| 土壤水稻系统中210Pb和210Bi的行为及载体Pb的影响 |
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| 引用本文： | 李书鼎.土壤水稻系统中210Pb和210Bi的行为及载体Pb的影响[J].环境科学学报,1993,13(2):157-163. |
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| 作者姓名： | 李书鼎 |
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| 作者单位： | 中国科学院沈阳应用生态研究所 110015 |
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| 摘 要： | 采用~(210)Pb示踪方法,研究了~(210)Pb和~(210)Bi在土壤和水稻中存在的形态.土壤中~(210)Pb主要以可给态存在,占总量的79％—91％.~(210)Bi主要以结合态存在,占总量的80％—98％,随时间增长,可给态~(210)Pb逐渐向结合态转变;结合态~(210)Bi向着可给态方向变化.进入水稻的~(210)Pb和~(210)Bi大部分是自由移动的离子形式,~(210)Pb的结合态<1％;~(210)Bi占40％.~(210)Pb和~(210)Bi性质上的差异表现了土壤对二者吸附力强弱的不同.还讨论了载体Pb对~(210)Pb和~(210)Bi吸附行为的影响.
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| 关 键 词： | 示踪法 载体 土壤 水稻 铅 铋 |
| 收稿时间： | 1991/6/24 0:00:00 |
BEHAVIOR OF 210Pb AND 210Bi IN SOIL-RICE SYSTEM AND THE EFFECTS OF CARRIER-Pb |
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| Li Shuding.BEHAVIOR OF 210Pb AND 210Bi IN SOIL-RICE SYSTEM AND THE EFFECTS OF CARRIER-Pb[J].Acta Scientiae Circumstantiae,1993,13(2):157-163. |
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| Authors: | Li Shuding |
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| Affiliation: | Institute of Application Ecology, Chinese Academy of Sciences, Shenyang 110015 |
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| Abstract: | Chemical species of ~(210)Pb and ~(210)Bi in soil and rice were investigated using 210Pb trace experiment. 79%-91% of 210Pb in the soil was in available fraction. On the contrary, 80%-98% of 210Bi was bound. The available 210Pb in the soil was changed slowly into bound fraction, while the bound 210Bi transformed gradually into available one. Much of 210Pb and 210Bi entered into rice were as inorganic free ions. The bound 210Pb in rice was less than l% and the bound 210Bi was around 40%. The different adsorption affinities between 210Pb and 210Bi were demonstrated by the different behavior of them. The effect of carrier-Pb on adsorption of 210Pb and 210Bi was also discussed. |
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| Keywords: | Tracer fractionation carrier soil rice |
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