Metal and metalloid removal in constructed wetlands, with emphasis on the importance of plants and standardized measurements: A review

Marchand, Lilian; Mench, Michel; Jacob, Donna L.; Otte, Marinus L.

doi:10.1016/j.envpol.2010.08.018

Cited by 336 publications

(166 citation statements)

References 116 publications

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“…If the capacity of CWs to depurate waters from bulk pollutants and nutrients is generally recognized, recent research has been directed to the removal of other contaminants such as metals and organic micropollutants from several types of wastewaters (Matamoros et al, 2008;Rai, 2008;Imfeld et al, 2009;Park et al, 2009;Avila et al, 2010;Marchand et al, 2010;Breitholtz et al, 2012). In particular, several studies showed successful applications of CWs to remove hardly biodegradable organic xenobiotic compounds such as pesticides and pharmaceuticals (Cheng et al, 2002;Matamoros et al, 2008Matamoros et al, , 2012aDordio et al, 2009bDordio et al, , 2010Avila et al, 2010;Hijosa-Valsero et al, 2011;Agudelo et al, 2012;Warsaw et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Constructed wetlands with light expanded clay aggregates for agricultural wastewater treatment

Dordio

Carvalho

2013

Science of The Total Environment

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. H I G H L I G H T S• CW with LECA substrate and Phragmites plants tested with agricultural wastewaters.• High removals of TSS, COD, NH 4 -N, polyphenols, a pharmaceutical and a pesticide.• Contact time of wastewaters with beds ranged from 3 to 9days in batch conditions.• Promising results suggest more studies in full-scale and more realistic conditions. Constructed wetlands (CWs) are receiving a renewed attention as a viable phytotechnology for treating agricultural wastewaters and for the removal of more specific pollutants, in particular recalcitrant ones. In this work, the performance of CW mesocosms using light expanded clay aggregates (LECA) as the bed's substrate and planted with Phragmites australis was investigated for treatment of olive mill wastewater (OMW), swine wastewater (SW) contaminated with oxytetracycline and water contaminated with herbicide MCPA (2-methyl-4-chlorophenoxyacetic acid). Both wastewaters (OMW and SW) initially presented high organic matter content and total suspended solids which were removed by the system with efficiencies higher than 80%. Removal of polyphenols in OMW and nitrogen compounds in SW also showed similar or higher efficiencies in comparison with other treatment systems reported in the literature. The antibiotic oxytetracycline was completely removed from SW within the assay period in unplanted LECA beds, but planted beds allowed a significantly faster removal. In regard to water contaminated with MCPA, the results showed that LECA has a large sorption capacity for this herbicide (removal efficiencies of 56-97%). In general, considerably higher pollutant removal efficiencies were obtained when plants were used (up to 28% higher). The results obtained are indicative that CWs with LECA as substrate may be an adequate option for agricultural wastewater treatment. a b s t r a c t a r t i c l e i n f o

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Section: Introductionmentioning

confidence: 99%

Constructed wetlands with light expanded clay aggregates for agricultural wastewater treatment

Dordio

Carvalho

2013

Science of The Total Environment

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“…These include mechanical filtration, sedimentation, adsorption, and plant and microbial uptake [22]. Laboratory studies have shown that bioretention technology can effectively remove particulate and dissolved heavy metals from urban stormwater runoff and more than 80% of the heavy metals retained in bioretention systems [23][24][25]. Li and Davis [26] showed that the vast majority of heavy metals from urban stormwater runoff were intercepted on the surface layer of the bioretention system.…”

Section: Sourcesmentioning

confidence: 99%

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Wang

Zhao

Yang

et al. 2017

Water

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Heavy metals from urban stormwater runoff are important sources of surface water pollutants. Sand, zeolite, sandy loam, and quartz-sand were separately mixed with lignin to form four bioretention media mixes for experimental study using synthetic stormwater runoff. The average removal efficiencies of four heavy metals (Cu, Zn, Cd, and Pb) by the four media mixes were all better than 97% at the optimum pH of 6.05 (ranging from 6 to 8) and the seven-day rainfall-event interval. The influence of the influent concentration and the rainfall-event interval on the removal efficiency of heavy metals by the four media mixes was not significant, but the variation of the removal efficiencies at the four-day rainfall-event interval was large. Under acidic conditions, there was a certain heavy metal dissolution in the four reactors, but the effect on the removal efficiency was minor. Heavy metals were present in the media mainly in the form of the residual fraction (>50%). The accumulation of Cu, Zn, and Cd in the surface planting-soil layer (same humus and sandy-loam mixture for all reactors) was significantly larger than the accumulation at deeper depths but not for Pb. Overall, the heavy metal removal efficiencies by the four media mixes were not significantly different, and the choice of the planting-soil layer can become the control factor of heavy metal removal.

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“…Plants that can both accumulate metals and have high tolerance to them are important in phytoremediation strategies of contaminated aquatic systems (Clemens et al 2002, Wang at al. 2002, Marchand et al 2010.…”

Section: Introductionmentioning

confidence: 99%

Aquatic Plant Trapa natans L. as Bioindicator of Trace Metal Contamination in a Freshwater Lake (Skadar Lake, Montenegro)

Petrovic¹,

Jančić²,

Furdek³

et al. 2016

Acta Botanica Croatica

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-Skadar Lake is the largest shallow lake in southeastern Europe. It is located within a national park, and is included in the Ramsar List of international important wetlands, so its preservation and protection from pollution is very important. The aim of this study was to investigate bioaccumulation of the ecotoxic metals Cd, Pb and Cr from sediments of Skadar Lake in the aquatic macrophyte Trapa natans L. Samples of sediment and plants were collected at nine locations covering all major water inputs to the lake as well as locations where contamination could be expected. The obtained results indicate that sediments from the Skadar Lake are only locally contaminated with Cd (0.03-1.18 mg kg ). The highest bioaccumulation of all metals from sediment to Trapa natans L. was observed in the root, with accumulation effi ciency decreasing in the order Cd > Cr > Pb. Translocation from root to stem was also higher for Cd than for Cr and Pb, while the translocation from stem to leaf was comparable for all three metals. From the three investigated metals Cd showed the highest mobility. The results indicate that Trapa natans L. may be a very promising bioindicator of trace metal contamination in Skadar Lake.

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Metal and metalloid removal in constructed wetlands, with emphasis on the importance of plants and standardized measurements: A review

Cited by 336 publications

References 116 publications

Constructed wetlands with light expanded clay aggregates for agricultural wastewater treatment

Constructed wetlands with light expanded clay aggregates for agricultural wastewater treatment

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Aquatic Plant Trapa natans L. as Bioindicator of Trace Metal Contamination in a Freshwater Lake (Skadar Lake, Montenegro)

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