文章基本信息

标题：The regeneration of the pre used ashes in the elimination fluorides ions from the underground waters
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作者：Moufti A. ; Annouar S. ; Mountadar S. 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：6
页码：2069-2073
出版社：University of Mohammed Premier Oujda
摘要：After studying the mechanisms and optimization o f the conditions of adsorption of soluble fluoride in gro undwater (Youssoufia-Morocco) on fly ash [1], interest has been focused on the regeneration performance of these pre-used ashes to estimate their lifetime. The results showed, firstly, that the desorption is possible and effective step proceeds using a basic solutio n of ammonia and lime. The optimum desorption conditions are a breakthrough time of at least 30 minutes and a concentration around 1M for lime and 4M for ammonia, with a desorption percentage of 92% .In the second time we have shown that the number of successive adsorption cycles tolerated by the ash is at least 10 cycles. Finally, some parameters influencing the desorption such as the concentration of lime, volume to implement, the desorption kinetics were optimized.
关键词：Fly ash; Fluoride; kinetics of desorption; Ground water