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Adsorption and Recovery of Ionic Surfactants by β-Cyclodextrin Polymer

✍ Scribed by Shoji Murai; Satoshi Imajo; Hiroaki Inumaru; Keiko Takahashi; Kenjiro Hattori

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
65 KB
Volume
190
Category
Article
ISSN
0021-9797

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✦ Synopsis

The adsorption and recovery of ionic surfactants, such as dodecylbenzenesulfonic acid (DBS) and benzalkonium chloride (BKC), from an aqueous solution were studied using the beta-cyclodextrin polymer (beta-CDP). BKC always demonstrated a higher adsorption efficiency than DBS in batch tests, isotherms, and column tests. The adsorption characteristics of the surfactants seemed to be caused by inclusion into beta-CD, and they were easily determined using the Langmuir adsorption isotherm. Furthermore, the surfactants adsorbed by beta-CDP were easily released by shaking it with a mixture of water and methanol. Recovery efficiency was dependent on the mixture ratio of the solvent, and regenerated beta-CDP was reusable as an adsorbent.

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