JPS5443172A - Treating method for chromium-containing material - Google Patents
Treating method for chromium-containing materialInfo
- Publication number
- JPS5443172A JPS5443172A JP11034377A JP11034377A JPS5443172A JP S5443172 A JPS5443172 A JP S5443172A JP 11034377 A JP11034377 A JP 11034377A JP 11034377 A JP11034377 A JP 11034377A JP S5443172 A JPS5443172 A JP S5443172A
- Authority
- JP
- Japan
- Prior art keywords
- contg
- alkali metal
- water
- mixt
- sol
- 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.)
- Granted
Links
Landscapes
- Fire-Extinguishing Compositions (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
PURPOSE: To reduce and fix Cr6+ to Cr3+ by adding a mineral acid and a refusing agent such as water-sol. ferrous salt or alkali metal sulfide etc. to Cr6+-contg. material of specific pH, and by kneading the mixt. to form water-contg. or pasty material.
CONSTITUTION: To a Cr6+-contg. material of pH not lower than 9 (when converted to 10wt% slurry) are added a mineral acid in an amount to reduce the pH to 7 or lowr and a reducing agent described below, then the mixt. is kneaded and left to stand, so as to dry and keep it at water-contg. or pasty, wet state for 4 or more days. For the reducing agent is used water-sol. ferrous salt, e.g., FeSO4 etc., alkali metal sulfide, e.g., Na2S etc., alkali (-earth) metal hydrosulfied, e.g., NaHS, alkali metal (acid) sulfite, or alkali metal thiouslfate.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11034377A JPS5443172A (en) | 1977-09-12 | 1977-09-12 | Treating method for chromium-containing material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11034377A JPS5443172A (en) | 1977-09-12 | 1977-09-12 | Treating method for chromium-containing material |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5443172A true JPS5443172A (en) | 1979-04-05 |
JPS5540310B2 JPS5540310B2 (en) | 1980-10-17 |
Family
ID=14533340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11034377A Granted JPS5443172A (en) | 1977-09-12 | 1977-09-12 | Treating method for chromium-containing material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5443172A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5615883A (en) * | 1979-07-17 | 1981-02-16 | Toshiaki Sugawara | Drying and incinerating treatment of solid or liquid waste material containing chromium |
JPS56152776A (en) * | 1980-04-25 | 1981-11-26 | Ebara Infilco Co Ltd | Treatment of waste matter containing heavy metal |
JPS6254313A (en) * | 1986-08-29 | 1987-03-10 | Toshiba Corp | Constant voltage circuit |
US5571489A (en) * | 1995-01-27 | 1996-11-05 | Illinois Institute Of Technology | Process for chromium recovery from aqueous solutions |
DE19643982A1 (en) * | 1996-10-31 | 1997-06-26 | Vve Gmbh Chemnitz | Method of removing toxic pollutants from solid industrial waste |
JP2005254082A (en) * | 2004-03-10 | 2005-09-22 | Nippon Steel & Sumikin Stainless Steel Corp | Method for controlling elution of hexavalent chromium from steel slug and material for land burial of the slug |
JP2010082539A (en) * | 2008-09-30 | 2010-04-15 | Kurita Water Ind Ltd | Method of treating soil or slag |
ITVE20090034A1 (en) * | 2009-07-09 | 2011-01-10 | Veneta Depuratori E Affini S Ve D A Soc | PROCEDURE FOR TREATING ASHES OBTAINED IN WASTE INCINERATION PLANTS.- |
CN109604312A (en) * | 2019-01-09 | 2019-04-12 | 北京金隅琉水环保科技有限公司 | A kind of method of trap heavy metals during flying dust water-washing pre-treatment |
-
1977
- 1977-09-12 JP JP11034377A patent/JPS5443172A/en active Granted
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5615883A (en) * | 1979-07-17 | 1981-02-16 | Toshiaki Sugawara | Drying and incinerating treatment of solid or liquid waste material containing chromium |
JPS56152776A (en) * | 1980-04-25 | 1981-11-26 | Ebara Infilco Co Ltd | Treatment of waste matter containing heavy metal |
JPS6254313A (en) * | 1986-08-29 | 1987-03-10 | Toshiba Corp | Constant voltage circuit |
JPH0346848B2 (en) * | 1986-08-29 | 1991-07-17 | Tokyo Shibaura Electric Co | |
US5571489A (en) * | 1995-01-27 | 1996-11-05 | Illinois Institute Of Technology | Process for chromium recovery from aqueous solutions |
DE19643982A1 (en) * | 1996-10-31 | 1997-06-26 | Vve Gmbh Chemnitz | Method of removing toxic pollutants from solid industrial waste |
JP2005254082A (en) * | 2004-03-10 | 2005-09-22 | Nippon Steel & Sumikin Stainless Steel Corp | Method for controlling elution of hexavalent chromium from steel slug and material for land burial of the slug |
JP2010082539A (en) * | 2008-09-30 | 2010-04-15 | Kurita Water Ind Ltd | Method of treating soil or slag |
ITVE20090034A1 (en) * | 2009-07-09 | 2011-01-10 | Veneta Depuratori E Affini S Ve D A Soc | PROCEDURE FOR TREATING ASHES OBTAINED IN WASTE INCINERATION PLANTS.- |
CN109604312A (en) * | 2019-01-09 | 2019-04-12 | 北京金隅琉水环保科技有限公司 | A kind of method of trap heavy metals during flying dust water-washing pre-treatment |
Also Published As
Publication number | Publication date |
---|---|
JPS5540310B2 (en) | 1980-10-17 |
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