Radiotoxicity via intake of marine organisms: exposure and risk assessment in South Indians

Naturally occurring 210Po and anthropogenic 137Cs were determined in edible marine organisms consumed by humans along the southeast coast of India, where a mega nuclear power station is situated. The edible molluscan species showed elevated 210Po activity compared to crustaceans and fish. However, 137Cs was detected only in fish. The radiotoxicity due to 210Po was evaluated by calculating the effective dose and carcinogenic risk to humans consuming these species. The results revealed that 210Po contributed 99% to the dose as opposed to 137Cs and the estimated risk exerted no significant health hazard to humans. Data generated may help in assessing any future contamination.