Atmospheric acid leaching has attracted great attention from scientists due to the mild leaching conditions. However, the leaching efficiency of nickel is lower than that using high pressure acid leaching. Herein, we report the use of a surfactant (e.g., stearyltrimethyl ammonium chloride, STAC) to improve the leaching efficiency of Ni. The effects of surfactant type, ore-surfactant ratio, leaching temperature, and leaching duration on the leaching ratio of Ni were investigated. The use of STAC resulted in the high efficiency for Ni leaching at 100 °C with an ore-surfactant ratio of 15 and leaching duration of 8 h. The leaching efficiencies of Ni and Co were significantly higher than that of atmospheric acid leaching. The surface tension and viscosity of the leaching solution, and the zeta potential of the leached residue were analyzed to investigate the mechanism of the leaching process. The changes of interfacial properties improved ionic diffusion and decreased metal adsorption, which further lead to the increasing of leaching efficiency.

由于温和的浸提条件，大气酸浸提法引起了科学家的极大关注。但是，镍的浸出效率低于高压酸浸。本文中，我们报道了使用表面活性剂（例如，硬脂基三甲基氯化铵，STAC）来提高Ni的浸出效率。研究了表面活性剂类型，表面活性剂比，浸出温度和浸出时间对Ni浸出率的影响。使用STAC可以在100°C的条件下实现高效的镍浸出，矿石表面活性剂比率为15，浸出持续时间为8 h。Ni和Co的浸出效率显着高于大气酸浸。浸出液的表面张力和粘度，并对浸出残渣的ζ电位进行了分析，以研究浸出过程的机理。界面性质的变化改善了离子扩散并降低了金属吸附，这进一步导致了浸出效率的提高。