研究论文
储昭升,刘文新,汤鸿霄.黄土对钕(Ⅲ)和铈(Ⅲ)在不同pH下的等温吸附特性[J].环境科学学报,2003,23(2):211-215
黄土对钕(Ⅲ)和铈(Ⅲ)在不同pH下的等温吸附特性
- The sorption isotherms of neodymium(Ⅲ) and cerium(Ⅲ) on loess at different pH values
- 基金项目：国家自然科学基金(20037010)资助
- 作者
- 单位
- 储昭升
- 中国科学院生态环境研究中心,北京 100085
- 刘文新
- 中国科学院生态环境研究中心,北京 100085
- 汤鸿霄
- 中国科学院生态环境研究中心,北京 100085
- 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.
- 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 χ2,showed that Langmuir model was appropriate at low pH(=3,5.75)while Freundlich model was preferable at high pH(=6.1,6.9).
- Key words：neodymium cerium sorption isotherm loess non-liner fit
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