Study of malachite green adsorption by organically modified clay using a batch method

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• 作者：Sof¨ªa Arellano-C¨¢rdenas ; Socorro L¨®pez-Cortez ; Maribel Cornejo-Maz¨®n ; Juan Carlos Mares-Guti¨¦rrez
• 关键词：Adsorption ; Malachite green ; Dye ; Organoclay ; Modified clay
• 刊名：Applied Surface Science
• 出版年：2013
• 出版时间：1 September, 2013
• 年：2013
• 卷：280
• 期：Complete
• 页码：74-78
• 全文大小：768 K

文摘

The adsorption of toxic dye malachite green from aqueous effluents by organically modified clay was studied in a batch system. The organoclay (OC) used was prepared by the intercalation of cationic surfactant hexadecyltrimethylammonium bromide in a Mexican montmorillonite. The effects of initial dye concentration, temperature, pH, and contact time were investigated. The OC showed a high dye removal (99.6 % ) from an initial dye concentration of 60 mg L^?1 at pH 6 and 25 ¡ãC. The adsorption capacity was independent of pH and increased with the temperature. Equilibrium data were well fitted by Langmuir adsorption model. The rate of sorption was adjusted to a pseudo second-order kinetic model.