Cadmium as a chief pollutant in aqueous environment poses a potential threat to human health. It causes serious metal toxic effects and accumulation throughout the food chain. As a result, the systemic body is subjected to the corporate risk of genetical malfunction. The culprits are no doubt the effluents from industries like smelting, dyeing, mining etc. In an attempt to get rid of the cadmium contamination problems, many researchers have tried their best to prove that the biosorption is a feasible and potential technique for cadmium heavy metal decontamination making use of panacea, the green algae, which is the centre point of this study. The purpose of this article is to review how best the green algae be put into use as biosorbent for the complete obliteration of cadmium metal ion from aqueous phase. The various constraints and operational conditions of biosorption processes have been elaborately dealt with.