The recovery of metals from tailing ponds or dumps is a priority as they remained stored on large areas around the mining operations and represent an aggressive pollution source of natural water bodies. The paper objective is to develop a combined process for iron-containing mine tailings capitalization associates the benefits of magnetic separation to reduce the iron content, microwave digestion for metals forms solubilization from solid matrix and microemulsion for their extraction, concentration, and recycling from the digested sample. The magnetic separation of ferromagnetic fraction, with over 50 % iron, leads to an improved extraction efficiency. The optimum digestion procedure uses aqua regia, hydrogen peroxide (30 % H₂O₂) and microwaves. The microemulsion extraction using Brij 30 (polyoxyethylene (4) lauryl ether) as surfactant, ethyl acetate:butyl acetate (1:1, v/v) as oil phase and acidic metal solutions as aqueous phase, and also NaSCN (0.1 M) as carrier agent, performed at room temperature and atmospheric pressure, reveals that excellent recovery performance for iron (98.3 %), lead (98.5 %), zinc (93.0 %) can be obtained. In addition, copper (63.0 %) is recovered quite efficiently. The maximum microemulsion loading capacity in terms of mass of total metal ions/L was 351 mg/L and was achieved by two successive extractions. It has been demonstrated that by two successive extractions, the loading capacity is mainly represented by iron content. The results obtained demonstrate that the three combined procedures involving magnetic separation, microwave digestion and microemulsion assisted extraction ccontributes to the reduction of mine waste deposits and, consequently, the environmental pollution with heavy metals.

从尾矿池或垃圾场中回收金属是当务之急，因为它们仍然储存在采矿作业周围的大片区域，并且是天然水体的严重污染源。本文的目标是开发一种含铁尾矿资本化的联合工艺，结合磁选的好处来降低铁含量，金属的微波消解从固体基质中形成溶解，微乳液从消解中提取、浓缩和回收。样品。铁磁性部分的磁性分离，铁含量超过 50%，提高了提取效率。最佳消解程序使用王水、过氧化氢（30 % H ₂ O ₂) 和微波炉。以Brij 30（聚氧乙烯（4）月桂基醚）为表面活性剂，乙酸乙酯：乙酸丁酯（1：1，v/v）为油相，酸性金属溶液为水相，NaSCN（0.1 M）为微乳液萃取载体剂，在室温和大气压下进行，表明可以获得优异的铁（98.3%）、铅（98.5%）、锌（93.0%）的回收性能。此外，铜 (63.0%) 的回收效率很高。以总金属离子质量/升计的最大微乳液负载能力为 351 毫克/升，通过两次连续萃取实现。已经证明，通过两次连续提取，负载能力主要由铁含量表示。获得的结果表明，涉及磁分离的三个组合程序，