Degradation Products, Mineralization, and Toxicity Assessment of Pesticides Malathion and Fenitrothion
| Autor: | Dalibor M. Stanković, Marija V. Pergal, Branka Petković, Uroš Gašić, Igor D. Kodranov, Dragan Manojlović, Miodrag M. Pergal |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
LCOrbitrapMS 010501 environmental sciences LC-Orbitrap MS 01 natural sciences High-performance liquid chromatography Fenitrothion chemistry.chemical_compound GC-MS/MS Environmental Chemistry Organic matter 0105 earth and related environmental sciences Water Science and Technology chemistry.chemical_classification GC-MS/MS pathway Ecological Modeling Mineralization (soil science) Pesticide Pollution 6. Clean water River water chemistry 13. Climate action Environmental chemistry Pesticide degradation Malathion Degradation product and pathway Gas chromatography Organophosphorus pesticides degradation |
| Zdroj: | Water, Air, and Soil Pollution |
| Popis: | The aim of this study was to investigate, analyze, and compare applied techniques suitable for achieving efficient removal of organophosphorus pesticides (OPPs) (malathion and fenitrothion) from aqueous solutions and analyze the degradation products and processes. Pesticide degradation efficiency (%) was monitored by high-performance liquid chromatography (HPLC) equipped with a photodiode array detector (DAD), while mineralization degree was determined by total organic carbon analysis (TOC). Daphnia magna was used for screening the environmental safety aspects of the degradation methods, i.e., for assessing the toxicity of solutions obtained after degradation. Additionally, a surface river water was utilized to examine the likely influence of organic matter on the pesticides’ degradation. Pesticide degradation products were identified using gas chromatography with a triple quadrupole mass detector (GC-MS/MS) as well as ultrahigh-performance liquid chromatography coupled with a linear ion trap, Orbitrap mass spectrometer (UHPLC-LTQ Orbitrap MS), and a simple pesticide degradation mechanism is proposed. Removal of pesticides from water using chlorine dioxide was successful, resulting in high degradation efficiency (98% for malathion and 81% for fenitrothion). Partial mineralization was achieved, and Daphnia magna mortality decreased in the waters containing degradation products (compared with the parent pesticides), indicating that the solutions formed were less toxic than the parent pesticides. Lower degradation rates (80% for malathion and 72% for fenitrothion) in Sava River water were measured, indicating the influence of the organic matter contained in this naturally occurring surface water. The results prove that chlorine dioxide could be used as an agent for successful removal of these OPPs from water. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|