| Original document(7 pages) Authorized document(7 pages) 中文版 |
This invention relates to a method for quick treatment of chromium-contained waste water. Its process is as follows: iron hydroxide precipitated liquid (pH=8.9-1.0) is leated in a filter-tank, and drawing the chromium-contained waste water (pH=5.5-8.0) into it under stirring, through evacuated filtration, free from chromium ion water is obtained. The process adopts a combined technique of pptn. redn. and absorption to improve that method which uses ferrous sulfate for only increasing acidity to reduce the chromium ion with a valency of six into three valence, it can treat the waste water which contains six valence chromium ion from tens to thousands milligram per litre. |
Application Number
申请号 |
90105123 |
Application Date
申请日 |
1990.05.24 |
| Title 名称 |
Adsorbing reduction precipitation method for quickly treating chromium-bearing waste water |
Publication Number
公开号 |
1046513 |
Publication Date
公开日 |
1990.10.31 |
| Approval Pub. Date |
|
Granted Pub. Date |
1995.06.07 |
| International Classification 分类号 |
C02F1/62,C02F1/70 |
Applicant(s) Name
申请人 |
Shenyang Inst. of Geology and Minerals, Ministry of Geology and Minerals |
| Address 地址 |
110032 |
| Inventor(s) Name 发明人 |
Cao Chenghu, Li Huafang |
| Attorney & Agent 代理人 |
YANG BIN |
| More information 更 多 信 息 |
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