Performance of a field-scale biological permeable reactive barrier for in-situ remediation of nitrate-contaminated groundwater
| Autor: | Hayley Devlin, Oriol Gibert, Robert M. Kalin, A. Assal, Trevor Elliot |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. R2EM - Resource Recovery and Environmental Management |
| Předmět: |
Environmental Engineering
Denitrification 010504 meteorology & atmospheric sciences In situ remediation education 010501 environmental sciences Nitrate 01 natural sciences Groundwater contamination Waste Disposal Fluid chemistry.chemical_compound Denitrifying bacteria Enginyeria química [Àrees temàtiques de la UPC] Groundwater -- Pollution Environmental Chemistry Waste Management and Disposal Groundwater Environmental Restoration and Remediation 0105 earth and related environmental sciences Permeable Reactive Barrier Nitrates In-situ remediation Pollution chemistry Permeable reactive barrier Environmental chemistry Aigües subterrànies -- Contaminació TA170 Environmental science Contaminated groundwater Water Pollutants Chemical Reactive material |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Gibert, O, Assal, A, Devlin, H, Elliot, T & Kalin, R M 2019, ' Performance of a field-scale biological permeable reactive barrier for in-situ remediation of nitrate-contaminated groundwater. ', Science of the Total Environment, vol. 659, pp. 211 . https://doi.org/10.1016/j.scitotenv.2018.12.340 UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| ISSN: | 1879-1026 |
| DOI: | 10.1016/j.scitotenv.2018.12.340 |
| Popis: | We report the performance of a field-scale permeable reactive barrier (PRB) for the biological treatment of nitrate-contaminated groundwater. The reactive material of the PRB consisted of a mixture of gravel and mulch as a carbon source for denitrifying bacteria. The PRB was equipped with a delivery system that allowed injecting NO3− at controlled rates from the surface directly into the up-gradient layer of the PRB. This way, NO3−concentration entering the PRB was varied (from1 to 530mg/L) with the purpose of evaluating the ultimateefficiency of the PRB under different NO3− loadings. The PRB was successful at removing NO3− from groundwater at inlet concentrations up to 280 mg/L (with NO3− removal percentages ≥97%).Monitoring of groundwater at differentdepths within the PRB provided evidence that NO3− underwent denitrification preferably at the deepest part of the PRB, where more favourable reducing conditions were achieved. Among the shortcomings of the PRB were the fluctuations of groundwater fluxes caused by intense rainfalls during the study period, although they generally did not pose concern for the denitrification capacity of the PRB. Emission fluxes of gases (CO2, CH4 and N2O) from the PRB to the atmosphere were also measured. The results are finally compared with thefew others reported existing PRBs for nitrate-contaminated groundwater worldwide. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|