“…Various treatment methods including precipitation [3,4], ion exchange by ionic resins [5], clays [6] or zeolites [7], adsorption of cadmium on the surface of materials such as carbon [8] or alumina [9] and biofiltration by microalgal [10] or bacteria [11] have been proposed for removal of cadmium from wastewaters. However, each of these processes has its own restrictions and disadvantages.…”