Sequential extraction of chromium, molybdenum, and vanadium in basic oxygen furnace slags

Sequential extraction of chromium, molybdenum, and vanadium in basic oxygen furnace slags Basic oxygen furnace slags (BOS) are by-products of basic oxygen steel production. Whereas the solubility of some elements from these slags has been well investigated, information about the mineralogy and related leaching, i.e., availability of the environmentally relevant elements chromium (Cr), molybdenum (Mo), and vanadium (V), is still lacking. The aim of this study was to investigate these issues with a modified, four-fraction-based, sequential extraction procedure (F1–F4), combined with X- ray diffraction, of two BOS. Extractants with increasing strength were used (F1 demineralized water, F2 CH COOH + HCl, F3 Na EDTA + NH OH·HCl, and F4 HF + HNO +H O ), and after each fraction, X-ray diffraction was performed. The recovery 2 2 3 2 2 of Cr was moderate (66.5%) for one BOS, but significantly better (100.2%) for the other one. High recoveries were achieved for the other elements (Mo, 100.8–107.9% and V, 112.6–87.0%), indicating that the sequential extraction procedure was reliable when adapted to BOS. The results showed that Cr and Mo primarily occurred in F4, representing rather immobile elements under natural conditions, which were strongly bound into/onto Fe minerals (srebrodolskite, magnetite, hematite, or wustite). In contrast, V was more mobile with proportional higher findings http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Science and Pollution Research Springer Journals

Sequential extraction of chromium, molybdenum, and vanadium in basic oxygen furnace slags

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Environment; Environment, general; Environmental Chemistry; Ecotoxicology; Environmental Health; Atmospheric Protection/Air Quality Control/Air Pollution; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
ISSN
0944-1344
eISSN
1614-7499
D.O.I.
10.1007/s11356-018-2361-z
Publisher site
See Article on Publisher Site

Abstract

Basic oxygen furnace slags (BOS) are by-products of basic oxygen steel production. Whereas the solubility of some elements from these slags has been well investigated, information about the mineralogy and related leaching, i.e., availability of the environmentally relevant elements chromium (Cr), molybdenum (Mo), and vanadium (V), is still lacking. The aim of this study was to investigate these issues with a modified, four-fraction-based, sequential extraction procedure (F1–F4), combined with X- ray diffraction, of two BOS. Extractants with increasing strength were used (F1 demineralized water, F2 CH COOH + HCl, F3 Na EDTA + NH OH·HCl, and F4 HF + HNO +H O ), and after each fraction, X-ray diffraction was performed. The recovery 2 2 3 2 2 of Cr was moderate (66.5%) for one BOS, but significantly better (100.2%) for the other one. High recoveries were achieved for the other elements (Mo, 100.8–107.9% and V, 112.6–87.0%), indicating that the sequential extraction procedure was reliable when adapted to BOS. The results showed that Cr and Mo primarily occurred in F4, representing rather immobile elements under natural conditions, which were strongly bound into/onto Fe minerals (srebrodolskite, magnetite, hematite, or wustite). In contrast, V was more mobile with proportional higher findings

Journal

Environmental Science and Pollution ResearchSpringer Journals

Published: Jun 2, 2018

References

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