JPS57165088A - Purification of cyanogen-contng. waste water - Google Patents
Purification of cyanogen-contng. waste waterInfo
- Publication number
- JPS57165088A JPS57165088A JP4882681A JP4882681A JPS57165088A JP S57165088 A JPS57165088 A JP S57165088A JP 4882681 A JP4882681 A JP 4882681A JP 4882681 A JP4882681 A JP 4882681A JP S57165088 A JPS57165088 A JP S57165088A
- Authority
- JP
- Japan
- Prior art keywords
- waste water
- cyanogen
- contng
- reducing
- purification
- 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
Abstract
PURPOSE: To facilitate the purification of cyanogen-contng. waste water containing heavy metals, while reducing an amount of by-produced sludge, by reducing the cyanogen-contng. waste water in the presence of a copper salt, and then adjusting the pH value of the waste water at 1W4 to remove the resultant precipitate.
CONSTITUTION: A copper salt, e.g. cuprous chloride or cupric sulfate, is added to cyanogen-contng. waste water containing heavy metals such as Ni, Cr, Mn, Co, W, Zn and Pb. The waste water is then subjected to reducing treatment by the addition of a reducing agent or an electrolytical reducing method. The reducing agent, e.g. sodium sulfite, sodium hydrogensulfite or sodium thiosulfate, is added to the waste water at a rate of ten fold mol by cyanogen contained in the waste water. The reduction is done at 30W90°C. Thereafter, the reacted solution is adjusted at pH 1W4 by the addition of sulfuric or hydrochloric acid, to form precipitate. The formed precipitate is separated and removed by a manner such as filtering or sedimenting. In this way, the concentration of cyanogen in the filtrate is reduced to 1ppm or lower.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4882681A JPS57165088A (en) | 1981-04-01 | 1981-04-01 | Purification of cyanogen-contng. waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4882681A JPS57165088A (en) | 1981-04-01 | 1981-04-01 | Purification of cyanogen-contng. waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57165088A true JPS57165088A (en) | 1982-10-09 |
Family
ID=12814026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4882681A Pending JPS57165088A (en) | 1981-04-01 | 1981-04-01 | Purification of cyanogen-contng. waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57165088A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4622149A (en) * | 1984-05-23 | 1986-11-11 | Inco Limited | Effluent treatment |
| KR20180097263A (en) * | 2017-02-23 | 2018-08-31 | 한승케미칼 주식회사 | Waste water treatment method of removing fluorine and cyanides |
-
1981
- 1981-04-01 JP JP4882681A patent/JPS57165088A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4622149A (en) * | 1984-05-23 | 1986-11-11 | Inco Limited | Effluent treatment |
| KR20180097263A (en) * | 2017-02-23 | 2018-08-31 | 한승케미칼 주식회사 | Waste water treatment method of removing fluorine and cyanides |
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