CN108658320A - A method of chemically recycling heavy metal nickel in nickel-plating waste water - Google Patents
A method of chemically recycling heavy metal nickel in nickel-plating waste water Download PDFInfo
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Abstract
The invention discloses a kind of method for recycling heavy metal nickel in chemically nickel-plating waste water, includes the heavy metal nickel cleaned by ion exchange resin adsorption and enrichment chemical nickel plating in waste water, obtain the waste water containing time phosphorus；Zeolite regeneration is carried out to the ion exchange resin, obtains the regenerated liquid containing nickel ion；Electrochemical catalytic oxidation is carried out to the waste water containing secondary phosphorus, electroreduction is carried out to the regenerated liquid containing nickel ion, to recycle metallic nickel.The present invention realizes the oxidation of time phosphorus recycling synchronous with high concentration of nickel ion using electrochemical catalytic oxidation technology, can the secondary phosphorus oxygen in waste water effectively be turned to positive phosphorus, the recycling of phosphorus is realized by the way that precipitating reagent is added；Heavy metal nickel can be recycled with electroreduction simultaneously during aoxidizing secondary phosphorus, have the advantages that simple, efficient, economy and be easy to apply in engineering.
Description
Technical field
The present invention relates to water-treatment technology field, the side that heavy metal nickel is recycled in a kind of chemically nickel-plating waste water is particularly related to
Method.
Background technology
Chemical nickel plating is to reduce nickel ions to metallic nickel using reducing agent (hypophosphites), and deposit on plating piece surface
Process.In recent years, chemical plating nickel technology is in the industrial departments extensive use such as chemical industry, military affairs, electronics, aerospace, automobile.
Chemical plating nickel technology is ripe day by day, and application is more and more extensive, and production scale is growing, and resulting environmental problem is also more next
It is more serious.
Chemical nickle-plating wastewater is mainly derived from generated cleaning waste water when cleaning parts, therefore is referred to as chemistry
Waste water is cleaned in nickel plating, wherein containing nickel ion and a large amount of hypophosphites, phosphite pollutant.Nickel ion has strong carcinogenic work
With, it is concentrated in the soil influence crop growth, influences fish production in water, it is final by the conversion of a series of environmental transport and transfer
Into food chain, serious threat is produced to human health.And hypophosphites and phosphite its solubility it is big and it is difficult with it is heavy
Shallow lake agent reacts to form precipitation, leads to the loss that phosphor resource has been also resulted in while body eutrophication is serious.Therefore chemical nickel plating
The cleaning wastewater treatment and recycling phosphorus and heavy metal nickel of generation become one of current research hot spot.
Nickel-containing waste water processing method mainly has absorption method, emulsion liquid membrane extraction, chemical precipitation method, ion-exchange and electricity at present
Solution.In addition to electrolysis, other methods only change nickel ion existing forms, and nickel ion is made to migrate, but pollution is not
There is thorough elimination, does not more obtain economic benefit.The removal of hypophosphorous acid root and orthophosphite first has to be oxidized to positive phosphorus, adds
Positive phosphorus is thoroughly precipitated removal, but its stable structure by precipitating reagent, it is difficult to common oxidizing process by its exhaustive oxidation.When using single
The electrochemical techniques of room cannot handle time phosphorus waste water and nickel-containing waste water simultaneously, and when being electrolysed to nickel-containing waste water, easily produce
The hydroxy nickel oxide of raw black, can not recycle metallic nickel, reaction efficiency is low.
Invention content
In view of this, a kind of method it is an object of the invention to propose to recycle heavy metal nickel in chemically nickel-plating waste water,
The technical issues of must not handling time phosphorus waste water and nickel-containing waste water simultaneously with solution, and recycling phosphorus and metallic nickel.
Based on above-mentioned purpose, the present invention provides a kind of methods that heavy metal nickel is recycled in chemically nickel-plating waste water, including：
The heavy metal nickel in waste water is cleaned by ion exchange resin adsorption and enrichment chemical nickel plating, is obtained containing the useless of time phosphorus
Water；
Zeolite regeneration is carried out to the ion exchange resin, obtains the regenerated liquid containing nickel ion；
Electrochemical catalytic oxidation is carried out to the waste water containing secondary phosphorus, electricity is carried out to the regenerated liquid containing nickel ion
Reduction, to recycle metallic nickel.
In some embodiments of the invention, the ion exchange resin is cation exchange resin.
In some embodiments of the invention, the ion exchange resin is eluted using concentrated hydrochloric acid or the concentrated sulfuric acid
Regeneration.
In some embodiments of the invention, to described, the waste water containing secondary phosphorus carries out electrochemical catalytic oxidation, to described
Regenerated liquid containing nickel ion carries out electroreduction, including：
The waste water containing time phosphorus is added into the anode chamber of dual chamber electrochemical reactor, to the dual chamber electrochemical reactor
Cathode chamber in be added the regenerated liquid containing nickel ion；
By the secondary phosphorus in electrochemical catalytic oxidation degrading waste water, pass through the nickel in electrochemical reduction regenerated liquid.
In some embodiments of the invention, using proton exchange membrane as the diaphragm between anode chamber and cathode chamber.
In some embodiments of the invention, to described, the waste water containing secondary phosphorus carries out electrochemical catalytic oxidation, to described
Regenerated liquid containing nickel ion carries out electroreduction, including：
The waste water containing time phosphorus is added into the anode chamber of three Room electrochemical reactors, to three Room electrochemical reactor
Cathode chamber in be added the regenerated liquid containing nickel ion, hydrochloric acid solution is added into the middle compartment of three Room electrochemical reactor
Or sulfuric acid solution；
By the secondary phosphorus in electrochemical catalytic oxidation degrading waste water, pass through the nickel in electrochemical reduction regenerated liquid.
In some embodiments of the invention, using cation-exchange membrane as the diaphragm between anode chamber and middle compartment, with
Anion-exchange membrane is as the diaphragm between cathode chamber and middle compartment.
In some embodiments of the invention, the anode is selected from titanium ruthenium net, diamond film electrode, ruthenium iridium electrode, institute
It states cathode and is selected from stainless steel or titanium sheet.
In some embodiments of the invention, the method further includes：
After time phosphorus oxygen is melted into positive phosphorus, precipitating reagent is added into the waste water containing positive phosphorus, so that positive phosphorus precipitates in waste water,
To recycle the phosphorus in waste water.
In some embodiments of the invention, the precipitating reagent in calcium salt, aluminium salt, magnesium salts and molysite at least one
Kind
It can be seen that the method for recycling heavy metal nickel in chemically nickel-plating waste water provided in an embodiment of the present invention utilizes electrification
It learns catalytic oxidation technologies and realizes the oxidation of time phosphorus recycling synchronous with high concentration of nickel ion, it can be effectively by the secondary phosphorus oxygen in waste water
Positive phosphorus is turned to, the recycling of phosphorus is realized by the way that precipitating reagent is added；Heavy metal can be recycled during oxidation time phosphorus with electroreduction simultaneously
Nickel has the advantages that simple, efficient, economical and is easy to apply in engineering.
Description of the drawings
Fig. 1 is the structural schematic diagram of the dual chamber electrochemical reactor of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of three Room electrochemical reactors of one embodiment of the invention；
Fig. 3 is the structural schematic diagram of three Room electrochemical reactors of another embodiment of the present invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this hair
Bright further description.
Method provided in an embodiment of the present invention is cleaned by ion exchange resin adsorption and enrichment chemical nickel plating in waste water first
Heavy metal nickel, obtain the waste water containing time phosphorus；Then to the ion exchange resin carry out zeolite regeneration, obtain containing nickel from
The regenerated liquid of son；Finally to described, the waste water containing secondary phosphorus carries out electrochemical catalytic oxidation, to the regeneration containing nickel ion
Liquid carries out electroreduction, to recycle metallic nickel.This method realizes the oxidation of time phosphorus and highly concentrated using electrochemical catalytic oxidation technology
The synchronous recycling for spending nickel ion can effectively remove the secondary phosphorus in waste water, while can recycle heavy metal nickel with electroreduction, have letter
It is single, efficiently, it is economical and the advantages of be easy to apply in engineering.
Embodiment 1
1) chemical nickel plating containing time phosphorus and heavy metal nickel is taken to clean waste water, it is enriched by cationic exchange resin adsorption
The heavy metal nickel in nickel plating cleaning waste water is learned, the waste water containing time phosphorus is obtained；
2) use concentrated hydrochloric acid solution to carry out zeolite regeneration to the cation exchange resin, obtain containing nickel ion and chlorine from
The regenerated liquid of son；
3) as shown in Figure 1, it is the structural schematic diagram of the dual chamber electrochemical reactor of the embodiment of the present invention.To dual chamber electrification
It learns and the waste water containing time phosphorus is added in the anode chamber of reactor, be added and contain into the cathode chamber of the dual chamber electrochemical reactor
The regenerated liquid of nickel ion and chlorion；And have the titanium ruthenium net of electrochemical catalysis performance as anode using efficient stable, with titanium sheet
As cathode, using proton exchange membrane (PEM) as the diaphragm between anode chamber and cathode chamber；
4) DC power supply is powered, and is connected anode and cathode with conducting wire, and it is 3.0V to adjust additional slot pressure, and the electrochemical treatments time is
For 24 hours, to by the secondary phosphorus in electrochemical catalytic oxidation degrading waste water, pass through the nickel in electrochemical reduction regenerated liquid；
5) after the secondary phosphorus oxygen in anode chamber is melted into positive phosphorus, aluminium salt (such as aluminium chloride) is added into the waste water of anode chamber,
So that positive phosphorus precipitates in waste water, sediment is collected, to recycle phosphorus.
The secondary phosphorus oxygen of anode chamber is melted into phosphorous and is finally oxidized to just by the active oxygen radical generated during electro-catalysis
Phosphorus, while nickel ion can obtain electronic deposition into metallic nickel in cathode in oxidation process.
In reaction, sampled every 1h, take 100 μ L every time, then water sample is pre-processed accordingly, the secondary phosphorus in anode chamber with
And intermediate product phosphorous carries out content analysis with ion chromatography, the positive phosphorus content of generation uses ammonium molybdate spectrophotometric method and total phosphorus
Content uses potassium persulfate oxidation-ammonium molybdate spectrophotometric method, cathode chamber that will carry out ICP-OES after water sample dilute filtration and test nickel
Ion concentration.For 24 hours, the degradation rate of anode chamber time phosphorus is 100% for reaction, and the production rate of positive phosphorus is 100%, intermediate product phosphorous
Content, which first gradually rises, to be reduced afterwards to zero, and secondary phosphorus all generates positive phosphorus by oxidation；The content of cathode chamber nickel ion is finally
20.08%, remaining nickel is deposited on cathode surface in the form of metal simple-substance.
In this embodiment, reaction system is dual chamber, not only by the secondary phosphorus ligands of anode chamber, while the nickel in oxidation process
Ion can obtain electronic deposition into metallic nickel in cathode, it is suppressed that chlorion enters anode chamber, eliminates the pollution of anode producing chlorine and asks
Topic；The positive phosphorus that time phosphorus oxidation generates simultaneously, which is added precipitating reagent and generates phosphorus precipitation, is able to recycling phosphorus, realize waste water removal and phosphorus,
The recycling of nickel.
Embodiment 2
1) chemical nickel plating containing time phosphorus and heavy metal nickel is taken to clean waste water, it is enriched by cationic exchange resin adsorption
The heavy metal nickel in nickel plating cleaning waste water is learned, the waste water containing time phosphorus is obtained；
2) use concentrated hydrochloric acid solution to carry out zeolite regeneration to the cation exchange resin, obtain containing nickel ion and chlorine from
The regenerated liquid of son；
3) as shown in Fig. 2, it is the structural schematic diagram of three Room electrochemical reactors of the embodiment of the present invention.To three Room electrification
It learns and the waste water containing time phosphorus is added in the anode chamber of reactor, be added and contain into the cathode chamber of three Room electrochemical reactor
0.1mol/L hydrochloric acid solutions are added into the middle compartment of three Room electrochemical reactor for the regenerated liquid of nickel ion and chlorion；
And have the diamond film electrode of electrochemical catalysis performance as anode using efficient stable, using stainless steel as cathode, with sun
Amberplex (CEM) is as the diaphragm between anode chamber and middle compartment, using anion-exchange membrane (AEM) as cathode chamber in
Diaphragm between compartment；
4) DC power supply is powered, and is connected anode and cathode with conducting wire, and it is 3.5V to adjust additional slot pressure, and the electrochemical treatments time is
20h, to by the secondary phosphorus in electrochemical catalytic oxidation degrading waste water, pass through the nickel in electrochemical reduction regenerated liquid.
In reaction, sampled every 1h, take 100 μ L every time, then water sample is pre-processed accordingly, the secondary phosphorus in anode chamber with
And intermediate product phosphorous carries out content analysis with ion chromatography, the positive phosphorus content of generation uses ammonium molybdate spectrophotometric method and total phosphorus
Content uses potassium persulfate oxidation-ammonium molybdate spectrophotometric method, cathode chamber that will carry out ICP-OES after water sample dilute filtration and test nickel
Ion concentration.20h is reacted, the degradation rate of anode chamber time phosphorus is 100%, and the production rate of positive phosphorus is 100%, intermediate product phosphorous
Content, which first gradually rises, to be reduced afterwards to zero, and secondary phosphorus all generates positive phosphorus by oxidation；The content of cathode chamber nickel ion is finally
17.83%, remaining nickel is deposited on cathode surface in the form of metal simple-substance, and the concentration of middle compartment hydrochloric acid is up to 0.90mol/L.
In this embodiment, reaction system is three Room, not only by the secondary phosphorus ligands of anode chamber, while the nickel in oxidation process
Ion can obtain electronic deposition into metallic nickel in cathode, it is suppressed that chlorion enters anode chamber, eliminates the pollution of anode producing chlorine and asks
Topic, while carrying out enrichment using chlorion in the hydrogen ion and waste water of oxidation time phosphorus generation and being converted into hydrochloric acid, realize waste water
The recycling of removal and multiple resources.
Embodiment 3
1) chemical nickel plating containing time phosphorus and heavy metal nickel is taken to clean waste water, it is enriched by cationic exchange resin adsorption
The heavy metal nickel in nickel plating cleaning waste water is learned, the waste water containing time phosphorus is obtained；
2) it uses concentrated sulfuric acid solution to carry out zeolite regeneration to the cation exchange resin, obtains containing nickel ion and sulfuric acid
The regenerated liquid of radical ion；
3) as shown in figure 3, it is the structural schematic diagram of three Room electrochemical reactors of the embodiment of the present invention.To three Room electrification
It learns and the waste water containing time phosphorus is added in the anode chamber of reactor, be added and contain into the cathode chamber of three Room electrochemical reactor
0.02mol/L sulfuric acid is added into the middle compartment of three Room electrochemical reactor for the regenerated liquid of nickel ion and sulfate ion
Solution；And using efficient stable have electrochemical catalysis performance ruthenium iridium electrode as anode, using stainless steel as cathode, with sun from
Proton exchange (CEM) is as the diaphragm between anode chamber and middle compartment, using anion-exchange membrane (AEM) as cathode chamber and interval
Diaphragm between room；
4) DC power supply is powered, and is connected anode and cathode with conducting wire, and it is 3.8V to adjust additional slot pressure, and the electrochemical treatments time is
18h, to by the secondary phosphorus in electrochemical catalytic oxidation degrading waste water, pass through the nickel in electrochemical reduction regenerated liquid；
5) after the secondary phosphorus oxygen in anode chamber is melted into positive phosphorus, calcium salt (such as calcium chloride) is added into the waste water of anode chamber,
So that positive phosphorus precipitates in waste water, sediment is collected, to recycle phosphorus.
In reaction, sampled every 1h, take 100 μ L every time, then water sample is pre-processed accordingly, the secondary phosphorus in anode chamber with
And intermediate product phosphorous carries out content analysis with ion chromatography, the positive phosphorus content of generation uses ammonium molybdate spectrophotometric method and total phosphorus
Content uses potassium persulfate oxidation-ammonium molybdate spectrophotometric method, cathode chamber that will carry out ICP-OES after water sample dilute filtration and test nickel
Ion concentration.18h is reacted, the degradation rate of anode chamber time phosphorus is 100%, and the production rate of positive phosphorus is 100%, intermediate product phosphorous
Content, which first gradually rises, to be reduced afterwards to zero, and secondary phosphorus all generates positive phosphorus by oxidation；The content of cathode chamber nickel ion is finally
18.54%, remaining nickel is deposited on cathode surface in the form of metal simple-substance, and the concentration of middle compartment sulfuric acid is up to 0.60mol/L.
In this embodiment, reaction system is three Room, not only by the secondary phosphorus ligands of anode chamber, while the nickel in oxidation process
Ion can obtain electronic deposition into metallic nickel in cathode, at the same the hydrogen ion that is generated using oxidation time phosphorus and sulfate radical in waste water from
Son carries out enrichment and is converted into sulfuric acid, realizes the removal of waste water and the recycling of multiple resources.Also, the positive phosphorus that secondary phosphorus oxidation generates
Precipitating reagent generation phosphorus precipitation is added and is able to recycling phosphorus, realizes the removal of waste water and the recycling of multiple resources
Embodiment 4
1) chemical nickel plating containing time phosphorus and heavy metal nickel is taken to clean waste water, it is enriched by cationic exchange resin adsorption
The heavy metal nickel in nickel plating cleaning waste water is learned, the waste water containing time phosphorus is obtained；
2) use concentrated hydrochloric acid solution to carry out zeolite regeneration to the cation exchange resin, obtain containing nickel ion and chlorine from
The regenerated liquid of son；
3) as shown in Fig. 2, it is the structural schematic diagram of three Room electrochemical reactors of the embodiment of the present invention.To three Room electrification
It learns and the waste water containing time phosphorus is added in the anode chamber of reactor, be added and contain into the cathode chamber of three Room electrochemical reactor
0.1mol/L hydrochloric acid solutions are added into the middle compartment of three Room electrochemical reactor for the regenerated liquid of nickel ion and chlorion；
And have the diamond film electrode of electrochemical catalysis performance as anode using efficient stable, using stainless steel as cathode, with sun
Amberplex (CEM) is as the diaphragm between anode chamber and middle compartment, using anion-exchange membrane (AEM) as cathode chamber in
Diaphragm between compartment；
4) DC power supply is powered, and is connected anode and cathode with conducting wire, and it is 3.5V to adjust additional slot pressure, and the electrochemical treatments time is
20h, to by the secondary phosphorus in electrochemical catalytic oxidation degrading waste water, pass through the nickel in electrochemical reduction regenerated liquid；
5) after the secondary phosphorus oxygen in anode chamber is melted into positive phosphorus, molysite (such as iron chloride) is added into the waste water of anode chamber,
So that positive phosphorus precipitates in waste water, sediment is collected, to recycle phosphorus.
In reaction, sampled every 1h, take 100 μ L every time, then water sample is pre-processed accordingly, the secondary phosphorus in anode chamber with
And intermediate product phosphorous carries out content analysis with ion chromatography, the positive phosphorus content of generation uses ammonium molybdate spectrophotometric method and total phosphorus
Content uses potassium persulfate oxidation-ammonium molybdate spectrophotometric method, cathode chamber that will carry out ICP-OES after water sample dilute filtration and test nickel
Ion concentration.20h is reacted, the degradation rate of anode chamber time phosphorus is 100%, and the production rate of positive phosphorus is 100%, intermediate product phosphorous
Content, which first gradually rises, to be reduced afterwards to zero, and secondary phosphorus all generates positive phosphorus by oxidation；The content of cathode chamber nickel ion is finally
17.98%, remaining nickel is deposited on cathode surface in the form of metal simple-substance, and the concentration of middle compartment hydrochloric acid is up to 0.90mol/L.
In this embodiment, reaction system is three Room, not only by the secondary phosphorus ligands of anode chamber, while the nickel in oxidation process
Ion can obtain electronic deposition into metallic nickel in cathode, it is suppressed that chlorion enters anode chamber, eliminates the pollution of anode producing chlorine and asks
Topic, while carrying out enrichment using chlorion in the hydrogen ion and waste water of oxidation time phosphorus generation and being converted into hydrochloric acid, realize waste water
The recycling of removal and multiple resources.Also, the positive phosphorus that secondary phosphorus oxidation generates is added precipitating reagent generation phosphorus precipitation and is able to recycling phosphorus, real
The removal of waste water and the recycling of multiple resources are showed.
It can be seen that the invention has the advantages that：
1, being effectively treated for time phosphorus may be implemented in the method for the present invention, and can recycle heavy metal nickel simultaneously；
2, the waste water containing secondary phosphorus is entered anode chamber by the method for the present invention, carries out electrochemical catalytic oxidation, while will contain
The resin zeolite regeneration liquid (hydrochloric acid elution resin is added and generate regenerated liquid) of high concentration of nickel ion and chlorion enters cathode
Room carries out electroreduction and recycles heavy metal nickel, and the present invention solves in the reaction system of single chamber, cannot handle simultaneously time phosphorus waste water and
Chlorine nickel waste water, and when being electrolysed to chlorine nickel waste water, generate the hydroxy nickel oxide of chlorine pollution and black, gold can not be recycled
Belong to nickel, the low problem of reaction efficiency；
3, used by the method for the present invention when dual chamber system, can in anode chamber and cathode chamber Simultaneous Oxidation removal time phosphorus and
Recycle metallic nickel；When using three chamber body systems, not only in anode chamber and cathode chamber Simultaneous Oxidation removal time phosphorus and recycling metallic nickel, and
And it can also be enriched with hydrochloric acid or sulfuric acid in middle compartment.Two kinds of reaction systems are useless in processing high-concentration hardly-degradable chemical nickel plating cleaning
Higher economic benefit is realized while water；
4, positive phosphorus is thoroughly precipitated by removal by precipitating reagent, to recycle phosphorus.
Those of ordinary skills in the art should understand that：The discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under the thinking of the present invention, above example
Or can also be combined between the technical characteristic in different embodiments, and there are different aspects present invention as described above
Many other variations, in order to it is concise they do not provided in details.Therefore, all within the spirits and principles of the present invention,
Any omission, modification, equivalent replacement, improvement for being made etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of method for recycling heavy metal nickel in chemically nickel-plating waste water, which is characterized in that including：
The heavy metal nickel in waste water is cleaned by ion exchange resin adsorption and enrichment chemical nickel plating, obtains the waste water containing time phosphorus；
Zeolite regeneration is carried out to the ion exchange resin, obtains the regenerated liquid containing nickel ion；
Electrochemical catalytic oxidation is carried out to the waste water containing secondary phosphorus, electricity is carried out also to the regenerated liquid containing nickel ion
Original, to recycle metallic nickel.
2. in chemically nickel-plating waste water according to claim 1 recycle heavy metal nickel method, which is characterized in that it is described from
Sub-exchange resin is cation exchange resin.
3. the method for recycling heavy metal nickel in chemically nickel-plating waste water according to claim 1, which is characterized in that using dense
Hydrochloric acid or the concentrated sulfuric acid carry out zeolite regeneration to the ion exchange resin.
4. the method for recycling heavy metal nickel in chemically nickel-plating waste water according to claim 1, which is characterized in that described
Waste water containing secondary phosphorus carries out electrochemical catalytic oxidation, and electroreduction is carried out to the regenerated liquid containing nickel ion, including：
The waste water containing time phosphorus is added into the anode chamber of dual chamber electrochemical reactor, to the moon of the dual chamber electrochemical reactor
The regenerated liquid containing nickel ion is added in pole room；
By the secondary phosphorus in electrochemical catalytic oxidation degrading waste water, pass through the nickel in electrochemical reduction regenerated liquid.
5. the method for recycling heavy metal nickel in chemically nickel-plating waste water according to claim 4, which is characterized in that with proton
Exchange membrane is as the diaphragm between anode chamber and cathode chamber.
6. the method for recycling heavy metal nickel in chemically nickel-plating waste water according to claim 1, which is characterized in that described
Waste water containing secondary phosphorus carries out electrochemical catalytic oxidation, and electroreduction is carried out to the regenerated liquid containing nickel ion, including：
The waste water containing time phosphorus is added into the anode chamber of three Room electrochemical reactors, to the moon of three Room electrochemical reactor
In pole room be added the regenerated liquid containing nickel ion, into the middle compartment of three Room electrochemical reactor be added hydrochloric acid solution or
Sulfuric acid solution；
By the secondary phosphorus in electrochemical catalytic oxidation degrading waste water, pass through the nickel in electrochemical reduction regenerated liquid.
7. in chemically nickel-plating waste water according to claim 6 recycle heavy metal nickel method, which is characterized in that with sun from
Proton exchange as the diaphragm between anode chamber and middle compartment, using anion-exchange membrane as between cathode chamber and middle compartment every
Film.
8. the method for recycling heavy metal nickel in the chemically nickel-plating waste water according to claim 4 or 6, which is characterized in that institute
It states anode and is selected from titanium ruthenium net, diamond film electrode, ruthenium iridium electrode, the cathode is selected from stainless steel or titanium sheet.
9. the method for recycling heavy metal nickel in chemically nickel-plating waste water according to claim 1, which is characterized in that also wrap
It includes：
After time phosphorus oxygen is melted into positive phosphorus, precipitating reagent is added into the waste water containing positive phosphorus, so that positive phosphorus precipitates in waste water, to
Recycle the phosphorus in waste water.
10. the method for recycling heavy metal nickel in chemically nickel-plating waste water according to claim 9, which is characterized in that described
Precipitating reagent is selected from least one of calcium salt, aluminium salt, magnesium salts and molysite.
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