Adsorptive Removal of Fluoride from Aqueous Solution Using Modified Fly Ash

摘要：

In the present study, a new and low cost adsorbent for removal of fluoride from aqueous solution was prepared with fly ash and cerium chloride by i mpregnation-precipitation method. The effects of three parameters on the removal of fluoride, which are contact time, pH of the solution and the dose of modified fly ash were investigated. As a result, it was found that using modified fly ash as adsorbent to remove fl uoride from aqueous solution, the fluoride adsorption capacity was 1 .28 mg×g-1 at pH 4.0, 30 , contact time 6 h, the dosage of modified fly ash 16 g×L-1 and 50 mL fluoride solution with an initial fluoride concentration of 30 mg×L-1. The equilibrium data were fitted to the Freundlich isotherm model. It is observed that the adsorption capacity of modified fly ash increases significantly and the chemical activity of initial fly ash is excited by cerium oxide.

关键词： fly ash modify fluoride adsorption

作者: LI Caihong GAO Huimin LU Jun WANG Peipei

作者单位: Chemical Engineering College,Inner Mongolia University of Technology,Hohhot 010051,Inner Mongolia,China

会议类型: 国际会议

会议名称: 2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)

会议地点: 上海

会议语种:英文

页码: 2339-2344

在线出版日期: 2009-06-02（万方平台首次上网日期，不代表论文的发表时间）