Groupement de Recherche Eau Sol Environnement (EA 4330), Université de Limoges, 123 avenue Albert Thomas, 87060 Limoges, France.
Environ Technol. 2010 Jun;31(7):815-22. doi: 10.1080/09593331003667758.
The adsorption of two basic dyes, CI Basic Yellow 28 and CI Basic Green 4, was studied in single and binary solute systems using two classes of inorganic-organic pillared clay granules as sorbents (300-400 microm and 700-800 microm). These were prepared by high-shear wet granulation from an Al cetyltrimethylammonium bromide intercalated clay powder (particle diameter < 50 microm). Adsorption rate data indicate that BY 28 adsorbs more rapidly than BG 4 and a pseudo-first-order model was found to fit the kinetic curves, with regression coefficients above 0.98. Adsorption isotherms in single solute systems at pH 3 and pH6 were respectively analysed according to the Langmuir and Freundlich models using non-linear regression. Best fits were obtained with the Langmuir model. In binary dye systems the adsorption at three molar ratios (1:9, 1:1 and 9:1) demonstrated that the adsorption of BG 4 was greater than that of BY 28 on all the sorbents studied; this was in agreement with the results obtained for single solute systems. Increasing the granule size decreased dye adsorption, an effect in accordance with the Sheindorf-Rebuhn-Sheintuch model.
采用两类无机-有机柱撑粘土颗粒（300-400μm 和 700-800μm）作为吸附剂，研究了两种碱性染料（CI 碱性黄 28 和 CI 碱性绿 4）在单一和二元溶质体系中的吸附情况。这些颗粒是通过高剪切湿法制粒从乙酰丙酮铝插层粘土粉末（粒径<50μm）制备的。吸附速率数据表明，BY 28 的吸附速度比 BG 4 快，并且发现拟一级动力学模型可以拟合动力学曲线，回归系数均高于 0.98。在 pH 3 和 pH 6 的单一溶质体系中，分别根据 Langmuir 和 Freundlich 模型，采用非线性回归对吸附等温线进行了分析。Langmuir 模型的拟合效果最佳。在二元染料体系中，在三种摩尔比（1:9、1:1 和 9:1）下的吸附表明，在所研究的所有吸附剂上，BG 4 的吸附均大于 BY 28；这与单溶质体系的结果一致。增加颗粒尺寸会降低染料吸附，这一效应与 Sheindorf-Rebuhn-Sheintuch 模型一致。
