Spatial variation of organochlorine pesticides and dissolved organic matter in urban closed lakes
| Autor: | Mirela Miclean, Cristian Ioja, Elfrida M. Carstea, Ana-Maria Popa, Erika Andrea Levei, Simona Dontu, Oana Cadar, Cristina Liana Popa, Maria-Alexandra Hoaghia |
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| Rok vydání: | 2019 |
| Předmět: |
Pollution
Geologic Sediments 010504 meteorology & atmospheric sciences media_common.quotation_subject 010501 environmental sciences 01 natural sciences Dredging Dissolved organic carbon Hydrocarbons Chlorinated Cities Pesticides 0105 earth and related environmental sciences media_common Pollutant Romania Sediment General Medicine Hydrogen-Ion Concentration Pesticide Lakes Environmental chemistry Environmental science Spatial variability Eutrophication Hexachlorocyclohexane Water Pollutants Chemical Environmental Monitoring Food Science |
| Zdroj: | Journal of Environmental Science and Health, Part B. 55:329-341 |
| ISSN: | 1532-4109 0360-1234 |
| DOI: | 10.1080/03601234.2019.1697141 |
| Popis: | Closed lakes located in urban parks act as sinks of organochlorine pesticides (OCPs), which have been used, for decades, as insecticides, herbicides and fungicides. The closed lakes from Bucharest, Romania, are periodically managed to prevent eutrophication and accumulation of pollutants. However, it is not known if these practices reduce or enhance the legacy pollution with OCPs. The aim of this study was to explore the spatial variation of OCPs in closed lakes. The total concentration of OCPs in water and sediments ranged between 0.0176 and 37.1 µg/L, and between 122 to 1,890 ng/g, respectively. The concentrations of OCPs were compared with the consensus-based sediment quality guidelines (SQGs) in order to evaluate the ecological risks of sediments. The highest potential adverse effects were associated with γ-HCH exposure. Periodical draining and dredging of lakes lead to the resuspension of contaminants, increasing pesticide bioavailability and accumulation in sediments. In addition, we observed that fluorescent dissolved organic matter (DOM) might influence the OCPs cycle. The quantity and character of fluorescent DOM can provide further insight into OCPs degradation. Also, this study may help urban planners to determine the state of urban waters and to find the best solution for water management. |
| Databáze: | OpenAIRE |
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