凹凸棒石吸附地下水中的Fe3+研究  

Adsorption of Fe3+ from groundwater by using palygorskite

作　　者：赵金秋[1] 韩丽丽[1] 马福英[1] 张秀丽[1] 

机构地区：[1]中国地质大学材料科学与工程学院

出　　处：《实验技术与管理》2010年第8期56-59,共4页Experimental Technology and Management

摘　　要：凹凸棒石是一种含水,富镁、富铝的硅酸盐黏土矿物,由相互平行的硅氧四面体双链组成,比表面积大,具有良好的吸附性能。通过静态实验,探讨了凹凸棒石吸附水中Fe3＋时的影响因素。结果表明,在Fe3＋浓度为20.00mg/L时,使用2.00g凹凸棒石、水浴温度为30℃、初始pH值为4至5、吸附40min后对水中Fe3＋的去除率最大。另外,研究表明,Fe3＋去除率随吸附时间的增加呈曲线变化,随凹凸棒石样品的用量的增加有所增加,随pH的增加明显增加,随着温度升高影响不大。根据吸附等温线知,凹凸棒石吸附Fe3＋的规律较好地满足Langmuir吸附等温式。Palygorskite is a silicate clay mineral which has rich magnesium,and aluminum,by the parallel composition of siliconoxygen tetrahedron duplexes,specific surface area,and has good adsorption properties.This paper discusses the factors of Fe3＋adsorption by the static experiments.The results show when the concentration of Fe3＋solution is 20.00mg.L-1,using 2.00grams of palygorskite,bathing 30℃of water tem-perature,having 4～5of initial pH value,oscillating of 40minutes,the maximum removal rate of Fe3＋from water is the largest.In addition,the study shows that removal rate of Fe3＋showed a curvilinear shape when the adsorption time increased,increased with the amount of palygorskite increased,increased with the increase of pH,and had little effect with the increase of temperature.According to known adsorption isotherms,paly-gorskite’s adsorption of Fe3＋can well meet the law of Langmuir adsorption isotherm.

关 键 词：凹凸棒石 吸附 铁离子 

分 类 号：TB383[一般工业技术—材料科学与工程]