95Zr在海水、底质及海洋生物间的迁移、富集和分布
Transference, concentration and distribution of 95Zr among seawater, sediment and marine organisms
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摘要: 在模拟海洋环境中,海水中95Zr的比活度在试验前期快速下降,在最初4h内下降了90%以上,此后呈缓慢递减趋势.底质中95Zr的比活度在试验前期逐渐上升,至48h达到最大值,此后随时间逐渐降低.半褶织纹螺螺壳富集95Zr的能力显著强于螺肉,螺壳和螺肉的富集系数分别为10.32和4.68.大弹涂鱼各组织器官中,根据富集量,对95Zr的富集能力最强的是内脏,其次是鳃和鳍,最弱的是肌肉,次弱的是脊椎.大弹涂鱼除鳃外,其余各组织器官的富集系数均小于1.半褶织纹螺对95Zr的富集能力比大弹涂鱼更强.Abstract: 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.
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