Studies on EDTA Recycling via Formation of EDTA Iron(III) Sodium Salt

Li Wang; Di Weng; Jun Bo Wang; Xue Song Chen; Xiao Lu Xu

doi:10.4028/www.scientific.net/AMR.396-398.1707

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 396-398Studies on EDTA Recycling via Formation of EDTA...

Studies on EDTA Recycling via Formation of EDTA Iron(III) Sodium Salt

Abstract:

So far the absorption of NO by Fe^IIEDTA solution has not been put into commercial application due to its high cost. In this paper recycling EDTA via formation of EDTA iron (III) sodium salt was presented for the purpose of offering a new pathway to solve this issue. The invalid solution was fully oxidized after NO absorption by Fe^IIEDTA solution. Ion chromatogram were used to detect the remained ions in solution. It was found that the original ions such as SO₃^2-, NO₂^- and so on were all oxidized to SO₄^2- and NO₃^-. Solubility measurement was carried out and it was revealed that the separation and purification could be performed by decreasing the temperature to 306 K. Fourier transformation infrared spectrophotometer (FTIR) and X-ray diffractometer (XRD) were applied to determine the transformation product of EDTA. The results indicated that FeNaEDTA was formed. Inductively coupled plasma and atomic absorption spectroscopy (ICP-AAS) demonstrated that the practical solubility of FeNaEDTA reached 78.7% at pH 7.

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Periodical:

Advanced Materials Research (Volumes 396-398)

Pages:

1707-1710

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.396-398.1707

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Online since:

November 2011

Authors:

Li Wang, Di Weng, Jun Bo Wang, Xue Song Chen, Xiao Lu Xu

Keywords:

Absorption, EDTA Recycling, EDTA Sodium Iron Salt

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