E3S Web Conf.
Volume 194, 20202020 5th International Conference on Advances in Energy and Environment Research (ICAEER 2020)
|Number of page(s)||4|
|Section||Environmental Protection and Pollution Control|
|Published online||15 October 2020|
Recovery of Cr(VI) from vanadium precipitated solution by precipitation with PbSO4
1 School of Metallurgy and Environment, Central South University, Changsha 410083, China
* Corresponding author: email@example.com
The recovery of Cr(VI) from vanadium precipitated solution obtained by adding Ca(OH)2 into chromium-containing vanadate solution and ball milling was investigated by precipitation with PbSO4. It was found that Cr can be effectively precipitated from the solution by PbSO4. The precipitate is mixture of PbSO4 and PbCrO4.PbO. The concentration of Cr remained in the solution decreases from 2.360 g/L to 0.002 g/L by adding PbSO4 into vanadium precipitated solution according to PbSO4/Cr molar ratio 3.0 under pH 11.5 and stirring for 120 min at 30 °C. After filtration, the precipitates were leached in H2SO4-Na2SO4 system solution to obtain Na2Cr2O7 solution and the filtrate can be reused to leach the precipitate contain PbSO4 and PbCrO4.PbO.
© The Authors, published by EDP Sciences, 2020
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