Allen S J, McKay G, Porter J F
School of Chemical Engineering, Queen's University Belfast, Belfast, UK.
J Colloid Interface Sci. 2004 Dec 15;280(2):322-33. doi: 10.1016/j.jcis.2004.08.078.
Colored effluents from textile industries are a problem in many rivers and waterways. Prediction of dye adsorption capacities is important in design considerations. The sorption of three basic dyes, namely Basic blue 3, Basic yellow 21, and Basic red 22, onto peat is reported. Equilibrium sorption isotherms have been measured for the three single-component systems. Equilibrium was achieved after 21 days. The experimental isotherm data were analyzed using Langmuir, Freundlich, Redlich-Peterson, Tempkin, and Toth isotherm equations. A detailed error analysis has been undertaken to investigate the effect of using different error criteria for the determination of the single-component isotherm parameters and hence obtain the best isotherm and isotherm parameters which describe the adsorption process. The linear transform model provided the highest R(2) regression coefficient with the Redlich-Peterson model. The Redlich-Peterson model also yielded the best fit to experimental data for all three dyes using the nonlinear error functions. An extended Langmuir model has been used to predict the isotherm data for the binary systems using the single component data. The correlation between theoretical and experimental data had only limited success due to competitive and interactive effects between the dyes and the dye-surface interactions.
纺织工业产生的有色废水是许多河流和水道面临的一个问题。在设计考量中，预测染料吸附容量很重要。本文报道了三种碱性染料，即碱性蓝3、碱性黄21和碱性红22在泥炭上的吸附情况。已对这三个单组分体系测定了平衡吸附等温线。21天后达到平衡。使用朗缪尔、弗伦德利希、雷德利希 - 彼得森、坦普金和托特等温线方程对实验等温线数据进行了分析。已进行详细的误差分析，以研究使用不同误差标准确定单组分等温线参数的影响，从而获得描述吸附过程的最佳等温线和等温线参数。线性变换模型与雷德利希 - 彼得森模型的R(2)回归系数最高。使用非线性误差函数时，雷德利希 - 彼得森模型对所有三种染料的实验数据拟合效果也最佳。已使用扩展朗缪尔模型，利用单组分数据预测二元体系的等温线数据。由于染料之间的竞争和相互作用以及染料与表面的相互作用，理论数据与实验数据之间的相关性仅取得了有限的成功。
