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首页> 外文期刊>土壤圈（英文版） >Capacities of Clay Fraction of a Latosol to Retain Cations and Anions as Inferred from the Wien Effect in Soil Suspensions
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Capacities of Clay Fraction of a Latosol to Retain Cations and Anions as Inferred from the Wien Effect in Soil Suspensions

机译：从土壤悬浮液中的维恩效应推断，Latosol的粘土级分保留阳离子和阴离子的能力。

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Suspensions of a latosol with a clay concentration of 30 g kg-1 were prepared from electrodialyzed clay fractions, less than 2 μm in diameter, five nitrate solutions with a concentration of 1 × 10-4/z mol L-1,where z is the valence, and five sodium salt solutions with a concentration of 3.3 × 10-5/z mol L-1. The direct current (DC) electrical conductivities (ECs) of the colloidal suspensions were measured at a constant temperature of 25 ℃, using a newly established method of measuring the Wien effect in soil suspensions at field strengths ranging from 13.5 to 150 kV cm-1, to determine their electrical conductivity-field strength relationships and to infer the order of the bonding strength (retaining force) between soil particles and various ions. The measurements with the latosol suspensions in NaNO3, KNO3, Ca(NO3)2, Mg(NO3)2 and Zn(NO3)2 solutions resulted in increments of the suspension ECs, △ECs, of 7.9, 5.0, 7.1, 7.0 and 5.8μS cm-1,respectively, when the applied field strength increased from 14.5 to 142 kV cm-1. As for the suspensions in NaNO3, NaCl, Na2SO4, Na3PO4 and Na3AsO4 solutions, the △ECs were 6.2, 5.3, 4.1, 4.0 and 3.7μS cm-1,respectively, when the applied field strength increased from 13.5 to 90 kV cm-1. Thus, it can be deduced that the retaining forces of the clay fraction of the latosol for the cations were in the descending order K+ ＞Zn2+ ＞ Mg2+ ≥ Ca2+ ＞ Na+, and for the anions in the descending order H2AsO-4 ＞ H2PO-4 ≥ SO42- ＞ Gl- ＞ NO-3.
机译：由电渗析的直径小于2μm的粘土级分，五种浓度为1×10-4 / z mol L-1的硝酸盐溶液制备悬浮液，悬浮液的粘土浓度为30 g kg-1。价和五种钠盐溶液，浓度分别为3.3×10-5 / z mol L-1。使用新建立的在场强13.5至150 kV cm-1范围内测量土壤悬浮液中的维恩效应的方法，在25℃的恒定温度下测量胶体悬浮液的直流电（DC）电导率（ECs）。 ，以确定它们的电导率与场强之间的关系，并推断出土壤颗粒与各种离子之间的结合强度（保持力）的顺序。在NaNO3，KNO3，Ca（NO3）2，Mg（NO3）2和Zn（NO3）2溶液中使用latosol悬浮液进行测量的结果是悬浮液EC，△ECs分别增加了7.9、5.0、7.1、7.0和5.8当施加的场强从14.5 kV cm-1增加到142 kV cm-1时，分别为μScm-1。对于NaNO3，NaCl，Na2SO4，Na3PO4和Na3AsO4溶液中的悬浮液，当施加的场强从13.5增至90 kV cm-1时，△EC分别为6.2、5.3、4.1、4.0和3.7μScm-1。 。因此，可以推断出拉托溶胶的粘土部分对阳离子的保持力的降序为K +＞ Zn2 +＞ Mg2 +≥Ca2 +＞ Na +，而阴离子的降序为H2AsO-4＞ H2PO-4 ≥SO42-＞ Gl-＞ NO-3。

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