Potential of vegetated ditches to manage organic pollutants derived from agricultural runoff and domestic sewage: A case study in Sinaloa (Mexico)
| Autor: | Seifeddine Jomaa, Rito Vega-Aviña, Francisco Delgado-Vargas, Otoniel Carranza-Diaz, Ursula Winkler, Steffi Schrader, Monika Moeder, Francisco Armando Chavez-Duran, Gabriela López-Angulo, Thorsten Reemtsma |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Typha domingensis 010504 meteorology & atmospheric sciences Ditch Sewage 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Environmental Chemistry Waste Management and Disposal Endosulfan 0105 earth and related environmental sciences Pollutant Hydrology geography geography.geographical_feature_category biology business.industry Pesticide biology.organism_classification Pollution chemistry Wastewater Environmental science Water quality business |
| Zdroj: | Science of The Total Environment. 598:1106-1115 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2017.04.149 |
| Popis: | This case study presents the fate of selected organic, priority and emerging pollutants along a 3.6km sector of a vegetated, agricultural ditch situated in Sinaloa (Mexico). The ditch receives runoff of agriculture and domestic wastewater from an adjacent community. During 2013, the occurrence of 38 organic pollutants (pesticides, polycyclic aromatic hydrocarbons (PAHs), artificial sweeteners and pharmaceutical residues) was monitored monthly at five selected points in the ditch water. Additionally, sediment and Typha domingensis (cattail) plants were collected in March, June, and September 2013 and investigated concerning their ability to absorb and accumulate pollutants. The concentrations of the selected pollutants in the ditch water ranged from sub ngL-1 (metolachlor, atrazine) to μgL-1 (metalaxyl, acesulfame). The metabolites endosulfan sulfate and endosulfan lactone exceeded mostly the concentration of the precursor insecticide endosulfan. Sorption on sediments was of minor relevance for accumulation of pollutants in the ditch system. Concentrations in the sediments varied seasonally and ranged from 0.2 to 12,432μgkg-1 dry weight (d.w.). T. domingensis accumulated ten of the studied pollutants mainly in roots (5-1065μgkg-1 d.w.). Overall, the monitoring results of the ditch compartments indicated that downstream the concentrations of the target pollutants decreased. Under no-flow conditions in the hot season, the ditch revealed a noticeable potential to mitigate pollutants. Among the high microbial activity in the water and the subtropical climate conditions, the ditch vegetation contributed to natural attenuation of the selected pollutants. |
| Databáze: | OpenAIRE |
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