Effect of pyrolysis on solvent extractability of toxic metals from chromated copper arsenate (CCA)-treated wood

被引：18

作者：

Kakitani, T

Hata, T ^{[1
]}

Kajimoto, T

Imamura, Y

机构：

[1] Kyoto Univ, Wood Res Inst, Uji, Kyoto 6110011, Japan

[2] Ind Technol Ctr Wakayama Prefecture, Wakayama 6496261, Japan

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2004年 / 109卷 / 1-3期

关键词：

CCA-treated wood; pyrolysis; solvent extraction;

D O I：

10.1016/j.jhazmat.2004.01.016

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Solvent extraction was conducted to investigate the behavior of toxic metals in chromated copper arsenate (CCA)-treated wood and its pyrolysis residue. Four kinds of solvents, along with sulfuric and phosphoric acid as mineral agents, and citric and oxalic acid as complexing agents, were used. The CCA elements from the wood treated without pyrolysis were easily extracted. However, only a small amount of CCA elements were extracted from the pyrolyzed residue, even under very low pH conditions. The toxic elements in the pyrolyzed wood showed high stabilization against the solvent extraction. Pyrolysis strongly immobilized the toxic elements in the residue. Therefore, pyrolysis is not suitable as a pretreatment. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：53 / 57

页数：5

共 16 条

[1] CCA removal from treated wood using a dual remediation process [J].