发明名称 |
Extraction and treatment of heavy metals |
摘要 |
Contaminated waste streams or soil or sludge is subjected to a first treatment stage with an acid liquor at a pH below 2 and at a solids content from 5 to 30%; then the liquid and solid phases from the first treatment stage are separated; the solids from the first treatment stage are mixed with a fresh acid liquor at a pH below 2 and a solids content from 5 to 30%; the liquid and solid phases from the second treatment stage are separated; the liquor separated from the first treatment stage is reacted with a base to precipitate the metals; the precipitated metals are separated and the liquor is recycled for reuse in the process; the solids separated from the second treatment stage are neutralized to adjust the pH to a level acceptable for a soil conditioner or fertilizer or other customized products; and the liquor from the second stage is used as the acidic liquor in the first treatment stage.
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申请公布号 |
US2006113254(A1) |
申请公布日期 |
2006.06.01 |
申请号 |
US20050542304 |
申请日期 |
2005.07.15 |
申请人 |
HELLER BODO;STARKS CHIRSTOPHER M |
发明人 |
HELLER BODO;STARKS CHIRSTOPHER M. |
分类号 |
C02F1/52;B09B3/00;B09C1/02;C02F1/66;C02F11/00;C05D9/00;C05F7/00 |
主分类号 |
C02F1/52 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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