JPS5724690A - Disposal of cyanide-contng. waste water - Google Patents
Disposal of cyanide-contng. waste waterInfo
- Publication number
- JPS5724690A JPS5724690A JP9960480A JP9960480A JPS5724690A JP S5724690 A JPS5724690 A JP S5724690A JP 9960480 A JP9960480 A JP 9960480A JP 9960480 A JP9960480 A JP 9960480A JP S5724690 A JPS5724690 A JP S5724690A
- Authority
- JP
- Japan
- Prior art keywords
- waste water
- cyanide
- iron
- water
- contng
- 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
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
PURPOSE: To remove a cyanide ion in waste water containing heavy metals other than iron, by adding a ferrous salt into cyanide-contng. waste water under an acidic condition, and adding a reducing agent into the water in the presence of an alkaline earth metal oxide or hydroxide.
CONSTITUTION: Waste water containing cyanides and one or more heavy metals other than iron is adjusted at pH1W6 by addition of sulfuric acid or the like, and a ferrous salt such as ferrous sulfate is added to the water at a rate of 1/6mol or more of the cyanide concentration. Then the waste water is adjusted at pH7W11 by an oxide or hydroxide of Mg or Ca, and a reducing agent, e.g. Na2SO3 or NaHSO3, and added to the waste water at a rate of 1/10W1/2mol of the ferrous salt used. Thereafter, the waste water is kept for 15W60min at 30W90°C, to generate precipitates of iron ferrocyanide and various metal compounds. A high molecular flocculant may be used if necessary to separate the precipitates from the water.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9960480A JPS5724690A (en) | 1980-07-21 | 1980-07-21 | Disposal of cyanide-contng. waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9960480A JPS5724690A (en) | 1980-07-21 | 1980-07-21 | Disposal of cyanide-contng. waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5724690A true JPS5724690A (en) | 1982-02-09 |
Family
ID=14251688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9960480A Pending JPS5724690A (en) | 1980-07-21 | 1980-07-21 | Disposal of cyanide-contng. waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5724690A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4530768A (en) * | 1984-02-06 | 1985-07-23 | Director-General Of The Agency Of Industrial Science And Technology | Method for the disposal of waste water containing iron-cyanide complexes |
| KR100291461B1 (en) * | 1998-10-12 | 2001-06-01 | 홍영철 | Pretreatment Method of Cyanide Wastewater in Heavy Metals |
| JP2013226510A (en) * | 2012-04-25 | 2013-11-07 | Kurita Water Ind Ltd | Treating method and treating agent of cyanogen-containing wastewater |
| JP2018039004A (en) * | 2016-09-02 | 2018-03-15 | 日鉄住金環境株式会社 | Method for processing waste water |
-
1980
- 1980-07-21 JP JP9960480A patent/JPS5724690A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4530768A (en) * | 1984-02-06 | 1985-07-23 | Director-General Of The Agency Of Industrial Science And Technology | Method for the disposal of waste water containing iron-cyanide complexes |
| KR100291461B1 (en) * | 1998-10-12 | 2001-06-01 | 홍영철 | Pretreatment Method of Cyanide Wastewater in Heavy Metals |
| JP2013226510A (en) * | 2012-04-25 | 2013-11-07 | Kurita Water Ind Ltd | Treating method and treating agent of cyanogen-containing wastewater |
| JP2018039004A (en) * | 2016-09-02 | 2018-03-15 | 日鉄住金環境株式会社 | Method for processing waste water |
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