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Enhancement of carbon and nitrogen removal by helophytes along subsurface water flowpaths receiving treated wastewater.
Ribot, Miquel; Bernal, Susana; Nikolakopoulou, Myrto; Vaessen, Timothy N; Cochero, Joaquín; Gacia, Esperança; Sorolla, Albert; Argerich, Alba; Sabater, Francesc; Isnard, Manel; Martí, Eugènia.
Afiliación
  • Ribot M; Freshwater Integrative Ecology Group, Centre d'Estudis Avançats de Blanes (CEAB-CSIC), Blanes, Spain. Electronic address: mribot@ceab.csic.es.
  • Bernal S; Freshwater Integrative Ecology Group, Centre d'Estudis Avançats de Blanes (CEAB-CSIC), Blanes, Spain; Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA), Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain. Electronic address: sbernal@ceab.csic.es.
  • Nikolakopoulou M; Naturalea, Castellar del Vallès, Spain; Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA), Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain. Electronic address: mnikolakopo@gmail.com.
  • Vaessen TN; Freshwater Integrative Ecology Group, Centre d'Estudis Avançats de Blanes (CEAB-CSIC), Blanes, Spain. Electronic address: t.n.vaessen@ceab.csic.es.
  • Cochero J; ILPLA - Instituto de Limnología Dr. Raúl A. Ringuelet, La Plata, Argentina. Electronic address: jcochero@ilpla.edu.ar.
  • Gacia E; Freshwater Integrative Ecology Group, Centre d'Estudis Avançats de Blanes (CEAB-CSIC), Blanes, Spain. Electronic address: gacia@ceab.csic.es.
  • Sorolla A; Naturalea, Castellar del Vallès, Spain. Electronic address: albertsorolla@naturalea.eu.
  • Argerich A; School of Natural Resources, University of Missouri, Columbia, MO 65211, United States; Department of Forest Engineering, Resources and Management, College of Forestry, Oregon State University, Corvallis, OR 97331, United States. Electronic address: Alba.Argerich@oregonstate.edu.
  • Sabater F; Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals (BEECA), Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain. Electronic address: fsabater@ub.edu.
  • Isnard M; Consorci Besòs-Tordera, Granollers, Spain. Electronic address: misnard@besos-tordera.cat.
  • Martí E; Freshwater Integrative Ecology Group, Centre d'Estudis Avançats de Blanes (CEAB-CSIC), Blanes, Spain. Electronic address: eugenia@ceab.csic.es.
Sci Total Environ ; 599-600: 1667-1676, 2017 Dec 01.
Article en En | MEDLINE | ID: mdl-28535595
ABSTRACT
Wastewater treatment plant (WWTP) effluents are sources of dissolved organic carbon (DOC) and inorganic nitrogen (DIN) to receiving streams, which can eventually become saturated by excess of DIN. Aquatic plants (i.e., helophytes) can modify subsurface water flowpaths as well as assimilate nutrients and enhance microbial activity in the rhizosphere, yet their ability to increase DIN transformation and removal in WWTP-influenced streams is poorly understood. We examined the influence of helophytes on DIN removal along subsurface water flowpaths and how this was associated with DOC removal and labile C availability. To do so, we used a set of 12 flow-through flumes fed with water from a WWTP effluent. The flumes contained solely sediments or sediments with helophytes. Presence of helophytes in the flumes enhanced both DIN and DOC removal. Experimental addition of a labile C source into the flumes resulted in a high removal of the added C within the first meter of the flumes. Yet, no concomitant increases in DIN removal were observed. Moreover, results from laboratory assays showed significant increases in the potential denitrifying enzyme activity of sediment biofilms from the flumes when labile C was added; suggesting denitrification was limited by C quality. Together these results suggest that lack of DIN removal response to the labile C addition in flumes was likely because potential increases in denitrification by biofilms from sediments were counterbalanced by high rates of mineralization of dissolved organic matter. Our results highlight that helophytes can enhance DIN removal in streams receiving inputs from WWTP effluents; and thus, they can become a relevant bioremediation tool in WWTP-influenced streams. However, results also suggest that the quality of DOC from the WWTP effluent can influence the N removal capacity of these systems.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2017 Tipo del documento: Article

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Total Environ Año: 2017 Tipo del documento: Article