The efficiency of free-floating and emergent aquatic macrophytes in constructed wetlands for the treatment of a fishpond effluent

Osti, João Alexandre Saviolo; Henares, Matheus Nicolino Peixoto; Camargo, Antonio Fernando Monteiro

doi:10.1111/are.13813

Cited by 18 publications

(17 citation statements)

References 43 publications

(52 reference statements)

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“…Consequently, the efficiency of the wetland system in phytoremediation and/or the competence of the macrophytes can be affected by different climatic conditions, soil type or aquatic biodiversity [25]. Both natural and constructed wetlands are worldwide considered as a cost-effective and an alternative technology for polluted water and wastewater treatment, they have been increasingly used to successfully remove pollutants from domestic and industrial effluents [11,14,26,27]. Macrophytes used in phytoremediation in CW systems can diverge to various types based on their adaptations to life in water.…”

Section: Natural and Constructed Wetlands In Phytoremediationmentioning

confidence: 99%

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Phytoremediation of Lebanese polluted waters: a review of current initiatives

2019

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Water pollution is presently considered as a serious apprehension in Lebanon. Heavy contamination load of nutrients, heavy metals and organic pollutants can be highly harmful for human health and detrimental to aquatic life and ecosystems. Phytoremediation in natural and constructed wetlands using aquatic macrophytes present a sustainable plant-based technology recognized as a very efficient option in water treatment. The employment of species such as Phragmites, Sparganium, Lemna sp and other aquatic macrophytes not only helps in pollution cleanup but also conserves aquatic communities. To date, two pilot constructed wetlands, Litani River and Bcharreh have been established in Lebanon. These promising initiatives have been, however, accompanied with very limited research studies to examine the role of utilized plants and their efficiency in the remediation process. This paper presents an overview of the status of these initiatives and phytoremediation potential in Lebanon.

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Section: Natural and Constructed Wetlands In Phytoremediationmentioning

confidence: 99%

“…Floating plants include free floating and floating-leaved plants such as Eichhornia crassipes, Lemna sp, and Azolla sp. [24,27,29]. Wetland plants can take up heavy metals and nutrients through root systems and accumulate them in the biomass reducing therefore the concentrations of these polluting elements.…”

Section: Macrophytes For Phytoremediationmentioning

confidence: 99%

Phytoremediation of Lebanese polluted waters: a review of current initiatives

2019

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“…Different studies have demonstrated that managed cattail in constructed wetlands could provide bene cial ecosystem services (6,7) and sustainable biomass for biofuel feedstocks (13,14) and bioproducts (15).…”

Section: Introductionmentioning

confidence: 99%

Application of the thermal time model for different Typha domingensis populations

León

Cortijo

Izquierdo

et al. 2020

Preprint

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Background: Cattail (Typha domingensis Pers.) is a perennial emergent plant which is used in Green Floating Filters (GFFs), one of the most innovative systems of wastewater treatment to bioremediate eutrophic waters and produce biomass as biofuel feedstocks. The establishment of cattails in GFFs depends on the seed germination and plant responses under conditions of a new habitat. This study analysed the germination responses of four different populations of cattails through a thermal time model to know their basic parameters of germination and which population would be more adapted to the conditions tested.Results: Seeds from the Badajoz (Ba), Cuenca (Cu), Madrid (Ma), Seville (Se) and Toledo (To) populations were exposed to different thermal regimes (constant, and alternating temperatures between 15 and 30°C) and different darkness treatments (between 0 and 20 days with 24h dark photoperiod, then exposed to light with 12h light/dark photoperiod) to determine the parameters of the thermal model from germination levels in each treatment. To population was used to validate the thermal time parameters of other populations. Regardless of the other parameters, no germination occurred in total darkness. The mean value of base temperature (Tb) was 16.4±0.2°C in all treatments. Optimum temperature (To) values in Ma and Ba were 25°C, and those in Cu and Se were 22.5°C. The germination response decreased when the temperature approached Tb and increased when it was close to To. In comparison to alternating temperatures, constant temperatures had the highest germination response and lowest thermal time (θT(50)). Darkness treatments had a direct relationship with θT(50). The population origin also affected seed germination; Cu had the highest values of To and germination response but had a lower θT(50), which coincides with the lowest mean ambient temperatures. Conclusion : According to these results, the germination response of cattails was high in all populations under optimal conditions but was affected to a greater or lesser extent depending on thermal regimes, darkness treatments, and populations. The thermal time model allowed us to determine that To was between 22.5-25ºC and that Cu is the best population regarding the germination response under the conditions tested.

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“…Although considered an invasive plant, cattail provides different raw materials (weaving) and serves as food for humans and livestock (rhizomes). In recent years, cattail has been used in wastewater treatments and industrial-site remediation due to its great capacity to remove particle matter, nutrients and metals from eutrophic waters (6)(7)(8). For wastewater treatment, this species has been used to form green filters that use different types of biological elements (plants and microorganisms).…”

Section: Introductionmentioning

confidence: 99%

Application of the thermal time model for different Typha domingensis populations

León

Cortijo

Izquierdo

et al. 2020

Preprint

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BackgroundTypha domingensis Pers. is a perennial emergent plant that in comparison to other Typha species, produces more biomass. This species is used in Green Floating Filters (GFFs), one of the most innovative systems of wastewater treatment to bioremediate eutrophic waters and produce biomass as biofuel feedstocks. The establishment of a GFF depends on the seed germination and plant responses under conditions of a new habitat. This study analysed the germination response of four different populations of T. domingensis through a thermal time model to determine which population would have the fastest germination for establishment in a GFF.ResultsSeeds from the Badajoz (Ba), Cuenca (Cu), Madrid (Ma) and Seville (Se) populations were exposed to different thermal regimes (constant and alternating temperatures between 15 and 30°C) and photoperiods (0, 3, 5, 7,10 and 20 days in darkness) to determine the parameters of the thermal model. Regardless of other parameters, no germination occurred in total darkness (20 days). The mean value of the base temperature (Tb) was 16.4±0.2°C in all treatments. The optimum temperature (To) values in Ma and Ba were 25°C, and those in Cu and Se were 22.5°C. The germination response decreased when the temperature approached Tb and increased when it was close to To. In comparison to temperatures with a ΔT= 5°C or 10°C, those with a ΔT= 15°C or ΔT= 0°C had the highest germination response and lowest thermal time (θT(50)). The photoperiod had a relationship with θT(50), but it was not proportional. The populations also affected germination; Cu had the highest values of To and germination response but had a lower θT(50). which coincides with the lowest mean ambient temperatures.Conclusion According to these results, the germination response of T. domingensis under optimal conditions was high in all populations but was affected to a greater or lesser extent depending on thermal regimes, photoperiods, and population. The thermal time model allowed us to determine that in comparison to other populations, Cu is the best population for establishment in a GFF due to its high germination response under the conditions tested.

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The efficiency of free-floating and emergent aquatic macrophytes in constructed wetlands for the treatment of a fishpond effluent

Cited by 18 publications

References 43 publications

Phytoremediation of Lebanese polluted waters: a review of current initiatives

Phytoremediation of Lebanese polluted waters: a review of current initiatives

Application of the thermal time model for different Typha domingensis populations

Application of the thermal time model for different Typha domingensis populations

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