凹凸棒石对十八胺吸附的实验研究  

Adsorption performance of octadecylamine on attapulgite

作　　者：胡春联[1] 陈元涛[1] 张炜[1] 王平平[1] 王建[1] 

机构地区：[1]青海师范大学化学系,西宁810008

出　　处：《环境科学学报》2016年第4期1199-1204,共6页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.20967006);教育部"新世纪优秀人才"支持计划(No.NCET-07-0476)~~

摘　　要：利用天然凹凸棒石对难降解的十八胺进行吸附研究,并对天然凹凸棒石粘土结构和性质进行分析表征,重点研究了固液比、时间、p H值和温度对十八胺在凹凸棒石上吸附的影响.结果表明,十八胺在凹凸棒石上的吸附受p H和温度的影响明显,并且符合准二级动力学方程和Langmuir吸附等温线,由Langmuir吸附等温线(293 K)得出的饱和吸附容量为143.92 mg·g-1.凹凸棒石作为天然粘土有望成为处理十八胺的理想吸附材料.Herein,the process of adsorption of non-biodegradable octadecylamine by native attapulgite was studied. The structure and physi-chemical properties of attapulgite were characterized and the adsorption performance of octadecylamine was investigated under different material liquid ratio,time,p H and temperature conditions. The results show that the adsorption of octadecylamine on attapulgite is strongly dependent on p H and temperature,and the adsorption kinetics are fit for the Lagrange pseudo-second-order kinetic model and the Langmuir model. The adsorption capacity is 143. 92 mg·g-1at293 K from Langmuir model. The results reveal that the attapulgite can be a prospective sorbent for pre-concentration of octadecylamine from aqueous solutions in environment.

关 键 词：凹凸棒 吸附 十八胺 动力学 热力学 

分 类 号：X131.2[环境科学与工程—环境科学]