Extraction of chromium, copper, and arsenic from CCA-treated wood using biodegradable chelating agents.
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.
Ko
Chun-Han
CH
School of Forestry and Resources Conservation, National Taiwan University, Taipei 106, Taiwan, ROC.
Chen
Pin-Jui
PJ
Chen
Shu-Hui
SH
Chang
Fang-Chih
FC
Lin
Far-Ching
FC
Chen
Ke-Kung
KK
D001149:Arsenates / Q000494:pharmacology*; D001151:Arsenic / Q000302:isolation & purification*; D001673:Biodegradation, Environmental / Q000187:drug effects; D002614:Chelating Agents / Q000494:pharmacology*; D002857:Chromium / Q000302:isolation & purification*; D003300:Copper / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D014934:Wood / Q000187:drug effects*
D001149:Arsenates; D002614:Chelating Agents; D002857:Chromium; C040890:chromated copper arsenate; D003300:Copper; D001151:Arsenic