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Published online 26 April 2006
Published in J Environ Qual 35:912-917 (2006)
DOI: 10.2134/jeq2005.0318
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
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A Novel Extractant for Removal of Hazardous Metals from Preservative-Treated Wood Waste

Tomo Kakitania, Toshimitsu Hataa,*, Takeshi Kajimotob and Yuji Imamuraa

a Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Uji, Kyoto 611-0011, Japan
b Industrial Technology Center of Wakayama Prefecture, Wakayama, 60 Ogura, Wakayama-shi 649-6261, Japan


Figure 1
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  		Fig. 1. Changes of percentage residual amount of arsenic, copper, or chromium in preservative-treated wood powder during sodium oxalate solvent extraction. The percentage residual elements content in the wood was defined as (element content in the wood after extraction)/(element content in the wood before extraction) x 100. (a) Percentage residual amount of arsenic, copper, and chromium in chromated copper arsenate (CCA)–treated wood powder during sodium oxalate solvent extraction. (b) Percentage residual amount of copper in ammoniacal copper quaternary (ACQ)–treated wood powder during sodium oxalate solvent extraction. (c) Percentage residual amount of copper in copper, boron, and azole (CuAz)–treated wood powder during sodium oxalate solvent extraction.

 

Figure 2
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  		Fig. 2. Changes of percentage residual amount of arsenic, copper, or chromium in chromated copper arsenate (CCA)–treated wood chips during sodium oxalate solvent extraction. (a) Percentage residual amount of arsenic, copper, and chromium in CCA-treated wood chips during sodium oxalate solvent extraction. (b) Percentage residual amount of copper in ammoniacal copper quaternary (ACQ)–treated wood chips during sodium oxalate solvent extraction. (c) Percentage residual amount of copper in copper, boron, and azole (CuAz)–treated chips during sodium oxalate solvent extraction. (d) Percentage residual amount of arsenic, copper, and chromium in the mixture of CCA-, ACQ-, and CuAz-treated wood chips during sodium oxalate solvent extraction.

 




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The SCI Journals Agronomy Journal Crop Science
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