| 水溶性阳离子在工程黄土中的扩散特性 |
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| 引用本文： | 王朝辉,岳宝蓉.水溶性阳离子在工程黄土中的扩散特性[J].水土保持通报,1998,18(2):9-13. |
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| 作者姓名： | 王朝辉 岳宝蓉 |
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| 作者单位： | 1. 西北农业大学资源与环境科学系·陕西,杨陵·712100
2. 水利部西北水利科学研究所 |
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| 基金项目： | 陕西省自然科学基金，， |
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| 摘 要： | 该文采用水平扩散池观测了水溶性盐阳离子在工程黄土中的扩散过程。结果表明：水溶性盐阳离子在土壤中的扩散性因离子种类而异，Ｃａ＾２＋的扩散系数最高，Ｍｇ＾２＋，Ｎａ＾＋，Ｋ＾＋依次降低，其由两个模型测定的平均值分别为２．６９２８×１０＾－６，２．３１２７×１０＾－６，１．６７３０×１０＾－６，０．４５０４×１０＾０－６ｃｍ＾２／ｓ。在距源溶液较近时，土壤胶体交换性Ｋ＾＋，Ｎａ＾＋，Ｍｇ６２＋均明显升高
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| 关 键 词： | 工程黄土 阳离子 扩散 |
| 收稿时间： | 1997/12/24 0:00:00 |
Diffussion Characteristics of Water Soluable Cations in Engineering Loess |
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| Wang Zhaohui.Diffussion Characteristics of Water Soluable Cations in Engineering Loess[J].Bulletin of Soil and Water Conservation,1998,18(2):9-13. |
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| Authors: | Wang Zhaohui |
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| Institution: | Northwestern Agricultrual University,Natural Resource and Environment Department,Yangling,Shaanxi Province,712100,PRC;Northwestern Water Resource Science Institute |
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| Abstract: | Horizontal diffussion cells were used to observe and measure the diffussion processes of the water soluable salt cations in engineering loess.The results obtained showed that the diffussion characteristics of every cation changed with its variety.The diffussion coefficient of Ca2+was the highest,and that of Mg2+, Na+ and K+ dropped in turn.The mean values of them determined in the two models were 2.692 8×10-6,2.312 7×10-6,1.6370×10-6 and 0.4504×10-6cm2/s respectively.The significant increase of the exchangeable K+, Na+ and Mg2+,and the decrease of the exchangeable Ca2+in soil near the source solution indicated that the formers were absorpted and the later was desorpted by the soil collision. |
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| Keywords: | engineering loess cations diffussion |
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