Bromide and iodide removal from waters under dynamic conditions by Ag-doped aerogels

The objective of this study was to analyze the efficiency of Ag-doped aerogels in the removal of bromide and iodide from water. To test the applicability of these aerogels in water treatment, adsorption of bromide and iodide was studied under dynamic conditions using waters from Lake Zurich and a mineral water. The results obtained by using these waters showed a high breakthrough volume (V0.02=0.4 LV0.02=0.4 L) of the columns, while the height of the mass transfer zone (HMTZ=6.8 cmHMTZ=6.8 cm) was low, regardless of the anion under study. Bromide- and iodide-saturated columns were regenerated with NH4OH. No change in the column characteristics was observed after two regeneration treatments, regardless of the type of water considered.

The results obtained after the aerogel regeneration process indicate its high efficiency, with a recovery of about 100% of the adsorptive capacity of the aerogel.Figure optionsDownload as PowerPoint slide