发明名称 |
Process for removing heavy metals from soil |
摘要 |
Heavy metals are efficiently removed from contaminated soil by a process which comprises leaching or washing the soil with a mild leachant solution comprised of an aqueous solution of an acid and a salt. Heavy metals are also efficiently removed from paint chips by washing with an aqueous acid. The heavy metals are recovered from the leachant be cementation.
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申请公布号 |
US5505925(A) |
申请公布日期 |
1996.04.09 |
申请号 |
US19940273256 |
申请日期 |
1994.07.11 |
申请人 |
COGNIS, INC. |
发明人 |
FRISTAD, WILLIAM E. |
分类号 |
B03B5/00;B09B3/00;B09C1/02;B09C1/10;C01G13/00;C01G21/00;C22B1/00;C22B3/04;C22B3/06;C22B3/16;C22B3/46;C22B7/00;C22B13/00;C22B15/00;C22B25/06;C22B43/00;(IPC1-7):C22B13/00 |
主分类号 |
B03B5/00 |
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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