Volume No. 4 Issue No.: 1 Page No.: 19-23 July-Sept 2009

 

PHYSICAL CHARACTERISTIC IMPROVEMENT OF BENTONITE BY PILLARING METHOD FOR ORGANIC COMPOUND REMOVAL

 

Jirawan Jampanil* and Thares Srisatit

Interdisciplinary Program of Environmental Science, Chulalongkorn University, Bangkok, (THAILAND)

 

Received on : July 11, 2009

 

ABSTRACT

 

The improvement of physical characteristic of bentonite to develop new adsorbent for organic compound removal by cation exchange properties of bentonite was investigated. Raw bentonites were pillared with tetraethyl ammonium chloride, TEA, equivalent to 0.75, 1.00, 1.25, 1.50, 1.75, and 2.00 times of bentonite CEC so that the pillared clay became more organophillic. The result showed that more surface area could be enhanced by pillaring method. After pillaring, bentonite’S Langmuir surface and micropore areas increased 26.27% or 145.12 m2/g and 70.17% or 40.78 m2/g, respectively. Considering the 1-day and 2-day aging time for pillaring, it’S found that BET, Langmuir surface areas and micropore area were not affected. Additionally, after replacing cation with TEA, CEC of bentonite was decreased from 67.5 meq/100 g to 37.3 meq/100 g with 44.7%. From this reason, it may imply that the pillared bentonite became higher organophilic or hydrophobic, which could be further applied for organic compound adsorption.

 

Keywords : Bentonite, Pillaring, Cation exchange capacity

 

 

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