Growth characteristics and nutrient removal capability of plants in subsurface vertical flow constructed wetlands

Liu, Xiao; Huang, Suiliang; Tang, Tingfangzi; Liu, Xuegong; Scholz, Miklas

doi:10.1016/j.ecoleng.2012.03.011

Cited by 55 publications

(19 citation statements)

References 38 publications

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“…The fallen withered plants also squeezed the space required for the growth of new plants. However, by comparison, the heights of the P. australis in the two CWs were higher than that reported for other CWs in northern climates (Liu et al, 2012). The difference in height was probably due to the field conditions, scale of the CWs and the pollutants loadings.…”

Section: Resultsmentioning

confidence: 78%

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Effects of annual harvesting on plants growth and nutrients removal in surface-flow constructed wetlands in northwestern China

Zheng

Wang

et al. 2015

Ecological Engineering

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Section: Resultsmentioning

confidence: 78%

“…Nevertheless, the effects of different plant species on CW performance vary considerably (Brisson and Chazarenc, 2009;Iamchaturapatr et al, 2007). On the other hand, the growth and functions of plants can be impacted by several factors such as the climate condition, temperature, plant species and pollutant loadings (Liu et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Effects of annual harvesting on plants growth and nutrients removal in surface-flow constructed wetlands in northwestern China

Zheng

Wang

et al. 2015

Ecological Engineering

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“…This function is also exerted by plants that are able to tolerate high concentrations of nutrients and heavy metals, and, in some cases, plants are able to accumulate them in their tissues [23]. It has been estimated that between 15 and 32 mg g −1 of TN and 2-6 mg g −1 (dry mass) of TP are removed by CW plants, which was measured in the aboveground biomass [24,25].…”

Section: Role Of Macrophytes In Cwsmentioning

confidence: 99%

Role of Wetland Plants and Use of Ornamental Flowering Plants in Constructed Wetlands for Wastewater Treatment: A Review

et al. 2019

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The vegetation in constructed wetlands (CWs) plays an important role in wastewater treatment. Popularly, the common emergent plants in CWs have been vegetation of natural wetlands. However, there are ornamental flowering plants that have some physiological characteristics similar to the plants of natural wetlands that can stimulate the removal of pollutants in wastewater treatments; such importance in CWs is described here. A literature survey of 87 CWs from 21 countries showed that the four most commonly used flowering ornamental vegetation genera were Canna, Iris, Heliconia and Zantedeschia. In terms of geographical location, Canna spp. is commonly found in Asia, Zantedeschia spp. is frequent in Mexico (a country in North America), Iris is most commonly used in Asia, Europe and North America, and species of the Heliconia genus are commonly used in Asia and parts of the Americas (Mexico, Central and South America). This review also compares the use of ornamental plants versus natural wetland plants and systems without plants for removing pollutants (organic matter, nitrogen, nitrogen and phosphorous compounds). The removal efficiency was similar between flowering ornamental and natural wetland plants. However, pollutant removal was better when using ornamental plants than in unplanted CWs. The use of ornamental flowering plants in CWs is an excellent option, and efforts should be made to increase the adoption of these system types and use them in domiciliary, rural and urban areas.

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“…Better performance of cultivated versus non-cultivated HSSF-CWs for N removal may be due to the absorption of this nutrient by plants. In addition, the plant roots provide favorable conditions for the development of microorganisms capable of transforming the chemical forms of nitrogen (Liu et al, 2012). According to Chen et al (2016), plants release exudates from the roots that affect the density and diversity of the root microbiota, which in turn increase the rates of nutrient removal.…”

Section: Resultsmentioning

confidence: 99%

Efficiency of horizontal subsurface flow-constructed wetlands considering different support materials and the cultivation positions of plant species

Miranda¹,

Matos²,

Matos³

et al. 2020

Rev. ambiente água

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The present work evaluated the influence of filling substrate material (crushed PET bottles or fine gravel) on the efficiency of pollutant removal in horizontal subsurface flow constructed wetlands (HSSF-CWs). They were cultivated with a consortium of elephant grass cv. Napier (Pennisetum purpureum Schum) and Tifton 85 (Cynodon spp.) to treat wastewater from a common milk cooling tank (WWMT). For this, six HSSF-CWs were used which had dimensions of 0.6 m tall x 1.0 m wide x 2.5 m long. In order to investigate possible efficiency loss in the removal of pollutants from the system, operation was divided into two periods: Period I (from April to December 2015) and Period II (April to December 2016). Thus, the removal efficiencies of BOD5, solids and total nitrogen (TN), total phosphorus (TP), potassium (K) and sodium (Na) from WWMT were statistically compared. Results indicated that the efficiency of the HSSF-CWs for removing pollutants increased or remained similar after one year and nine months of their operation; and PET bottles were a viable alternative substrate in HSSF-CWs based on the efficient removal of pollutants from WWMT during the one year and nine months of monitoring. Crushed PET bottles constitute a viable substrate for filling HSSF-CWs. Altering the cultivation positions of the plant species did not change pollutant removal efficiencies, but indicates the importance of species arrangement to maximize system performance.

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Growth characteristics and nutrient removal capability of plants in subsurface vertical flow constructed wetlands

Cited by 55 publications

References 38 publications

Effects of annual harvesting on plants growth and nutrients removal in surface-flow constructed wetlands in northwestern China

Effects of annual harvesting on plants growth and nutrients removal in surface-flow constructed wetlands in northwestern China

Role of Wetland Plants and Use of Ornamental Flowering Plants in Constructed Wetlands for Wastewater Treatment: A Review

Efficiency of horizontal subsurface flow-constructed wetlands considering different support materials and the cultivation positions of plant species

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