Influence of exchangeable cations on water adsorption by soil clays
Influence of exchangeable cations on water adsorption by soil clays
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DOI：
10.2136/sssaj2004.1218
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发表时间：
2004-07-01
影响因子：
2.9
通讯作者：
Bigham, JM
中科院分区：
文献类型：
--
作者：
Dontsova, KM;Norton, LD;Bigham, JM
水与粘粒组分的相互作用（F < 0.0001）。H-O-H弯曲带（nu（2）模式）的位置也随着可交换阳离子离子的离子势的增加而增加，表明水氢键的加强。此外，据观察，该频带的位置随着Mg交换粘土的水含量的增加而降低，与Ca交换样品的总体增加相比。X-射线衍射图表明膨胀的层状硅酸盐粘土矿物的水活性增加，但是，没有观察到之间的Ca和Mg交换样品的差异。这项研究表明，钙和镁交换的土壤粘土上的水的分子性质是类似的试样粘土，并提供了新的见解交换性阳离子在土壤中的作用。
The interaction of water with the clay fractions ( F < 0.0001). The position of the H-O-H bending band (nu(2) mode) also increased with increasing ionic potential of the exchangeable cation indicating strengthening of water H bonds. In addition, it was observed that the position of this band decreased with increasing water content for the Mg-exchanged clays compared with an overall increase for the Ca-exchanged samples. X-ray diffraction patterns indicated an expansion of the phyllosilicate clay minerals as the water activity increased; however, no differences were observed between the Ca- and Mg-exchanged samples. This study shows that the molecular properties of water on Ca- and Mg-exchanged soil clays are similar to that on specimen clays and provides new insight about the role of exchangeable cations in soils.