title: Extraction of chromium, copper, and arsenic from CCA-treated wood using biodegradable chelating agents.
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.
authors.affiliation: School of Forestry and Resources Conservation, National Taiwan University, Taipei 106, Taiwan, ROC.
authors.forename: Chun-Han
authors.initials: CH
authors.lastname: Ko
authors.forename: Pin-Jui
authors.initials: PJ
authors.lastname: Chen
authors.forename: Shu-Hui
authors.initials: SH
authors.lastname: Chen
authors.forename: Fang-Chih
authors.initials: FC
authors.lastname: Chang
authors.forename: Far-Ching
authors.initials: FC
authors.lastname: Lin
authors.forename: Ke-Kung
authors.initials: KK
authors.lastname: Chen
mesh_terms: 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*
chemical_list: D001149:Arsenates; D002614:Chelating Agents; D002857:Chromium; C040890:chromated copper arsenate; D003300:Copper; D001151:Arsenic