赤泥负载铈吸附剂对废水中氟的吸附性能研究  

STUDY ON THE ADSORPTION PROPERTY OF ADSORBENT OF CERIUM-LOADED RED MUD AGAINST FLUORIDE IN WASTEWATER

作　　者：马淞江[1] 罗道成[1] 

机构地区：[1]湖南科技大学化学化工学院,煤炭资源清洁利用与矿山环境保护湖南省重点实验室,湖南湘潭411201

出　　处：《水处理技术》2013年第1期50-54,共5页Technology of Water Treatment

基　　金：国家自然科学基金资助(50978098)

摘　　要：将赤泥通过盐酸活化,得到酸活化赤泥,以酸活化赤泥为载体,氧化铈为活性组分,制备了赤泥负载铈吸附剂,在25℃和静态条件下,对赤泥负载铈吸附剂处理含氟废水进行了研究。结果表明,赤泥负载铈吸附剂的制备条件为:盐酸浓度为6 mol/L,赤泥负载铈的反应时间为16 h,四水硫酸铈的质量浓度为0.4 g/L,焙烧温度为500℃;在废水pH为6.0,氟的质量浓度为40 mg/L,吸附时间为90 min,按氟与赤泥负载铈吸附剂质量比为1:100投加赤泥负载铈吸附剂进行处理,氟的去除率可达98%以上。利用Langmuir吸附等温式对吸附数据进行拟合,得到25℃下的线性方程为(ρe/qe)/(g.L-1)=[0.016 3ρe/(mg.L-1)]+0.050 3,线性相关性R2=0.992 3,吸附剂的饱和吸附量为61.35 mg/g。氟在吸附剂表面的吸附是单分子层吸附。The acid activated red mud was prepared after red mud was activated by hydrochloric acid.Adsorbent of cerium-loaded red mud was prepared with the acid activated red mud as a carrier,cerium oxide as an active component.Under the condition of 25 ℃ and static state,The treatment of wastewater containing fluoride with the adsorbent of cerium-loaded red mud was studied.The results showed that the preparation conditions of the adsorbent of ceriumoaded red mud were as follows：hydrochloric acid concentration 6 mol/L,reaction time of cerium-loaded red mud 16 h,cerium sulfate four water concentration 0.4 g/L and calcination temperature 500 ℃;the fluoride removing efficiency was above 98% at an adsorption time of 90min,from the wastewater with a pH of 6.0,fluoride concentration of 40 mg/L in the wastewater,and the fluoride mass ratio to the adsorbent of cerium-loaded red mud of 1：100.The adsorption process of the adsorbent of cerium-loaded red mud against the fluoride could be well fitted by Langmuir isotherm equation,its linear equation was（ρe/qe）/（g.L-1）=[0.016 3ρe/（mg.L-1）]＋0.050 3（R2=0.992 3）.The maximum adsorption capacity of fluoride was 61.35 mg/g at 25 ℃,and the adsorption was classified to monomolecular layer type.

关 键 词：赤泥 负载 铈 吸附剂 含氟废水 吸附等温线 

分 类 号：TQ424[化学工程]