Emerging polar pollutants in groundwater: Potential impact of urban stormwater infiltration practices
The quality of groundwater (GW) resources is decreasing partly due to chemical contaminations from a wide range of activities, such as industrial and agricultural enterprises and changes in land-use. In urban areas, one potential major pathway of GW contamination is associated with urban water manag...
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| Vydáno v: | Environmental pollution (1987) Ročník 266; číslo Pt 2; s. 115387 |
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| Hlavní autoři: | , , , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
Elsevier Ltd
01.11.2020
Elsevier |
| Témata: | |
| ISSN: | 0269-7491, 1873-6424, 1873-6424 |
| On-line přístup: | Získat plný text |
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| Shrnutí: | The quality of groundwater (GW) resources is decreasing partly due to chemical contaminations from a wide range of activities, such as industrial and agricultural enterprises and changes in land-use. In urban areas, one potential major pathway of GW contamination is associated with urban water management practices based on stormwater runoff infiltration systems (SIS). Data on the performance of the upper layer of soil and the unsaturated zone of infiltration basins to limit the contamination of GW by hydrophilic compounds are lacking. With this aim, the impact of infiltration practices on GW contamination was assessed for 12 pesticides and 4 pharmaceuticals selected according to their ecotoxicological relevance and their likelihood of being present in urban stormwater and GW. For this purpose, 3 campaigns were conducted at 4 SIS during storm events. For each campaign, passive samplers based on the use of Empore™ disk were deployed in GW wells upstream and downstream of SIS, as well as in the stormwater runoff entering the infiltration basins. Upstream and downstream GW contaminations were compared to evaluate the potential effect of SIS on GW contamination and possible relationships with stormwater runoff composition were examined. Our results showed two interesting opposite trends: (i) carbendazim, diuron, fluopyram, imidacloprid and lamotrigine had concentrations significantly increasing in GW impacted by infiltration, indicating a contribution of SIS to GW contamination, (ii) atrazine, simazine and 2 transformation products exhibited concentrations significantly decreasing with infiltration due to a probable dilution of historic GW contaminants with infiltrated stormwater runoff. The other 7 contaminants showed no general trend. This study demonstrates that passive samplers deployed in GW wells enabled the capture of emerging polar pollutants present at very low concentrations and allowed the assessment of infiltration practices on GW quality. New data on GW and urban stormwater are provided for poorly studied hazardous compounds.
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•Passive sampling was used to assess GW contamination by emerging polar pollutants.•The impact of infiltration practices on GW quality was studied.•Concentrations of 5 emerging pollutants were higher in GW impacted by infiltration.•Probable dilution of historic GW contaminants, like atrazine, was observed.•New data on little studied compounds such as bromacil and lamotrigine, are provided.
The fate of 16 polar and semi-polar pesticides and pharmaceuticals in groundwater upstream and downstream of stormwater infiltration systems (SIS) was studied. |
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| Bibliografie: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 0269-7491 1873-6424 1873-6424 |
| DOI: | 10.1016/j.envpol.2020.115387 |