within the scope of described ultrasonic power and ultrasonic treatment time, if ultrasonic frequency is less than 20KHz, then frequency exceeds ultrasonic frequency category; If ultrasonic frequency is greater than 26KHz, then can affect ul-trasonic irradiation effect; Therefore, ultrasonic frequency is 20 ~ 26KHz is rational, preferably 22 ~ 25KHz, more preferably 23 ~ 24KHz.
In described ultrasonic power and ultrasonic frequency range, if sonication treatment time is less than 5min, then except uranium process does not complete; If sonication treatment time is longer than 20min, except uranium process complete after increase power consumption, improve cost for wastewater treatment; Therefore, sonication treatment time is 5 ~ 20min is rational, preferably 6 ~ 18min, more preferably 8 ~ 16min.
The ultrasonic response device that the present invention uses is extensive product sold in the market.
C, filtration
The supersound process industry uranium-containing waste water allowing step B obtain carries out suction filtration, obtains a kind of clear liquid and a kind of uranium-bearing waste residue; Described uranium-bearing waste residue obtains uranium-bearing product through conventional uranium chemical treatment; The treated standard " uranium processing specifies with the radio-protective of fuel making facility " (EJ1056-2005) that reaches of described clear liquid is discharged afterwards.
Described conventional uranium chemical treatment is for example, see the treatment process that describes of document (people such as Lu Yan, " brief talking uranium-containing waste water treatment technology ", " industrial technology ", 2014,43 (6): 33-36).
In this step, uranium-bearing waste residue method for subsequent processing can also be store up according to National Hazard waste management system.
Described clear liquid treatment process to be returned by described clear liquid according to the requirement of uranium hydrometallurgical plants flow process water to recycle.
[beneficial effect]
The invention has the beneficial effects as follows:
I, the present invention adopt ultrasonic technology to combine with Zero-valent Iron reduction technique, shorten the wastewater treatment time greatly, are reduced to 5-20min of the present invention by conventional processing time 60-100min in prior art; With conventional iron powder except compared with uranium technology, reduce zeroth order iron powder input amount 75%, its quantity of slag is corresponding minimizing also, production cost and store up cost and reduce;
II, this uranium-containing waste water technique, processed waste water, without the need to standing process, directly can carry out suction filtration operation, and the process time shortens, and avoids installing settling bowl, reduces floor space;
III, ultrasonic equipment are simple, easy to operate;
IV, the method suitability are strong, after treatment can qualified discharge for high uranium content waste water.
[accompanying drawing explanation]
Fig. 1 is the present invention's industry uranium-containing waste water process flow figure.
[embodiment]
The present invention can be understood better by following embodiment.
Embodiment 1: the process of industrial uranium-containing waste water
The concrete treatment scheme of this embodiment as shown in Figure 1.The implementation step of this embodiment is as follows:
A, adjust ph
Under the condition stirred, toward removing solid sundries, drip the aqueous nitric acid that concentration is by weight 62% in the industrial uranium-containing waste water of 2000 μ gU/L, pH value 5.0, the pH value of described industrial uranium-containing waste water is adjusted to 3.0, obtains a kind of industrial uranium-containing waste water regulating pH;
B, ultrasonication
According in rise industrial uranium-containing waste water with in the ratio of gram iron powder for 5.0:1, the iron powder that Zero-valent Iron content is by weight 65% is added in the industrial uranium-containing waste water of the adjustment pH obtained in step, mixing, open ultrasonic response device again, under the condition that room temperature and 120rpm stir and under the condition of ultrasonic power 380W and ultrasonic frequency 20KHz, carry out ultrasonication 40min, obtain a kind of supersound process industry uranium-containing waste water;
C, filtration
The supersound process industry uranium-containing waste water allowing step B obtain carries out suction filtration, obtains a kind of clear liquid and a kind of uranium-bearing waste residue; Described uranium-bearing waste residue obtains uranium-bearing product through conventional uranium chemical treatment; Described clear liquid uranium content is after treatment 15.2 μ g/L, lower than the 50 μ g/L that standard " uranium processing specifies with the radio-protective of fuel making facility " (EJ1056-2005) specifies.
Embodiment 2: the process of industrial uranium-containing waste water
The concrete treatment scheme of this embodiment as shown in Figure 1.The implementation step of this embodiment is as follows:
A, adjust ph
Under the condition stirred, toward removing solid sundries, drip the aqueous sodium hydroxide solution that concentration is by weight 30% in the industrial uranium-containing waste water of 50 μ gU/L, pH value 1.0, the pH value of described industrial uranium-containing waste water is adjusted to 3.6, obtains a kind of industrial uranium-containing waste water regulating pH;
B, ultrasonication
According in rise industrial uranium-containing waste water with in the ratio of gram iron powder for 10.0:1, add in the industrial uranium-containing waste water of the adjustment pH obtained in step Zero-valent Iron content be by weight 82% iron powder, mixing, open ultrasonic response device again, under the condition that room temperature and 130rpm stir and under the condition of ultrasonic power 1600W and ultrasonic frequency 22KHz, carry out ultrasonication 60min, obtain a kind of supersound process industry uranium-containing waste water;
C, filtration
The supersound process industry uranium-containing waste water allowing step B obtain carries out suction filtration, obtains a kind of clear liquid and a kind of uranium-bearing waste residue; Described uranium-bearing waste residue is stored up according to National Hazard waste management system; Described clear liquid uranium content is 4.1 μ g/L, lower than the 50 μ g/L that standard " uranium processing specifies with the radio-protective of fuel making facility " (EJ1056-2005) specifies, and discharge.
Embodiment 3: the process of industrial uranium-containing waste water
The concrete treatment scheme of this embodiment as shown in Figure 1.The implementation step of this embodiment is as follows:
A, adjust ph
Under the condition stirred, toward removing solid sundries, drip the aqueous nitric acid that concentration is by weight 70% in the industrial uranium-containing waste water of 500 μ gU/L, pH value 12, the pH value of described industrial uranium-containing waste water is adjusted to 6.4, obtains a kind of industrial uranium-containing waste water regulating pH;
B, ultrasonication
According in rise industrial uranium-containing waste water with in the ratio of gram iron powder for 0.5:1, the iron powder that Zero-valent Iron content is by weight 50% is added in the industrial uranium-containing waste water of the adjustment pH obtained in step, mixing, open ultrasonic response device again, under the condition that room temperature and 140rpm stir and under the condition of ultrasonic power 80W and ultrasonic frequency 25KHz, carry out ultrasonication 20min, obtain a kind of supersound process industry uranium-containing waste water;
C, filtration
The supersound process industry uranium-containing waste water allowing step B obtain carries out suction filtration, obtains a kind of clear liquid and a kind of uranium-bearing waste residue; Described uranium-bearing waste residue obtains uranium-bearing product through conventional uranium chemical treatment; Described clear liquid uranium content is 10.49 μ g/L, lower than the 50 μ g/L that standard " uranium processing specifies with the radio-protective of fuel making facility " (EJ1056-2005) specifies, and discharge.
Embodiment 4: the process of industrial uranium-containing waste water
The concrete treatment scheme of this embodiment as shown in Figure 1.The implementation step of this embodiment is as follows:
A, adjust ph
Under the condition stirred, toward removing solid sundries, drip the aqueous nitric acid that concentration is by weight 50% in the industrial uranium-containing waste water of 20000 μ gU/L, pH value 8.2, the pH value of described industrial uranium-containing waste water is adjusted to 7.0, obtains a kind of industrial uranium-containing waste water regulating pH;
B, ultrasonication
According in rise industrial uranium-containing waste water with in the ratio of gram iron powder for 2.0:1, add in the industrial uranium-containing waste water of the adjustment pH obtained in step Zero-valent Iron content be by weight 98% iron powder, mixing, open ultrasonic response device again, under the condition that room temperature and 170rpm stir and under the condition of ultrasonic power 680W and ultrasonic frequency 26KHz, carry out ultrasonication 60min, obtain a kind of supersound process industry uranium-containing waste water;
C, filtration
The supersound process industry uranium-containing waste water allowing step B obtain carries out suction filtration, obtains a kind of clear liquid and a kind of uranium-bearing waste residue; Described uranium-bearing waste residue is stored up according to National Hazard waste management system; Described clear liquid uranium content is 31.34 μ g/L, lower than the 50 μ g/L that standard " uranium processing specifies with the radio-protective of fuel making facility " (EJ1056-2005) specifies, and discharge.
Embodiment 5: the process of industrial uranium-containing waste water
The concrete treatment scheme of this embodiment as shown in Figure 1.The implementation step of this embodiment is as follows:
A, adjust ph
Under the condition stirred, toward removing solid sundries, drip the aqueous nitric acid that concentration is by weight 70% in the industrial uranium-containing waste water of 10000 μ gU/L, pH value 10.1, the pH value of described industrial uranium-containing waste water is adjusted to 4.0, obtains a kind of industrial uranium-containing waste water regulating pH;
B, ultrasonication
According in rise industrial uranium-containing waste water with in the ratio of gram iron powder for 12.0:1, add in the industrial uranium-containing waste water of the adjustment pH obtained in step Zero-valent Iron content be by weight 60% iron powder, mixing, open ultrasonic response device again, under the condition that room temperature and 60rpm stir and under the condition of ultrasonic power 820W and ultrasonic frequency 23KHz, carry out ultrasonication 50min, obtain a kind of supersound process industry uranium-containing waste water;
C, filtration
The supersound process industry uranium-containing waste water allowing step B obtain carries out suction filtration, obtains a kind of clear liquid and a kind of uranium-bearing waste residue; Described uranium-bearing waste residue obtains uranium-bearing product through conventional uranium chemical treatment; Described clear liquid uranium content is 40.21 μ g/L, lower than the 50 μ g/L that standard " uranium processing specifies with the radio-protective of fuel making facility " (EJ1056-2005) specifies, and discharge.
Embodiment 6: the process of industrial uranium-containing waste water
The concrete treatment scheme of this embodiment as shown in Figure 1.The implementation step of this embodiment is as follows:
A, adjust ph
Under the condition stirred, toward removing solid sundries, drip the aqueous sodium hydroxide solution that concentration is by weight 99% in the industrial uranium-containing waste water of 6000 μ gU/L, pH value 4.2, the pH value of described industrial uranium-containing waste water is adjusted to 5.6, obtains a kind of industrial uranium-containing waste water regulating pH;
B, ultrasonication
According in rise industrial uranium-containing waste water with in the ratio of gram iron powder for 15:1, add in the industrial uranium-containing waste water of the adjustment pH obtained in step Zero-valent Iron content be by weight 88% iron powder, mixing, open ultrasonic response device again, under the condition that room temperature and 180rpm stir and under the condition of ultrasonic power 2000W and ultrasonic frequency 24KHz, carry out ultrasonication 5min, obtain a kind of supersound process industry uranium-containing waste water;
C, filtration
The supersound process industry uranium-containing waste water allowing step B obtain carries out suction filtration, obtains a kind of clear liquid and a kind of uranium-bearing waste residue; Described uranium-bearing waste residue is stored up according to National Hazard waste management system; Described clear liquid uranium content is 32.54 μ g/L, lower than the 50 μ g/L that standard " uranium processing specifies with the radio-protective of fuel making facility " (EJ1056-2005) specifies, and discharge.
Claims (10)
1. a treatment process for industrial uranium-containing waste water, is characterized in that the step of this treatment process is as follows:
A, adjust ph
Under the condition stirred, in the industrial uranium-containing waste water of removing solid sundries, drip nitric acid or aqueous sodium hydroxide solution, the pH value of described industrial uranium-containing waste water is adjusted to 3 ~ 7, obtains a kind of industrial uranium-containing waste water regulating pH;
B, ultrasonication
According in rise industrial uranium-containing waste water with in the ratio of gram iron powder for 0.5 ~ 15:1, iron powder is added in the industrial uranium-containing waste water of the adjustment pH obtained in step, mixing, open ultrasonic response device again, under the condition of room temperature and stirring, carry out ultrasonication, obtain a kind of supersound process industry uranium-containing waste water;
C, filtration
The supersound process industry uranium-containing waste water allowing step B obtain carries out suction filtration, obtains a kind of clear liquid and a kind of uranium-bearing waste residue; Described uranium-bearing waste residue obtains uranium-bearing product through conventional uranium chemical treatment; The treated standard " uranium processing specifies with the radio-protective of fuel making facility " that reaches of described clear liquid is discharged afterwards.
2. treatment process according to claim 1, is characterized in that in step, and described industrial uranium-containing waste water uranium-bearing 50 ~ 20000 μ g/L, pH value is 1 ~ 12.
3. treatment process according to claim 1, is characterized in that in step, and the concentration of described nitric acid is by weight 50 ~ 70%; The concentration of aqueous sodium hydroxide solution is by weight 30 ~ 99%.
4. treatment process according to claim 1, is characterized in that in stepb, and the Zero-valent Iron content of described iron powder is by weight 50 ~ 98%.
5. treatment process according to claim 1, is characterized in that in stepb, and the granularity of described iron powder is 80 ~ 120 orders.
6. treatment process according to claim 1, is characterized in that in stepb, and described stir speed (S.S.) is 120 ~ 180rpm.
7. treatment process according to claim 1, is characterized in that in stepb, and described supersound process is carried out under the condition of ultrasonic power 80 ~ 2000W and ultrasonic frequency 20 ~ 26KHz.
8. treatment process according to claim 1, is characterized in that in stepb, and described ultrasonic treatment time is 5 ~ 20.
9. treatment process according to claim 1, is characterized in that in step C, and uranium-bearing waste residue method for subsequent processing stores up according to National Hazard waste management system.
10. treatment process according to claim 1, is characterized in that in step C, and described clear liquid treatment process to be returned by described clear liquid according to the requirement of uranium hydrometallurgical plants flow process water to recycle.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106401510A (en) * | 2016-09-13 | 2017-02-15 | 中核通辽铀业有限责任公司 | Method for recycling well flushing waste water in in-situ leaching uranium exploration |
| CN108188410A (en) * | 2018-01-26 | 2018-06-22 | 东华理工大学 | The minimizing technology of sexavalence uranium ion in a kind of Zero-valence transition metal and preparation method thereof and aqueous solution |
| CN108205009A (en) * | 2017-12-18 | 2018-06-26 | 中核北方核燃料元件有限公司 | The assay method of uranium content in a kind of spheric fuel element |
| CN116282611A (en) * | 2021-12-17 | 2023-06-23 | 昆明理工大学 | Method for treating industrial high-salt uranium-containing wastewater |
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| CN103523973A (en) * | 2013-10-13 | 2014-01-22 | 陕西盛迈石油有限公司 | Electroplating wastewater treatment method |
| CN104386865A (en) * | 2014-10-10 | 2015-03-04 | 昆明理工大学 | Method for treating uranium-containing waste water |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401510A (en) * | 2016-09-13 | 2017-02-15 | 中核通辽铀业有限责任公司 | Method for recycling well flushing waste water in in-situ leaching uranium exploration |
| CN106401510B (en) * | 2016-09-13 | 2019-01-08 | 中核通辽铀业有限责任公司 | The method that ground-dipping uranium extraction well-flushing waste water recycles |
| CN108205009A (en) * | 2017-12-18 | 2018-06-26 | 中核北方核燃料元件有限公司 | The assay method of uranium content in a kind of spheric fuel element |
| CN108188410A (en) * | 2018-01-26 | 2018-06-22 | 东华理工大学 | The minimizing technology of sexavalence uranium ion in a kind of Zero-valence transition metal and preparation method thereof and aqueous solution |
| CN116282611A (en) * | 2021-12-17 | 2023-06-23 | 昆明理工大学 | Method for treating industrial high-salt uranium-containing wastewater |
| CN116282611B (en) * | 2021-12-17 | 2024-05-14 | 昆明理工大学 | Method for treating industrial high-salt uranium-containing wastewater |
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