Adsorption and Recovery of Nonionic Surfactants by β-Cyclodextrin Polymer

✍ Scribed by Shoji Murai; Satoshi Imajo; Yasuyuki Maki; Keiko Takahashi; Kenjiro Hattori

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 97 KB
• Volume: 183
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0524

✦ Synopsis

In previous research, the removal of APE from aqueous Adsorption and recovery of nonionic surfactants (alkylphenol solution was investigated mainly using activated carbon or ethoxylate; APE) from aqueous solution was studied using bmineral clay (10-12). Usually the used activated carbon cyclodextrin polymer (bCD-P). A 150-ml aqueous solution conwas treated by a heat procedure or steam for recovery, and taining 200 ppm of APE and 1 g of bCD-P was shaken for 2 h therefore, it is difficult to reuse the materials adsorbed on in a batchwise test using a beaker. The results indicated that about the activated carbon.

85% of APE was adsorbed on bCD-P from aqueous solution and

With the view of making effective use of natural realso the adsorbed APE was released from bCD-P by shaking with sources, effluents have to be widely recycled for indusa mixture of water and various kinds of alcohols, such as methanol, trial use, and so a new system of recovering APE from ethanol, propanol, 2-propanol, and t-butanol. Regenerated bCD-P was reusable as an adsorbent. The APE recovery efficiency was water and recycling use of the adsorbent should be estabdependent on the ratio of the mixture of water and each alcohol. lished now.

Furthermore, the continuous recovery of APE was studied using

Cyclodextrin is a cyclic oligosugar and is harmless to a column charged with bCD-P at 25, 50, and 70ЊC, and also the humans and ecology. Also cyclodextrins and their derivaadsorption isotherms were obtained by observing the equilibrium tives include nonionic surfactants such as APE ( 13, 14 ) concentration and the amount of adsorbed APE at the same temor ionic surfactants ( 15 -19 ) in aqueous solution. A cycloperatures.