盐交换凹凸棒黏土的理化性质及其对双氯芬酸钠吸附性能的影响

Effects of the ion-exchange on physicochemical of attapulgite clay and adsorption properties for diclofenac sodium

将凹凸棒黏土采用不同价态的硫酸盐和相同价态不同用量硫酸盐交换后,通过红外光谱、扫描电镜、比表面积和ζ电位的测定,考察了盐交换处理对凹凸棒黏土微结构和理化性能的影响。在此基础上,考察了处理凹凸棒黏土对双氯芬酸钠的吸附影响。结果表明,金属盐交换凹凸棒黏土对双氯芬酸钠的吸附量不仅与所交换金属离子的价态有关,更与凹凸棒黏土的微孔比表面积和微孔体积有关。当硫酸铝用量为凹凸棒黏土量的0.5%时,其交换凹凸棒黏土对双氯芬酸钠的吸附量最大,达到了126 mg/g,与凹凸棒黏土原矿相比,吸附量提高了近4倍。

Attapulgite clay were ion-exchanged with different valences sulfate and different amounts of sulfate in the same valence.The effects of the ion-exchanged on the microstructure and physicochemical properties of attapulgite clay were investigated by FTIR spectra,SEM,specific surface area and ζ potential.The adsorption properties of the ion-exchanged attapulgite clay for diclofenac sodium were studied.The results indicated that the adsorption capacity of modified attapulgite clay for diclofenac sodium was related with not only the valence of ion-exchanged metal ions but also the micropore area and micropore volume.When the amount of aluminum sulfate was 0.5% to that of attapulgite clay,the adsorption capacity of modified attapulgite for diclofenac sodium was the largest of 126 mg/g.Compared to that of nature attapulgite clay,the adsorption capacity of modified attapulgite for diclofenac sodium increased about four times.