Electrical Characteristics and Desorption Kinetics of Soil Boron

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Electrical Characteristics and Desorption Kinetics of Soil Boron

机译：土壤硼的电学特性和解吸动力学

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The status and activities of boron in soils were studied by the approach of electro-ultrafiltration (EUF). The samples of soils, including brown-red soil and calcareous alluvial soil, were collected from Hubei Province of China. The soil samples were incubated in saturated water and then their nutrients were ultrafiltrated with EUF equipment. Filtration and extraction were conducted in accordance with routine process, but fractions in anode and cathode were all collected. Analyses of B, K+, Mg2+, Ca2+, C1- and pH in fractions supposed that boron existed not only in a simple form of borate but also in ion-pair with cations partly in acidic soil,and borate was the primary form existing in the calcareous soil. In studying desorption kinetics with EUF,the boron content of Fractions 2～6 was accumulated, and the accumulative quantities were fit to time factors in three kinetic equations: the zero-order, first-order, and arabolic diffusion equations. Fit degree of the parabolic diffusion equation was the best, followed by the zero-order quation, and the first-order equation was the worst.

机译：通过电超滤（EUF）方法研究了土壤中硼的状况和活性。土壤样品包括棕红色土壤和钙质冲积土壤，均来自中国湖北省。将土壤样品在饱和水中孵育，然后用EUF设备将其养分超滤。过滤和萃取按照常规方法进行，但阳极和阴极中的馏分均被收集。对B，K +，Mg2 +，Ca2 +，C1-和pH的分析表明，硼不仅以简单的硼酸盐形式存在，而且与阳离子成对存在离子对，并且在酸性土壤中以硼酸盐形式存在。钙质土壤。在利用EUF进行解吸动力学研究中，积累了2〜6级分的硼含量，并且在三个动力学方程（零阶，一阶和阿拉伯扩散方程）中将累积量与时间因子进行了拟合。抛物线扩散方程的拟合度最好，其次为零阶方程，一阶方程的拟合度最差。

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《土壤圈（英文版）》 |2000年第1期|61-68|共8页
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Department of Resources, Environment and Agrochemistry, Huazhong Agricultural University, Wuhan 430070rn(China);

Department of Resources, Environment and Agrochemistry, Huazhong Agricultural University, Wuhan 430070rn(China);

Department of Resources, Environment and Agrochemistry, Huazhong Agricultural University, Wuhan 430070rn(China);

Department of Resources, Environment and Agrochemistry, Huazhong Agricultural University, Wuhan 430070rn(China);

Department of Resources, Environment and Agrochemistry, Huazhong Agricultural University, Wuhan 430070rn(China);

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
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关键词
boron; desorption kinetics; electro-ultrafiltration; soil;

机译：硼;解吸动力学;电超滤;土壤;

Electrical Characteristics and Desorption Kinetics of Soil Boron

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