High-manganese containing vanadium wastewater (HMVW) is commonly produced during the vanadium extraction process from vanadium titano-magnetite. HMVW cannot be reused and discharged directly, and is harmful to the environment and affect product quality due to heavy metals in the wastewater. The wastewater is usually treated by lime neutralization, but valuable metals (especially V and Mn) cannot be recovered. In this study, an efficient and environmentally friendly method was developed to recover valuable metals by using a solvent extraction-precipitation process. In the solvent extraction process, 98.15% of vanadium was recovered, and the V₂O₅ product, with a purity of 98.60%, was obtained under optimal conditions. For the precipitation process, 91.05% of manganese was recovered as MnCO₃ which meets the III grade standard of HG/T 2836-2011. Thermodynamic simulation analysis indicated that MnCO₃ was selectively precipitated at pH 6.5 while Mg and Ca could hardly be precipitated. The results of X-ray diffraction and scanning electron microscopy demonstrated that the obtained V₂O₅ and MnCO₃ displayed a good degree of crystallinity. The treated wastewater can be returned for leaching, and resources (V and Mn) in the wastewater were utilized efficiently in an environmentally friendly way. Therefore, this study provides a novel method for the coextraction of V and Mn from HMVW.

高钒含量的钒废水（HMVW）通常是在钒钛磁铁矿的钒提取过程中产生的。HMVW不能直接重复使用和排放，并且由于废水中的重金属而对环境有害并影响产品质量。废水通常通过石灰中和处理，但是无法回收有价值的金属（尤其是V和Mn）。在这项研究中，开发了一种有效且环保的方法，通过使用溶剂萃取-沉淀工艺来回收有价值的金属。在溶剂萃取过程中，回收了98.15％的钒，并回收了V ₂ O ₅在最佳条件下获得纯度为98.60％的产物。在沉淀过程中，回收了91.05％的锰作为MnCO ₃，符合HG / T 2836-2011的III级标准。热力学模拟分析表明，MnCO ₃在pH 6.5时选择性沉淀，而Mg和Ca几乎不沉淀。X射线衍射和扫描电子显微镜的结果表明，得到的V ₂ O ₅和MnCO ₃显示出良好的结晶度。经过处理的废水可以返回进行淋洗，废水中的资源（V和Mn）以环保的方式得到有效利用。因此，这项研究提供了一种从HMVW中共萃取V和Mn的新方法。