Rapid separation of oil particles from low-concentrated O/W emulsions in the presence of anionic surfactants using fibrous slag.
Rapid separation of oil particles from low-concentrated O/W emulsions in the presence of anionic surfactants using fibrous slag.
复制标题
在阴离子表面活性剂存在下，使用纤维渣从低浓度 O/W 乳液中快速分离油颗粒。
DOI：
10.1006/jcis.2002.8445
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发表时间：
2002
影响因子：
9.9
通讯作者：
H. Sasaki
中科院分区：
文献类型：
--
作者：
Hitoshi Ito;H. Hayashi;H. Sasaki
从稳定的O/W乳状液中快速去除低浓度油一直是最困难的技术之一，迄今为止尚未建立有效的方法。我们的新技术，利用表面特性，应用的异质凝聚现象，是一个很好的替代分离胶体颗粒。研究了十二烷基硫酸钠（SDS）存在下，纤维状镍铁渣（FS）填充柱床快速分离正癸烷油滴的过程。在0 ~ 1.0 × 10（-4）M的SDS浓度范围内，考察了乳化正癸烷液滴的分离，并根据正癸烷液滴和捕收剂介质的电界面相互作用对结果进行了讨论。当SDS浓度为3.0 × 10（-5）M或更低时，正癸烷液滴被FS有效地收集，并且接近和已经沉积的油颗粒之间的聚结促进油收集。当SDS浓度高于3.0 × 10（-5）M时，正癸烷的捕集率随时间单调下降，表明正癸烷液滴附着在FS表面。这些实验结果与DLVO理论定性一致，并表明利用表面特性分离是一种很有前途的方法，用于回收稳定的乳化油滴。
Rapid removal of low-concentrated oil from stable O/W emulsions has been one of the most difficult techniques, and an effective method has not yet been established so far. Our novel technique using surface characteristics, the application of a heterocoagulation phenomenon, is a good alternative for separating colloidal particles. In this research, the rapid separation of n-decane oil droplets in the presence of sodium dodecyl sulfate (SDS) by a column bed packed with fibrous ferro-nickel slag (FS) was investigated. Separation of emulsified n-decane droplets was examined at SDS concentrations ranging from 0 to 1.0x10(-4) M, and the results were discussed in terms of electric interfacial interaction of both an n-decane droplet and a collector medium. When the SDS concentration was 3.0x10(-5) M or lower, n-decane droplets were efficiently collected by FS, and the coalescence between approaching and already-deposited oil particles promoted the oil collection. When the SDS concentration was higher than 3.0x10(-5) M, however, the n-decane collection ratio monotonically decreased with time, indicating that n-decane droplets attached to the FS surface. These experimental findings were in qualitative agreement with the DLVO theory and suggested that separation using surface characteristics is a promising method for the recovery of stable emulsified oil droplets.