Defluoridation of groundwater by calcined Mg/Al layered double hydroxide

作     者：A.Elhalil S.Qourzal F.Z.Mahjoubi R.Elmoubarki M.Farnane H.Tounsadi M.Sadiq M.Abdennouri N.Barka 

作者机构：Univ Hassan 1Laboratoire des Sciences des Matéeriauxdes Milieux et de la Modélisation(LS3M)BP.14525000 KhouribgaMorocco Equipe de MatériauxPhotocatalyse et EnvironnementDépartement de ChimieFacultédes SciencesUniversitéIbn ZohrB.P.8106 CitéDakhlaAgadirMorocco 

出 版 物：《Emerging Contaminants》 (新兴污染物（英文）)

年 卷 期：2016年第2卷第1期

页      面：42-48页

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

主　　题：Fluoride removal Groundwater Layered double hydroxide Drinking water quality 

摘      要：The present study evaluated calcined Mg/Al layered double hydroxide(CLDH)availability for the removal of fluoride from local *** Mg/Al layered double hydroxide(LDH)was synthesized by coprecipitation method and characterized by XRD,FT-IR and TGA-TDA *** defluoridation experiments were performed under various conditions such as calcination,solution pH,contact time,temperature,material dosage and *** results indicate that fluoride removal strongly increased after calcination of the LDH up to 600℃.The maximum fluoride removal was obtained at solution pH of *** of fluoride removal followed the pseudo-second order kinetic *** rise in solution temperature strongly enhances the removal *** adsorption mechanism involved surface adsorption,ion exchange interaction and original LDH structure reconstruction by rehydration of mixed metal oxides and concomitant intercalation of fluoride ions into the interlayer *** optimum dosages required to meet the national standard for drinking water quality were found to be 0.29 and 0.8 g/L,respectively,for Bejaad and Settat goundwaters.A decrease in the fluoride uptake with increasing the number of regeneration cycles was observed.