CN103151088A - Composite flocculating agent for processing radioactive elements iron, cobalt, manganese and silver in nuclear waste water and processing method - Google Patents
Composite flocculating agent for processing radioactive elements iron, cobalt, manganese and silver in nuclear waste water and processing method Download PDFInfo
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- CN103151088A CN103151088A CN2013101056175A CN201310105617A CN103151088A CN 103151088 A CN103151088 A CN 103151088A CN 2013101056175 A CN2013101056175 A CN 2013101056175A CN 201310105617 A CN201310105617 A CN 201310105617A CN 103151088 A CN103151088 A CN 103151088A
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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
- C02F1/52—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
- C02F1/56—Macromolecular compounds
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/10—Processing by flocculation
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/28—Treating solids
- G21F9/34—Disposal of solid waste
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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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- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a composite flocculating agent for processing radioactive elements iron, cobalt, manganese and silver in nuclear waste water and a processing method, which belongs to the technical field of the nuclear waste water treatment. The composite flocculating agent consists of a chemical precipitator and an organic polymer flocculating agent, wherein the chemical precipitator is one or combination of more than one of potassium permanganate, sodium sulfide, sodium carbonate and sodium hydroxide; the organic polymer flocculating agent is polyacrylamide, sodium polyacrylate and/or dimethyl diallyl ammonium chloride; and the processing method comprises the following steps of configuring the composite flocculating agent, charging the composite flocculating agent, regulating a pH value of the solution, mixing, flocculating and filtering. Due to the adoption of the composite flocculating agent and the processing method, multiple radioactive element ions of ultralow trace concentration in the nuclear waste water can be efficiently removed, and advantages such as rapidness and high efficiency in reaction process, charging in one step and little dangerous chemical sludge can be realized.
Description
Technical field
The invention belongs to the nuclear power technical field of waste water processing, specifically, relate to a kind of composite flocculation agent and disposal route of processing radioelement iron in nuclear power waste water, cobalt, manganese and silver, more particularly, relate to a kind of composite flocculation agent and disposal route of processing radioelement iron, cobalt, manganese and the silver ion of ultralow trace in nuclear power waste water.
Background technology
The processes such as core ore deposit exploitation refining, nuclear fuel manufacturing and nuclear fuel aftertreatment, and the isotopic large-sized analytic instrument of application of radiation, research institution and hospital all can discharge the waste water that contains radioelement.In radioactive wastewater, contained radioelement exists with metallic ion, oxide colloid form usually, biology in environment had very strong carcinogenic, teratogenesis, before being discharged into receiving water body, it must be removed from the waste water system effectively, and the mud that will contain radioelement is transferred to the safe storage place.Prior art has the main treatment process of radioelement in this type of waste water: the methods such as evaporation, ion-exchange, chemical precipitation, biological chemistry, film separation, galvanochemistry.
Yet any method for treating water all can not change the intrinsic radioactivity decay characteristic of radioelement in nuclear power waste water, therefore the nuclear power discharge of wastewater approach after usually processing is substantially: for the low radioelement of trace concentration level, enter waters (as ocean, lake, river, underground water) after it can being processed, reach harmless level by dilution and diffusion; Concentrate after the radioelement of centering high concentration level is processed carries out long-term sealing isolation, gives free rein to decay.
Wherein, evaporation method is processed the nuclear power waste water that contains radioelement can obtain very high and stable decontamination factor and enrichment factor, but needs to consume a large amount of evaporation heat energy, mainly for the treatment of the radioactive liquid waste of some height, middle concentration level.Also to consider to foam, potential danger and the Radiation Protection such as corrosion and scaling, blast.Therefore, although evaporation method has higher enrichment factor, consume energy larger, and the Radiation Protection of evaporation equipment is also very outstanding.
Ion exchange process mainly exists with ionic forms in waste water water based on radioelement, and the zwitterion by the concentrated radioelement of characteristic ion exchange resin enrichment from nuclear power waste water, wherein great majority are kation, only have minority radioelement such as iodine, phosphorus, tellurium, molybdenum, technetium, fluorine etc. usually to be anionic form, most of Zeo-karbs have higher removal ability and exchange capacity to the radioelement strontium; The phenol aldehyde type Zeo-karb can be removed radiocesium effectively, and large pores cation exchange resin can not only be removed radioactive cation, the zirconium that can also exist with colloidal form by Adsorption, niobium, cobalt and ruthenium of existing with complex form etc.The inorganic ions exchange process has high temperature resistant, radiation-resistant advantage, and the long-life fission products such as caesium, strontium is had the selectivity of height.Inorganic ion exchanger commonly used has vermiculite, zeolite (particularly clinoptilolite), eruptive tuff, manganese ore, some iron ore through heat treated, aluminum ore and synthetic zeolite, dehydrated form, basic zirconium phosphate etc.In sum; ion exchange process can effectively concentrate the radioelement ionic state that removes in waste water; also has higher removal efficient; but the radioelement of adsorption and enrichment on resin plasma exchange media; usually also need to shift by processes such as chemical removal and cleanings; operating cost is higher, and the transfer process of element between medium is comparatively complicated.
And biological chemistry generally adopts activated sludge process, produces a large amount of excess sludges, and has radioactivity; Membrane separating method faces the defectives such as film pollutes, separating effect is low; The electrochemical method energy consumption is higher, and the medicament input amount is also larger.Therefore, the methods such as biological chemistry, film separation, galvanochemistry all face certain limitation in the nuclear power wastewater treatment.
Chemical precipitation method has only needs quick separation, concentrated and solidify to the mud that produces, and general normal temperature and pressure, operation is simple, and the cheap characteristics of operating cost, thereby usually as the selection process of processing nuclear power waste water.The existing chemical precipitation technique that is applied to nuclear power waste water, chemical precipitation occurs with the radioelement of trace in nuclear power waste water such as iron, cobalt, manganese etc. and with its removal in the polymeric flocculants such as more employing molysite, aluminium salt, phosphate, permanganate, lime, soda.Use ferric ferrocyanide, copper ferrocyanide or ferrocyanide nickel to be removed by coprecipitation to several radioelement that are difficult to remove such as caesium, iodine; Radioruthenium is removed with coprecipitations such as iron protosulfide, para-periodic acid lead; Radioiodine also available sulfonation sodium and the silver nitrate reaction method that forms the silver iodide precipitation is removed.Above-mentioned chemical precipitation method be all by can with nuclear power waste water in the radioelement ion or the precipitation agent of colloid generation chemical precipitation reaction, make it to form insoluble chemical precipitates and it separated from nuclear power waste water remove.
But ion or the colloid concentration due to radioelement in nuclear power waste water is in ppb-ppt level ultratrace concentration level usually, is in the super interionic Brownian movement of weighing concentration level and causes collision and reaction probability greatly to descend, and affected the chemical precipitation effect; Secondly, the grain diameter that uses chemical precipitation agent to produce mostly is in very tiny 1～10um scope, so that is difficult to form obvious colloidal coagulation effect; And to the waste water system of multiple radioelement ion coexist, single or composite chemical precipitation agent is difficult to reach simultaneously removal effect preferably to most components.These all cause actual chemical precipitation process removal effect to be starkly lower than the design theory value.The chemical sludge amount that the conventional chemical precipitation method become is large, causes secondary pollution larger, thereby has increased mud handling capacity.And polymeric flocculant can not give effective chemical precipitation by effects such as bridge formation coagulations to complete nuclear power element ion with ionic state or complete solubilised state again.Therefore, conventional chemical precipitation method also has certain limitation in the processing of nuclear power waste water.
China Patent No. 200910062373.0, open day on Dec 28th, 2009, disclosed name is called the disposal route of nuclear waste water and the patent document of device, its method that adopts is to concentrate in rear nuclear waste water than joining for the 1%-5% super absorbent resin with chemical precipitation method with the nuclear power wastewater quality, then make the nuclear waste water gelation under stirring, the loose suede grain and the chemical floc that filter out after again nuclear power waste water gel and front is concentrated with chemical precipitation method are transferred to antiseepage in the lump, in the radiation proof cement groove, it is the cement tub cavity shape that pressurization makes gel deformation, lay one deck cement flour on its surface, pressurization again, part water is oozed out enter the cement bisque cement flour is solidified, then first be coated with one deck coating capable of waterproof, seepage control and leakproof, be coated with again one deck radiation shielding coating, add afterwards the cement lid on the cement tub top, obtain the cement seal groove, nuclear waste water is present in groove with gel form, the seabed is buried or be sunken to seal groove the most at last.Above-mentioned employing solidification method is processed nuclear waste water, exists the mud volume production to give birth to the problem large, that the subsequent treatment workload is large and processing cost is high.
China Patent No. 201010198289.4, open day on November 24th, 2010, the patent document that a name is called a kind of preprocess method of radioactive wastewater is disclosed, this patented claim is to be that 1: 2～4: 0.5～1.5 activated charcoal, zeyssatite and dry ferment potpourri are added in radioactive wastewater with mass ratio to the preprocess method of radioactive wastewater, wherein, the mass percent of potpourri and radioactive wastewater is 0.3%～1%, stir after 1～3 hour, radioactive wastewater is filtered removal through diatomite filter add potpourri.This method not only the reaction time long, power consumption is large, material deterioration inside is large, and the large shortcoming of sludge output is still overcome.
China Patent No. 92115144.6, open day on 06 15th, 1994, disclose a name and be called the efficient patent document that removes the process for purifying water of radioactivity and heavy metal, relate to the process for purifying water of removing radioactivity and heavy metal, when the isotopic ion in removal underground water, tailing water and Fe and Mn, selecting activated charcoal or activated coal is matrix, first uses 2%～10%H
2SO
4(or HCl) carries out acidification, then uses 2%～10%KMnO
4Carry out oxidation processes, in activated charcoal or activated coal surface formation manganese dioxide membrane, effectively remove radium (Ra), thorium (Th), uranium (U), iron (Fe), manganese (Mn), the activated charcoal that this patent is used or activated coal reach full close inefficacy after, need constantly to regenerate with hydrochloric acid etc. and process or directly dispose as radioactive waste, secondary pollution is larger.
China Patent No. 200410042589.8, open day on Dec 07th, 2005, disclose the patent document of a disposal system that is called the radioactive wastewater disposal route and uses, Spent Radioactive method for treating water and the disposal system of using thereof comprise that the pre-service, the film that carry out successively separate and three steps of aftertreatment.Wherein pre-service can be removed suspended particle and the impurity in water; The low molecule radiomaterial of part in adsorbable water; Remove colloid and all kinds of large molecule in water.But the NF membrane element that this patent only relies on film to separate is removed the larger solute particles of diameter only, and the negative and positive exchange of particles resin of Adsorption of Radioactive element and membrane module will become radioactive waste jointly, and operating cost and secondary pollution are larger.
Summary of the invention
The problem that 1, will solve
in order to overcome the deficiencies in the prior art, especially the radioelement iron that is in ppb-ppt level ultratrace concentration level for ion or the colloid concentration of radioelement in nuclear power waste water, cobalt, manganese and silver do not have the problem of good cleaning way, the invention provides radioelement iron in a kind of processing nuclear power waste water, cobalt, composite flocculation agent and the disposal route of manganese and silver, it is a kind of composite flocculation agent that can efficiently separate the multiple nucleic that coexists, realization is in the radioelement iron of ppb-ppt level ultratrace to concentration level in nuclear power waste water, cobalt, manganese and silver are realized effectively removing.
2, technical scheme
In order to address the above problem, the technical solution adopted in the present invention is as follows:
A kind of composite flocculation agent of processing radioelement iron in nuclear power waste water, cobalt, manganese and silver, be comprised of chemical precipitation agent and organic polymer coargulator, described chemical precipitation agent is a kind of or wherein several combination arbitrarily in potassium permanganate, sodium sulphide, sodium carbonate and NaOH; Described organic polymer coargulator is polyacrylamide (PAM) and/or sodium polyacrylate and/or dimethyl diallyl ammonium chloride (DADMAC); The weight ratio of described chemical precipitation agent and organic polymer coargulator is 1～10:1.
A kind of method of processing radioelement iron in nuclear power waste water, cobalt, manganese and silver the steps include:
A) adopt chemical precipitation agent and organic polymer coargulator configuration composite flocculation agent, described chemical precipitation agent is a kind of or wherein several combination arbitrarily in potassium permanganate, sodium sulphide, sodium carbonate and NaOH; Described organic polymer coargulator is polyacrylamide (PAM) and/or sodium polyacrylate and/or dimethyl diallyl ammonium chloride (DADMAC); The weight ratio of described chemical precipitation agent and organic polymer coargulator is 1～10:1;
B) add steps A in the waste water that contains radioelement iron, cobalt, manganese and silver) in composite flocculation agent, dosage is that the concentration level that organic polymer coargulator adds in the waste water system is 2～10ppm; Too low dosage can not play due flocculating effect, and too high dosage also will cause higher flocculating agent consumption simultaneously to the not significantly help of lifting of clearance;
C) pH of regulator solution, making pH is 8.5～11; Lower pH easily decomposes flocculating agent, and too high pH will cause higher alkali lye consumption, has increased simultaneously the difficulty of water outlet pH regulation and control; Solution temperature is controlled at 10～40 ℃; Too low temperature will be unfavorable for the formation of floc unit;
D) stir and flocculate, speed of agitator is 100～400r/min;
E) filter.
Preferably, the mixing time described step D) is 10～60s.
Preferably, filtration described step e) is that the nuclear power waste water after adopting miillpore filter or activated-charcoal column to flocculation filters.
The bore dia of the miillpore filter that the filtration preferably, described step e) is adopted is 0.45um～3um.
Preferably, in the described waste water that contains radioelement iron, cobalt, manganese and silver, the concentration of radioelement iron, cobalt, manganese and silver is in the ultralow trace level of ppb-ppt level, is many kinds of metal ions or the colloid system status that coexists.
3, beneficial effect
Than prior art, beneficial effect of the present invention is:
(1) the present invention is comprised of chemical precipitation agent and organic polymer coargulator, can react with radioelement iron, cobalt, manganese and the silver ion that ion concentration is in the ultratrace concentration level of ppb-ppt level, metallic ion in chemical precipitation agent and waste water is combined into insoluble particle or precipitation, flocculating agent plays flocculation, form colloid or flocculation sediment with the precipitation that has formed, accelerate the detachment process of solid-liquid two-phase, finally realize metallic ion removing fast and effectively from water body, ion remaval effective;
(2) chemical precipitation agent of the present invention is a kind of in potassium permanganate, sodium sulphide, sodium carbonate, NaOH or wherein several arbitrarily, organic polymer coargulator is ammonium polyacrylate (PAM) and/or sodium polyacrylate and/or dimethyl diallyl ammonium chloride (DADMAC), raw material sources are cheap, and processing cost is low;
(3) weight ratio of chemical precipitation agent of the present invention and organic polymer coargulator is 1～10:1, the composite flocculation agent that chemical precipitation agent and organic polymer coargulator form can be realized 99% removal effect to main target radioelement iron, cobalt, manganese and silver-colored maximum in nuclear power waste water; Solution after the solidifying wadding of the present invention uses bore dia as the filter medium between 0.45um～3um, the nuclear power waste water after flocculating to be filtered, the particle that produces in the chemical flocculation process is in the fine particle in the scope of 1～10um, can carry out effectively catching, processing cost is low, effective;
(4) chemical precipitation agent that adopts of the present invention and organic polymer coargulator combination and miillpore filter or activated-charcoal column be to the technical scheme that the nuclear power waste water after flocculating filters, have advantages of course of reaction rapidly and efficiently, single step adds and it is few to produce the hazardous chemical sludge quantity;
(5) the present invention processes in the method for radioelement iron in nuclear power waste water, cobalt, manganese and silver, and by controlling rational pH value and temperature of reaction, treatment effect is good.
Embodiment
Describe the present invention below in conjunction with specific embodiment.
Embodiment 1
Process the method for radioelement iron in nuclear power waste water, cobalt, manganese and silver, in pending waste water, the content of main nucleic is as shown in table 1.
Main nucleic mean concentration level in certain nuclear power waste water of table 1
| Main nucleic | Concentration (ppt of unit) |
| Silver | 7.74×10 -5 |
| Cobalt | 4.78×10 -4 |
| Iron | 3.95×10 -4 |
| Manganese | 1.52×10 -4 |
| Tellurium | 1.13×10 -4 |
| Iodine | 8.54×10 -4 |
Its treatment step is:
A) adopt chemical precipitation agent and organic polymer coargulator configuration composite flocculation agent, chemical precipitation agent is a kind of or wherein several combination arbitrarily in potassium permanganate, sodium sulphide, sodium carbonate and NaOH; Organic polymer coargulator is polyacrylamide (PAM) and/or sodium polyacrylate and/or dimethyl diallyl ammonium chloride (DADMAC); The weight ratio of chemical precipitation agent and organic polymer coargulator is 1～10:1; The combination of above-mentioned chemical precipitation agent and organic polymer coargulator can, in this enforcement, the selection of chemical precipitation agent and organic polymer coargulator is as shown in table 2.
B) add steps A in the waste water that contains radioelement iron, cobalt, manganese and silver) in composite flocculation agent, dosage is that the concentration level that organic polymer coargulator adds in the waste water system is 2～10ppm; Too low dosage can not play due flocculating effect, and too high dosage also will cause higher flocculating agent consumption simultaneously to the not significantly help of lifting of clearance.
C) pH of regulator solution, making pH is 8.5～11; Lower pH easily decomposes flocculating agent, and too high pH will cause higher alkali lye consumption, has increased simultaneously the difficulty of water outlet pH regulation and control; The temperature of regulator solution makes solution temperature be controlled at 10～40 ℃, and too low temperature will be unfavorable for the formation of floc unit.
D) stir and flocculate; Mixing time is 10～60s, and speed of agitator is 100～400r/min.The present embodiment is electric mixer preferably, and scheme one and two stirring rate are 400r/min, and scheme three and four stirring rate are 250r/min, and scheme five and six stirring rate are 100r/min.
E) filter, filtration is that the nuclear power waste water after adopting miillpore filter or activated-charcoal column to flocculation filters.
Be divided into six embodiments and implement, the data of each embodiment are as shown in table 2.
One-tenth in each embodiment of table 2 is grouped into and experiment parameter
In above embodiment, organic polymer coargulator can play to the tiny colloidal solid after flocculation the effect of bridge formation, capture and coagulation.Metallic ion in the main and waste water of chemical precipitation agent is combined into insoluble particle or precipitation; organic polymer coargulator plays flocculation; main precipitation with having formed forms colloid or flocculation sediment; accelerate the detachment process of solid-liquid two-phase, finally realize metallic ion removing fast and effectively from water body.The composite flocculation agent that chemical precipitation agent and organic polymer coargulator form, can realize good removal effect to the main target radioelement iron in nuclear power waste water, cobalt, manganese and silver, simultaneously by the absorption coagulation effect of flocculated colloid, also can realize removal effect more than 20% for other granule ion.In above embodiment, the clearance of one to six pair of ferric ion of embodiment is respectively 98%, 97%, 99%, 97%, 98% and 99%; The clearance of one to six pair of cobalt ions of embodiment is respectively 99%, 98%, 99%, 98%, 97% and 98%; The clearance of one to six pair of manganese ion of embodiment is respectively 99%, 99%, 99%, 99%, 98% and 99%; The clearance of one to six pair of silver ion of embodiment is respectively 97%, 96%, 94%, 98%, 93% and 96%.
Embodiment 2
Different precipitation agents can produce different effects.The present invention is as shown in table 3 to the removal effect of ferric ion.The precipitation agent that the present invention is different is as shown in table 4 to the removal effect of manganese ion.The precipitation agent that the present invention is different is as shown in table 5 to the removal effect of silver ion.The precipitation agent that the present invention is different is as shown in table 6 to the removal effect of cobalt ions.
The removal effect of table 3 the present invention to ferric ion
The removal effect of table 4 the present invention to manganese ion
The removal effect of table 5 the present invention to silver ion
The removal effect of table 6 the present invention to cobalt ions
Embodiment 3
During the actual use of the present invention, the combination of different precipitation agent can produce different effects, and effect corresponding to its parameter is as shown in Fig. 7,8,9,10 and 11.
The removal effect of table 7 the present invention to ferric ion
The removal effect of table 8 the present invention to manganese ion
The removal effect of table 9 the present invention to silver ion
The removal effect of table 10 the present invention to cobalt ions
Claims (6)
1. process radioelement iron in nuclear power waste water, cobalt, manganese and silver-colored composite flocculation agent for one kind, it is characterized in that: be comprised of chemical precipitation agent and organic polymer coargulator, described chemical precipitation agent is a kind of or wherein several combination arbitrarily in potassium permanganate, sodium sulphide, sodium carbonate and NaOH; Described organic polymer coargulator is polyacrylamide and/or sodium polyacrylate and/or dimethyl diallyl ammonium chloride; The weight ratio of described chemical precipitation agent and organic polymer coargulator is 1～10:1.
2. a method of processing radioelement iron in nuclear power waste water, cobalt, manganese and silver, the steps include:
A) adopt chemical precipitation agent and organic polymer coargulator configuration composite flocculation agent, described chemical precipitation agent is a kind of or wherein several combination arbitrarily in potassium permanganate, sodium sulphide, sodium carbonate and NaOH; Described organic polymer coargulator is polyacrylamide and/or sodium polyacrylate and/or dimethyl diallyl ammonium chloride; The weight ratio of described chemical precipitation agent and organic polymer coargulator is 1～10:1;
B) add steps A in the waste water that contains radioelement iron, cobalt, manganese and silver) in composite flocculation agent, dosage is that the concentration level that organic polymer coargulator adds in the waste water system is 2～10 ppm;
C) pH of regulator solution, making pH is 8.5 ~ 11; Solution temperature is controlled at 10～40 ℃;
D) stir and flocculate, speed of agitator is 100～400r/min;
E) filter.
3. a kind of method of processing radioelement iron in nuclear power waste water, cobalt, manganese and silver according to claim 2, is characterized in that described step D) in mixing time be 10 ~ 60s.
4. a kind of method of processing radioelement iron in nuclear power waste water, cobalt, manganese and silver according to claim 2, is characterized in that described step e) filtration be that nuclear power waste water after adopting miillpore filter or activated-charcoal column to flocculation filters.
5. a kind of method of processing radioelement iron in nuclear power waste water, cobalt, manganese and silver according to claim 4, is characterized in that described step e) in the bore dia of the miillpore filter that adopts of filtration be 0.45um ~ 3um.
6. a kind of described according to claim 2-5 any one processes the method for radioelement iron in nuclear power waste water, cobalt, manganese and silver, it is characterized in that: in the described waste water that contains radioelement iron, cobalt, manganese and silver, the concentration of radioelement iron, cobalt, manganese and silver is in the ultralow trace level of ppb-ppt level, is many kinds of metal ions or the colloid system status that coexists.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101056175A CN103151088A (en) | 2013-03-28 | 2013-03-28 | Composite flocculating agent for processing radioactive elements iron, cobalt, manganese and silver in nuclear waste water and processing method |
| PCT/CN2013/087185 WO2014153965A1 (en) | 2013-03-28 | 2013-11-15 | Composite flocculating agent and method for processing radioactive elements iron, cobalt, manganese and silver in nuclear wastewater |
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| CN2013101056175A CN103151088A (en) | 2013-03-28 | 2013-03-28 | Composite flocculating agent for processing radioactive elements iron, cobalt, manganese and silver in nuclear waste water and processing method |
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