Adsorption of sodium dodecyl sulfate on layered double hydroxides
Adsorption of sodium dodecyl sulfate on layered double hydroxides
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DOI：
10.1016/s1387-1811(98)00054-7
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发表时间：
1998-05-01
影响因子：
5.2
通讯作者：
Valim, JB
中科院分区：
文献类型：
--
作者：
Pavan, PC;Gomes, GD;Valim, JB
层状双氢氧化物（LDH）或所谓的阴离子粘土是类水滑石化合物，其可以由通式[M1-x2+Mx3+（OH）（2）]（x+）X-x/m（m-）表示。nH（2）O.它们可以用作吸附剂、催化剂和催化剂载体，并且它们呈现许多其他工业应用，例如聚合物稳定剂和阴离子交换剂。另一方面，表面活性剂已广泛应用于工业和家庭用途，因此它们构成了一类重要的具有商业利益的材料。表面活性剂在这些粘土上的吸附研究是非常重要的，因为这些吸附剂在许多工业过程中的潜在应用。所获得的结果与文献中发现的这种表面活性剂在其他固体上的吸附的结果吻合得很好。我们可以观察到，吸附遵循两步模型，证实了zeta电位测量。我们还观察到，吸附的表面活性剂的量随温度而增加。(C)1998 Elsevier Science B. V.保留所有权利。
Layered double hydroxides (LDH), or the so-called anionic clays, are hydrotalcite-like compounds which can be represented by the general formula [M1-x2+Mx3+(OH)(2)](x+) X-x/m(m-) . nH(2)O. They can be used as adsorbents, catalysts and catalyst supports and they present many other industrial applications such as polymer stabilisers and anion exchangers. On the other hand, the surfactants have been widely applied in industrial and household uses, so they constitute an important class of materials of commercial interest. The study of the adsorption of surfactants on these clays is thus very important due to the potential application of these adsorbents in many industrial processes.The adsorption of dodecyl sulfate on a magnesium aluminium layered double hydroxide was studied. The results obtained agree well with those found in the literature for the adsorption of this surfactant on other solids. We could observe that the adsorption follows the two-step model, confirmed by zeta potential measurements. We also observed that the amount of adsorbed surfactant increases with temperature. (C) 1998 Elsevier Science B.V. All rights reserved.