Organochlorine pesticides and dissolved organic matter within a system of urban exorheic lakes
| Autor: | Ana Maria Popa, Cristina Liana Popa, Simona Dontu, Oana Cadar, Mirela Miclean, Erika Andrea Levei, Cristian Ioja, Elfrida M. Carstea |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
China
Geologic Sediments 010504 meteorology & atmospheric sciences 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Ecosystem services Rivers Environmental protection parasitic diseases Dissolved organic carbon Hydrocarbons Chlorinated Humans Organic matter Cities Pesticides Ecosystem 0105 earth and related environmental sciences General Environmental Science Pollutant chemistry.chemical_classification Sediment General Medicine Pollution Lakes Biodegradation Environmental Wastewater chemistry Environmental science Water quality Surface runoff Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental Monitoring and Assessment. 192 |
| ISSN: | 1573-2959 0167-6369 |
| DOI: | 10.1007/s10661-019-8003-1 |
| Popis: | Urban lakes represent the most extensive water bodies in cities and provide blue ecosystem services, by retaining pollutants, offering cultural services, and mitigating climate change. Human activities threaten to decrease the supply of ecosystem services associated with urban lakes. Exorheic lakes play an essential role in reducing and changing the characteristics of pollutants and organic matter along the environmental continuum. This study aims to gain further understanding on the distribution and fate of organochlorine pesticides (OCPs) in relation to fluorescent dissolved organic matter (DOM) within an exorheic lake system, located along Colentina river, Bucharest. Results indicated a historical usage of HCHs, which were present in lake water and sediment samples, in concentrations exceeding the regulatory limits, with potential eco-toxicity on aquatic biota. Decades of intense applications along the river, before OCPs ban, led to their accumulation in sediments and their re-mobilization, each year, after the lakes were drained, dredged, and refilled. Fluorescence measurements revealed that DOM accumulated in certain lakes due to wastewater discharges, and surface runoff, but decreased towards the end of the exorheic lakes through dilution, sedimentation, and biodegradation. The results also showed that fluorescent DOM may have a substantial impact on OCPs cycle in urban lakes and may help to determine the conditions and effectiveness of removing OCPs from water and sediments. These issues contribute to the decrease of ecosystem services supply associated with urban lakes, having multiple hidden consequences on the urban environment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink