期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 5, 期 5, 页码 4702-4706出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2017.09.001
关键词
Vanadium; Chromium; Recovery; Acidic leach solution
资金
- National Natural Science Foundation of China [51104186]
- Hunan Provincial Natural Science Foundation of China [2016JJ2142]
- Fundamental Research Funds for the Central Universities of Central South University [2016zzts282, 2016zzts283]
- Open-End Fund for the Valuable and Precision Instruments of Central South University [CSUZC201711]
The separation and recovery of vanadium and chromium from an acidic V-Cr-bearing reducing slag leach solution was investigated by selective oxidation of V(IV) using manganese dioxide, followed by precipitation of V (V) and Cr(III), respectively. The potential-pH diagrams for vanadium-manganese-water systems and chromium-manganese-water systems were drawn. E(MnO2/Mn2+) is higher than E(VO2+/VO2+) but lower than E (Cr2O72-/Cr3+), which proves manganese dioxide can be used to selectively oxidize V(IV). The oxidation of V (IV) can reach 99.5% at a temperature of 95 degrees C for a oxidation duration of 3 h with the addition of 40 g/L manganese dioxide, and Cr(III) cannot be oxidized. The V(V) in the oxidized solution was precipitated in the form of ammonium polyorthovanadate and Cr(III) was precipitated as chromic hydroxide. The overall recovery of vanadium and chromium from the acidic leach solution was 98.7% and 99.4%, respectively.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据