Isotherm studies were conducted to evaluate the influence of pH and organics associated with algae on adsorption of the two musty odor compounds, 2-methylisoborneol and geosmin by three types of activated carbons (wood activated carbon: WAC, coal activated carbon: CAC, coconut shells activated carbon: YAC). Within a wide range of pH values (4.0, 7.0, 9.0), little influence on adsorption of the two musty odor compounds was observed. In the presence of organics, especially humic acids and glycolic acid, removal capacity and adsorption intensity of 2-MIB were significantly reduced comparing with those of geosmin in the three ACs. And the reduction magnitudes were greater in WAC and CAC than in YAC. However, little influence on those of geosmin was observed in all ACs. It was suggested that the organics such as glucose, mannose, especially humic acids and glycolic acid competed for the adsorption sites with 2-MIB, while their competition were quite low with geosmin.
- Activated carbon