Single-solute batch experiments were conducted in ultrapure water to identify
the characteristics of high-silica zeolites that are most suitable for the adsorptive removal
of MIB and geosmin. In addition, the effectiveness of zeolites was compared to one coal-based
and one coconut-shell-based activated carbon. Among the tested high-silica
zeolites, adsorbents of the mordenite framework type exhibited the largest MIB
adsorption capacity while both mordenite and Y zeolites were effective for geosmin
adsorption. Adsorption capacities of the tested high-silica zeolites were smaller than
those of the tested activated carbons in ultrapure water for both MIB and geosmin. With
respect to zeolite hydrophobicity, results for both MIB and geosmin showed that
adsorption capacities increased as the SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio (hydrophobicity) increased from
20 to 90 while a further increase in SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio did not enhance MIB and geosmin
adsorption capacities. Also, differences between 14C removal in experiments conducted
with 14C-labelled MIB and 12C-MIB removal suggest that MIB may be removed by a
reactive mechanism on some zeolites. Includes 4 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 200 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 11/01/2007 |
