^(134)Cs在茶树上的行为

BEHAVIOR OF CESIUM - 134 IN THE TEA TREE

茶树喷洒^(134)Cs后,^(134)Cs在老茶叶上的残留和新茶叶上的吸收都遵循一级反应动力学模式。^(134)Cs叶面污染后危害性最大,水质污染和土壤污染具有潜在的危害性。茶树对^(134)Cs的富集能力低,K值为0.02;鲜茶叶经制茶加工后,^(134)Cs的损失率达13.3％;茶叶经4次浸泡后,^(134)Cs的总浸出率为83.6％。

The radioactivity changes of 134Cs in the aged and the young leaves followed an exponential regression function after spraying 134Cs in the tea trees. Contamination by spraying 134Cs greatly harmed tea tree and by irrigating or mixing 134Cs with soil resulted in a potential endangement. The concentrating ability of tea leaves for 134Cs was very low and K value was 0.02. After the fresh tea leaves were processed to dry tea, the content of 134Cs decreased by about 13.3%. When the tea leaves were soaked in hot water, the extraction ratio was around 83.6%.