Effects of flooding regime and meteorological variability on the removal efficiency of treatment wetlands under a Mediterranean climate

2019 ◽  
Vol 668 ◽  
pp. 577-591 ◽  
Author(s):  
David Sanchez-Ramos ◽  
David G. Aragones ◽  
Máximo Florín
Keyword(s):  
Removal Efficiency ◽  
Mediterranean Climate ◽  
Treatment Wetlands ◽  
Flooding Regime

scholarly journals Capacity of Two Ornamental Species (Iris sibirica and Zantedeschia aethiopica) to Take up, Translocate, and Accumulate Carbamazepine under Hydroponic Conditions

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1272
Author(s):  
Allan Tejeda ◽  
Florentina Zurita
Keyword(s):  
Removal Efficiency ◽  
Plant Uptake ◽  
Crucial Role ◽  
Parent Compound ◽  
Pilot Scale ◽  
Treatment Wetlands ◽  
Zantedeschia Aethiopica ◽  
Hydroponic Conditions ◽  
Ornamental Species ◽  
Plant Harvesting

Iris sibirica and Zantedeschia aethiopica are ornamental species that have previously been used in pilot-scale treatment wetlands (TWs) focused on the removal of carbamazepine (CBZ), in which good results were obtained; however, the plant influence was not completely determined. In addition, plant uptake has been reported to play a crucial role in CBZ removal in comparison to other mechanisms. Therefore, the aim of this study was to evaluate the capacity of I. sibirica and Z. aethiopica to take up, translocate, and accumulate CBZ in hydroponic conditions using a nutrient solution spiked with the drug. The maximum CBZ tolerance threshold for the two species was found to be 10 mg/L, which was used to carry out the uptake experiments. The results showed a better performance of I. sibirica compared to Z. aethiopica reaching 31.1% and 20.9% of removal efficiency, respectively. The parent compound accumulated mainly on the leaves of both species. Furthermore, a high proportion of the CBZ taken up by the plants (up to 70%) was metabolized by both species. The performance of the two species suggests the importance of plant harvesting in TWs in order to promote CBZ removal and indicates the need for future works.

Plant growth and nutrient uptake in treatment wetlands for water with low pollutant concentration

2017 ◽  
Vol 77 (4) ◽  
pp. 1072-1078 ◽  
Author(s):  
Gilles Vincent ◽  
Kankan Shang ◽  
Guowei Zhang ◽  
Florent Chazarenc ◽  
Jacques Brisson
Keyword(s):  
Plant Growth ◽  
Nutrient Uptake ◽  
Removal Efficiency ◽  
High Efficiency ◽  
P Uptake ◽  
Pollutant Removal ◽  
Pollutant Concentration ◽  
Treatment Wetlands ◽  
Pollutant Concentrations ◽  
Urban Stormwater Quality

Abstract The objective of this study was to determine how macrophytes commonly used in treatment wetlands (TWs) respond to water with low pollutant concentration. We measured pollutant removal efficiency and compared growth and nutrient uptake of five macrophytes in demonstration scale units (volume >40 m3) irrigated by water with pollutant concentrations representative of average urban stormwater quality. All species showed a strong productivity gradient along the beds, starting with high biomass – high density near the inlet, then decreasing progressively with distance. Cyperus was by far the most productive species. Phragmites and Thalia had higher biomass in the first few metres of the beds than Typha and Arundo. In terms of pollutant removal, decreasing plant growth may be interpreted as indicative of high efficiency when caused by nutrient depletion. Differences in aboveground biomass between species did not translate into measurable differences in removal efficiency at the outlet. Although Phragmites australis is the species most commonly used in TWs, under the low nutrient load, Cyperus had twice its biomass, and higher N and P uptake. These results highlight the importance of considering wastewater characteristics when selecting macrophyte species for TWs.

scholarly journals Microbial nitrate removal efficiency in groundwater polluted from agricultural activities with hybrid cork treatment wetlands

2019 ◽  
Vol 653 ◽  
pp. 723-734 ◽  
Author(s):  
Lorena Aguilar ◽  
Ángel Gallegos ◽  
Carlos A. Arias ◽  
Isabel Ferrera ◽  
Olga Sánchez ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Nitrate Removal ◽  
Treatment Wetlands ◽  
Agricultural Activities

scholarly journals Pollution Characteristics of Typical Antibiotic Resistance Genes in Sludge Treatment Wetlands

2020 ◽  
Vol 194 ◽  
pp. 04010
Author(s):  
Zhuma Luosang ◽  
Wanjun Zhang ◽  
Junwen Ma ◽  
fengying Huang ◽  
Yubo Cui
Keyword(s):  
Antibiotic Resistance ◽  
Removal Efficiency ◽  
Resistance Genes ◽  
Antibiotic Resistance Genes ◽  
Bottom Layer ◽  
Treatment Wetlands ◽  
Sludge Treatment ◽  
Pollution Characteristics ◽  
Box Method

The in-situ static box method was used to conduct a comparative experiment on sludge treatment wetlands (STWs). STW1 had ventilation structure, without reeds and STW2 had ventilation and was planted with reeds. The absolute abundance of sulfonamide, tetracycline and macrolide antibiotic resistance genes (ARGs) in the two STWs were analyzed, and the paper discussed pollution characteristics of typical antibiotic resistance genes in the two STWs. The results showed that three ARGs, sul1 (sulfonamides), tetC (tetracyclines), ermf (macrolides), were detected in STW1 and STW2. The concentration of arginine was sul1 > tetC > ermf. The concentration level of AGRS in STW1 and STW2 was lower in bottom layer than that of surface layer sludge. The removal efficiency of ARGs in the same system was tetC > sul1 > ermf, and the removal efficiency of surface sludge and bottom sludge in different systems was STW2 > STW1. Planting wetland plants in the STW can promote the removal of ARGs.

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