Characterization of natural- and organobentonite by XRD, SEM, FT-IR and thermal analysis techniques and its adsorption behaviour in aqueous solutions

Authors: Ikhtiyarova, G. A.; Özcan, A. S.; Gök, Ö.; Özcan, A.

Source: Clay Minerals, Volume 47, Number 1, March 2012 , pp. 31-44(14)

Publisher: Mineralogical Society

Buy & download fulltext article:

OR

Price: $14.82 plus tax (Refund Policy)

Abstract:

In this study, natural bentonite was modified with hexadecyltrimethylammonium (HDTMA) bromide to obtain organobentonite (HDTMA-bentonite). Bentonite and HDTMA-bentonite were then characterized using XRD, XRF, SEM, FT-IR, thermogravimetric (TG) analysis, elemental analysis and Brunauer-Emmett-Teller (BET) surface area techniques. The HDTMA+ cation was found to be located on the surface and enters the interlayer spaces of smectite according to the XRD and SEM results. FT-IR spectra indicated the existence of HDTMA functional groups on the bentonite surface. The BET surface area significantly decreased after the modification due to the coverage of the pores of natural bentonite. After the characterization, the adsorption of a textile dye, Reactive Blue 19 (RB19), onto bentonite and HDTMA-bentonite was investigated. The maximum adsorption capacity of HDTMA-bentonite for RB19 was 502 mg g−1at 20°C. The adsorption process followed a pseudo-second-order kinetic model and it was exothermic and physical in nature.

Keywords: ADSORPTION; BENTONITE; CHARACTERIZATION; MODIFICATION; ORGANOBENTONITE; REACTIVE DYE

Document Type: Research Article

DOI: http://dx.doi.org/10.1180/claymin.2012.047.1.31

Publication date: March 1, 2012

More about this publication?
Related content

Tools

Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page
UA-1313315-23