(2018) Environmental Research_A critical review of ferrate(VI)-based remediation of soil and groundwater

Rai P.K., Lee J., Kailasa S.K., Kwon E.E., Tsang Y.F., Ok Y.S., Kim K.-H.

(Academic Press Inc.) Environmental Research ISSN: 139351 Vol.160 Issue. Article No. DOI: 10.1016/j.envres.2017.10.016

Over the past few decades, diverse chemicals and materials such as mono- and bimetallic nanoparticles, metal oxides, and zeolites have been used for soil and groundwater remediation. Ferrate (FeVIO₄^2-) has been widely employed due to its high-valent iron (VI) oxo compound with high oxidation/reduction potentials. Ferrate has received attention for wide environmental applications including water purification and sewage sludge treatment. Ferrate provides great potential for diverse environmental applications without any environmental problems. Therefore, this paper provides comprehensive information on the recent progress on the use of (FeVIO₄^2-) as a green material for use in sustainable treatment processes, especially for soil and water remediation. We reviewed diverse synthesis recipes for ferrates (FeVIO₄^2-) and their associated physicochemical properties as oxidants, coagulants, and disinfectants for the elimination of a diverse range of chemical and biological species from water/wastewater samples. A summary of the eco-sustainable performance of ferrate(VI) in water remediation is also provided and the future of ferrate(VI) is discussed in this review. © 2017 Elsevier Inc.

This study was supported by a grant from the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2016R1E1A1A01940995 ). This work was also carried out with the support of " Cooperative Research Program for Agriculture Science and Technology Development (Project no. PJ012521032017 )" Rural Development Administration, Republic of Korea. P.K.R. thanks the Ministry of Environment, Forest and Climate Change, India as well as the Department of Biotechnology (DBT), Ministry of Science and Technology for a DBT North East Associateship, 2017. We thank all the editor/editor in chief and all the anonymous reviewers for valuable suggestions to upgrade our manuscript.