Carbon and hydrogen isotope analysis of parathion for characterizing its natural attenuation by hydrolysis at a contaminated site
| Autor: | Hans H. Richnow, DK Verma, Carsten Vogt, Anja Melvej, Morten Bondgaard, Sanjukta Subudhi, Langping Wu |
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| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Denmark chemistry.chemical_element Fractionation 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Hydrolysis Isotope fractionation Pesticides Groundwater Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering Isotope analysis Carbon Isotopes Parathion Ecological Modeling 010401 analytical chemistry Hydrogen-Ion Concentration Contamination Pollution 0104 chemical sciences Biodegradation Environmental chemistry Isotopes of carbon Environmental chemistry Carbon Water Pollutants Chemical Hydrogen |
| Zdroj: | Water Research. 143:146-154 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/j.watres.2018.06.039 |
| Popis: | The applicability of compound-specific isotope analysis (CSIA) for assessing in situ hydrolysis of parathion was investigated in a contaminated aquifer at a former pesticide wastes landfill site. Stable isotope analysis of parathion extracted from groundwater taken from different monitoring wells revealed a maximum enrichment in carbon isotope ratio of +4.9‰ compared to the source of parathion, providing evidence that in situ hydrolysis took place. Calculations based on the Rayleigh-equation approach indicated that the natural attenuation of parathion was up to 8.6% by hydrolysis under neutral and acidic conditions. In degradation experiments with aerobic and anaerobic parathion-degrading microbes, no carbon and hydrogen isotope fractionation of parathion were observed. For the first time, CSIA has been applied for the exclusive assessment of the hydrolysis of phosphorothioate-containing organophosphorus pesticides at a contaminated field site. |
| Databáze: | OpenAIRE |
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