铁氧化物陶瓷颗粒除氟效果及吸附特性研究  

Effect of Fluoride Removal by Iron Oxide Ceramic Materials

作　　者：朱迪瑞[1,2] 陈男[3,2] 和树庄[1] 赵莹[1,2] 陆轶峰[1,2] 

机构地区：[1]云南大学生命科学学院,云南昆明650091 [2]日本筑波大学生命环境科学学院,日本茨城3058572 [3]中国地质大学(北京)水资源与环境学院,北京100083

出　　处：《环境科学与技术》2011年第6期71-75,共5页Environmental Science & Technology

基　　金：中国“十一五”计划(2006BAJ08B04,2006BAD01B03);国家“863”计划(2007AA06Z351)

摘　　要：为了寻找一种新型的吸附材料处理含氟废水,研究采用了七水硫酸亚铁和三氧化二铁两种不同的铁氧化物陶瓷颗粒对含氟废水进行处理,实验对陶瓷颗粒的结构进行了电镜扫描（SEM）和比表面积（BET）的表征,探讨了陶瓷颗粒在吸附中的物理特征;在批实验中,探讨了陶瓷颗粒在吸附过程中不同pH、吸附剂量条件下的吸附表现,并对吸附等温线、动力学表现进行了研究。实验结果表明,在pH 2~11条件下以七水硫酸亚铁和三氧化二铁为组分的陶瓷材料的最大吸附效率分别为94.23%和60.48%。吸附率随着吸附剂投入量的增加而增加。对吸附等温线的研究表明,七水硫酸亚铁为组分的陶瓷颗粒同时具有表面与内孔径吸附,三氧化二铁为组分的陶瓷颗粒以内孔径吸附为主。对吸附动力学的研究表明两种材料同时存在化学吸附与物理吸附。Using two different kinds of oxide granular ceramics to remove fluoride in water,physical characteristics of materials were determined by SEM and BET.Effect and adsorption characteristics of these two ceramic materials were investigated by batch study.Experimental results indicated that under various pH of 2~11,the best adsorption capacity of ceramic materials which contains ferrous sulfate heptahydrate and ferric oxide was 94.23% and 60.48% respectively.Adsorption capacity of these two materials increased with the increase of adsorbent dosage.Adsorption isotherms indicated that material which contains ferrous sulfate heptahydrate has surface and intra-particle adsorption during the adsorption process,while the other material is only intra-particle adsorption.Adsorption kinetics indicated that both materials have physical adsorption and chemical adsorption.

关 键 词：铁氧化物陶瓷颗粒 吸附 吸附等温线 吸附动力学 

分 类 号：X703[环境科学与工程—环境工程]