Recovery of Cr(VI) from vanadium precipitated solution by precipitation with PbSO4 Yang Minge, Yang Haoxiang, Tian Shenghui, Hu bin, Chang Changda, Wang Mingyu and Wang Xuewen E3S Web Conf., 194 (2020) 04051 Published online: 15 October 2020 DOI: 10.1051/e3sconf/202019404051