Abstract
The main object of this study is to investigate the migration of Cu2+ during electro-osmotic consolidation. Application of a low-level electric field to a soil mass results in electro-osmotic and electro-migration flows, which further cause decrease in water content and migration of heavy metals. A kaolinite mixed with Cu(NO3)2 solution was used in this study. The pH, current, voltage gradient, concentration of Cu2+ in soil samples were measured, and the impact of voltage gradient was evaluated. The main transport mechanisms of heavy metals under electrical field include electro-osmosis and electro-migration. Due to the release of H+ and OH-, the soil became acidic near the anode and alkaline near the cathode. The experiment results indicated that Cu2+ migrated from the anode to cathode, however, the removal efficiency of Cu2+ was low due to the precipitation of Cu2+ near the cathode. The optimal voltage gradient was found to be 1V/cm for dewatering and 1.5V/cm for decontamination.
| Original language | English (US) |
|---|---|
| Pages | 3127-3130 |
| Number of pages | 4 |
| State | Published - 2017 |
| Event | 19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017 - Seoul, Korea, Republic of Duration: Sep 17 2017 → Sep 22 2017 |
Other
| Other | 19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017 |
|---|---|
| Country/Territory | Korea, Republic of |
| City | Seoul |
| Period | 9/17/17 → 9/22/17 |
All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology
Keywords
- Consolidation
- Copper
- Decontamination
- Electrokinetic