中国农业科学 ›› 2005, Vol. 38 ›› Issue (01): 102-109 .

• 土壤肥料.节水灌溉 • 上一篇    下一篇

不同耐低磷基因型玉米磷营养特性研究

刘秀梅,张夫道,张树清   

  1. 土肥所
  • 收稿日期:2004-04-19 修回日期:1900-01-01 出版日期:2005-01-10 发布日期:2005-01-10
  • 通讯作者: 刘秀梅

Study on Adsorption and Desorption Properties of Nano-kaoline to Nitrogen, Phosphorus, Potash and Organic Carbon

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  1. 土肥所
  • Received:2004-04-19 Revised:1900-01-01 Online:2005-01-10 Published:2005-01-10

摘要: 研究了纳米级和天然高岭土对营养元素氮、磷、钾和有机碳的吸附及解吸特性。结果表明,在相同的初始处理浓度下,纳米级高岭土对氮、磷、钾和有机碳的吸附量均比天然高岭土高,氮的吸附量是天然高岭土的1.5~1.7倍、磷是1.9~2.2倍、钾是1.4~2倍、碳是1.3~1.9倍。纳米级和天然高岭土对氮、磷、钾和有机碳的解吸量与其吸附量呈正相关。2种高岭土对氮、磷、钾和有机碳的吸附规律均可用Langmuir和 Freundlich 方程来拟合。

关键词: 纳米级高岭土, 吸附, 解吸, 方程

Abstract: This paper deals with the adsorption and desorption characteristics of kaoline to organic carbon and three nutrient elements, i.e. nitrogen, phosphorus and potash. The adsorption amounts of nano-kaoline to organic carbon , nitrogen, phosphorus and potash were higher than natural kaoline; especially, the adsorption amounts of nano-kaoline to nitrogen, phosphorus, patosh, and organic carbon were 1.5-1.7, 1.9-2.2 , 1.4-2.0, and 1.3-1.9 times higher than that of natural kaoline, respectively. The desorption amounts of natural kaoline and nano-kaoline increased with the increase of the adsorption amounts of organic carbon, nitrogen, phosphorus and potash. Both natural and nano-kaoline adsorption properties could be depicted with Langmuir and Freundlich equations.

Key words: Nano-kaoline, Adsorption, Desorption, Equation