| 초록 |
Bentonite was organically modified by using amine cation such as Hexadecyltrimethylammonium(HDTMA), Dodecyltrimethylammonium(DDTMA) and Tetramethylammonium(TMA) to enhanced removal capacity of organic phenol contaminants dissolved in aqueous solution. This modification produced a change of the surface property of bentonite from hydrophilic to organophilic. The individual adsorption of three amine cation were performed in batch reactor to investigate their uptake behaviors on bentonite surfaces at 25℃. Among the three amine cations, HDTMA showed the strongest adsorption in terms of monolayer capacity and adsorptive strength. These adsorption isotherms were well presented by the Langmuir and the Toth models. The removal of toxic organic phenols such as 2-chlorophenol was subsequently achieved by incorporating the modified bentonite. The sorption capacity of modified bentonite for the phenol contaminants has been significantly enhanced.
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