不同铝盐改性人工合成菱铁矿除氟性能研究  

Fluoride Removal by Synthetic Siderite Modified by Different Aluminum Chemicals

作　　者：单悦[1] 郭华明[1] 刘琼[1] 

机构地区：[1]中国地质大学水资源与环境学院,北京100083

出　　处：《安全与环境工程》2011年第3期22-27,共6页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(40872160);国家水体污染控制与治理科技重大专项(2009ZX07425-006);"十一五"国家科技支撑计划重点项目(2006BAJ08B04)

摘　　要：高氟地下水和地方性氟中毒已经成为世界范围内的一大问题,国内外对如何去除水中氟进行了大量的研究。本文利用硫酸铝溶液、活性氧化铝悬浮液和活性氧化铝粉末分别对人工合成菱铁矿进行了改性,采用静态吸附试验研究了不同改性材料的除氟容量、吸附反应后溶液中铁和铝离子浓度,并对改性效果较好的硫酸铝改性人造菱铁矿的除氟动力学进行了探讨,结果表明:硫酸铝溶液改性人工合成菱铁矿的最佳静态除氟容量和除氟率分别为0.486 mg/g和97.12%,是活性氧化铝改性吸附剂除氟容量的1.25倍;经硫酸铝溶液改性人工合成菱铁矿处理后的含氟废水,铝含量符合国家卫生饮用水标准;硫酸铝溶液改性人工合成菱铁矿对氟离子吸附符合Lager-gren二级动力学模型。High fluoride in groundwater is one of the worldwide environmental problems,and has caused various kinds of fluorosis.Many studies have been carried out for the removal of fluoride from water.In this investigation,synthetic siderite（SS） was modified by using aluminum sulfate solution,activated alumina（AA） suspension and activated alumina particles for fluoride removal.Adsorption capacities of various modified materials and concentrations of Fe and Al after adsorption were investigated by means of batch experiments.Adsorption kinetics of aluminum sulfate-activated material was assessed.Results demonstrated that the optimal adsorption capacity of aluminum sulphate-modified SS and removal efficiency were 0.486 mg·g-1 and 97.12% respectively,1.25 times as much as that of AA-modified SS.When fluoride-containing water was treated with aluminum sulfate-modified SS,the concentration of aluminum was within the guideline of drinking water standard.The pseudo-second-order model could be used to simulate the adsorption of fluoride on aluminum sulphate-modified SS effectively.

关 键 词：硫酸铝 改性 人工合成菱铁矿 高氟水 吸附 

分 类 号：X52[环境科学与工程—环境工程]