发明名称 |
PROCESS FOR DECONTAMINATION OF CHROMATED COPPER ARSENATE TREATED WOOD |
摘要 |
This invention relates to a chemical process of decontamination of chromated copper arsenate (CCA) treated wood. This process includes: i) at least one leaching step of metals from CCA-treated wood particles (solids content ranging from 20 to 200 g/L) with a diluted inorganic acid solution (0.05 to 1 N) at a temperature lower than 100.degree.C and for a period of time (0.5 to 24 h) sufficient to adequately solubilize arsenic, chromium and copper; ii) the separation of the wood particles from the acid solution; iii) at least one washing step of the wood particles in a solution in order to remove residual arsenic , chromium and copper; and iv) at least one treatment step for the recovery of metals from the acid leachates and washing waters. The decontaminated wood particles and the metals extracted from the CCA-treated wood can be safely disposed or recycled.
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申请公布号 |
CA2628642(A1) |
申请公布日期 |
2009.10.08 |
申请号 |
CA20082628642 |
申请日期 |
2008.04.08 |
申请人 |
INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE (INRS) |
发明人 |
JANIN, AMELIE;DROGUI, PATRICK;MERCIER, GUY;BLAIS, JEAN-FRANCOIS |
分类号 |
B27K5/00;A62D3/30 |
主分类号 |
B27K5/00 |
代理机构 |
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地址 |
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