Recovery of copper, chromium, and arsenic compounds from the waste preservative-treated wood

IRG/WP 3651

A Honda, Y Kanjo, A Kimoto, K Koshii, S Kashiwazaki

In Japan, about 40 percents of waste wood is incinerated and the residue is dumped into the landfill site. The waste preservative-treated wood, which is mixed in nontreated wood, is incinerated in the same way, too. However, it will cause the serious problems that the gases contained with high concentration arsenic compounds are discharged from the smokestacks of the incineration facilities and the toxic water with high concentrations of copper, chromium, and arsenic compounds is discharged around landfill sites because the residue contains a lot of these compounds. To solve these problems, it is necessary to develop a method to recover these compounds from the waste preservative-treated wood. In this paper, extraction experiments of copper, chromium, and arsenic compounds from treated wood were carried out and evaluated as a method to recover these compounds. Through the experiments, suitable extractant, its concentration, and extraction conditions such as the temperature, extraction time, and the size of test wood piece were obtained. As the results of these experiments, Cr, Cu, and As compounds in the test wood piece were completely recovered into the extractant under the suitable conditions.


Keywords: ARSENIC; CHROMIUM; COPPER; ENVIRONMENT; EXTRACTION; RECYCLING; JAPAN; TREATED WOOD; WASTE MANAGEMENT; WATER POLLUTION CONTROL

Conference: 91-05-20/24 Kyoto, Japan


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