Nitrogen removal efficiencies in a free water surface constructed wetland in relation to plant coverage

García-Lledó, Arantzazu; Ruiz-Rueda, Olaya; Vilar-Sanz, Ariadna; Sala, Lluís; Bañeras, Lluís

doi:10.1016/j.ecoleng.2010.06.034

Cited by 31 publications

(18 citation statements)

References 27 publications

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“…For the effect of reed coverage on water quality, other possible w a t e r r e s e a r c h 4 6 ( 2 0 1 2 ) 5 6 3 5 e5 6 4 4 mechanisms may be included, such as nutrient cycling rate, availability of sedimentary nutrients (i.e., labile N and P), microbial population and activity under dense reed coverage. Some researches have manifested that the reeds showed positive effects on the functioning and structure of bacterial communities involved in N removal of eutrophication lakes (Ruiz-Rueda et al, 2009;García-Lledó et al, 2011). Therefore, further research should be carried out in this regard.…”

Section: 3mentioning

confidence: 94%

A shallow lake remediation regime with Phragmites australis : Incorporating nutrient removal and water evapotranspiration

et al. 2012

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Section: 3mentioning

confidence: 94%

A shallow lake remediation regime with Phragmites australis : Incorporating nutrient removal and water evapotranspiration

et al. 2012

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“…Additionally, lower nitrate concentrations in summer could be explained by the fact that the uptake of nutrients increases as the growth of macrophytes is promoted by warm and long daylight periods. This is in contrast to the colder seasons, when the macrophytes' activity is low [17,34,37,[39][40][41][42][43]. Moreover, the VMM report of 2012 indicated that the decreasing tendency of nitrate concentrations shown from 2009 to the present time is the result of implementing the Manure Decree in 2000, the enforcement of standard levels, and the reduction of livestock production [44].…”

Section: Total Nitrogen-nitrate Concentrations and Water Quantity Meamentioning

confidence: 99%

Assessing the Integration of Wetlands along Small European Waterways to Address Diffuse Nitrate Pollution

Donoso

Gobeyn

Boets

et al. 2017

Water

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Nitrate concentrations in numerous European fresh watercourses have decreased due to end-of-pipe measures towards manure and fertilization management, but fail to meet the environmental objectives. The implementation of complementary measures to attenuate diffuse nitrate pollution in densely populated regions characterised by limited available area has been barely studied. To tackle this issue, this study evaluates the feasibility of integrating Constructed Wetlands (CWs) along waterways as a promising tool to facilitate compliance with the nitrate regulations. The aim is to calculate the required area of land alongside a specific watercourse to integrate CWs to reduce nitrate concentrations consistently below the 11.3 and 5.65 mgNO 3 -N/L levels, according to the Nitrates Directive and the Flemish Environmental Regulations. Nitrate-nitrogen removal efficiencies achieved at case study CWs were compared and validated with reported values to estimate the needed wetland areas. In addition, the removal efficiencies and areas needed to meet the standards were calculated via the kinetic model by Kadlec and Knight. The predicted areas by both methods indicated that CWs of 1.4-3.4 ha could be implemented in certain regions, such as Flanders (Belgium), with restricted available land. To conclude, three designs for ICWs (Integrated Constructed Wetlands) are proposed and evaluated, assessing the feasibility of their implementation.

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“…One strategy to mitigate downstream impacts due to global increased fertiliser and pesticide use has been to implement constructed wetlands to intercept run-off from intensively cultivated landscapes. Use of free water surface constructed wetlands has increased globally in the last decade in countries such as China, [5][6][7] South Africa, [8,9] France, [10] Norway, [11] Spain, [12] and the USA. [13][14][15][16][17] Although constructed wetlands are recognised as reliable technology for wastewater treatment, [18,19] the technology has only recently begun to be widely implemented for mitigation of non-point source pollution such as agricultural run-off.…”

Section: Introductionmentioning

confidence: 99%

Influence of varying nutrient and pesticide mixtures on abatement efficiency using a vegetated free water surface constructed wetland mesocosm

Lizotte

Locke

Testa

2014

Chemistry and Ecology

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The nutrient and pesticide abatement efficiency of varying mixtures was examined in a vegetated free water surface constructed wetland. Three different agricultural chemical pollutant mixture conditions were assessed: nutrients only (N and P); pesticides only (atrazine, S-metolachlor and permethrin); and a mixture of nutrients and pesticides. With nutrients only, 672 h nutrient mitigation of 77-91% total phosphorous (TP) and 74-98% total nitrogen (TN) was associated with distance from the injection point and rainfall, whereas with nutrient and pesticide mixtures, 672 h nutrient mitigation of 11-71% TP and 84-98% TN were associated with distance and time. With pesticides only, 672 h pesticide mitigation of 50-99% was associated with distance and time, whereas with nutrients and pesticide mixtures, 672 h pesticide mitigation of 48-99% was associated primarily with distance. Dissipation half-lives were 2-10 times greater for P and 1.5-5 times greater for N when pesticides were present. Pesticide dissipation half-lives showed no clear differences with or without nutrients. While vegetated free water surface constructed wetlands can be effective best management practice tools to trap and abate agricultural run-off during rainfall events, efficiencies can be affected by different types of complex pollutant mixtures and wetland design and implementation should accommodate varying efficiencies.

show abstract

Nitrogen removal efficiencies in a free water surface constructed wetland in relation to plant coverage

Cited by 31 publications

References 27 publications

A shallow lake remediation regime with Phragmites australis : Incorporating nutrient removal and water evapotranspiration

A shallow lake remediation regime with Phragmites australis : Incorporating nutrient removal and water evapotranspiration

Assessing the Integration of Wetlands along Small European Waterways to Address Diffuse Nitrate Pollution

Influence of varying nutrient and pesticide mixtures on abatement efficiency using a vegetated free water surface constructed wetland mesocosm

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