JPS5724695A - Removal of cyanide from waste water - Google Patents
Removal of cyanide from waste waterInfo
- Publication number
- JPS5724695A JPS5724695A JP10031480A JP10031480A JPS5724695A JP S5724695 A JPS5724695 A JP S5724695A JP 10031480 A JP10031480 A JP 10031480A JP 10031480 A JP10031480 A JP 10031480A JP S5724695 A JPS5724695 A JP S5724695A
- Authority
- JP
- Japan
- Prior art keywords
- complex
- water
- vessel
- reaction vessel
- cyanide
- 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
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
PURPOSE: To simplify a process for precipitating and separating a cyanide as a complex salt of zinc-metal cyanocomplex which will not redissolve, by effecting the formation of the complex in an oxidizing vessel.
CONSTITUTION: Cyanide ion-contg. waste water 1 is introduced into the first reaction vessel 30 acting as an oxidizing vessel, where caustic soda 2, sodium hypochlorite 3 and a zinc compound 5 are added to the water, and then into the second reaction vessel 32, where sulfuric acid 4 and a reducing agent 6, e.g. sodium bisulfite, are added to the water. A water-posttreatment vessel 11 used in a conventional manner can be omitted on the recognition that a complex is stable and not redissolved as far as it is formed in the range of pH 6W12, in spite of the general view that the formation of the complex is effected at pH 9. In this regard, pH in the first reaction vessel 30 is at 10W11, while pH in the second reaction vessel 32 is at 7W8. Thereafter, the treated water flows into a thickener 15, where the complex is concentrated, settled and separated by the addition of a high molecular flocculant. The chemical formula of the complex is ZnK[M(CN)e]2.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10031480A JPS5724695A (en) | 1980-07-21 | 1980-07-21 | Removal of cyanide from waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10031480A JPS5724695A (en) | 1980-07-21 | 1980-07-21 | Removal of cyanide from waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5724695A true JPS5724695A (en) | 1982-02-09 |
Family
ID=14270709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10031480A Pending JPS5724695A (en) | 1980-07-21 | 1980-07-21 | Removal of cyanide from waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5724695A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104169226A (en) * | 2012-03-30 | 2014-11-26 | 栗田工业株式会社 | Method for treating cyanogen-containing waste water |
| CN105481077A (en) * | 2016-01-19 | 2016-04-13 | 张锐 | Household water purifying agent and preparation method thereof |
-
1980
- 1980-07-21 JP JP10031480A patent/JPS5724695A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104169226A (en) * | 2012-03-30 | 2014-11-26 | 栗田工业株式会社 | Method for treating cyanogen-containing waste water |
| CN105481077A (en) * | 2016-01-19 | 2016-04-13 | 张锐 | Household water purifying agent and preparation method thereof |
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