Abstract
Chromate is a commonly found groundwater contaminant. Permeable reactive barriers containing zero-valent iron as iron filings are able to remove the chromate by a combined reduction/precipitation reaction. However, due to the passivation of the reduction capability of the iron surfaces by the precipitation of chromate and other groundwater constituents, the barrier may have a limited capacity for chromate removal. By performing a column experiment with iron filings it was shown that the capacity was slightly lower at high chromate concentration (500 ppm) in comparison to low concentration (20 ppm). Mixing in sand had no significant enhancing effect on the removal capacity, in contrast to a pH adjustment of the groundwater to pH 4, which significantly increased the removal capacity.
| Original language | English |
|---|---|
| Title of host publication | Groundwater Quality 2001 : Natural and Enhanced Restoration of Groundwater Pollution. Selected papers |
| Editors | S. Thornton, S. Oswald |
| Place of Publication | Oxfordshire, UK |
| Publisher | IAHS Press |
| Publication date | 2002 |
| Pages | 409-414 |
| Publication status | Published - 2002 |
| Event | 3rd International Conference on Groundwater Quality - University of Sheffield, Sheffield, United Kingdom Duration: 18 Jun 2001 → 21 Jun 2001 Conference number: 3 |
Conference
| Conference | 3rd International Conference on Groundwater Quality |
|---|---|
| Number | 3 |
| Location | University of Sheffield |
| Country/Territory | United Kingdom |
| City | Sheffield |
| Period | 18/06/2001 → 21/06/2001 |
| Series | IAHS Publication |
|---|---|
| Number | 275 |
Keywords
- passivation
- heavy metal
- column experiment
- reduction
- chromium