Abstract
To clarify the effect of peat and groundwater quality parameters on groundwater arsenic (As) contamination, As concentrations and the source of nitrogen (N) in groundwater and peat, and oxidation-reduction potential (ORP) and ammonium-N concentration of groundwater were compared between As-contaminated and uncontaminated areas in Bangladesh. Groundwater in the contaminated area had a reducing ORP with a high ammonium-N concentration, whereas groundwater in the uncontaminated area had a non-reducing ORP with a low ammonium-N concentration. Peat was present only in the contaminated area, whose As concentration was very high, indicating the critical role of peat in groundwater As contamination. The source of N in peat and groundwater was identified as chemical N fertilizer. N present in peat and groundwater served as a nutrient, enhancing microbial activity. In the reducing ORP condition, As was thought to be released intensively to groundwater by the mechanism of reductive release.
| Original language | English |
|---|---|
| Pages (from-to) | 165-172 |
| Number of pages | 8 |
| Journal | Water and Environment Journal |
| Volume | 28 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jun 2014 |
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Water Science and Technology
- Pollution
- Management, Monitoring, Policy and Law