“…Moreover, various valuable metal elements, such as lithium, nickel, cobalt, and copper, are contained in these waste streams [2,3]. As one of the most valuable metals, nickel is widely used in numerous industrial applications due to its catalytic, electronic, and anticorrosion properties [4,5]. Nickel recovery from industrial hydrometallurgical process streams, electrowinning side streams, urban mining, and other waste sources is important not only from an economical point of view, but also in terms of the future sustainability of finite resources.…”