Removal of phosphate ions from aqueous solution using Tunisian clays minerals and synthetic zeolite

作     者：Noureddine Hamdi Ezzeddine Srasra 

作者机构：National Center of Research in Materials SciencesBorj Cedria Technopole 95-2050Tunisia 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2012年第24卷第4期

页      面：617-623页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 

主　　题：phosphate adsorption clay mineral zeolite 

摘      要：Phosphate ions are usually considered to be responsible for the algal bloom in receiving water bodies and aesthetic problems in water. From the environmental point of view, the management of such contaminant and valuable resource is very important. The present work deals with the removal of phosphate ions from aqueous solutions using kaolinitic and smectic clay minerals and synthetic zeolite as adsorbent. The pH effect and adsorption kinetic were studied. It was found that phosphate could be efficiently removed at acidic pH （between 4 and 6） and the second order model of kinetics is more adopted for all samples. The isotherms of adsorption of phosphate ions by the two clays and the zeolite samples show that the zeolite has the highest rate of uptake （52.9 mg P/g）. Equilibrium data were well fitted with Langmuir and Freundlich isotherm.