Constructed wetland microcosms for the removal of organic micropollutants from freshwater aquaculture effluents

Gorito, Ana M.; Ribeiro, Ana R.; Gomes, Carlos R.; Almeida, C. Marisa R.; Silva, Adrián M.T.

doi:10.1016/j.scitotenv.2018.06.371

Cited by 81 publications

(28 citation statements)

References 48 publications

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“…Removal in river water treatment with CWs [19][20][21], higher than 52%, are similar to the results obtained in the present study. The ATZ is completely removed from aquaculture effluents in vertical flow constructed wetland [22], which is not the case for the horizontal subsurface flow constructed wetland and free surface wetland, was removal range around 50 -70 % [23][24][25], which are in concordance with the removal obtained in the present work. The MDHJ removals were in the range of those reported in the treatment of domestic wastewater with free surface wetland, around 70 -98 % [26][27] higher than in the treatment of river water, around 58% [28].…”

Section: Discussionsupporting

confidence: 91%

Removal of Organic Micropollutants from Riverine Waters using Constructed Wetlands: A Mesocosms Experiment

Salcedo¹,

Enamorado-Montes²,

Frómeta³

et al. 2018

International Journal of Applied Engineering Research

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Section: Discussionsupporting

confidence: 91%

Removal of Organic Micropollutants from Riverine Waters using Constructed Wetlands: A Mesocosms Experiment

Salcedo¹,

Enamorado-Montes²,

Frómeta³

et al. 2018

International Journal of Applied Engineering Research

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“…0.033 µg/g, indicating MC probable adsorption. Considering the inputs of MC in the water going into the CWs along the 7 weeks and making an estimation of the mass of substrate used in the current systems [26], it can be estimated that ca. half of the MC-LR amount remained adsorbed to the substrate.…”

Section: Discussionmentioning

confidence: 99%

“…For the experiments, circulating tubes with pumps were placed in each container to promote water circulation in the microcosms. More details are provided in Gorito et al [26]. Microcosms were kept under greenhouse-like conditions (in the Chemistry Department, Faculty of Science, University of Porto), namely, natural day/night regime, with a temperature variation between 15 to 25 • C, between September and November 2018.…”

Section: Sampling Microcosm Setup and Experimental Conditionsmentioning

confidence: 99%

“…Although full-scale studies are needed to fully assess possible applications in situ, bench scale studies are generally needed as a first approach to establish test hypothesis such as in the present case. The microcosm approach has shown to suitably represent interactions among plants, microorganisms, substrates, and contaminants within a complex rhizosphere system [26]. As so, current studies were done in microcosms, simulating vertical sub-surface flow CWs with natural lake water.…”

mentioning

confidence: 99%

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Assessment of Constructed Wetlands’ Potential for the Removal of Cyanobacteria and Microcystins (MC-LR)

Bavithra

Azevedo

Oliveira

et al. 2019

Water

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Microcystis blooms and the subsequent release of hepatotoxic microcystins (MCs) pose a serious threat to the safety of water for human and livestock consumption, agriculture irrigation, and aquaculture worldwide. Microcystin-LR (MC-LR), the most toxic variant of MCs, has been widely detected in a variety of environments such as water, sediments, plants, and many aquatic organisms. Conventional solutions of water treatment are costly, requiring specific infrastructure, as well as specialized personnel and equipment. Therefore, these solutions are not feasible in many rural areas or in the treatment of large reservoirs. In this regard, low-cost and low-technology solutions, such as constructed wetlands (CWs), are attractive solutions to treat surface waters contaminated with toxic cyanobacteria blooms from lakes, ponds, reservoirs, and irrigation systems. In line with this, the main aim of this work was to evaluate the potential of CWs for the treatment of water contaminated with MC-LR produced by Microcystis aeruginosa-LEGE 91094. For that, microcosms (0.4 × 0.3 × 0.3 m) simulating CWs were assembled with Phragmites australis to treat lake water contaminated with Microcystis aeruginosa cells and MCs. Results showed removal percentages of M. aeruginosa cells above 94% and about 99% removal of MC-LR during 1 week treatment cycles. CWs maintained their functions, regardless the presence of MC-LR in the system, and also showed significant removal of nutrients (ammonium ion removal up to 86%) and organic matter (removal reaching 98%). The present work indicates that CWs have the potential for removal of cyanobacterial cells and cyanotoxins, which can be useful for the treatment of eutrophic waters and provide water of sufficient quality to be used, for instance, in agriculture.

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“…These contaminants tend to be small, organic molecules that persist through conventional wastewater treatment processes, thus meriting their identification as recalcitrant contaminants (Andreozzi et al 2003;Le-Minh et al 2010). Even in trace amounts, these contaminants can negatively affect the environment, including aquatic life (Gorito et al 2018;Jimenez et al 2018), and public health (Ternes 2004).…”

mentioning

confidence: 99%

High-performance photocatalytic degradation of model contaminants with iron oxide–based colloidal solutions under broad-spectrum illumination

Ambrogi¹,

Asenath‐Smith²,

Brame³

2020

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Small molecule contaminants, such as compounds from pharmaceuticals, personal care products, and pesticides, persist through traditional wastewater treatment processes. Heterogeneous photocatalysis with transition metal oxides (TMOs) is an emerging technology for removing these recalcitrant contaminants from wastewater. To leverage this technology, we selectively combined three different TMOs with bandgap energies in different regions of the solar spectrum as a means of harvesting multiple wavelengths of incident radiation to increase the degradation rate of model and real contaminants. Specifically, we combined zincite (ZnO, ultraviolet active), hematite (α-Fe2O3, visible active), and tenorite (CuO, near-infrared active). The combination of tenorite and hematite (2:1 mass ratio) was the most effective, degrading methyl orange with a rate constant of 40±1E-03 min −1. When applied to multicontaminant solutions using laboratory illumination, our multispectral photocatalyst degrades real-world contaminants, methyl orange, carbamazepine, and nitrobenzene, with rate constants of 30±1E-03, 24±1E-03, and 6±1E-03 min −1 , respectively. In addition, the material degrades contaminants with a greater efficiency under outdoor solar illumination, with Collector Area per Order values of 4.0, 6.1 and 14.5 kWh/order/m 3 , for methyl orange, carbamazepine, and nitrobenzene, respectively. These results demonstrate the effectiveness of this approach to purify water for strategic applications. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.

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Constructed wetland microcosms for the removal of organic micropollutants from freshwater aquaculture effluents

Cited by 81 publications

References 48 publications

Removal of Organic Micropollutants from Riverine Waters using Constructed Wetlands: A Mesocosms Experiment

Removal of Organic Micropollutants from Riverine Waters using Constructed Wetlands: A Mesocosms Experiment

Assessment of Constructed Wetlands’ Potential for the Removal of Cyanobacteria and Microcystins (MC-LR)

High-performance photocatalytic degradation of model contaminants with iron oxide–based colloidal solutions under broad-spectrum illumination

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