abstract
- Humic acid, which is one of the humic substances, plays an important role in the migration of hazardous chemicals and heavy metal ions in soil and groundwater. In this work, the migration of humic acid labeled with C-14 through silicate-packed columns was studied and the concentration profiles of the humic acid in the columns were observed. Using the sorption distribution coefficients of humic acid on silicate obtained by batch experiments, and assuming that the filtration coefficients of humic acid were identical to those of latex particles, we qualitatively simulated the concentration profiles of humic acid. This suggests that the model used in this work will be able to be used for predicting the environmental behavior of chemicals and heavy metals associated with humic acid through further improvement in future.