Application of nonlinear regression analysis for ammonium exchange by natural (Bigadic) clinoptilolite

被引：57

作者：

Gunay, Ahmet ^{[1
]}

机构：

[1] Balikesir univ, Fac Engn & Architecture, Dept Environm Engn, Balikesir, Turkey

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 148卷 / 03期

关键词：

clinoptilolite; ammonium; nonlinear regression; error function; thermodynamic;

D O I：

10.1016/j.jhazmat.2007.03.041

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The experimental data of ammonium exchange by natural Bigadic clinoptilolite was evaluated using nonlinear regression analysis. Three two-parameters isotherm models (Langmuir, Freundlich and Temkin) and three three-parameters isotherm models (Redlich-Peterson, Sips and Khan) were used to analyse the equilibrium data. Fitting of isotherm models was determined using values of standard normalization error procedure (SNE) and coefficient of determination (R-2). HYBRID error function provided lowest sum of normalized error and Khan model had better performance for modeling the equilibrium data. Thermodynamic investigation indicated that ammonium removal by clinoptilolite was favorable at lower temperatures and exothermic in nature. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：708 / 713

页数：6

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