摘要
水体中(134)~Cs的消失和水生植物对(134)~Cs的吸收均以指数回归形式进行。螃蜞菊(Alternanthera philoxeroides)对水体中(134)~Cs的吸收速率最快,富集系数最高,达560。卡州萍(Azolla caroliniana W.)为12.8。金鱼藻(Ceratophyll-um demersum L.)和水葫芦(Eichhornia crassipes)分别为4.6和3.5。因此,螃蜞菊能净化水体中的(134)~Cs。植物根系吸收(134)~Cs后,能把它运转到地上部,螃蜞菊中约有75％的(134)~Cs停留于根部,25％运转到地上部。
The disappearance of 134Cs in water phase and the absorption of 134Cs by aquatic plants could be expressed as the form of exponential function. The absorption rate of 134Cs by Alternanthera philoxeroides in water phase is the fastest among the aquatic plants studied. The concentration factors of 134Cs(K)in Alternanthera philoxeroides, Azolla caroliniana W,,Cerato-phyllum demzrsum L. and Eichhornia crassipes are 560, 12.8, 4.6 and 3.5 respectively. The large K value of Alternanthera philoxeroides indicates that it can be used to purge 134Cs in water phase. 134Cs can be absorbed by roots and transfered to shoots.About 75% of 134Cs is in the roots and 25% in the shoots.
出处
《核农学报》
CAS
CSCD
1990年第3期139-144,共6页
Journal of Nuclear Agricultural Sciences
