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http://dx.doi.org/10.7844/kirr.2011.20.5.058

Recovery of EDTA from Waste Fluid of Archeological Waterlogged Wood Conservation Treatment  

Yang, Seok-Jin (Department of Chemical Engineering, Changwon National University)
Song, Ju-Yeong (Department of Chemical Engineering, Changwon National University)
Kim, Jong-Hwa (Department of Chemical Engineering, Changwon National University)
Publication Information
Resources Recycling / v.20, no.5, 2011 , pp. 58-63 More about this Journal
Abstract
pH control-precipitation method is used for recovery of EDTA from waste fluid of archeological waterlogged wood conservation treatment. EDTA has been used for eliminating of blacken effect in archeological waterlogged wood which was buried in the ground for long period of time. The black substance is generated by Fe$^{3+}$ in the soil reacted with tannin in the archeological waterlogged wood. In order to remove the black substance in archeological waterlogged wood, EDTA was used. The black substance is eliminated from wood as Fe-EDTA complex are formed, and EDTA is separated and precipitated from Fe-EDTA complexes at pH 2.68 or less. The result of analysis of the precipitated products and the commercial EDTA by FT-IR and FE-SEM showed that precipitated product by pH adjusted was not a type of Fe-EDTA complex, but pure EDTA. In this study, Fe$^{3+}$ from waste fluid of EDTA can be separated by HCl added. EDTA can be recycled by using the method of precipitation of EDTA in a strong acid.
Keywords
EDTA recovery; Fe extraction; Archeological waterlogged wood; Conservation treatment; Blacken effect;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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