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4 December 2019

Metallic iron for environmental remediation: prospects and limitations.

Abstract

Metallic iron (Fe0) has been suggested as an affordable, readily available and efficient material for environmental remediation. Mixed into soil or filled in reactive barriers, Fe0 is a feasible pathway to control contamination in seepage waters. Available information in the literature, however, presents discrepant evidence on the efficiency of this (still innovative) technology. On the basis of a profound study of literature over the past 160 years, it is suggested that these discrepancies are explained by the aqueous chemistry of iron (corrosion). Neglected aspects contributing to the apparent complexity of the Fe0/H2O system are outlined. It appears that designing an efficient and sustainable Fe0 remediation system is purely a site-specific issue and that available data are not (really) comparable. In particular, it is clear that Fe0 barriers that have been successfully working for more than a decade were not designed according to any scientific basis. While the success or failure of implemented reactive barriers can be rationalized, more systematic research is needed for a science-based design of efficient and sustainable Fe0-based systems for environmental remediation.

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Published In

Pages: 531 - 544
Editor: J. P. F. D'Mello [email protected], Angewandte Geologie Universität Göttingen Goldschmidstrasse 3 D-37077 Göttingen Germany
ISBN (ePDF): 978-1-78639-468-2
ISBN (ePub): 978-1-78639-469-9
ISBN (Hardback): 978-1-78639-467-5

History

Published online: 4 December 2019
Cover date: 2020

Language

English

Authors

Affiliations

C. Noubactep [email protected]
Angewandte Geologie Universität Göttingen Goldschmidstrasse 3 D-37077 Göttingen Germany

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