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Citation
Tags
HERO ID
1519020
Reference Type
Journal Article
Title
Factors affecting chelating extraction of Cr, Cu, and As from CCA-treated wood
Author(s)
Chang, F-C; Wang, Y-N; Chen, P-J; Ko, C-H
Year
2013
Is Peer Reviewed?
Yes
Journal
Journal of Environmental Management
ISSN:
0301-4797
EISSN:
1095-8630
Volume
122
Page Numbers
42-46
Language
English
PMID
23542569
DOI
10.1016/j.jenvman.2013.02.012
Web of Science Id
WOS:000319101900007
Abstract
The disposal of chromated copper arsenate (CCA)-treated waste wood is becoming a serious problem in many countries due to potential leaching of hazardous elements from in-service use in the environment or disposal of solutions after remediation; therefore, it is necessary to develop proper remediation techniques. The effects of concentration, extraction period, temperature, and sequential extraction on the extraction of Cr, Cu, and As from CCA-treated wood using [S,S]-ethylenediaminedisuccinic acid (EDDS), ethylenediaminetetraacetic acid (EDTA), and nitrilotriacetic acid (NTA) were studied. Mobility of metal in the samples was evaluated by using a sequential extraction scheme that could give the information needed to explain different extraction efficiencies for different metals. Results of long-term leaching tests of CCA-treated wood before and after EDDS extraction were used to evaluate Cr, Cu, and As leachability. Kinetic experiments showed that 6 h was the optimum extraction time for all metals and CCA-treated wood. Experimental results showed that EDDS is a very effective chelating agent for the extraction of Cr, Cu, and As from CCA-treated wood. Increased temperature significantly enhanced the extraction efficiency of CCA metals, especially Cr and As. The much better extractability of Cu compared to Cr and As by chelating agents can be attributed to the presence of larger weakly bound fractions. The CCA-treated woods after EDDS extraction have met the EPA's TCLP regulatory limit and could be classified as a non-hazardous waste according to identification standard of hazardous wastes.
Keywords
Chromated copper arsenate-treated wood; Chelating extraction; [S,S]-ethylenediaminedisuccinic acid; Biodegradability; Metal fractions; Long-term test
Tags
IRIS
•
Arsenic Hazard ID
ToxNet
Considered New
PubMed
Considered New
ToxNet
Excluded
Toxnet Duplicates
PubMed
WOS
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
ToxNet
Excluded
Toxnet Duplicates
2. Lit Search Updates through Oct 2015
PubMed
WOS
ToxNet
Considered
7. Other Studies through Oct 2015
Other
•
Arsenic (Inorganic)
1. Literature
Lit search updates through Oct 2015
3. Hazard ID Screening
Other potentially supporting studies
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