81-82Transport and fixation of radionuclides by silt and seaweeds in the coastal environment of Tarapur Atomic Power Station, Bombay, India are described. The fixation processes play a significant part in decontamination of coastal seawater to which radioactive wastes are released. Accumulation of radionuclides by the sediment and seaweeds detoxicates the seawater with respect to radiocontaminants