CN100390075C - Electrolysis method for recovering nickel(II) from waste water using active carbon as electrode - Google Patents
Electrolysis method for recovering nickel(II) from waste water using active carbon as electrode Download PDFInfo
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- CN100390075C CN100390075C CNB200410023427XA CN200410023427A CN100390075C CN 100390075 C CN100390075 C CN 100390075C CN B200410023427X A CNB200410023427X A CN B200410023427XA CN 200410023427 A CN200410023427 A CN 200410023427A CN 100390075 C CN100390075 C CN 100390075C
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- waste water
- nickel
- nickelous
- activated carbon
- electrode
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Abstract
The present invention discloses a new technological method for recovering nickel (II) from waste water, which belongs to the technical field of electrochemistry application. The technological method has the technical key point that active carbon is used as a cathode, the adsorbability of nickel hydroxide generated by electrolysis is enlarged, the recovered nickel hydroxide is pure, and the recovery rate of nickel (II) can be more than 99%. The technological method has the advantages of simple technology, easy operation, less power consumption, low cost, and reduction of the environmental pollution of waste water, and can be used for electroplating the waste water, recovering the nickel (II) in electroplating waste water, chemical plating waste water and all nickel (II)-containing waste water, and the nickel (II) is used for producing chemical raw materials or chemical reagents.
Description
Technical field:
The invention belongs to the electrochemical applications new process.
Background technology:
Mainly take the precipitation-air-flotation method at present for from waste water, reclaiming nickelous, this method complex process need consume a large amount of alkali, gas floatation agent and pressurized air, and bad collection after the nickel hydroxide precipitate thing air supporting that generates, impure more in the throw out, the subsequent disposal difficulty.
Summary of the invention:
Utilize gac to do negative electrode, do anode with metallic lead, in waste water, add a small amount of sodium sulfate and carry out electrolysis, when direct current passes through electrode, owing near pH value having hydrogen to separate out to cause negative electrode on the negative electrode raises, when bivalent nickel ion near electric field action is moved to negative electrode, have little time to take place electrochemical reducting reaction and just be deposited on gac and the cathode sheath surface with the form of nickel hydroxide.Activated carbon electrodes taken out from waste water with dilute sulphuric acid (dilute hydrochloric acid or rare nitric acid) dissolving just obtains corresponding nickel salt solution, again through purify, concentrate, the crystallization processes process can obtain purified corresponding solid nickel salt.Reaction formula is as follows:
Ni
2++2OH
-＝Ni(OH)
2
Ni(OH)
2+H
2SO
4＝NiSO
4+2H
2O
(Ni(OH)
2+2HCl＝NiCl
2+2H
2O
Ni(OH)
2+2HNO
3＝Ni(NO
3)
2+2H
2O)
The advantage of this method is: simplified the technological process that reclaims nickelous from waste water, improved the purity that reclaims nickel hydroxide; It is fast to reclaim nickelous speed from waste water; The rate of recovery height of nickelous; Can from contain the lower waste water of nickelous concentration, reclaim nickelous; Little power consumption; Production cost is low.
Description of drawings:
Negative electrode is done conducting matrix grain with metallic lead, loads 30 orders-50 purpose gac around the skeleton, and skeleton and gac are contained in the cathode sheath.Cathode sheath can be made of woven dacron.As shown in Figure 1.
Embodiment:
Be to adopt the present invention to reclaim the specific embodiment that nickelous in the waste water is produced chemical reagent of sulfuric acid nickel below:
(it is lower generally to contain nickelous concentration in because of waste water to add a small amount of sodium sulfate in containing nickelous waste water, adding sodium sulfate increases solution conductivity, and makes lead anode become insoluble electrode), waste water ph is regulated and control between 6～8, pass to direct current, current density is controlled at 0.05A/cm
2(skeleton area), when direct current passes through electrode, cause near the pH value of negative electrode to raise owing to there being hydrogen to separate out on the negative electrode, when bivalent nickel ion near electric field action is moved to negative electrode, having little time to take place reduction reaction just is deposited on the surface of the surface of gac and electrode sleeve with the form of nickel hydroxide, regularly activated carbon cathode is taken out from waste water, promptly can be made into corresponding nickel sulfate solution with dilute sulphuric acid dissolved hydrogen nickel oxide, again through obtaining more purified nickel sulfate solid as Fig. 2 technical process.
Claims (2)
1. the method for nickelous in the activated carbon electrodes electrolytic recovery waste water is characterized in that utilizing activated carbon cathode and lead anode, adds 10 grams-20 gram sodium sulfate (Na in every liter of waste water
2SO
4.10H
2O) under logical galvanic situation, the nickelous in the waste water is deposited on gac and the cathode sheath surface with the form of nickel hydroxide, through the peracid dissolving, purify, concentrate, crystallization reclaimed with the solid nickel salt.
2. according to claim 1, the method of nickelous in the activated carbon electrodes electrolytic recovery waste water, it is characterized in that: adopt metallic lead as the activated carbon electrodes conducting matrix grain, electrode skeleton is contained in the cathode sheath of making of woven dacron, and around conducting matrix grain, load 30 orders～50 purpose gacs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410023427XA CN100390075C (en) | 2004-01-12 | 2004-01-12 | Electrolysis method for recovering nickel(II) from waste water using active carbon as electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410023427XA CN100390075C (en) | 2004-01-12 | 2004-01-12 | Electrolysis method for recovering nickel(II) from waste water using active carbon as electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1557733A CN1557733A (en) | 2004-12-29 |
| CN100390075C true CN100390075C (en) | 2008-05-28 |
Family
ID=34352128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410023427XA Expired - Fee Related CN100390075C (en) | 2004-01-12 | 2004-01-12 | Electrolysis method for recovering nickel(II) from waste water using active carbon as electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100390075C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215638B (en) * | 2008-01-11 | 2010-10-13 | 昆明理工大学 | Method for eluting nickel from nickel-carrying activated carbon by washing powder solution |
| CN101717135B (en) * | 2009-12-04 | 2012-05-30 | 浙江师范大学 | Method for treating nickel-containing electroplating wastewater and recovering nickel by electrolysis |
| CN109422332A (en) * | 2017-08-21 | 2019-03-05 | 光大水务科技发展（南京）有限公司 | Treating Electroplate Wastewater Containing Nickel processing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3650925A (en) * | 1969-06-02 | 1972-03-21 | Ppg Industries Inc | Recovery of metals from solution |
-
2004
- 2004-01-12 CN CNB200410023427XA patent/CN100390075C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3650925A (en) * | 1969-06-02 | 1972-03-21 | Ppg Industries Inc | Recovery of metals from solution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1557733A (en) | 2004-12-29 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080528 Termination date: 20100212 |