| 红壤中SO42-解吸动力学研究 |
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| 引用本文： | 章钢娅. 红壤中SO42-解吸动力学研究[J]. 土壤学报, 2001, 38(2): 235-240 |
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| 作者姓名： | 章钢娅 |
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| 作者单位： | 中国科学院南京土壤研究所, |
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| 基金项目： | *国家自然科学基金(49831005);中国科学院重点项目(KZ952-J1-204);南京土壤研究所土壤圈物质循环开放实验室 |
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| 摘 要： | 研究了四种红壤用硫酸盐溶液处理后ＳＯ４２－解吸动力学特点及ｐＨ和温度的影响。结果显示，其最大解吸量在７０％～９４％之间。解吸曲线的数据用Ｅｌｏｖｉｃｈ方程和双常数方程可以很好的拟合。ｐＨ升高时解吸量增加，解吸速度变慢。温度升高时解吸量增加，反应速度加快。根据Ａｒｒｈｅｎｉｕｓ公式估算出的活化能为２３．３５ ｋＪ ｍｏｌ－１。
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| 关 键 词： | 红壤 可变电荷土壤 解吸动力学 SO42-解吸 |
| 收稿时间： | 1999-09-25 |
| 修稿时间： | 1999-09-25 |
KINETIC STUDY ON SULFATE ADSORPTION IN RED SOILS |
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| Zhang Gang-ya. KINETIC STUDY ON SULFATE ADSORPTION IN RED SOILS[J]. Acta Pedologica Sinica, 2001, 38(2): 235-240 |
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| Authors: | Zhang Gang-ya |
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| Affiliation: | Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 |
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| Abstract: | The properties of desorption dynamics of sulfate and the effects of pH and temperature in four red soils were studied. The results showed that the maximum desorption was 70%-94%. The data of desorption curves can be fitted well by the Elovich equation and two-constant kinetic equation. The amount of desorption increased and velocity of desorption slowed down with the increase in pH. The amount of desorption increased and velocity of desorption speeded up with the increase in temperature. The activation energy calculated according to Arrheius equation was 23.35 kJ mol-1. |
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| Keywords: | Red soil Variable charge soil Desorption dynamics Sulfate desorption |
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