Importance of plant species for nitrogen removal using constructed floating wetlands in a cold climate

Choudhury, Maidul I.; Segersten, Joel; Hellman, Maria; McKie, Brendan G.; Hallin, Sara; Ecke, Frauke

doi:10.1016/j.ecoleng.2019.07.012

Cited by 28 publications

(11 citation statements)

References 35 publications

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“…However the assimilation of nutrients in the water by the macrophytes was evidenced by the production of biomass with annual P values of 9 g P m -2 at AFI-P and 5 g P m -2 at AFI-S, while N values were 48 g N m -2 at AFI-P and 32 g N m -2 at AFI-S. These results exceed the values recorded in AFI models in which the same plant species were evaluated (Pavan et al, 2015;Castro-Castellon et al, 2016;Wang et al, 2015;Choudhury et al, 2019) and it could be explained due to the number of plants used in our models and the contact time with the water.…”

Section: Discussionmentioning

confidence: 78%

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Changes in cyanobacterial density due to application of Artificial Floating Island model with macrophytes: an experimental case study in a tropical reservoir

Ramı́rez-Garcı́a¹,

Chicalote-Castillo²

2020

J Limnol

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The Valle de Bravo (VB) reservoir is part of an important hydraulic system that provides about 40% of potable water to 21.5 million inhabitants of the Metropolitan Zone of Mexico City (Mexico). This reservoir shows deterioration in water quality due to its current eutrophic condition, which favors the recurring of cyanobacterial blooms. To date, there are no restoration strategies for this reservoir, so the use of eco-technologies such as Artificial Floating Islands (AFI) is proposed for the removal of nutrients and the improvement of water quality. Therefore, in this work AFIs have been implemented using two macrophytes (Phragmites australis (AFI-P) and Schoenoplectus sp. (AFI-S)) to evaluate the presence and distribution of potentially toxic cyanobacteria in relation to physicochemical variations at the AFI sites. The study was carried out over a period of 24 months (October 2016 -September 2018) divided into two cycles (C-I and C-II) with a dry and rainy season each. Cyanobacteria were the dominant group in the phytoplankton during all the study period. Nine potentially toxic cyanobacterial species were detected, with the predominance of Microcystis aeruginosa, Aphanizomenon yezoense, Pseudanabaena mucicola, Anabaena planctonica and Planktothrix agardhii. In this work, AFIs increased nitrates and had no effect on phosphates. Cyanobacteria were not reduced at AFI sites, however in rainy season in the second annual cycle (C-II) the concentrations of extracellular microcystins in the AFI-P and AFI-S were decreased while intracellular toxins were more strongly reduced only in the AFI-S. Each AFI had a specific effect on four out of five potentially toxic cyanobacteria. Thus, AFI-P promoted the increase of M. aeruginosa but reduced A. planctonica, while AFI-S promoted both A. yezoense and P. mucicola. The AFIs modified the dynamics among cyanobacteria particularly diazotrophic A. yezoense which was favored by nitrates and the other three species maintained their presence by the phosphates. M. aeruginosa, non-diazotrophic, responded to nitrates only in the absence of A. yezoense. Finally, in VB reservoir we found a mutually exclusive relationship between M. aeruginosa and A. yezoense likewise between A. planctonica and P. mucicola.

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Section: Discussionmentioning

confidence: 78%

“…Gmel.) Palla has a removal performance of 3.5 g m -2 for P and 9.5 g m -2 for N (Wang et al, 2015;Choudhury et al, 2019).…”

mentioning

confidence: 99%

Changes in cyanobacterial density due to application of Artificial Floating Island model with macrophytes: an experimental case study in a tropical reservoir

Ramı́rez-Garcı́a¹,

Chicalote-Castillo²

2020

J Limnol

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“…Constructed wetland (CWs) is an ecological technology for wastewater treatment (Choudhury et al, 2019). According to the flow direction of wastewater, CWs can be mainly divided into surface flow, subsurface flow, and vertical flow CWs (Ghimire, Nandimandalam, Martinez‐Guerra, & Gude, 2019; Nivala et al, 2019; Phong Vo et al, 2019; Rabello, Teixeira, Gonçalves, & Salomão, 2019).…”

Section: Engineered Wetlands and Natural Systemsmentioning

confidence: 99%

Emerging pollutants—Part II: Treatment

Liu

Zhang

Chang

2020

Water Environment Research

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Emerging pollutants (EPs) refer to a class of pollutants, which are emerging in the environment or recently attracted attention. EPs mainly include pharmaceutical and personal care products (PPCPs), endocrine-disrupting chemicals (EDCs), and antibiotic resistance genes (ARGs). EPs have potential threats to human health and ecological environment. In recent years, the continuous detections of EPs in surface and ground water have brought huge challenges to water treatment and also made the treatment of EPs become an international research hotspot. This paper summarizes some research results on EPs treatment published in 2019. This paper may be helpful to understand the current situations and development trends of EP treatment technologies.

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“…According to Choudhury et al (2019), research has been conducted on constructed floating wetlands (CFWs) in tropical and temperate climates but little is known about the efficiency of colder climates in removing nitrogen. This study was conducted in northern Sweden where the average annual temperature in the winter ranges from 5.9°C to -37°C.…”

Section: Original Articlementioning

confidence: 99%

Wetlands for environmental protection

Martinez‐Guerra

Ghimire

Nandimandalam

et al. 2020

Water Environment Research

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This article presents an update on the research and practical demonstration of wetland-based treatment technologies for protecting water resources and environment covering papers published in 2019. Wetland applications in wastewater treatment, stormwater management, and removal of nutrients, metals, and emerging pollutants including pathogens are highlighted. A summary of studies focusing on the effects of vegetation, wetland design and operation strategies, and process configurations and modeling, for efficient treatment of various municipal and industrial wastewaters, is included. In addition, hybrid and innovative processes with wetlands as a platform treatment technology are presented.

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Importance of plant species for nitrogen removal using constructed floating wetlands in a cold climate

Cited by 28 publications

References 35 publications

Changes in cyanobacterial density due to application of Artificial Floating Island model with macrophytes: an experimental case study in a tropical reservoir

Changes in cyanobacterial density due to application of Artificial Floating Island model with macrophytes: an experimental case study in a tropical reservoir

Emerging pollutants—Part II: Treatment

Wetlands for environmental protection

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