Assessing the effectiveness of pollutant removal by macrophytes in a floating wetland for wastewater treatment

Prajapati, Meera; Bruggen, J.J.A. van; Dalu, Tatenda; Malla, Rabin

doi:10.1007/s13201-017-0625-2

Cited by 26 publications

(5 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The uptake of these metals is generally high when water pH is <7 as observed in the current study. This is in agreement with Dube et al [ 21 ], Obarska-Pempkowiak et al [ 51 ] and Prajapati et al [ 52 ], who observed that these elements are taken by roots and translocated to the stems and leaves. Furthermore, the strong positive correlation in Fe concentration between sediment and P. australis stems indicates that Fe metal uptake is dependent on river sediment concentrations.…”

Section: Discussionsupporting

confidence: 92%

Quantifying Metal Contamination and Potential Uptake by Phragmites australis Adans. (Poaceae) Along a Subtropical River System

Netshiongolwe

Cuthbert

Maenetje

et al. 2020

Plants

Self Cite

View full text Add to dashboard Cite

: Metal pollution is pervasive across terrestrial and aquatic ecosystems owing to anthropogenic activities. Sediments can accrue high concentrations of metals and act as secondary sources, and thus may be valuable indicators of metal contamination across spatiotemporal scales. In aquatic systems, the extent of metal pollution may be further mediated by transference among sediments and living organisms, with plant metal contaminants potentially predictive of underlying sediment concentrations. The present study thus quantifies the extent of metal pollutants (Na, K, Ca, Mg, Cu, Zn, Mn, B, Fe) across multiple study sites and seasons (cool-dry, hot-wet, hot-dry) in a subtropical river system. Furthermore, uptake by a key macrophyte species, Phragmites australis, was examined and correlated with sediment pollution levels among different plant parts. Overall, sediment pollution load indices differed seasonally, being significantly highest during the cool-dry season irrespective of sampling location, suggesting that periods with reduced water flows can exacerbate metal pollution levels in riverine sediments. Also, metal concentrations were highest in upstream wetland sites, indicating a capacity for metal sink effects in these areas. Overall, macrophytes contained high concentrations of select metals, however composition and concentrations differed across plant parts, with roots containing particularly high concentrations of Fe and B. Correlations between sediment and macrophyte concentrations were mostly non-significant, whilst stem Mn and Fe concentrations correlated significantly negatively and positively to sediment concentrations, respectively. The present study identifies key spatiotemporal differences in multiple metal contaminants in an understudied subtropical aquatic system that align with hydrological regime differences. Whilst macrophytes were not found to be major accumulators, or predictors, of metal contaminants in this study, they may collectively play a central role in concentration regulation in aquatic systems.

show abstract

Section: Discussionsupporting

confidence: 92%

Quantifying Metal Contamination and Potential Uptake by Phragmites australis Adans. (Poaceae) Along a Subtropical River System

Netshiongolwe

Cuthbert

Maenetje

et al. 2020

Plants

Self Cite

View full text Add to dashboard Cite

show abstract

“…Chen et al (2016) emphasize that the efficiency of BOD and COD reduction in FTW has a very wide range of limits, i.e., 36-90% for BOD and 17-84% for COD. In the experimental FTW established by Prajapati et al (2017) the efficiency of BOD reduction was 87-94%, COD 50-57% and TOC 48-53%. According to the authors, these results point to a significant reduction of organic matter in FTW.…”

Section: Resultsmentioning

confidence: 97%

“…Plants also had an important role in removing excess organic matter. Thanks to the welldeveloped root system, they provided a large area for the development of a biofilm, i.e., rhizosphere that hosted aerobic microorganisms (Prajapati et al, 2017). The large biomass of roots, which were hanging free in the water, enabled the filtration of solid particles of organic matter and their deposition on the surface of the root system or at the bottom of the cell (Van de Moortel et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Removal of organic matter in floating treatment wetland

Čule¹,

Lučić²,

Nešić³

et al. 2022

Sustain Forestry

View full text Add to dashboard Cite

Organic matter is considered one of the main sources of water pollution caused by the discharge of wastewater of different categories directly into rivers. The increased content of organic matter serves as a source of food for water microorganisms and significantly lowers dissolved oxygen of the recipient. Floating treatment wetlands (FTW) are an innovative green technology that removes excess organic matter from water. This paper shows the effectiveness of floating treatment wetlands in removing organic matter from the water of a polluted urban river. Cells with floating islands had BOD reduced by 84-91%, COD in the range of 57-65% and TOC by 16-20%. The highest efficiency in COD and TOC reduction was achieved in Cell I where P. australis was planted, and BOD in Cell II where C. indica was planted. The results of these studies showed that after 6 days of treatment of polluted water, a high reduction of BOD and COD was achieved, as well as a satisfactory reduction of TOC concentration.

show abstract

“…Transformation of pollutants vary with depth and is a crucial factor in determining contaminant removal by affecting the redox status and dissolved oxygen level in CWS. The microbial community is highly active near the root zone favouring organic removal (Prajapati et al 2017). Yang et al (2017) reported that as the OLR increases, the removal rate of BOD and COD in aerobic bio filters increased.…”

Section: Removal Of Organics In Vfcwsmentioning

confidence: 99%

Pollutant Removal from Sewage in Tropical Climate by Constructed Wetland System: An Asset for Irrigation

Usharani

Vasudevan

2021

ILNS

View full text Add to dashboard Cite

In the global outlook, letting of untreated sewage in existing river bodies deteriorates the water quality. The seepage likely depreciates the quality of ground water too. The quality of groundwater with special reference to India has tremendously gone down in the past twenty years leading to sour taste. On the other hand, agriculture sector is deprived of water in many places of India. A solution can be arrived concurrently by treating sewage and consuming the effluent in agricultural sector. First order kinetics was applied in constructed wetland system at different flow rates and optimised. At optimised HLR, effluent met the standards of discharge that can be utilized for agricultural/ irrigational purpose. The emanating major pollutants can be effectively treated using constructed wetland system under tropical climate. A few clippings at the onsite treatment illustrated the diversity of species thus adjoining sustainable biodiversity and treatment. Thus in tropical countries like India, constructed wetland system might pave solution not only for the treatment of sewage but in deploying the effluent in agricultural sector. A clean ecosystem can be achieved with sustainability.

show abstract

Assessing the effectiveness of pollutant removal by macrophytes in a floating wetland for wastewater treatment

Cited by 26 publications

References 25 publications

Quantifying Metal Contamination and Potential Uptake by Phragmites australis Adans. (Poaceae) Along a Subtropical River System

Quantifying Metal Contamination and Potential Uptake by Phragmites australis Adans. (Poaceae) Along a Subtropical River System

Removal of organic matter in floating treatment wetland

Pollutant Removal from Sewage in Tropical Climate by Constructed Wetland System: An Asset for Irrigation

Contact Info

Product

Resources

About