Transference, concentration and distribution of ⁹⁵Zr among seawater, sediment and marine organisms

In simulated marine environment,the specific activity of ⁹⁵Zr in water decreased rapidly in the former period of the exper iment.In the first 4 h of the experiment,the concentration of ⁹⁵Zr in water decreased more than 90% of the original value,and then slowly declined.The specific activity of ⁹⁵Zr in sediment appeared in increasing tendency in the former period of the experiment,reached concentrating peak at 2d and decreased afterwards.Shell of Narssarius semiplicatus has much stronger capability on concentrating ⁹⁵Zr than muscle.The concentration factors of shell and muscle are 10.32 and 4.68,respectively.According to the concentrated quantity,viscer a has the strongest capability on concentrating ⁹⁵Zr among the study tissues/or gans in Boleop hthalmus pectinirostris,and the followings are gill and fin.Muscle of the fish is the organ that has the weakest capability on concentrating ⁹⁵Zr,and the following is vertebra.Exceptgill,the concentration factors of the other organs in Boleophthalmus pectinirostris are all smaller than 1.Narssarius semiplicatus has much stronger capability on concentrating ⁹⁵Zr than Boleophthalmus pectinirostris.