Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions
Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions
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DOI：
10.1007/s00396-014-3463-x
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发表时间：
2015-02
影响因子：
2.4
通讯作者：
M. Beisebekov;S. B. Serikpayeva-;Sh. N. Zhumagalieva;M. K. Beisebekov;Z. Abilov;S. Kosmella-;J. Koetz
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文献类型：
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作者：
M. Beisebekov;S. B. Serikpayeva-;Sh. N. Zhumagalieva;M. K. Beisebekov;Z. Abilov;S. Kosmella-;J. Koetz
基于来自Manyrak存款（哈萨克斯坦共和国）的膨润土粘土和非离子聚合物的化学交联复合凝胶，即，聚（丙烯酸羟乙酯）和聚（丙烯酰胺）在单体预先嵌入膨润土的水悬浮液中之后原位聚合。低温扫描电子显微镜（cryo-scanning electron microscopy）结果表明，膨润土很好地嵌入到凝胶网络结构中，孔径可达1.5 μm。插层膨润土不仅可以吸附阳离子表面活性剂，还可以通过静电作用吸附重金属离子。电导率和表面张力的测量表明，不仅表面活性剂和重金属的水凝胶内的吸附，但也置换的临界胶束浓度（CMC）的表面活性剂。
Chemically cross-linked composite gels based on bentonite clay from Manyrak deposit (Kazakhstan Republic) and nonionic polymers, i.e., poly(hydroxyethylacrylate) and poly(acrylamide), were polymerized in situ after preliminary intercalation of monomers in an aqueous suspension of bentonite clay. By means of cryo-scanning electron microscopy, it was shown that bentonite clay is well incorporated into the gel network structure with pore sizes up to 1.5 μm. The intercalated bentonite clay can adsorb cationic surfactants as well as heavy metal ions due to electrostatic interactions. Conductometric and surface tension measurements indicate not only the adsorption of surfactants and heavy metals inside the hydrogel, but also the displacement of the critical micellization concentration (CMC) of the surfactants.