JPS5549187A - Waste liquid treatment method - Google Patents
Waste liquid treatment methodInfo
- Publication number
- JPS5549187A JPS5549187A JP12134578A JP12134578A JPS5549187A JP S5549187 A JPS5549187 A JP S5549187A JP 12134578 A JP12134578 A JP 12134578A JP 12134578 A JP12134578 A JP 12134578A JP S5549187 A JPS5549187 A JP S5549187A
- Authority
- JP
- Japan
- Prior art keywords
- waste liquid
- copper
- ammonium persulfate
- liquid
- ion concentration
- 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.)
- Pending
Links
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
PURPOSE: To reduce the copper ion concentration in waste liquid to a great extent, by adding waste liquid of chemical copper plating in the copper etching waste liquid of ammonium persulfate to turn acid, and electrolyzing by using insoluble anode.
CONSTITUTION: A copper etching waste liquid of ammonium persulfate containing copper ions, ammonium persulfate and ammonium sulfate, and a reducing liquid such as chemical copper plating waste liquid, containing copper ions as copper sulfate, formalin, caustic soda, chelating agent, organic inhibitor, etc., capable of causing Fehiling's reaction, are mixed by 1:1 ratio. Under the acid condition of pH 5 or less, this mixture waste liquid is electrolyzed by using ferrite electrode as insoluble anode. At this time, the liquid temperature should be 20W80°C, while the cathode current density should be 0.5A/dm2 2 or more. The copper ions in the waste liquid are electrodeposited on the cathode as metal copper, so that the copper ion concentration in the waste liquid may be greatly decreased to about 0.25ppm or less.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12134578A JPS5549187A (en) | 1978-10-02 | 1978-10-02 | Waste liquid treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12134578A JPS5549187A (en) | 1978-10-02 | 1978-10-02 | Waste liquid treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5549187A true JPS5549187A (en) | 1980-04-09 |
Family
ID=14808962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12134578A Pending JPS5549187A (en) | 1978-10-02 | 1978-10-02 | Waste liquid treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5549187A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106373627A (en) * | 2016-09-27 | 2017-02-01 | 华东理工大学 | A method for electrochemically synthesizing ferrite to treat nuclear power plant radioactive waste liquid |
| CN110144459A (en) * | 2019-04-24 | 2019-08-20 | 常州技天电子有限公司 | A kind of pcb board microetch processor containing micro-corrosion liquid and application method |
-
1978
- 1978-10-02 JP JP12134578A patent/JPS5549187A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106373627A (en) * | 2016-09-27 | 2017-02-01 | 华东理工大学 | A method for electrochemically synthesizing ferrite to treat nuclear power plant radioactive waste liquid |
| CN110144459A (en) * | 2019-04-24 | 2019-08-20 | 常州技天电子有限公司 | A kind of pcb board microetch processor containing micro-corrosion liquid and application method |
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