Natural Geo-Filter Bed and Halophyte Wetland: An Eco-Engineering System to Mitigate Saline Highway Runoff Impacts

Galvez‐Cloutier, Rosa; Leroueil, Serge; Triffault-Bouchet, Gaëlle; Martel, L. M. V.; Morteau, B.

doi:10.2316/p.2010.699-042

Cited by 3 publications

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“…In last decades, the electrical conductivity in water of Saint-Augustin Lake highly increased, coincident with the use of de-icing road salts on Highway A40 [10]. With the aim to deal with salt pollution in runoff water, in 2011 an environmental management solution (hereafter named pilot site) was constructed [24].…”

Section: Site Descriptionmentioning

confidence: 99%

“…Moreover, halophyte plants were planted, such as Atriplex patula, Spergularia canadensis, and Salicornia europaea. Halophyte plants are an interesting alternative to plants traditionally used to treat the road effluents: (i) they are resistant to strong salinity; (ii) they can accumulate moderate to high quantities of salt in its biomass; and (iii) they can reduce the load of trace metals by bioaccumulation and biostabilisation [9,24].…”

Section: Pilot Site Characteristicmentioning

confidence: 99%

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Impacts of Salinity on Saint-Augustin Lake, Canada: Remediation Measures at Watershed Scale

Guesdon

Santiago-Martín

Raymond

et al. 2016

Water

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Abstract:Winter road network management is a source of anthropogenic salinity in the Saint-Augustin Lake watershed (Quebec City, QC, Canada). To prevent the potential impact caused by road runoff involving de-icing salts (NaCl) and trace metals (Cd and Pb) on the watershed, a full-scale treatment chain system (including a detention basin, a filtering bed, and a constructed wetland) was built. Average Cl and Na concentrations in groundwater were higher in wells affected by road network (125 mg/L Cl and 64 mg/L Na) than in control wells (13 mg/L Cl and 33 mg/L Na) suggesting a contamination by de-icing salts. The monitoring of influent and effluent surface water in the treatment system has shown a seasonal dependence in NaCl concentrations and electrical conductivity values, being the highest in summer, linked with the lower precipitation and higher temperature. Concentration ranges were as follows: 114-846 mg/L Na and 158-1757 mg/L Cl (summer) > 61-559 mg/L Na and 63-799 mg/L Cl (spring and autumn). The treatment system removal efficiency was significant, however with seasonal variations: 16%-20% Cl, 3%-25% Na, 7%-10% Cd and 7%-36% Pb. The treatment system has shown an interesting potential to mitigate the impact of anthropogenic salinity at watershed scale with higher expected performances in the subsequent years of operation.

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Section: Site Descriptionmentioning

confidence: 99%

Section: Pilot Site Characteristicmentioning

confidence: 99%

Impacts of Salinity on Saint-Augustin Lake, Canada: Remediation Measures at Watershed Scale

Guesdon

Santiago-Martín

Raymond

et al. 2016

Water

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Plants for Constructed Wetlands as an Ecological Engineering Alternative to Road Runoff Desalination

2016

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Phytodesalinization potential of Typha angustifolia, Juncus maritimus, and Eleocharis palustris for removal of de-icing salts from runoff water

Guesdon

Santiago-Martín

Galvez‐Cloutier

2016

Environ Sci Pollut Res

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Typha angustifolia, Juncus maritimus, and Eleocharis palustris were evaluated for de-icing salt removal from runoff water. Plants were exposed to a range of de-icing salt levels (0.2, 0.7, 4, 8, and 13 dS m(-1)) in laboratory-scale subsurface constructed wetlands (CWs) for 2 months under greenhouse conditions. Effluent characteristics, plant height, biomass, and Cl and Na removal rates and uptake were monitored. More water volume was retained in CWs of T. angustifolia (∼60 %) than of J. maritimus and E. palustris (∼37.5 %), which accounted for the electrical conductivity increase in effluents (1.3-1.9-fold). Based on the NaCl removal rate, T. angustifolia showed the greatest phytodesalinization ability (31-60 %) with the highest removal at the lowest salt levels (0.2-0.7 dS m(-1)), followed by J. maritimus (22-36 %) without differences in removal among levels, and E. palustris (3-26 %) presenting a removal rate highly decreased with increasing salt levels. Plant height and biomass were stimulated at low de-icing salt levels, but, at higher levels, T. angustifolia and E. palustris growth was inhibited (tolerance index ∼67 and 10 %, respectively, in the worst cases). Salt amounts in aboveground biomass in g m(-2) differed among levels and ranged as follows: 13.6-29.1 (Cl), 4.2-9.3 (Na; T. angustifolia); 7.0-12.0 (Cl), 2.7-6.4 (Na; J. maritimus); and 0.9-7.6 (Cl), 0.3-1.6 (Na; E. palustris). Chloride and Na translocation decreased with de-icing salt increase in T. angustifolia, while no significant differences were found in J. maritimus, which is interesting for harvesting purposes.

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Natural Geo-Filter Bed and Halophyte Wetland: An Eco-Engineering System to Mitigate Saline Highway Runoff Impacts

Cited by 3 publications

References 0 publications

Impacts of Salinity on Saint-Augustin Lake, Canada: Remediation Measures at Watershed Scale

Impacts of Salinity on Saint-Augustin Lake, Canada: Remediation Measures at Watershed Scale

Plants for Constructed Wetlands as an Ecological Engineering Alternative to Road Runoff Desalination

Phytodesalinization potential of Typha angustifolia, Juncus maritimus, and Eleocharis palustris for removal of de-icing salts from runoff water

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