TY - JOUR
T1 - XAS study of chromium recoverable from plating sludge
AU - Wei, Yu Ling
AU - Hsu, Lee How
AU - Paul Wang, H.
AU - Chen, Kai Wen
N1 - Funding Information:
We thank Professor Jyh-Fu Lee and the staff of NSRRC of Taiwan for their assistance during the XAS experimentation. Miss Hsiang-Lin Chou is appreciated for her Graphing works. This project was sponsored by the National Science Council of Taiwan, ROC (NSC 91-2211-E-029-007).
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2007/5
Y1 - 2007/5
N2 - Because global natural metal resources are depleting, this study aim to examine the chemical feasibility of recovering chromium as Cr(VI) from a Cr(OH)3-containing plating sludge through a co-heating procedure of the plating sludge with a incinerator fly ash that is rich in calcium hydroxide. The critical step in the process of recovering Cr from plating sludge would be to convert the water-insoluble Cr(OH)3 into water-soluble Cr(VI). Results from Cr K-edge X-ray absorption near edge spectrum (XANES) suggest that majority of the Cr is in the form of CaCrO4 after the co-heating procedure of plating sludge and the incinerator fly ash at different temperatures. Heating the mixture of the plating sludge and the incinerator fly ash results in an oxidation of Cr(OH)3 that is basically water insoluble to Cr(VI) which is water soluble, consequently more Cr(VI) can be extracted with water and recovered from the heated mixture than from the non-heated plating sludge.
AB - Because global natural metal resources are depleting, this study aim to examine the chemical feasibility of recovering chromium as Cr(VI) from a Cr(OH)3-containing plating sludge through a co-heating procedure of the plating sludge with a incinerator fly ash that is rich in calcium hydroxide. The critical step in the process of recovering Cr from plating sludge would be to convert the water-insoluble Cr(OH)3 into water-soluble Cr(VI). Results from Cr K-edge X-ray absorption near edge spectrum (XANES) suggest that majority of the Cr is in the form of CaCrO4 after the co-heating procedure of plating sludge and the incinerator fly ash at different temperatures. Heating the mixture of the plating sludge and the incinerator fly ash results in an oxidation of Cr(OH)3 that is basically water insoluble to Cr(VI) which is water soluble, consequently more Cr(VI) can be extracted with water and recovered from the heated mixture than from the non-heated plating sludge.
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U2 - 10.1016/j.elspec.2006.12.060
DO - 10.1016/j.elspec.2006.12.060
M3 - Article
AN - SCOPUS:34247147544
SN - 0368-2048
VL - 156-158
SP - 204
EP - 207
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
ER -