Ruichi Zhang, Ingar Walder, Tiina Leiviskä, Pilot-scale field study for vanadium removal from mining-influenced waters using an iron-based sorbent, Journal of Hazardous Materials, Volume 416, 2021, 125961, ISSN 0304-3894, https://doi.org/10.1016/j.jhazmat.2021.125961
Pilot-scale field study for vanadium removal from mining-influenced waters using an iron-based sorbent
|Author:||Zhang, Ruichi1; Walder, Ingar2; Leiviskä, Tiina1|
1Chemical Process Engineering, University of Oulu, P.O. Box 4300, FIN-90014 Oulu, Finland
2Kjeøy Research & Education Center, Vestbygd, Norway
|Online Access:||PDF Full Text (PDF, 6.5 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2021051429845
|Publish Date:|| 2021-05-14
This study investigated the removal of vanadium from mining waters at a closed mine site (Mustavaara, Finland) using granular ferric oxyhydroxide (CFH-12) on pilot scale. Two filter systems, pilot A and pilot B, were placed in different streams, where the influent in pilot A contained a higher and very variable vanadium concentration (6.46–99.1 mg/L), while the pilot B treated influent had lower vanadium concentrations (0.443–2.33 mg/L). The operation periods were 51 days for pilot A and 127 days for pilot B. Water quality analyses revealed that vanadium was efficiently captured in the filter system in both pilots. X-ray fluorescence analysis revealed that the filter beds were not fully saturated with vanadium. X-ray photoelectron spectroscopy confirmed that oxidised vanadium (5⁺) existed in the used CFH-12 and the carbon content in the used material had increased due to the adsorbed organic compounds. For comparison, lab-scale coagulation experiments were conducted using ferric sulphate for the influent of pilot A (the sampled batch contained 15.9 mg/L V). The optimum coagulant dosage was 350 mg/L (> 93% vanadium removal) at the original pH (7.8–7.9) of the influent, whereas the required coagulant amount decreased when the influent pH was adjusted to 4.6–4.8.
Journal of hazardous materials
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
218 Environmental engineering
This study was funded by the VanProd project “Innovation for enhanced production of vanadium from waste streams in the Nordic Region”. The authors express their sincere thanks for the ﬁnancial support from the European Union programme Interreg Nord 2014-2020 and the Regional Council of Lapland (Finland). The authors also gratefully acknowledge the support from Maa-ja vesitekniikan tuki ry (Finland). A special thanks goes to Heini Postila at the Water, Energy and Environmental Engineering research units of the University of Oulu for providing the filter equipment.
© 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).