Remediation of CCA-C treated wood using chelating agents
Remediation of CCA-C treated wood using chelating agents
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使用螯合剂修复 CCA-C 处理的木材
DOI：
10.1007/s00107-003-0412-7
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
C. Kose
中科院分区：
文献类型：
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作者：
S. Kartal;C. Kose
本研究评估了常见的螯合剂，乙二胺四乙酸（EDTA），次氮基三乙酸（NTA），草酸（OA）对去除铜，铬，砷从CCA-C处理木材的效果。在这项研究中，去除金属氧化物从处理芯片和木屑EDTA和NTA与OA结合在双提取过程中使用批式浸出实验进行了研究。暴露CCA-C处理的芯片和木屑螯合提取增强了CCA-C组分的去除相比，用去离子水提取。将CCA-C处理过的木屑研磨成40目锯末，可以更好地接触和去除CCA-C成分。EDTA/OA和NTA/OA在双萃取过程中去除约100%的铜和砷和90%的铬从CCA-C处理过的木屑。然而，CCA-C处理的碎片的双重提取导致约80%的铜和砷以及70%的铬去除。在单次提取过程中，EDTA和NTA从CCA-C处理的碎片和木屑中去除了大量的铜，与其他成分相比。
This study evaluates the effects of the common chelating agents, ethylenediaminetetracetic acid (EDTA), nitrilotriacetic acid (NTA), and oxalic acid (OA) on the removal of copper, chromium, and arsenic from CCA-C treated wood. In the study, the removal of the metal oxides from treated chips and sawdust by EDTA and NTA in conjunction with OA in dual extraction processes was investigated using batch-leaching experiments. Exposing CCA-C treated chips and sawdust to chelat extraction enhanced the removal of CCA-C components compared to extraction by deionized water. Grinding CCA-C treated wood chips into 40-mesh sawdust provided greater access to and removal of CCA-C components. Extraction with EDTA/OA and NTA/OA in dual extraction processes removed about 100% copper and arsenic and 90% chromium from CCA-C treated sawdust. However dual extraction of CCA-C treated chips resulted in about 80% copper and arsenic, and 70% chromium removal. In single extraction processes, EDTA and NTA removed significant amounts of copper from CCA-C treated chips and sawdust compared to other components.