The treatment of metals in urban runoff by constructed wetlands

Scholes, Lian N. L.; Shutes, Brian; Revitt, D. Mike; Forshaw, M.; Purchase, Diane

doi:10.1016/s0048-9697(98)00072-2

Cited by 93 publications

(46 citation statements)

References 6 publications

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“…Created wetlands may have conservation benefits in addition to their function in pollutant removal [49]. However, Cu concentrations in wetland sediments can reach levels that impact food webs and communities, particularly in created wetlands [5,7]. Stormwater ponds have high pollutant levels that often exceed USEPA benchmark values for wildlife sensitivity [6], and (by design) metal loads in these ponds increase over time [50].…”

Section: Effects Of Cu Exposure On Marbled Salamandersmentioning

confidence: 99%

Effects of copper exposure on hatching success and early larval survival in marbled salamanders, Ambystoma opacum

Soteropoulos

Lance

Flynn

et al. 2014

Enviro Toxic and Chemistry

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The creation of wetlands, such as urban and industrial ponds, has increased in recent decades, and these wetlands often become enriched in pollutants over time. One metal contaminant trapped in created wetlands is copper (Cu(2+)). Copper concentrations in sediments and overlying water may affect amphibian species that breed in created wetlands. The authors analyzed the Cu concentration in dried sediments from a contaminated wetland and the levels of aqueous Cu released after flooding the sediments with different volumes of water, mimicking low, medium, and high pond-filling events. Eggs and larvae of Ambystoma opacum Gravenhorst, a salamander that lays eggs on the sediments in dry pond beds that hatch on pond-filling, were exposed to a range of Cu concentrations that bracketed potential aqueous Cu levels in created wetlands. Embryo survival varied among clutches, but increased Cu levels did not affect embryo survival. At Cu concentrations of 500 µg/L or greater, however, embryos hatched earlier, and the aquatic larvae died shortly after hatching. Because Cu concentrations in sediments increase over time in created wetlands, even relatively tolerant species such as A. opacum may be affected by Cu levels in the posthatching environment.

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Section: Effects Of Cu Exposure On Marbled Salamandersmentioning

confidence: 99%

Effects of copper exposure on hatching success and early larval survival in marbled salamanders, Ambystoma opacum

Soteropoulos

Lance

Flynn

et al. 2014

Enviro Toxic and Chemistry

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“…al. [77], compararon la eficiencia de un humedal en temporada seca y húmeda, y encontraron que en tiempo seco, se alcanzan valores muy bajos en la eliminación de Zn, Pb y Cu; en cuanto a la temporada lluviosa, los porcentajes de remociones fueron muy altos y alcanzaron el 100% para los mismos parámetros [77].…”

Section: Koob Et Al (1999)unclassified

Tratamiento de aguas de escorrentía mediante humedales artificiales: Estado del arte

Guzmán

Lara-Borrero

2012

Cien.Ing.Neogranadina

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RESUMENLa concentración de contaminantes en aguas lluvia es un tema que preocupa a las entidades gubernamentales porque deterioran la calidad hídrica de las fuentes receptoras. En varios países, se han iniciado investigaciones y desarrollo de metodologías para tratar este tipo de aguas. Una de estas técnicas es la ejecución de humedales artificiales, y es una de las más aceptadas por su gran eficiencia en la remoción de contaminantes. El presente artículo expondrá el estado del conocimiento, estudiando los métodos de diseño, eficiencias y las nuevas tendencias en la investigación de humedales artificiales que tratan aguas lluvia y/o escorrentía urbana.Palabras clave: contaminación de aguas lluvias, fuentes difusas, fuentes puntuales, humedales artificiales, mejores prácticas de manejo (BMP), tratamiento de aguas lluvias. ABSTRACTThe pollutant concentration of rainwater is a critical issue for government agencies since impairs the water quality at receiving sources. Some countries have begun research and developed systems for treatment of those waters where made wetland is the most common structure used. This paper offers a review of made wetland to runoff treatment, including design, effectiveness and new trends to research of made wetlands to treat rainwater and/or urban runoff.

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“…Integrated vertical-flow constructed wetland (IVCW), with the advantages of land saving and predominant effectiveness, has been successfully applied in many cities and countryside areas in China since 1996 [14,17]. Although there are several papers reported the treatment performances of CWs on urban runoff, most of them were constructed with the configuration of horizontal subsurface flow (HSSF) or surface flow (SF) [18][19][20]. To date, studies on the treatment performance or substrate enzyme activity of a combination of the IVCW and other CW configurations (e.g.…”

Section: Introductionmentioning

confidence: 99%

Enzyme activities in pilot-scale constructed wetlands for treating urban runoff in China: temporal and spatial variations

Weijie¹,

Zhu²,

Cheng³

et al. 2014

Desalination and Water Treatment

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A B S T R A C TTwo pilot-scale integrated constructed wetland (ICW) systems were constructed to assess the feasibility of treating urban runoff in Hefei, P.R. China. Each ICW consisted of a downflow chamber (50 m 2 , planted with Canna indica), an up-flow chamber (50 m 2 , planted with Iris pseudacorus), and a horizontal subsurface-flow chamber (50 m 2 , planted with Acorus calamus) in series. Substrate enzyme activities, growth of vegetation, and contaminant removal efficiencies were monitored during a one-year period. These two systems, achieved an average efficiency of 64.8% for total phosphorus (TP), 59.6% for total nitrogen (TN), 52.7% for ammonium (NH þ 4 -N), and 72.7% for chemical oxygen demand (COD). There were significant correlations between the phosphatase (PP) activity and the removal efficiencies of TP and COD, as well as between the urease (UR) activity and TN removal. The activities of both nitrate reductase (NR) and PP were the highest in down-flow chamber (DFC), and then in up-flow chamber (UFC) and horizontal subsurface-flow chamber (HFC), successively. Meanwhile, the maximum enzyme activities of DFC and UFC occurred in summer or autumn when plants were in the vigorous growing stage. Furthermore, the enzyme activities of both PP and UR were significantly correlated with all growth parameters of C. indica in DFC. Significant correlations existed between the root number of I. pseudacorus, and PP and UR activities in UFC. In HFC, there were no significant correlations between the enzyme activities (PP, UR, and NR) and all growth parameters of A. calamus.

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The treatment of metals in urban runoff by constructed wetlands

Cited by 93 publications

References 6 publications

Effects of copper exposure on hatching success and early larval survival in marbled salamanders, Ambystoma opacum

Effects of copper exposure on hatching success and early larval survival in marbled salamanders, Ambystoma opacum

Tratamiento de aguas de escorrentía mediante humedales artificiales: Estado del arte

Enzyme activities in pilot-scale constructed wetlands for treating urban runoff in China: temporal and spatial variations

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