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The aim of the present study was to investigate the removal efficiency of oleic acid from aqueous solutions by thermally expanded and hydrophobized vermiculites. The expansion of the samples was carried out in a furnace at 1000°C for 2min. The hydrophobization using polymethyl-hydro-siloxane as hydrophobing derivatizing reagent was performed by immersion and hydrophobizing atmosphere methods. The...
The aim of the present study was to investigate the effect of thermal expansion on the removal efficiency of commercial vermiculites towards Ni2+ ion from aqueous solutions. Three effects were studied: 1) Contact time between the adsorbent and Ni2+ dissolved in the retention process; 2) adsorbent mass; 3) concentration of Ni2+ in adsorption. Ni2+ uptake was quantitatively evaluated using the Langmuir,...
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