沸石MCM - 22在去除废水中碱性染料方面的应用。
Application of zeolite MCM-22 for basic dye removal from wastewater.
作者信息
Wang Shaobin, Li Huiting, Xu Longya
机构信息
Department of Chemical Engineering, Curtin University of Technology, G.P.O. Box U1987, Perth, WA 6845, Australia.
出版信息
J Colloid Interface Sci. 2006 Mar 1;295(1):71-8. doi: 10.1016/j.jcis.2005.08.006. Epub 2005 Sep 6.
MCM-22 was employed as an effective adsorbent for removal of basic dyes including methylene blue, crystal violet, and rhodamine B from aqueous solution. The adsorption kinetics and isotherms were investigated. The adsorption capacity of MCM-22 for three dyes follows an order of MB > CV approximately RB. Kinetic studies indicate that the adsorption follows the pseudo second-order kinetics and the adsorption is a two-step diffusion process with film diffusion dominating the process. The adsorption isotherm can be well fitted by both the Langmuir and the Freundlich models. Thermodynamic calculations suggest that the adsorption of basic dyes on MCM-22 is an endothermic reaction.
MCM-22被用作从水溶液中去除碱性染料（包括亚甲基蓝、结晶紫和罗丹明B）的有效吸附剂。研究了吸附动力学和等温线。MCM-22对三种染料的吸附容量顺序为MB > CV ≈ RB。动力学研究表明，吸附遵循准二级动力学，且吸附是一个两步扩散过程，膜扩散主导该过程。吸附等温线可以用Langmuir模型和Freundlich模型很好地拟合。热力学计算表明，碱性染料在MCM-22上的吸附是一个吸热反应。
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