LAPSE:2020.0424
Published Article
LAPSE:2020.0424
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 Neuhold, Fritz Kittinger, Wolfgang Öfner, Peter Müller, Robert Mischitz, Klaus Philipp Sedlazeck
May 8, 2020
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.
Keywords
critical metal removal, Ferrodecont process, hydrometallurgy, industrial waste water, thermal treatment, zero-valent iron
Suggested Citation
Vollprecht D, Plessl K, Neuhold S, Kittinger F, Öfner W, Müller P, Mischitz R, Sedlazeck KP. Recovery of Molybdenum, Chromium, Tungsten, Copper, Silver, and Zinc from Industrial Waste Waters Using Zero-Valent Iron and Tailored Beneficiation Processes. (2020). LAPSE:2020.0424
Author Affiliations
Vollprecht D: Montanuniversität Leoben, Franz-Josef-Straße 18, 8700 Leoben, Austria [ORCID]
Plessl K: Montanuniversität Leoben, Franz-Josef-Straße 18, 8700 Leoben, Austria
Neuhold S: Montanuniversität Leoben, Franz-Josef-Straße 18, 8700 Leoben, Austria [ORCID]
Kittinger F: Montanuniversität Leoben, Franz-Josef-Straße 18, 8700 Leoben, Austria
Öfner W: Montanuniversität Leoben, Franz-Josef-Straße 18, 8700 Leoben, Austria
Müller P: ferroDECONT GmbH, Peter-Tunner-Str. 19, 8700 Leoben, Austria
Mischitz R: ferroDECONT GmbH, Peter-Tunner-Str. 19, 8700 Leoben, Austria
Sedlazeck KP: Montanuniversität Leoben, Franz-Josef-Straße 18, 8700 Leoben, Austria
Journal Name
Processes
Volume
8
Issue
3
Article Number
E279
Year
2020
Publication Date
2020-02-28
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr8030279, Publication Type: Journal Article
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LAPSE:2020.0424
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doi:10.3390/pr8030279
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May 8, 2020
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May 8, 2020
 
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Calvin Tsay
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