The transport

accumulation and distribution of 141 Ce in a simulated paddy were studied.The results show that when entering water

141 Ce will be transferred to soil and rice

and the 141 Ce concentration in water will decrease rapidly.The 141 Ce concentration in rice is higher than that in soil and water.The dynamic change of the 141 Ce concentration in the water and soil are decreased monotonously with time

and that in rice is increased to a maximum value then decreased

141 Ce is puickly adsorbed by soil and the adsorption rate is higher.More than 95% of 141 Ce is detainde in 4 cm of soil surface.The 141 Ce concentration in soil presents an individual exponential declining with depth of soil.