کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5361246 | 1388271 | 2012 | 5 صفحه PDF | دانلود رایگان |
Large-pore-size (150 nm) polystyrene (PSt) microspheres were carboxylated with phthalic anhydride (PA) through Friedel-Crafts acetylation to study the adsorption of 2,4,6-trinitrotoluene (TNT) on this material from aqueous solution. The scanning electron microscope (SEM) images and mercury porosimetry measurements (MPM) of the microspheres showed that the pore structure was unchanged during the reaction. High adsorption capacity (11.2 mg gâ1 of suction-dried adsorbent) and adsorption rate (33.9 mg gâ1 hâ1) for TNT were observed during the study. As shown by the adsorption isotherm, the adsorption of TNT on PA-PSt can be described by the Freundlich adsorption equation, indicating heterogeneous adsorption process. On-column adsorption of TNT on PA-PSt and elution indicated that TNT can be completely removed from aqueous solution and condensed into acetone.
⺠Fast adsorption of TNT using PA-PSt. ⺠High adsorption capacity of PA-PSt for TNT. ⺠Completely remove TNT using PA-PSt column. ⺠Fast regeneration of PA-PSt with acetone.
Journal: Applied Surface Science - Volume 258, Issue 8, 1 February 2012, Pages 3624-3628