Recovery of Molybdenum, Chromium, Tungsten, Copper, Silver, and Zinc from Industrial Waste Waters Using Zero-Valent Iron and Tailored Beneficiation Processes

Daniel Vollprecht, Katharina Plessl, Simone Franziska Neuhold, Friedrich Kittinger, Wolfgang Öfner, Peter Müller, Robert Mischitz, Klaus Philipp Sedlazeck

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

4 Zitate (Scopus)


Zero-valent iron (ZVI) has been used for water treatment for more than 160 years. However, passivation of its surface often constituted a problem which could only be tackled recently by the innovative Ferrodecont process using a fluidized bed reactor. In this study, pilot scale experiments for the removal of Mo, Cr, W, Cu, Ag and Zn from two industrial waste water samples and lab-scale experiments for the beneficiation of the abrasion products are presented to integrate the Ferrodecont process into a complete recycling process chain. Firstly, 38.5 % of Cu was removed from sample A, yielding abrasion products containing 33.1 wt% Cu as metallic copper (Cu) and various Cu compounds. The treatment of sample B removed 99.8 % of Mo, yielding abrasion products containing 17.8 wt% of Mo as amorphous phases or adsorbed species. Thermal treatment (1300 °C) of the abrasion product A indicated a reduction of delafossite to metallic Cu according to differential scanning calorimetry (DSC), thermogravimetry (TG) and X-ray diffraction (XRD), which was successfully separated from the magnetic iron phases. Hydrometallurgical treatment (1.5 M NaOH, 3 d, liquid:solid ratio (L:S) = 15:1) of sample B yielded aqueous extracts with Mo concentrations of 5820 to 6300 mgL-1. In conclusion, this corresponds to an up to 53-fold enrichment of Mo during the entire process chain.

FachzeitschriftProcesses : open access journal
PublikationsstatusElektronische Veröffentlichung vor Drucklegung. - 28 Feb. 2020

Bibliographische Notiz

Funding Information:
Author Contributions: Conceptualization, D.V., P.M., R.M. and K.P.S.; methodology, D.V., P.M., R.M., F.K., W.Ö., K.P.S..; investigation, K.P., P.M., R.M., F.K., W.Ö. and K.P.S.; resources, P.M., R.M., F.K., W.Ö., K.P.S..; writing—original draft preparation, D.V., K.P.S..; writing—review and editing, D.V., S.N., P.M., R.M.; F.K., W.Ö., K.P.S.; visualization, K.P.S., S.N.; supervision, D.V., K.P.S.; project administration, K.P.S.; funding acquisition, D.V. All authors have read and agreed to the published version of the manuscript.” Funding: The project RECOMET 2.0 was funded by the Austrian Research Promotion Agency, grant number 853481.

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© 2020 by the authors.

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