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.
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.
出处
《中国农业科学》
CAS
CSCD
北大核心
2005年第1期102-109,共8页
Scientia Agricultura Sinica
基金
国家"863"计划课题资助项目(2001AA218041)
