CN85109068A - The chemical reduction precipitator method and photocatalytic oxidation are handled electroplating sewerage - Google Patents
The chemical reduction precipitator method and photocatalytic oxidation are handled electroplating sewerage Download PDFInfo
- Publication number
- CN85109068A CN85109068A CN198585109068A CN85109068A CN85109068A CN 85109068 A CN85109068 A CN 85109068A CN 198585109068 A CN198585109068 A CN 198585109068A CN 85109068 A CN85109068 A CN 85109068A CN 85109068 A CN85109068 A CN 85109068A
- Authority
- CN
- China
- Prior art keywords
- electroplating sewerage
- chemical reduction
- precipitator method
- water
- handled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
A kind of method with the chemical Treatment electroplating sewerage, characteristics of the present invention are to adopt the chemical reduction precipitation agent of a kind of BaS of containing, can make the CN in the electroplating sewerage
-Reach the industrial discharge standard, make Cr
6+The Restore All precipitation makes heavy metal (Zn
2++ Cu
2++ Ni
2++ Sn
2++ Pb
2++ Fe
2+Deng) all precipitate, remove the SO in anhydrating
4 2-Adjust the pH value of water.
Water after present method is handled can be recycled, and throw out can be with manufacturing coating or refining useful metal.
Description
Handle electroplating sewerage, many in recent years employing electrolysis remove Cr
6+, with the NaClO oxidation CN of diaphragm-free electrolysis salt solution generation
-; The also useful chemical reduction precipitator method such as ferrous sulfate lime method, reduction Cr
6+Transfer pH value again.But two kinds of methods all can not be except that the heavy metal (Zn in the decontaminated water in the past
2+Cu
2+Ni
2+Sn
2+Fe
2+Deng) and the former consume a large amount of electric energy, salt, steel plate.The chromium mud that produces generally can not get reasonably handling causing secondary pollution; The latter produces a large amount of flockss, and is very difficult in the processing, often makes the water of discharge contain heavy metal and outstanding absurd creature all surpasses the industrial discharge standard.
Big-and-middle-sized Electroplate Factory adopts the electrolytic process processing electroplating sewerage that combines with ion exchange method, needs facility investment expense hundreds of thousands of unit, handle waste water per ton with 1～2 yuan, and the chromic acid that contains impurity of recovery can not return use.
The present invention seeks to adopt the chemical reduction precipitation agent of a kind of BaS of containing, can make the CN in the electroplating sewerage
-A part is the indissoluble complex compound sediment and reaches the industrial discharge standard by a catalyzed oxidation part, makes Cr
6+Restore All is Cr(OH)
3Precipitation makes heavy metal (Zn
2+Cu
2+Ni
2+Sn
2+Pb
2+Fe
2+Deng) all be sulfide precipitation, remove the SO in the water
2+ 4Adjusted pH value.
Feature of the present invention is that sewage disposal is combined with sedimentary comprehensive utilization, is used for zinc-plated, chromed plating shop, and the water after the processing can be recycled, and gained precipitation major ingredient is: ZnS BaSO
4Cr(OH)
3, being pea green, the fineness high covering power is by force the raw material of first-class coating for internal and external wall.
The present invention also is applicable to the sewage of handling cyanidization metallurgy and containing non-ferrous metal, precious metal ion, and recyclable non-ferrous metal and precious metal.
Technological process of the present invention:
Zincing passivation sewage mixes (accent pH value)/() illumination or Exposure to Sunlight 2～3 hours (adding the BaS precipitation agent stirs)/() clarification (2～4 hours) supernatant water and recycles filtering separation throw out system coating with chromium plating sewage.
Contain CN in, the copper facing sewage zinc-plated as cyaniding
-Below 5mg/l, can remove the Exposure to Sunlight process of photochemical catalytic oxidation from.
Specific embodiment:
The plating shop of Tangshan City two Hardware Tools Factories has zinc-plated, copper facing, nickel plating, zinc-plated, chromium plating, and waste water mixes back PH=5～5.5
Contain: Cr
6+100～120mg/l Zn
2+20～50mg/l
CN
-0.5～5mg/l Cu
2+0.5～5mg/l
Still contain small amount of N i
2+Sn
2+Deng, after chemical precipitation method is handled, then can reach splendid effect without Exposure to Sunlight or illumination.
The environmental monitoring station result of laboratory test is as follows through the Tangshan City:
CN
-0.035mg/l Cr
6+0.23mg/l
Cu
2+Zn
2+Do not detect
PH＝7
Before adding precipitation agent or after adding precipitation agent, through Exposure to Sunlight 2～3 hours, the quarantine station result of laboratory test was as follows through the Tangshan City as sewage:
CN
-0.011mg/l
Cr
6+Zn
2+Cu
2+Do not detect
PH＝7
Advantage of the present invention:
1. be applicable to the sewage disposal of large, medium and small each type Electroplate Factory. Equipment is simple, instant effect, and the efficient height, the water after the processing can be recycled.
2. the present invention combines sewage disposal with producing coating, makes waste water control become profit by costing a lot of money.
Claims (2)
1, handle electroplating sewerage with the chemical reduction precipitator method, the feature of present method is to handle electroplating sewerage with BaS for the precipitate reduction agent.
2, handle other according to the method for claim 1 and contain CN
-SO
2- 4And the sewage of metal ion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85109068A CN85109068B (en) | 1985-12-17 | 1985-12-17 | Treatment of sewage from plating works by chemical reduction precipitation and light catalytic oxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85109068A CN85109068B (en) | 1985-12-17 | 1985-12-17 | Treatment of sewage from plating works by chemical reduction precipitation and light catalytic oxidation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85109068A true CN85109068A (en) | 1987-01-24 |
| CN85109068B CN85109068B (en) | 1988-10-12 |
Family
ID=4796229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85109068A Expired CN85109068B (en) | 1985-12-17 | 1985-12-17 | Treatment of sewage from plating works by chemical reduction precipitation and light catalytic oxidation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85109068B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354215C (en) * | 2006-01-18 | 2007-12-12 | 梁林标 | Zero-discharge reclamation method of electroplating wastewater and apparatus thereof |
| CN105330064A (en) * | 2015-11-17 | 2016-02-17 | 紫金矿业集团股份有限公司 | Zinc-containing cyanide barren solution treatment method |
| WO2016197397A1 (en) * | 2015-06-12 | 2016-12-15 | 苏州大学张家港工业技术研究院 | Preparation method and use of photocatalytic degradation-adsorption material |
-
1985
- 1985-12-17 CN CN85109068A patent/CN85109068B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354215C (en) * | 2006-01-18 | 2007-12-12 | 梁林标 | Zero-discharge reclamation method of electroplating wastewater and apparatus thereof |
| WO2016197397A1 (en) * | 2015-06-12 | 2016-12-15 | 苏州大学张家港工业技术研究院 | Preparation method and use of photocatalytic degradation-adsorption material |
| CN105330064A (en) * | 2015-11-17 | 2016-02-17 | 紫金矿业集团股份有限公司 | Zinc-containing cyanide barren solution treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85109068B (en) | 1988-10-12 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |