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标题：Removal of blue levafix dye from aqueous solution by clays
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作者：L. ELayazi ; I. Ellouzi ; A.Khairat 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2014
卷号：5
期号：S1
页码：2030-2036
出版社：University of Mohammed Premier Oujda
摘要：Dyes have become one of the main sources of severe water pollution as a result of the rapid development of the textile industries. It is reported that there are over than 100.000 commercially available dyes with a production of over 7x105 metric tons per year. In order to eliminate Blue Levafix dye from aqueous solution, batch adsorption studies were carried out using natural clay (Bentonite of Nador-Morocco), and commercial clays (Montmorillonite and Kaolin). Adsorption experiments were conducted under various conditions: initial dye concentration, amount of clay, contact time, solid-liquid ratio, and organic matter concentration. Adsorption process fitted the first order kinetic. All isotherms were described by the Freundlich equation with a good regression factor (>0.9). The Freundlich parameters Kf permit to classify different adsorbents in ascending order Bentonite < Montmorillonite < Kaolin. The sorption of Blue Levafix dye on clays is favored with the presence of organic matter, in acid media and for solid liquid ratio 1 for bentonite and montmorillonite and 2 for kaolin.a
关键词：Adsorption; clay; dye; isotherm; organic matter.