Spectroscopic Investigations of the Oxidative Polymerization of Hydroquinone in the Presence of Hexavalent Chromium
Joint Authors
Cheng, Ching-Yun
Chan, Ya-Ting
Tzou, Yu-Min
Chen, Kai-Yue
Liu, Yu-Ting
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-08-22
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Polyphenol polymerization receives much scientific attentions because it is an important reaction of humification processes.
Through an oxidative polymerization reaction (OPR), hydroquinone (H2Q), a naturally occurring compound, has been found to be a vital precursor of humic substances in soils.
Chromate (Cr(VI)), a strong oxidant, is widely distributed in the environment due to the inappropriate disposal of Cr-containing wastes.
The OPR of H2Q in the presence of Cr(VI) may occur naturally.
In the study, it was found that 400 mg L−1 H2Q could be polymerized at pH 3.0 with 105 mg L−1 Cr(VI).
The results of FT-IR revealed the presence of both hydroquinone and benzoquinone nuclei in the polymer.
The spectra of X-ray absorption near edge structure (XANES) demonstrated a decrease in Cr(VI) content during the OPR of H2Q.
Based on the results of linear combination fitting (LCF) for the spectra of XANES, the proportions of Cr species in the precipitates mainly consisted of Cr(OH)3, and Cr-carboxylate contents increased gradually from 15.3 to 25.5% over the reaction time.
After acidizing the supernatants at pH 1.0 for 1 d, Cr(III)-HA dominated Cr(III) species.
This suggested that humic-like substances were formed during OPR of H2Q, possibly through the formation of Cr(III)-organic complex.
American Psychological Association (APA)
Cheng, Ching-Yun& Chan, Ya-Ting& Tzou, Yu-Min& Chen, Kai-Yue& Liu, Yu-Ting. 2016. Spectroscopic Investigations of the Oxidative Polymerization of Hydroquinone in the Presence of Hexavalent Chromium. Journal of Spectroscopy،Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1110803
Modern Language Association (MLA)
Cheng, Ching-Yun…[et al.]. Spectroscopic Investigations of the Oxidative Polymerization of Hydroquinone in the Presence of Hexavalent Chromium. Journal of Spectroscopy No. 2016 (2016), pp.1-8.
https://search.emarefa.net/detail/BIM-1110803
American Medical Association (AMA)
Cheng, Ching-Yun& Chan, Ya-Ting& Tzou, Yu-Min& Chen, Kai-Yue& Liu, Yu-Ting. Spectroscopic Investigations of the Oxidative Polymerization of Hydroquinone in the Presence of Hexavalent Chromium. Journal of Spectroscopy. 2016. Vol. 2016, no. 2016, pp.1-8.
https://search.emarefa.net/detail/BIM-1110803
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1110803