Selective recovery of vanadium as AMV from calcium vanadate sludge by direct AS leaching process: An industrial approach.

Author(s) Muthukumar, K.; Patel, K.M.; Mohapatra, D.; Padh, B.; Reddy, R.
Journal Waste Manag
Date Published 2020 Feb 01
Abstract

Generation of calcium vanadate waste sludge their management and treatment.is one of the major problem of metal processing industry. In this paper, we have proposed a simple process for the selective recovery of vanadium as ammonium metavanadate (AMV) from the calcium vanadate sludge using ammonium sulphate (AS) as a leaching agent. Under the optimum leaching condition (pH-7.5, temperature-80 °C, time-1 h, AS reagent-0.5 M) it is possible to leach out 82% of V values from the calcium vanadate sludge. The overall recovery of V is 81% with 98.5% AMV product purity. The AMV product quality from AS leach process has been compared with conventional HSO leach process. The proposed process has major advantages such as, better economic benefits, less chemical consumption, minimum effluent recycling and less waste generation.

DOI 10.1016/j.wasman.2019.11.040
Keywords Ammonium Sulfate; Calcium; Industrial Waste; Sewage; Vanadates; Vanadium
ISSN 1879-2456
Citation Muthukumar K, Patel KM, Mohapatra D, Padh B, B Reddy R. Selective recovery of vanadium as AMV from calcium vanadate sludge by direct AS leaching process: An industrial approach. Waste Manag. 2020;102:815-822.

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