发明授权
- 专利标题: Fixation and stabilization of metals in contaminated soils and materials
- 专利标题(中): 污染土壤和材料中金属的固定和稳定
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申请号: US942803申请日: 1997-10-02
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公开(公告)号: US5916123A公开(公告)日: 1999-06-29
- 发明人: Dhiraj Pal , Karl W. Yost
- 申请人: Dhiraj Pal , Karl W. Yost
- 申请人地址: NY Niagara Falls
- 专利权人: Sevenson Environmental Services, Inc.
- 当前专利权人: Sevenson Environmental Services, Inc.
- 当前专利权人地址: NY Niagara Falls
- 主分类号: A62D3/00
- IPC分类号: A62D3/00 ; A62D3/33 ; A62D101/24 ; A62D101/43 ; B09B3/00 ; B09C1/08 ; C02F11/00 ; C04B28/34 ; G21F9/30 ; E02D3/00 ; G21F9/00
摘要:
The present invention discloses a method of treating lead bearing process materials and lead toxic hazardous wastes. The invention relates to treatment methods employed to chemically convert leachable lead in lead bearing solid and liquid waste materials to a non-leachable form by mixing the material with lime, gypsum and/or phosphoric acid. The solid and liquid waste materials include contaminated sludges, slurries, soils, wastewaters, spent carbon, sand, wire chips, plastic fluff, cracked battery casings, bird and buck shots and tetraethyl lead contaminated organic peat and muck. The present invention discloses a process comprising a single step mixing of one or more treatment additives, and a process comprising a two step mixing wherein the sequence of performing the steps may be reversible. The present invention provides a new way of treating a universe of lead contaminated materials at any pH.
公开/授权文献
- US5499043A Portable recording apparatus with included recording unit 公开/授权日:1996-03-12