| 北京东郊污灌区表层土壤微量元素的小尺度空间结构特征 |
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| 引用本文： | 王学军,邓宝山,张泽浦. 北京东郊污灌区表层土壤微量元素的小尺度空间结构特征[J]. 环境科学学报, 1997, 17(4): 412-416 |
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| 作者姓名： | 王学军 邓宝山 张泽浦 |
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| 作者单位： | 中国农业科学院土壤肥料研究所 |
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| 基金项目： | 国家自然科学青年基金,国家自然科学重点基金,美国国家科学基金 |
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| 摘 要： | 岩溶山区表土中＾７Ｂｅ、＾１３７Ｃｓ、＾２２６Ｒａ和＾２２８Ｒａ地球化学相分配的实验研究表明，４种核素绝大部分存在于Ｆｅ－Ｍｎ氧化物，有机质及残渣相中。它们在表土的迁移过程中具微粒迁移性，能较好地随土粒般运，可作为土粒侵蚀或沉积的示踪剂。
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| 关 键 词： | 地球化学相 土壤 侵蚀示踪 |
| 收稿时间： | 1996-08-06 |
SPATIAL STRUCTURES OF TRACE ELEMENT CONTENTS IN SEWAGE IRRIGATED SOIL AT THE EASTERN SUBURB OF BEIJING |
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| Wang Xuejun,Deng Baoshan and Zhang Zepu. SPATIAL STRUCTURES OF TRACE ELEMENT CONTENTS IN SEWAGE IRRIGATED SOIL AT THE EASTERN SUBURB OF BEIJING[J]. Acta Scientiae Circumstantiae, 1997, 17(4): 412-416 |
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| Authors: | Wang Xuejun Deng Baoshan Zhang Zepu |
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| Affiliation: | Institute of Soil&Fertilizer,Chinese Academy of Agricultural Science,Beijing 100081,Institute of Soil&Fertilizer,Chinese Academy of Agricultural Science,Beijing 100081,State key Laboratory of Environmental Geochemistry,Institute of Geochem istry,Chinese Academy of Sciences,Guiyang 550002,State key Laboratory of Environmental Geochemistry,Institute of Geochem istry,Chinese Academy of Sciences,Guiyang 550002 and State key Laboratory of Environmental Geochemistry,Institute of Geochem istry,Chinese Academy of Sciences,Guiyang 550002 |
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| Abstract: | The experimental results of geochemical speciation in the soils show that more than 85% of 7Be, 137Cs, 226Cs and 228Cs are bound to organic matter, Fe Mn oxy hydroxide and residual fractions. They can be moved with soil particles and used as tracers for erosion and/or accumulation of soil particles. 7Be geochemical speciation in the soils agrees with its trace for seasonal particle transport. 137Cs geochemical speciation is suitable to trace soil particle accumulation as well as sediment dating. 226Cs and 228Cs are combined in crystalline skeleton of clay minerals and mainly remain as a residue in the soils and very little is bound to the soluble, exchangeable, carbonate fractions. The differentials of 226Cs/ 228Cs activity ratios in different geochemical speciation in the soils can be used as a parameter to trace accumulation and/or erosion of soil particles. |
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| Keywords: | Be 137Cs 226Cs 228Cs geochemical speciation soils erosion trace. |
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