Evapotranspiration of a willow cultivar (Salix miyabeana SX67) grown in a full-scale treatment wetland

Frédette, Chloé; Grebenshchykova, Zhanna; Comeau, Yves; Brisson, Jacques

doi:10.1016/j.ecoleng.2018.11.027

Cited by 27 publications

(28 citation statements)

References 40 publications

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“…These characteristics include their non-edibility, their high nitrogen absorption capacity as well as their ability to absorb certain metals such as cadmium (Aronsson and Perttu, 2001). Willows have been used for a multitude of environmental applications, such as municipal effluent treatment (Dimitriou and Aronsson, 2011;Guidi Nissim et al, 2015;Hasselgren, 1998;Holm and Heinsoo, 2013;Larsson et al, 2003;Perttu and Kowalik, 1997), biosolids treatment (Dimitriou and Aronsson, 2004), landfill leachate treatment (Aronsson et al, 2010;Dimitriou and Aronsson, 2010), polluted groundwater (Guidi Nissim et al, 2014) and effluent total evapotranspiration Gill, 2014, 2016;Frédette et al, 2019;Gregersen and Brix, 2001) for more than twenty years. In recent years, it has also been shown that the use of willow beds has an interesting potential for the treatment of wastewater (Grebenschykova et al, 2017, Khurelbaatar et al, 2017, complete evapotranspiration of effluent (Frédette et al, 2019) and nutrient recovery (Rastas Amofah et al, 2012) in cold climate.…”

Section: Introductionmentioning

confidence: 99%

Treatment and valorization of a primary municipal wastewater by a short rotation willow coppice vegetation filter

Lachapelle-T.

Labrecque²,

Comeau

2019

Ecological Engineering

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The objective of this study was to evaluate the treatment efficiency of a short rotation willow coppice (SRWC) vegetation filter for the treatment of wastewater from a municipal primary effluent in a humid continental climate context. The experimental work was carried out at pilot scale on a willow plantation located in Québec, Canada. The experimental design included nine plots that were irrigated with groundwater (L0 = 14 mm/d) or two primary effluents (L1 = 10 and L2 = 16 mm/d) for 111 days. This research showed that SRWCs operated on coarse-textured soils allow efficient removal of organic matter (91 % of COD for L1 and L2) and nitrogen (98 % of TKN for L1 and L2) from wastewater. It was also shown, in this case, that the total nitrogen loading should be used as the limiting design parameter to minimize the risk of contaminating underground drinking water sources with nitrates. Almost complete removal of total phosphorus was observed during this experiment (98 % for L1 and L2). However, a significant increase in soil available phosphorus was observed following the L2 treatment, which suggests an eventual phosphorus soil profile saturation in the event of continued wastewater irrigation. Avoiding such a saturation would require chemical phosphorus removal upstream of SRWC vegetation filters. Finally, an imbalance between irrigation and willows needs was observed as a result of irrigating plots at a constant hydraulic loading rate. Thus, irrigation of an SRWC with wastewater should be modulated according to willow seasonal transpiration trends to allow a better allocation of water and nutrients according to plant needs, and in doing so, increase treatment efficiency and resources valorization. Highlights • Efficient removal of OM and nitrogen (TKN) by coarse textured SRWC vegetation filter • TN should be used as the limiting design parameter of SRWC vegetation filter • Eventual P soil profile saturation in the event of continued wastewater irrigation • Irrigation should be modulated according to willow seasonal transpiration trends

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Section: Introductionmentioning

confidence: 99%

Treatment and valorization of a primary municipal wastewater by a short rotation willow coppice vegetation filter

Lachapelle-T.

Labrecque²,

Comeau

2019

Ecological Engineering

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“…Water supply has been identified as one of the most important driving factors of ET across willow species [38,41]. The data graciously shared by PÉTROMONT INC. allowed us to establish that the water table fluctuated mainly between depths of 0.6 to 1.3 m. Moreover, the experimental site was situated at less than 300 m from the St. Lawrence River.…”

Section: Convective Transport Of Dissolved Chemicals Towards the Rootmentioning

confidence: 99%

Willows Used for Phytoremediation Increased Organic Contaminant Concentrations in Soil Surface

Faubert

Desjardins²,

Hijri

et al. 2021

Applied Sciences

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The Salix genus includes shrub species that are widely used in phytoremediation and various other phytotechnologies due to their advantageous characteristics, such as a high evapotranspiration (ET) rate, in particular when cultivated in short rotation intensive culture (SRIC). Observations made in past field studies suggest that ET and its impact on soil hydrology can also lead to increases in soil pollutant concentrations near shrubs. To investigate this, sections of a mature willow plantation (seven years old) were cut to eliminate transpiration (Cut treatment). Soil concentrations of polychlorinated biphenyls (PCBs), aliphatic compounds C10–C50, polycyclic aromatic hydrocarbons (PAHs) and five trace elements (Cd, Cr, Cu, Ni and Zn) were compared between the Cut and the uncut plots (Salix miyabeana ‘SX61’). Over 24 months, the results clearly show that removal of the willow shrubs limited the contaminants’ increase in the soil surface, as observed for C10–C50 and of 10 PAHs under the Salix treatment. This finding strongly reinforces a hypothesis that SRIC of willows may facilitate the migration of contaminants towards their roots, thus increasing their concentration in the surrounding soil. Such a “pumping effect” in a high-density willow crop is a prominent characteristic specific to field studies that can lead to counterintuitive results. Although apparent increases of contaminant concentrations contradict the purification benefits usually pursued in phytoremediation, the possibility of active phytoextraction and rhizodegradation is not excluded. Moreover, increases of pollutant concentrations under shrubs following migration suggest that decreases would consequently occur at the source points. Some reflections on interpreting field work results are provided.

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“…However, since the last decades of the 20th century, this activity was progressively abandoned, leading to the rapid regeneration of riparian forests composed mainly of common alder (Alnus glutinosa) and willow (Salix atrocinerea). The expansion of tree-covered areas around the lagoons led to a decrease in water availability due to the large water volume extracted from the ground by these species due to evapotranspiration [29]. Finally, siltation has also been compounded by sediment contributions due to recurrent forest fires within the drainage basin of the lagoons, particularly in the Louro and Vixán areas.…”

Section: Evolution and Environmental Implications Of The Reduction Inmentioning

confidence: 99%

Trends in the Recent Evolution of Coastal Lagoons and Lakes in Galicia (NW Iberian Peninsula)

Fraga-Santiago

Gómez‐Pazo

Pérez‐Alberti

et al. 2019

JMSE

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Coastal lagoons are habitats of great environmental value. However, they are currently subject to major threats, particularly due to increasing sea levels. This study aims to identify changes—both natural and induced by anthropic activity—and their impact on the recent evolution of three different types of coastal lagoons in Galicia (Louro, Vixán, and Xuño). The application of information obtained through laser imaging detection and ranging (LiDAR) techniques suggests that the outer limits of the three lagoon systems have not experienced any relevant changes in the last 60 years (i.e., no occupation of the lagoon area has been identified). However, the internal configuration of these wetland areas has experienced some alterations. A generalized increase in the area occupied by macrophytic communities (Phragmites australis, Scirpus maritimus, Juncus maritimus, etc.) has been observed. Image interpretation by geographic information systems (GIS) and field surveys suggest that the area currently occupied by macrophytes experienced a 7% to 63% increase at the expense of the free water body. This loss of flooded area is consistent with the increase in sedimentation rates associated with the convergence of several causes, such as the abandonment of traditional macrophyte biomass harvesting and agricultural activities around the lagoons, the expansion of riparian forests, and sediment contributions by erosion due to recurrent forest fires within the drainage basins of each lagoon. Finally, water and sediment composition suggest that, of the three studied lagoons, two of them (Louro and Vixán) are included within the definition of “coastal lagoons” (habitat code 1150) by the Habitats Directive (Directive 92/43/EEC), while the Xuño lagoon should be considered a “natural eutrophic lake” (habitat code 3150).

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Evapotranspiration of a willow cultivar (Salix miyabeana SX67) grown in a full-scale treatment wetland

Abstract: Ce fichier a été téléchargé à partir de PolyPublie, le dépôt institutionnel de Polytechnique MontréalThis file has been downloaded from PolyPublie, the institutional repository of Polytechnique Montréal http://publications.polymtl.ca ManuscriptFrédette et al.

Cited by 27 publications

References 40 publications

Treatment and valorization of a primary municipal wastewater by a short rotation willow coppice vegetation filter

Treatment and valorization of a primary municipal wastewater by a short rotation willow coppice vegetation filter

Willows Used for Phytoremediation Increased Organic Contaminant Concentrations in Soil Surface

Trends in the Recent Evolution of Coastal Lagoons and Lakes in Galicia (NW Iberian Peninsula)

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