对辊处理对凹凸棒黏土理化性能和吸附性能的影响  

Effects of double roller treatment on physicochemical and adsorption properties of attapulgite clay

作　　者：颉晓玲[1] 汪琴[2] 王文波[2] 郑茂松[2] 

机构地区：[1]兰州大学第一医院,甘肃兰州730000 [2]中国科学院兰州化学物理研究所,甘肃兰州730000

出　　处：《应用化工》2012年第5期815-818,共4页Applied Chemical Industry

基　　金：中国科学院院地合作专项计划(DBNJ-2011-055);江苏省重大创新载体建设项目资助(BY2010012)

摘　　要：将凹凸棒黏土分别经1～5次对辊处理后,通过红外光谱、扫描电镜、比表面积和ζ电位的测定,考察了对辊次数对凹凸棒黏土微结构和理化性能的影响。在此基础上,考察了对辊处理凹凸棒黏土对双氯芬酸钠的吸附性能。结果表明,经过2次对辊处理后,凹凸棒黏土聚集体已经基本解离,比表面积增加趋势变缓,在蒸馏水中的ζ电位最小。对辊处理5次时,比表面积最大,但对双氯芬酸钠吸附容量却最小。结果表明,凹凸棒黏土的吸附性能不仅与比表面积有关,还与凹凸棒黏土的表面电荷及所吸附物质的极性有关。Attapulgite clay was treated by double roller for 1-5 times,respectively,and the effect of rolling times on the micro-structure and physicochemical properties of attapulgite clay was investigated through infrared spectroscopy,scanning electronic microscopy,specific surface area and ζ potential techniques.On this basis,the adsorption properties of the double rolled attapulgite clay for diclofenac sodium were evaluated.The results showed that the aggregation of attapulgite clay was basically dissociated,and the increasing trends of specific surface area becomes weaker,and the lowest ζ potential value in distilled water was observed,after rolling for 2 times.The attapulgite clay rolling for 5 times has the greatest specific surface area,but the lowest adsorption capacities for diclofenac sodium.This indicates that the adsorption capacities of attapulgite clay were not only related to its specific surface area,but also to its surface charges as well as the polarities of the adsorbed substance.

关 键 词：凹凸棒黏土 对辊 微结构 理化性能 吸附性能 

分 类 号：TQ424.24[化学工程]