Hybrid organic–inorganic derivatives of layered double hydroxides and dodecylbenzenesulfonate: Preparation and adsorption characteristics

Youwen You; Hongting Zhao; George F. Vance

doi:10.1039/B106811C

Youwen You,^a Hongting Zhao^b and George F. Vance*^a

* Corresponding authors

^a Soil and Environmental Chemistry Section, Department of Renewable Resources, University of Wyoming, Laramie, USA
E-mail: gfv@uwyo.edu
Fax: +1-307-766-6403
Tel: +1-307-766-2297

^b Department of Crop & Soil Sciences, Washington State University, Pullman, USA

Abstract

Layered double hydroxides (LDHs) are anionic clays that can be synthesized under laboratory conditions. In this study, different LDHs were synthesized by a coprecipitation method, with the parent products and calcined derivatives evaluated for their ability to adsorb the anionic surfactant, dodecylbenzenesulfonate (DBS). Adsorption isotherms for DBS retention on LDHs were typical L-type curves, with adsorption data conforming to a simple Langmuir equation. Langmuir maximum adsorption of DBS on calcined-LDH was significantly higher than that on uncalcined-LDHs. Organo-LDHs were also synthesized by incorporating DBS into LDHs via ion-exchange, reconstruction of calcined-LDH and in-situ synthesis methods. X-ray diffraction analysis of organo-LDHs revealed that DBS was intercalated into LDHs with the mono-layer DBS molecules oriented perpendicularly to LDH surfaces. Intercalation of DBS into LDHs decreased surface area according to BET analysis. The adsorption capacities of organo-LDHs for trichloroethylene (TCE) and tetrachloroethylene (PCE) were substantially greater than the original LDH materials. Adsorption of organic compounds by organo-LDHs was due to a partitioning mechanism.

Article information

https://doi.org/10.1039/B106811C

Article type

Paper

Submitted

27 Jul 2001

Accepted

14 Dec 2001

First published

22 Feb 2002

Download Citation

J. Mater. Chem., 2002,12, 907-912

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