期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2017
卷号：6
期号：7
页码：13743
DOI：10.15680/IJIRSET.2017.0607137
出版社：S&S Publications
摘要：The first objective presented in this study is first to improve the surface properties of pyrophyllitefollowing the treatment carried out which developed the active sites on the surface of this material. The treated materialwas characterized by DRX, X-ray fluorescence, IRTF and SEM. The pyrophyllite was modified by coating withaminosilane 3- (2-aminoethylamino) propyl-methyldimethoxysilane (APMDS). It has been suggested that theformation of hydrogen bonds took place between the hydroxyl groups and/or oxygen atoms within the structure ofpyrophyllite and the hydroxyl groups of the APMDS. The second objective of this study is the application of thismaterial in the removal of iron (Fe(III)) and copper (Cu(II)) in aqueous solutions, and the highlighting of theeffectiveness of the treated material compared to the natural clay vis-a-vis the adsorption of these metal ions. Variousparameters are determined and optimized: the contact time, the pH, the density of the pulp and the initial concentrationof the solute. These experiences have lead to the fact that the adsorption capacities of the Fe(III) and Cu(II) are muchmore important in the case of the pyrophyllite-APMDS in comparison with those of natural pyrophyllite . Thus, the rateof elimination of Fe (III) increases from 54% for natural pyrophyllite to 90% for pyrophyllite-APMDS. For Cu (II) theremoval rate is 60% in the case of pyrophyllite-APMDS and 18% in the case of natural pyrophyllite. The studiescarried out also showed that the two treated and untreated adsorbents have more affinity with iron than with copper.
关键词：Modified Clay; Pyrophyllite; Aminosilane; characterization; adsorption; heavy metals.
