English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/199177
Share/Impact:
Statistics
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Wastewater treatment plant effluent inputs induce large biogeochemical changes during low flows in an intermittent streambut small changes in day-night patterns

AuthorsBernal, Susana ; Drummond, Jennifer D. ; Castelar, Sara ; Gacia, Esperança ; Ribot, Miquel ; Martí, Eugènia
KeywordsWastewater treatment plant
Intermittent stream
In-stream nutrient uptake
Nitrogen
Phosphorus
Day-night cycles
Issue Date2020
PublisherElsevier
CitationScience of the Total Environment 714 : 136733 (2020)
AbstractWastewater treatment plant (WWTP) effluents alter stream water chemistry and metabolic activity. Yet, essential aspects influencing the biogeochemical response of receiving streams such as hydrology and diel oscillations of light and temperature remain largely unexplored.We measured day vs night water chemistry and in-stream net nutrient uptake velocity (Vf) in an intermittent forested stream, upstream and downstreamof aWWTP effluent under contrasting hydrological conditions. TheWWTP effluent negatively influenced stream water chemistry, especially during the dry period. Despite large diel oscillations in light inputs, day-night differences in nutrient and oxygen concentrations were small, suggesting that heterotrophic respiration drove stream metabolism with a minor contribution of gross primary production. The magnitude of Vf was similar between day and night at the two reaches. Yet, at the downstream reach, in-stream net DIN uptake occurred more often at night, and values of Vf for ammonia and nitrite indicated enhanced in-stream nitrification. The two reaches showed a small capacity to retain DIN and soluble reactive phosphorus from the water column. Positive values of instream net nutrient uptake (i.e. uptake N release) occurred mostly during the dry period, highlighting that instreambiogeochemical processing can contribute to improvewater quality in streams receiving point-sources effluents in regions with low water availability.
DescriptionEste artículo contiene 10 páginas, 2 tablas, 5 figuras.
Publisher version (URL)https://doi.org/10.1016/j.scitotenv.2020.136733
URIhttp://hdl.handle.net/10261/199177
ISSN0048-9697
E-ISSN1879-1026
Appears in Collections:(CEAB) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.