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标题：Application of raw and roasted date seeds for dyes removal from aqueous solution
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作者：M. El Marouani ; K. Azoulay ; I. Bencheikh 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2018
卷号：9
期号：8
页码：2387-2396
出版社：University of Mohammed Premier Oujda
摘要：The present study concerns the adsorption in aqueous solution of methylene blue(MB) and methyl orange (MO) on raw date seeds powder (RDS), roasted date seeds(RoDS), carbonized date seeds (CDS) and commercial activated carbon (CAC) takenas a reference. Infrared spectroscopy has been used to characterize theaforementioned adsorbents. The adsorption tests were carried out by varying themass of the adsorbent, the initial concentration of the adsorbate and the pH ofadsorbate solution. The optimum removal conditions have been determined using thesurface response methodology to fit retention rate. Optimal dyes (5 mg/L) removaloccurs at pH 5 with sorbent dose of 75 mg/L. Results of adsorption on variousexamined materials show that raw and roasted date seeds!are effective sorbents forremoving MB from aqueous solution. The infrared analysis reveals that thefunctional groups involved in the adsorption exist in RDS and RoDS but not in CDS.MB is adsorbed in multilayers on heterogeneous surfaces. The adsorption process ofthe MB on the examined adsorbents is controlled by the chemisorption.
关键词：Raw Date Seeds (RDS); Roasted Date Seeds;(RoDS); Commercial Activated;Carbon (CAC); Adsorption; Methylene Blue (MB); Methyl Orange (MO); Response surface;methodology (RSM)