A mini review on bioaccumulation of 210Po by marine organisms

210Po, a naturally occurring radioisotope, is known to be enriched by various kinds of marine organisms. It can, however, have a toxic effect and therefore play an important role in humans, as among the natural radioactivity in human foodstuff 210Po is the major contributor. Those seaweeds which are rich in protein can have a higher activity of 210Po as all species display a comparatively higher 210Po activity in muscles and storage organs than in their hard parts. 210Po concentrations may, however, vary according to the sampling site and geographical location. Moreover, literature surveys reveal that 210Po concentration in organisms can vary according to the species, their feeding habits, physiological processes, body size and seasonal changes. From the literature survey undertaken some conflict between the different research studies was found and it was also noted that some important aspects within the research were not well-documented and therefore comprehensive. This being the case, further research is essential.