Extraction of chromium, copper, and arsenic from CCA-treated wood using biodegradable chelating agents

Chun-Han Ko; Pin-Jui Chen; Shu-Hui Chen; Fang-Chih Chang; Far-Ching Lin; Ke-Kung Chen

doi:10.1016/j.biortech.2009.07.027

Extraction of chromium, copper, and arsenic from CCA-treated wood using biodegradable chelating agents

Bioresour Technol. 2010 Mar;101(5):1528-31. doi: 10.1016/j.biortech.2009.07.027. Epub 2009 Aug 18.

Authors

Chun-Han Ko¹, Pin-Jui Chen, Shu-Hui Chen, Fang-Chih Chang, Far-Ching Lin, Ke-Kung Chen

Affiliation

¹ School of Forestry and Resources Conservation, National Taiwan University, Taipei 106, Taiwan, ROC.

PMID: 19692235
DOI: 10.1016/j.biortech.2009.07.027

Abstract

The aim of this study was to investigate the biodegradable chelating agents S,S-ethylenediaminedisuccinic acid (SS-EDDS) and nitrilotriacetic acid (NTA) as potential alternatives and compare them with ethylenediaminetetraacetic acid (EDTA) for effectiveness. Extraction of heavy metals from chromated copper arsenate (CCA)-treated wood with EDDS, NTA, or EDTA solvent was evaluated at various solvent pH levels and stoichiometric ratios. Based on the present data, the recommended extraction conditions are pH 4.0 and EDDS-CCA stoichiometric ratios of 10.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Arsenates / pharmacology*
Arsenic / isolation & purification*
Biodegradation, Environmental / drug effects
Chelating Agents / pharmacology*
Chromium / isolation & purification*
Copper / isolation & purification*
Hydrogen-Ion Concentration / drug effects
Wood / drug effects*

Substances

Arsenates
Chelating Agents
Chromium
chromated copper arsenate
Copper
Arsenic