JPS5645788A - Treatment of chromium-containing solid or liquid waste material - Google Patents
Treatment of chromium-containing solid or liquid waste materialInfo
- Publication number
- JPS5645788A JPS5645788A JP12097279A JP12097279A JPS5645788A JP S5645788 A JPS5645788 A JP S5645788A JP 12097279 A JP12097279 A JP 12097279A JP 12097279 A JP12097279 A JP 12097279A JP S5645788 A JPS5645788 A JP S5645788A
- Authority
- JP
- Japan
- Prior art keywords
- chromium
- ferric sulphate
- hexavalent chromium
- hexavalent
- waste material
- 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 prevent hexavalent chromium from being generated in an incineration ash, by directly mixing a solid or a liquid waste material containing either one of hexavalent and trivalent chromium or both of them with a sulphate and incinerating the obtained mixture.
CONSTITUTION: In treating a solid or a liquid waste material by mixing ferric sulphate therewith, a chemical mechanism wherein hexavalent chromium is not formed is based on the fact that hexavalent chromium is reduced to trivalent chromium because SO2 gas generated by heating ferric sulphate shows strong reducibility. For example, in one embodiment, to 10kg of a sludge of a chromium plating factory containing 3,800mg/kg of chromium as trivalent chromium, a waste acid containing ferric sulphate [containing 4% as Fe2(SO4)3] is mixed with stirring and the obtained mixture is incinerated at 700°C for 30min in a fluidized bed type incinerator and, if an amount of hexavalent chromium in an effluent liquid is measured by a regular method, 247mg/l of hexavalent chromium is detected in the case of using no ferric sulphate at all and, if ferric sulphate is added in an amount of 0.5 times or more in the weight ratio to incinerate said mixture, hexavalent chromium is not detected at all.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12097279A JPS5645788A (en) | 1979-09-20 | 1979-09-20 | Treatment of chromium-containing solid or liquid waste material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12097279A JPS5645788A (en) | 1979-09-20 | 1979-09-20 | Treatment of chromium-containing solid or liquid waste material |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5645788A true JPS5645788A (en) | 1981-04-25 |
Family
ID=14799580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12097279A Pending JPS5645788A (en) | 1979-09-20 | 1979-09-20 | Treatment of chromium-containing solid or liquid waste material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5645788A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009281608A (en) * | 2008-05-20 | 2009-12-03 | Tsukishima Kankyo Engineering Ltd | Incineration disposal method and device for chromium-containing waste liquid |
JP2013200117A (en) * | 2013-05-22 | 2013-10-03 | Tsukishima Kankyo Engineering Ltd | Incineration disposal device and incineration disposal method of chromium-containing waste liquid |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4913078A (en) * | 1972-05-19 | 1974-02-05 |
-
1979
- 1979-09-20 JP JP12097279A patent/JPS5645788A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4913078A (en) * | 1972-05-19 | 1974-02-05 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009281608A (en) * | 2008-05-20 | 2009-12-03 | Tsukishima Kankyo Engineering Ltd | Incineration disposal method and device for chromium-containing waste liquid |
JP2013200117A (en) * | 2013-05-22 | 2013-10-03 | Tsukishima Kankyo Engineering Ltd | Incineration disposal device and incineration disposal method of chromium-containing waste liquid |
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