| 草甸棕壤对~(210)Pb(Pb)、~(210)Bi的吸附和pH的影响 |
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| 引用本文： | 李书鼎,张海荣.草甸棕壤对~(210)Pb(Pb)、~(210)Bi的吸附和pH的影响[J].环境科学学报,1987,7(4):493-497. |
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| 作者姓名： | 李书鼎 张海荣 |
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| 作者单位： | 中国科学院林业土壤研究所
(李书鼎)，中国科学院林业土壤研究所(张海荣) |
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| 摘 要： | 根据土壤中几种无机配位体浓度,推算了Pb不同沉淀形式所对应的浓度,并将其与~(210)Pb示踪实验测量值对比,证明土壤中Pb主要是以磷酸盐形式存在。~(210)Bi和Pb共沉淀后被土壤吸附。pH对土壤~(210)Pb(Pb)、~(210)Bi、吸附影响曲线形状相似。土壤Pb和~(210)Bi分别在pH值为5和2.6时解吸。测定了土壤—水系统中~(210)Pb和~(210)Bi的分配系数,分别为(0.5—0.6)×10~3和(0.3—3.0)×10~4。
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| 关 键 词： | 吸附 土壤 放射性示踪剂铅 铋 |
| 收稿时间： | 1986/9/18 0:00:00 |
ADSORPTION OF 210Pb(Pb) AND 210Bi ON SOIL PARTICLES |
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| Li Shuding and Zhang Hairong.ADSORPTION OF 210Pb(Pb) AND 210Bi ON SOIL PARTICLES[J].Acta Scientiae Circumstantiae,1987,7(4):493-497. |
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| Authors: | Li Shuding and Zhang Hairong |
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| Institution: | Institute of Forestry and Pedology, Academia Sinica and Institute of Forestry and Pedology, Academia Sinica |
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| Abstract: | The Pb speciality in meadow brown soil was studied by chemical equilibrium calculation and 210Pb tracer experiment. The results showed that the dominant species of Pb in the soil was phosphate. A similar experiment demonstrated that 210Bi was adsorpted on soil particles after coprecipitated with Pb. Desorption of Pb and 210Bi occurred at pH less than 5 and 2.6, respectively. At pH greater than 12.5, both metals tended to be desorpted from soil particles, though the desorption process of Pb is much more fast than that of 210Bi. The distribution coefficients of 210Pb and 210Bi in the soil-water system were measured to be (0.5-6.0) ×103 and (0.3-3.0) ×104,respectively. |
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| Keywords: | adsorption soil rediotracer lead bismuth |
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