Effect Factors and Adsorption Behavior of Granular Iron-oxide-zeolite in the Removal of Fluoride from Aqueous Solution
In this study,a granular iron-oxide-zeolite (GIOZ) was successfully prepared using the uniform hydrolysis method.Effect factors and adsorption behavior of GIOZ were investigated by a series of batch experiments.The effects of adsorbent dosage,contact time,pH,initial concentration and the co-existing ions on the removal of fluoride were studied.In order to study the sorption isotherm,two equilibrium models,the Freundlich and Langmuir isotherms,were analyzed.The result showed that more than 80% removal of fluoride was achieved within 40 min from a 20 g/L solution with pH at 5~6.XRD spectra of adsorbent before and after exposure to fluoride ions suggested that a new chemical bond formed on surface of GIOZ and fluoride was effectively removed by the chemical adsorption.It is concluded that the reclaimed GIOZ can be considered as a feasible and economical adsorbent for fluoride removal.
Granular iron-oxide-zeolite Fluoride Removal Regeneration Adsorption isotherms
Zichun Yan Yanjuan Li
School of Environmental & Municipal Engineering Lanzhou Jiaotong University Lanzhou,730070,China;Col School of Environmental & Municipal Engineering Lanzhou Jiaotong University Lanzhou,730070,China
国际会议
兰州
英文
1-4
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）