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With rapid growth of industries and other anthropogenic activities, chances of direct or indirect contamination of soil, water and air by metallic wastes are increasing day-by-day (Sivakami et al., 2015). Most of these heavy metals, such as, arsenic, lead, chromium, cadmium, mercury, selenium, etc. are toxic, carcinogenic and mutagenic in nature even at low concentration. Being highly potent environmental pollutants, their removal from the medium becomes a necessity for well- being of the biotic components of the environment (Singh et al., 2020). Different physical, chemical and biological methods adopted for removal of heavy metals from the medium have been reported (Yadav et al., 2018). Among them, biological method using cyanobacterium have been widely studied. Cyanobacterium and other algal cells have been reported to be helpful in removal of heavy metals via biosorption, bioaccumulation and biotransformation (Jyoti Priya et al., 2019; Chen et al., 2023).