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Selective extraction of vanadium from the APV-precipitated waste water

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REWAS 2013

Abstract

In the process of precipitating ammonium polyvanadate (APV) to produce vanadium pentoxide in Pan-steel in China, rest waste water usually contains about 24~333mg/L V(V), 2~100g/L Cr(VI),20~500mg/L Si(IV) and 20~100g/L Na2SO4. In order to recover valuable and also toxic metal ions contained in the waste water, effective extraction method of using anion exchange resin was realized to extract Vanadium selectively, leading to effective separation between vanadium and chromium. To ensure vanadium was absorbed by the resin, V(V) and Cr(VI) were reduced to V(IV) and Cr(III) by NaHSO3, respectively, and then V(IV) was oxidized by H2O2 to V(V) anions. Effects of temperature, solution pH, concentration of ions and absorbing time on vanadium absorption rate were investigated. Chromium was precipitated from rest solution while vanadium was eluted from resin by NaOH solution and then precipitated. Results showed that vanadium recovery of 73% could be obtained in optimized condition. The resin could be regenerated by 3% hydrochloric acid, which indicated the recyclability of the resin and thus low cost of this established method.

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© 2013 TMS (The Minerals, Metals & Materials Society)

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Li, C., Li, HY., Tu, CB., Zhang, T., Fang, HX., Xie, B. (2013). Selective extraction of vanadium from the APV-precipitated waste water. In: Kvithyld, A., et al. REWAS 2013. Springer, Cham. https://doi.org/10.1007/978-3-319-48763-2_32

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