【摘要】 研究了黄土对钕 (Ⅲ )和铈 (Ⅲ )在不同pH下的等温吸附特性 ,采用Langmuir及Freundlich两种吸附模型对吸附数据进行了描述 .并分析、比较了线性及非线性两种拟合的方法 .非线性拟合 ,由于数据形式没有转换 ,求得的模型参数较线性方法比较可靠 ;非线性拟合结果表明 ,在低pH( =3 ,5 75 )下 ,等温吸附行为更符合Langmuir模型 ,而在高pH( =6 1,6 9)下 ,更符合Freundlich模型更多还原

【Abstract】 the sorption isotherms of neodymium(Ⅲ) and cerium(Ⅲ) on loess were investigated at different pH.Langmuir and Freumdlich models were applied to describe the sorption data.Comparison the methods of liner and non-liner fit,it was suggested that nonlinear-fit was more reliable because there are no transforms of isotherms.The goodness-of-fit,as indicated by sum of the squares of the deviations χ 2,showed that Langmuir model was appropriate at low pH(=3,5.75)while Freundlich model was preferable at high pH(=6.1,6.9).更多还原