Probing the structural role of Cr in stabilized tannery wastes with X-ray absorption fine structure spectroscopy.
Cr(VI) removal
Tannery sludge
Vitrification
Waste treatment
XAFS
Journal
Journal of hazardous materials
ISSN: 1873-3336
Titre abrégé: J Hazard Mater
Pays: Netherlands
ID NLM: 9422688
Informations de publication
Date de publication:
15 01 2021
15 01 2021
Historique:
received:
23
06
2020
revised:
12
08
2020
accepted:
13
08
2020
entrez:
1
12
2020
pubmed:
2
12
2020
medline:
2
12
2020
Statut:
ppublish
Résumé
The effective stabilization of tannery sludge wastes is explored using X-Ray Absorption Fine Structure (XAFS) spectroscopies. Solidification of the Cr-rich waste was realized via vitrification of the incinerated sludge with silica and flux agents. It is demonstrated that the effective reduction of Cr(VI) and the structural role of Cr are strongly modulated by the chemical composition of the waste. Eskolaite microcrystallites are embedded in the silica matrix of all vitrified samples and the extent of microcrystalline formation is strongly related to the glass basicity. Both Cr(VI) and Cr(III) species are identified, corresponding to Cr(VI)O
Identifiants
pubmed: 33254765
pii: S0304-3894(20)31720-9
doi: 10.1016/j.jhazmat.2020.123734
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
123734Informations de copyright
Copyright © 2020 Elsevier B.V. All rights reserved.