Nitrogen and Phosphorus Removal Efficiency of Three Helophytes in Constructed Surface Flow Wetlands for Urban Wastewater Treatment

Ennabili, Abdeslam; Radoux, Michel

doi:10.31436/iiumej.v21i2.1207

Cited by 6 publications

(3 citation statements)

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“…On the other hand, in the planted reactor filtrates, the respective mean concentrations of NO2and NO3are 0.70 mg/l and 49.82 mg/l. The significant decrease in total nitrogen and ammonium content in both filters, with a greater reduction in the planted system, shows that planted sub-surface horizontal flow treatment systems are more effective in reducing the nitrogen content of wastewater (Ennabili and Radoux, 2020). Indeed, several studies, including those by Weaver et al (2003) and Münch et al (2004), have shown that in the planted reactor, the transfer of atmospheric oxygen into the substrate through the root system creates aerobic conditions that increase the redox potential in the anoxic zones and enable nitrification, the products of which are NO2and NO3 -.…”

Section: Nitrogen Compound Contentmentioning

confidence: 93%

Purification performance at the entrance and exit of an artificial marsh in duplicate (plant and control) with Horizontal Sub-Area Flow (Al Haouz, Marrakesh, Morocco)

2024

Int. J. Biosci.

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Increasing demand for water for human, industrial and agricultural consumption, coupled with repeated national droughts, have prompted decision-makers to consider wastewater as a valuable water resource that must be reused after treatment. This study is part of the integrated management of water resources in the face of the water shortage affecting our country, by looking at the treatment of greywater from the dwellings of a village in Marrakech. This study focuses on the treatment and reuse of greywater through a planted filter, using a reed (Phragmites australis), with horizontal sub-surface flow and another unplanted to determine the purification efficiency of this type of treatment system through the measurement of certain physicochemical parameters of wastewater such as: nitrogen compounds, phosphorus compounds, suspended solids etc. This study provides an overview of the elements relating to the works planned for autonomous wastewater treatment. The results of the analyses obtained during this study have helped us to establish a diagnosis of certain physico-chemical parameters, and to measure the degree of pollution of domestic wastewater, and to draw certain remarks as follows: Human activity in towns and cities is at the root of changes in the degree of pollution of urban wastewater. To achieve near-optimum environmental protection, and for every domestic wastewater reuse project, the State must regulate and opt for environmental impact studies.Economically speaking, local authorities can treat domestic wastewater at very affordable costs.

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Section: Nitrogen Compound Contentmentioning

confidence: 93%

Purification performance at the entrance and exit of an artificial marsh in duplicate (plant and control) with Horizontal Sub-Area Flow (Al Haouz, Marrakesh, Morocco)

2024

Int. J. Biosci.

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“…Depending on a mechanized control scenario, Pistia harvesting will provide a valuable biomass source for composting, vermiculture, livestock feed, or biogas production, with inoculation or mixed with cattle manure (Abbasi et al 1991;Zennaki et al 1996;Mishima 2008;Hussner et al 2017;Gusain et al 2018). This recovery option may also involve biomass from local aquatic, semi-aquatic, or riparian plants that share the same habitat as Pistia (Khabbach et al 2019) and have been successfully tested in phytoremediation (Ennabili et al 2019;Ennabili & Radoux 2020, in order to partially compensate harvesting costs, reduce disposal of phytomass in landfills, and avoid involuntary propagation of the viable parts of the collected plant.…”

Section: Plant Biomassmentioning

confidence: 99%

“…Several applied research studies recommend the use of this invasive species in phytoremediation by virtue of its water pollution tolerance, nutrient and metal retention capacities (Lu et al 2010(Lu et al , 2011Galal & Farahat 2015;Prajapati et al 2012). However, there are native aquatic (Sasmaz et al 2015;Ennabili et al 2019), semi-aquatic (Bello et al 2018;Ennabili & Radoux 2020), or riparian (Cristaldi et al 2020;Ennabili & Radoux 2021) plant species that all have demonstrated these benefits, and consequently, this should not be a reason for its introduction for this purpose either. Moreover, the natural aquatic vegetation of Morocco also hosts species with ornamental potential, namely Nymphaeaceae, Hydrocharitaceae, Haloragaceae, Alismataceae, Crassulaceae, etc.…”

Section: Introductionmentioning

confidence: 99%

Functional aspects of Pistia stratiotes, an invasive plant of Al Jawahir (Fez) wadi lentic habitats

Ennabili¹

2022

Bot. complut.

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Excessive growth of invasive alien aquatic plants threatens local ecosystems and has both ecological and economic impacts. This work highlights morphological and functional aspects of Pistia stratiotes L., first reported in Fez in 2012. The total photosynthetic surface of a Pistia plant is highly correlated (R2=0.72) to the product of the length and maximum width of the external leaf. The total biomass of Pistia was highly related (R2=0.71) to plant size and averaged 67.54±26.35 g dw.m-2. Its peak does not necessarily co-occur with flowering and/or high production of stolons. The total nitrogen and phosphorus mineralomasses correspond to 11.46±4.55 kg N.ha-1 and 0.83±0.33 kg P.ha-1. The biomass and mineralomasses of Pistia, estimated under these invasive conditions, ranks it among the least productive Moroccan wetland plants.

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Importance of Wetlands in Maintaining the Richness of Morocco’s Vascular Flora

2021

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Morocco's wetlands are renowned much more for their abundance and diversity than for their extent. The vascular flora of wetlands is not properly considered in national programs for the conservation and protection of biodiversity, although the first work concerning it dates back about half a century. This work highlights the overall richness of wetlands in terms of vascular plants. Indeed, around 36% of the Moroccan vascular flora exist in wetlands as specific (ST), facultative (FT) or opportunistic (OT) taxa. This taxonomic richness of wetlands, notable in North Atlantic Morocco and the Rif, depends more on local conditions than on bio-geographical zoning. The various factors that threaten this richness of vascular flora are emphasized in the context of disturbing wetland habitats and alarming global warming, i.e. unreliable database of local wetland biodiversity, inefficiency of development programs and actions that have been attempted, and non-comprehensive decision-making. It is particularly expected that Morocco's commitment to the conservation of global biodiversity will lead to the development of a sustainable policy to conserve local wetlands.

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Nitrogen and Phosphorus Removal Efficiency of Three Helophytes in Constructed Surface Flow Wetlands for Urban Wastewater Treatment

Cited by 6 publications

References 0 publications

Purification performance at the entrance and exit of an artificial marsh in duplicate (plant and control) with Horizontal Sub-Area Flow (Al Haouz, Marrakesh, Morocco)

Purification performance at the entrance and exit of an artificial marsh in duplicate (plant and control) with Horizontal Sub-Area Flow (Al Haouz, Marrakesh, Morocco)

Functional aspects of Pistia stratiotes, an invasive plant of Al Jawahir (Fez) wadi lentic habitats

Importance of Wetlands in Maintaining the Richness of Morocco’s Vascular Flora

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