Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran.
Department of Chemistry, University of Isfahan, Isfahan, Iran.
J Colloid Interface Sci. 2020 Jun 15;570:390-401. doi: 10.1016/j.jcis.2020.03.003. Epub 2020 Mar 5.
Reactive dyes have been identified to be highly hazardous pollutants because they were shown to be more toxic towards mammals than general organic compounds and organic dyes. Accordingly, for the first time, meso-architectured mercapto-modified siliceous hollow quasi-capsules (SH-SHQC) were prepared by a facile, ultrasonic-assisted, and one-step synthesis protocol. Adsorptive removal of rhodamine B (RhB) and methylene blue (MB) onto SH-SHQC in a batch system has been investigated. Isotherm results agreed very well with the Langmuir equation for both dyes. The maximum adsorption capacity of SH-SHQC for RhB and MB was determined with the Langmuir equation and was found to be 147.06 and 119.05 mg g at 298 K, respectively (pH: 6.0 for RhB and 7.0 for MB; adsorbent dosage: 15.0 mg; the volume of the dye solution: 40.0 mL). Among different kinetic models, the pseudo-first-order equation was better fitted since experimental data agreed very well with theoretical data. SH-SHQC was shown to be a promising adsorbent for adsorptive removal of reactive dyes from aqueous solutions. To date, there has been no report on the adsorption of reactive dye cations by meso-architectured mercapto-modified siliceous hollow quasi-capsules prepared by an ultrasonic-assisted, one-pot, and sol-gel synthesis method.
已经确定反应性染料是高度危险的污染物，因为它们对哺乳动物的毒性比一般有机化合物和有机染料更强。因此，首次通过简便、超声辅助和一步合成法制备了介孔结构的巯基修饰硅质中空准胶囊（SH-SHQC）。在批处理系统中研究了 SH-SHQC 对罗丹明 B（RhB）和亚甲蓝（MB）的吸附去除。等温线结果与两种染料的朗缪尔方程非常吻合。用朗缪尔方程确定了 SH-SHQC 对 RhB 和 MB 的最大吸附容量，分别在 298 K 时为 147.06 和 119.05 mg/g（pH：RhB 为 6.0，MB 为 7.0；吸附剂用量：15.0 mg；染料溶液体积：40.0 mL）。在不同的动力学模型中，拟一级方程拟合得更好，因为实验数据与理论数据非常吻合。SH-SHQC 是一种很有前途的吸附剂，可用于从水溶液中吸附去除反应性染料。迄今为止，还没有关于介孔结构的巯基修饰硅质中空准胶囊通过超声辅助、一锅法和溶胶-凝胶合成方法制备对反应性染料阳离子吸附的报道。
