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标题：The adsorption of Cr (VI) from aqueous solution by natural materials
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作者：Ksakas A. ; Loqman A. ; El Bali B. 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2015
卷号：6
期号：7
页码：2003-2012
出版社：University of Mohammed Premier Oujda
摘要：This study deals with the adsorption of chro mium (VI) from the new natural materials from Morocco. The adsorbents used are characterized by different physic-chemical tech niques: X-ray fluorescence spectrometry, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR). The effects of initial concentration of Cr (VI) ion, temperature, amount of adsorbent and pH of the solution on adsorption have been investigated. Optimum conditions for adsorption were determined as initial co ncentration of 100 mg/L, adsorbent dose=2g, and pH=2, by using the results of these experiments and an additional set of experiments was performed under these optimum conditions in order to see the change in the adsorption efficiency. Removal of chromium ion was found as highly dependent on pH and initial Cr (VI) concentratio n of the solution. The adsorption isotherms obey the Langmuir equation was obtained a maximum adsorption capacity of 15.67 mg/g and 14.43 mg/g, for the material KS and PN respectively. Although experimental data confirm with both Langmuir and Freundlich isotherm models. The results of this study confirm that these materials can be considered effective adsorbents for the removal of chromium (VI).
关键词：Materials; Adsorption; Chromium (VI); Isotherm; Removal